Materials Science and Engineering Commons^™

Adhesive Wear Characteristics Of Mono And Hybrid Cf/Ep Composite With Nano-Hap Filler, Divya Gurkar Somashekar, Naveena Bettahalli Eswaregowda, Suresha Bheemappa

Journal of Metals, Materials and Minerals

Composites materials with more than two reinforcing materials are called hybrid composites.  Tailoring the composites by hybridizing fillers, fibers and matrix will yield better properties compared to mono-composites. Hence, an effort has been made in the current research work to develop carbon fiber epoxy hybrid nanocomposites, comprising different weight percentage of Hydroxyapatite (HAP) to evaluate the potential effects on tribological properties using two body sliding wear method. Taguchi technique (L27 array) has been adopted to investigate the impact of parameters such as filler inclusion (0%, 1.5%, and 3%), load (30, 45, and 60 N), sliding velocity (1, 2, and 3 …

Effects Of Oleylamine Concentration On The Synthesis Of Formamidinium Lead Halide Perovskite Nanocrystals And Physical-Optical Properties, Kunlasatree Kunsaeng, Yingyot Infahsaeng

Journal of Metals, Materials and Minerals

Perovskite nanocrystals (PNCs) has been extensively interested owing to their distinctive properties for applications in optoelectronics and energy harvesting. The properties of these nanocrystals, including optical and energy characteristics, can be tuned by adjusting the particle size using different synthesis techniques. Among these, the ligand-assisted reprecipitation (LARP) method has become popular for its simplicity and scalability. Nevertheless, it is vital to understand that the growth of PNCs is extremely sensitive to the conditions of synthesis, highlighting the importance of recognizing the factors that limit the formation and properties of PNCs. In this study, PNCs based on formamidinium lead bromide (FAPbBr3) …

Synthesis And Visible Light Photocatalytic Activity Of Silver Zinc Phosphates, Rina Kanemoto, Hiroaki Onoda

Journal of Metals, Materials and Minerals

Currently, photocatalytic materials in common use mainly use ultraviolet light, but the amount of ultraviolet light contained in sunlight is limited and their energy efficiency is known to be low. Therefore, there is a need for a compound that shows photocatalytic activity in visible light, and silver phosphate matches this requirement, but it is relatively expensive. In this study, photocatalytic materials that could use visible light and were relatively inexpensive were attempted to be prepared. Specifically, samples were prepared by changing the silver/zinc molar ratio (Ag/Zn = 100/0, 90/10, 80/20, 70/30, 60/40), and each sample was evaluated and examined from …

Fabrication And Characterization Of Zinc Anode On Nickel Conductive Cloth For High-Performance Zinc Ion Battery Applications, Tanapoom Mawintorn, Kittima Lolupiman, Napat Kiatwisarnkij, Pattaraporn Woottapanit, Manickavasakam Karnan, Suwimon Saneewong Na Ayuttay, Xinyu Zhang, Panyawat Wangyao, Jiaqian Qin

Journal of Metals, Materials and Minerals

The development of advanced materials for energy storage is critical to addressing global energy challenges. Zinc-ion batteries offer a promising solution due to their safety, cost-effectiveness, and environmental friendliness. In this study, we enhanced the conductivity of cotton by coating it with electroless nickel, followed by zinc electroplating, to create a flexible material suitable for zinc-ion battery applications. Cotton was coated with electroless nickel at temperatures ranging from 40°C to 60°C for 1 min to 13 min. Subsequently, zinc electroplating was performed with current densities of 0.02 A·cm‒2 for 60 min, 0.03 A·cm‒2 for 40 min, and 0.04 A·cm‒2 for …

Tin, Silver, And Copper Sulfate Compound Extraction From Lead-Free Solder Dross By Reduction With Petroleum Coke, Electrorefining, Cementation, And Crystallization Process, Sakhob Khumkoa, Natthicha Ma-Ud, Tapany Patcharawit, Tanongsak Yingnakorn

Journal of Metals, Materials and Minerals

Solder dross, a waste by-product from the electronic component dipping bath, contains significant quantities of valuable metals. This study presents a four-step process for recovering tin, silver, and copper from lead-free Sn-Ag-Cu solder dross. The process involves the initial reduction of the dross using petroleum coke to produce an anode plate, followed by electrorefining to extract tin from the anode plate. Selective leaching of silver and copper from the residual anode slime and cementation techniques are employed to recover silver powder. The rest of the copper solution was used to synthesize copper sulfate crystals. Experimental results demonstrate optimal conditions for …

Optimization Of Ultrasound-Assisted Anthocyanin Extraction From Agricultural Waste Purple Corn Silk For Multifunctional Hemp Finishes, Benjamas Klaykruayat, Nattaya Vuthiganond, Pisutsaran Chitichotpanya

Journal of Metals, Materials and Minerals

The utilization of agricultural wastes for textile dyeing has gained popularity due to their safe and environmentally friendly properties, as well as the resource sustainability. Natural dye extraction is usually achieved through solvent extraction, which is time-consuming, requires a lot of solvent, and degrades desired compounds at high temperatures. Thus, this study investigated ultrasound-assisted anthocyanin extraction from agricultural waste purple corn silk as natural functional colorants for hemp finishes, given the numerous health benefits associated with anthocyanin. In order to optimize the extraction processes and evaluate the synergistic impact of these conditions, response surface methodology was implemented. The optimum conditions …

Controlling Titanium Incorporation In Hydrogenated Amorphous Carbon Films Via Closed-Loop Feedback In Reactive High Power Impulse Magnetron Sputtering, Pornthip Ratchayotee, Artit Chingsungnoen, Phitsanu Poolcharuansin

Journal of Metals, Materials and Minerals

A closed-loop feedback approach has been developed to control titanium incorporation in hydrogenated amorphous carbon (a-C:H) films during reactive high-power impulse magnetron sputtering (R-HiPIMS). The average discharge current measured at the magnetron target is used as the primary feedback signal to regulate the target coverage state. Hence, the titanium concentration in the films can be controlled. Significant changes were observed in the film microstructure and properties as the target state evolved with increasing target coverage. This causes the film transition from metallic titanium to a-C:H films with decreasing titanium concentration. For example, the XRD and Raman analyses indicated a microstructural …

In-Situ Embedding Of Nanocylindrical Bi25feo40 Into Scaffold-C3n4 For Enhanced Z-Scheme Photocatalytic Degradation, Yile Wang, Yuhui Ma, Liang Chu, Xing'ao Li

Journal of Metals, Materials and Minerals

The development of Z-scheme heterojunctions has emerged as an effective approach for boosting the photocatalytic activity. Herein, we fabricated of a direct Z-scheme heterojunction between scaffold-like C3N4 and nanocylindrical Bi25FeO40, which exhibits enhanced photocatalytic activity and dye adsorption capacity. The in-situ embedding of Bi25FeO40 within scaffold C3N4 promotes photogenerated carrier separation, leading to an optimized degradation rate of 0.0205 min−1 and a contaminant removal efficiency of 85.3%. This work paves a new path for the development of high-efficiency photocatalytic degradation.

Investigated The Ion Energy And The Microstructure Properties Of Tetrahedral Amorphous Carbon Film Produced By Pulsed Filtered Cathodic Vacuum Arc Combined With Plasma Biasing Technique, Nopphon Saowiang, Phitsanu Poolcharuansin, Artit Chingsungnoen, Nitisak Pasaja

Journal of Metals, Materials and Minerals

The purpose of this work is to demonstrate that operations using the plasma biasing technique in pulsed filtered cathodic vacuum arc (PFCVA) enable an energy-enhanced in deposition process for the high quality of tetrahedral amorphous carbon (ta-C) thin films (high sp3 content, denser, and very low surface roughness). The effect of anode bias potential on the energy distribution function of C+ ions, including the topography, microstructure, chemical state, and density of ta-C films, was systematically investigated. It was found that the plasma biasing technique can increase the average energy of C+ ions, but nevertheless, the ion …

Single Electrode Mode Triboelectric Nanogenerator For Recognition Of Animal Sounds, Archana Panda, Kunal Kumar Das, Kushal Ruthvik Kaja, Mohamed Belal, Basanta Kumar Panigrahi

Journal of Metals, Materials and Minerals

This research presents an innovative and sustainable solution by designing triboelectric nanogenerators (TENGs) for energy harvesting. The fabrication process of TENGs includes PDMS and aluminum. The two single electrode mode TENG was designed one is plain PDMS/Al and the other is porous PDMS/Al TENG devices. The porous PDMS/Al TENG device generated a voltage and current of 7 V and 5 nA for 2 cm ´ 2 cm device area. Moreover, the TENG system was employed to successfully charge capacitors, and recognize various animal sounds. This study underscores the promising potential of harvesting energy from body movements and powering of devices, …

Photoluminescent Carbon Nanodots For Artificial Photosynthesis, Rajie A. Medina, Michael E. Franco, Lyn Marie De Juan-Corpuz, Ryan D. Corpuz

Journal of Metals, Materials and Minerals

The emerging field of carbon dots (CDs), a type of carbon nanostructure that has gained significant attention due to its unique properties and potential applications. CDs possess remarkable attributes, including photoluminescence, electrochemical potential, compatibility with living organisms, solubility in water, chemical stability, and versatile surface properties. The chemical structure, particle size, and surface functionalities of CDs all have an impact on their photoluminescent properties, which are the focus of this review. The photoluminescence mechanism in CDs is discussed, highlighting their amorphous structure, and comparing them to graphene quantum dots. The paper delves into the application of CDs in artificial photosynthesis, …

Composition-Driven Phase Coexistence And Functional Properties Of The (1-X)Bzt-(X)Bct Ceramics Near The Phase Convergence Region, Jirapa Tangsritrakul, Chumpon Wichittanakom, Chatree Saiyasombat

Journal of Metals, Materials and Minerals

The concept of composition-induced phase transformation in Lead Zirconate Titanate (PZT) at the Morphotropic Phase Boundary (MPB) has been employed to improve functional properties of the (1-x)BZT-(x)BCT ceramic. However, it was observed that the phase diagram of the (1-x)BZT-(x)BCT ceramic is different to the PZT. As a result, the nature of the superior functional properties found in (1-x)BZT-(x)BCT ceramic is unlike PZT and still unclear so far. In this work, functional properties; dielectric, ferroelectric, energy storage, and piezoelectric properties, of the (1-x)BZT-(x)BCT ceramics where x = 0.3 mol% to 0.6 mol% were evaluated at room temperature in comparison to the …

Lldpe Film Development Surface With Nucleating Agents To Reduce Fat Stains From Food Adherence On The Film Surface For Easy Rinsing Before Recycling, Nattapong Pinpru, Chiranicha Ninthap, Supang Sripraphot, Supharada Khaisaat

Journal of Metals, Materials and Minerals

The purpose of this research was to enhance the surface of linear low-density polyethylene (LLDPE) film by using single and hybrid nucleating agents to reduce fat stains from food adherence on the film surface for easy rinsing before recycling, consequently reducing energy consumption before recycling. The process begins with the preparation of a high-concentration masterbatch of LLDPE with nucleating agents and polyethylene glycol (PEG), followed by blown film and test analysis. The results showed that both single and hybrid nucleating agents resulted in substantial modifications in the surface characteristics of the film. The altered surface texture of the film makes …

Fast Microwave Synthesis Of High-Silica Natural Soil Based Porous Geopolymer, Naritsara Toobpeng, Sirithan Jiemsirilers

Journal of Metals, Materials and Minerals

This study describes a simple microwave process for fabricating porous geopolymer-polymer based Shirasu soil. The porous geopolymer samples were synthesized using sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solution as alkaline solution in range of 0.5 M to 9 M. After mixing process, the geopolymer slurry was heated and stimulated geopolymerization reaction by different microwave powers at 200 W, 500 W and 700 W for 30 s, 60 s, 90 s and 120 s. The influence of NaOH concentration, microwave powers and heating times on the apparent bulk density, the water adsorption was focused. Results showed that the microwave powers …

Investigating The High-Impact Deformation Behavior Of Induced-Nano Precipitation Hardened In718 Alloy, Harrison Okechukwu Onovo, Muideen Adebayo Bodude, David Ehigie Esezobor, Thaddeus Tochukwu Akano

Journal of Metals, Materials and Minerals

Superalloys are the preferred materials for modern high-rotational complex components due to their exceptional ability to maintain critical properties such as strength, oxidation/corrosion resistance, even under extreme temperatures and dynamic impacts. This study investigates the dynamic impact response of nanoprecipitation-hardened 718 alloy (NPH-718 alloy) under various loading conditions. The wrought nickel-based NPH-718 alloy was transformed into a nanostructured state through a precise heat treatment process involving controlled cooling rates (28℃∙s‒1 to 30℃∙s‒1). A mechanical compression test, leading to failure, was employed to assess the alloy's ability to withstand dynamic impacts. The compressive dynamic behavior of the alloy at high strain …

Atmospheric Hydrochloric And Nitric Acid Leaching Of A Limonite Ore From The Wolo Mine Area, Southeast Sulawesi, Indonesia, Sufriadin -, Malyanus Yepta, Irzal Nur, Purwanto -, Rizky Amalia, Ulva Ria Irfan, Djabal Nur Basir, Tsubasa Otake

Journal of Metals, Materials and Minerals

The atmospheric acid leaching studies of a limonite ore sample from the Wolo mine area, Southeast Sulawesi, Indonesia, have been performed using hydrochloric acid (HCl) and nitric acid (HNO3). The objectives of these studies were to compare the leaching degree of metals (Ni, Co, Fe, and Al) and to analyze the dissolution behavior of minerals under different acid concentrations. Mineralogical characterization of the ore sample was conducted using optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction, whereas chemical composition was determined by X-ray fluorescence (XRF) spectrometry and atomic absorption spectroscopy (AAS), respectively. An atmospheric leaching test was done with …

In Vitro And Vivo Biocompatibility And Degradability Of Low-Alloyed Mg-Zn-Ca-Mgo Composite As Bone Repair Biomaterials, Shuquan Zhang, Jiangtao Feng, Chaokun Tang, Ran Pang, Xinglong Zhang, Chenguang Li, Weihao Zhang, Fengxin Zhou, Feng Xue, Shaoyuan Lyu, Minfang Chen, Hao Wang

Journal of Metals, Materials and Minerals

Magnesium alloys have gained attention as biodegradable bone repair biomaterials. Unlike non-biodegradable materials like titanium and tantalum, biodegradable implants offer advantages in promoting bone healing and minimizing chronic inflammatory reactions. However, the impact of the implant's degradation on the osteogenic environment remains a concern. The Mg-Zn-Ca-MgO composite, being biocompatible and containing osteogenic ions, is a promising candidate. This study assesses the degradability and in vitro/in vivo biocompatibility of two Mg-Zn-Ca-MgO composites with varying degradation rates. The Mg-1Zn-0.2Ca-1.0MgO composite was prepared, and leaching solutions were created following standard protocols. MC3T3-E1 cell cultures were conducted to assess cell toxicity, alkaline phosphatase (ALP) …

Wear Behavior Of In-Situ Oxide Dispersion Strengthened Fe-8ni Alloy With Zr Additions, Mustafa Tekin, Faiz Muhaffel, Hasan Kotan, Murat Baydoğan

Journal of Metals, Materials and Minerals

In this study, in-situ oxide dispersion strengthened (ODS) Fe91Ni8Zr1 and Fe88Ni8Zr4 alloys were produced by combination of high energy mechanical alloying (HEMA) and high temperature equal channel angular extrusion (HT-ECAE). The wear behaviors of the consolidated samples were investigated under different loads from 1 N to 4 N by reciprocating wear tests at room temperature. The Scanning electron microscopy (SEM) was used to examine the wear tracks to analyze the wear characteristics as a function of applied loads. The relative comparison of the wear results showed that under the lower loads of 1 N and 2 N, Fe88Ni8Zr4 alloy has …

Examination Of The Adhesion Of The Scale Formed On Hot-Rolled Steel With Different Silicon Content Using A Tensile Test, Seksan Singthanu, Prayoon Surin, Thanasak Nilsonthi, Manop Pipatthattakul

Journal of Metals, Materials and Minerals

In the hot-rolling process, steel was subjected to high temperatures which results in the formation of an oxide layer called scale. The oxide scale can be affected to the surface characteristic of the hot-rolled steel product. The scale must be completely removed from the surface of the steel before further processing. This research aimed to examine the adhesion behavior of scale on hot-rolled steel with different silicon contents (0.01, 0.12, 0.18, and 0.29 wt%) using a tensile testing machine with an observation setup. The results showed that the scale thickness decreased with increasing silicon content in the range of 9 …

Corrosion Of A Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy In 3.5% Nacl Solution, Mudassir Farooq, Sohail Muhammad, A. A. Sorour

Journal of Metals, Materials and Minerals

In this study, the corrosion behavior of a Fe-Cr-Mo-B-C alloy, fabricated by spark plasma sintering of an amorphous alloy powder, in 3.5% NaCl solution was analyzed. Electrochemical impedance spectroscopy and potentiodynamic polarization are techniques which were used for electrochemical performance estimation of samples and the results were further compared with conventional alloys: 1080 carbon steel and 304 stainless steel. Corrosion surface products were characterized through Scanning electron microscopy, Energy dispersive x-ray spectroscopy and X-ray photoelectron spectroscopy. Specimens sintered at 800℃ (S1-800) had achieved 94% densification approximately while the sample sintered at 900℃ (S2-900), had densified more which was 98% approximately. …

Synthesis Of Zircon Pigments From Rice Husk Ash And Their Performance In Ceramic Glaze, Niti Yongvanich, Peerapat Soysom, Worachet Ratkasemsak

Journal of Metals, Materials and Minerals

ZrSiO4-based pigments have been known to be very stable in ceramic glazes but require a high firing temperature required for phase formation. This study examined the feasibility of using rice husk waste as a substitute for crystalline SiO2. The amorphous form of silica with some impurities was obtained by calcining the rice husk at 800℃. The general chemical formula were (Zr0.9M0.1)SiO4, where M = V, Pr, Fe and Cr. The solid-state processing was achieved by firing at 1300℃ for 12 h with NaF (5 wt%). X-ray Diffraction revealed a lower relative fraction between ZrO2 (secondary phase) and ZrSiO4 in the …

Investigation Of Surface Hardness And Roughness On Formability Of Aluminum Alloy Sheet Aa2024-T3 Subjected To The Shot Peening Process By Silica Shots, Jurarat Sawangpan, Sansot Panich, Tanakorn Jantarasricha, Anak Khantachawana

Journal of Metals, Materials and Minerals

Shot peening is one type of modified surface treatment that produces a residual compressive stress on the material subsurface and improves surface properties while generating plastic deformation on the surface. This research work aims to improve surface properties, which include the enhanced material formability of aluminum alloy 2024-T3 sheet having 1.2 mm of thickness, by providing residual compressive stress on the surface using the shot peening process, which uses silica particles of 0.1 mm in diameter. First, shot peening was performed using various process parameters: compressed air, distance from nozzle to target, and duration time. Based on the obtained peening …

Development Of Inexpensive Device For Methanol Detection In Hand Sanitizer Gel Using Manganese-Doped Zinc Sulfide Quantum Dots Modified By N-Methylpolypyrrole, Sophanat Khenthaphak, Pakorn Juleang, Wanida Wonsawat, Orawon Chailapakul, Eakkasit Punrat

Journal of Metals, Materials and Minerals

A method for methanol detection by an inexpensive device using a nanomaterial modified by N-methylpolypyrrole (NMPPY) has been developed. Manganese-doped zinc sulfide quantum dots (Mn/ZnS-QDs) were synthesized and then characterized by a fluorescence spectrophotometer to study their spectroscopic properties. Mn/ZnS-QDs were modified with NMPPy and studied by digital-image colorimetry to optimize conditions for methanol detection. A 2 mL of 3000 mg∙L–1 Mn/ZnS-QDs modified with 300 μL of 1000 mg∙L-1 of NMPPy was chosen to be a detecting reagent for methanol determination. Under the optimum conditions, the linear range was found to be 2%v/v to 50%v/v of methanol with R-square of …

Surface Modification Of Activated Carbon From Sago Waste, Khaeriah Dahlan, Yane Oktovina Ansanay, Alda Filadelfi Runggaweri, Marlifon Merani

Journal of Metals, Materials and Minerals

In this paper, we analyzed the effect of surface modification on the surface properties of the active carbon from sago waste using varied oxidizers, namely H2O2, HNO3, and H2SO4. The ordinary active carbon has an initial surface area of 546.6 m2∙g-1, with a phenol and carboxylic functional group. The porosity, functional groups and morphological surface, together with the chemical composition of activated carbon were examined using a nitrogen adsorption-desorption through the Brunauer Emmett Teller (BET) method and the calculation of Barret-Joyner-Hall (BJH), a Fourier-transformed infrared spectroscopy, and a scanning electron microscopy with energy dispersive spectroscopy. The results found that the …

Impact Of Microwave Synthesis Time On The Shape Of Silver Nanostructures And Their Antibacterial Activity, Nhat Hieu Hoang, Van Nghia Nguyen, Thi Tho Nguyen, Thi Mong Diep Nguyen

Journal of Metals, Materials and Minerals

Silver is a well-known effective antibacterial and disinfectant material with relatively few side effects. Nanosilver derived from it, have strong antibacterial, antifungal and broad-spectrum antiviral properties. This study describes how the microwave synthesis durations of silver nanoparticles affect their shape, and the effect of the shapes of these nanoparticles on their antibacterial activity. The optical properties of the nanosilver were examined through UV-Vis absorption spectroscopy. The morphology of the grain was determined by transmission electron microscopy (TEM), and the crystallinity of the nanosilver was confirmed by X-ray diffraction (XRD). The antibacterial activities were assessed using bacterial pathogens Bacillus cereus and …

Mechanical Behavior And Physicochemical Modifications In Lignosulfonate-Treated Fique (Furcraea Andina) Fibers, Beatriz Dantas Lourenço Da Silva, Paula Lage Agrize, Betina Carvalho Veiga, Lucio Fabio Cassiano Nascimento, Camila Aparecida Abelha Rocha, Fábio De Oliveira Braga

Journal of Metals, Materials and Minerals

One of the most frequent problems in biocomposites is the physical/chemical incompatibility between natural lignocellulosic fibers (NLF) and the matrix. Physical and/or chemical treatments are the most common approach to improve interface properties. Seeking for environmentally friendly treatments, lignosulfonates (LSs) have been considered for surface modification of NLF due to their amphiphilic properties. Thus, the objective of the present work is to evaluate the influence of sodium LS (SLS) treatment protocols in the properties and mechanical behavior of fique (Furcraea Andina) fibers. X-ray diffraction (XRD), Thermogravimetric (TGA) and spectroscopic (FTIR) analyzes were performed, as well as optical microscopy, …

Thermal And Mechanical Evaluation Of Natural Fibers Reinforced Gypsum Plaster Composite, Tugba Mutuk, Kerem Arpacioğlu, Sevim Alişir, Gökhan Demir

Journal of Metals, Materials and Minerals

Many problems such as the increase in the world population, global drought, and greenhouse gases have caused materials used in industries to be reconsidered. This is how the concept of green composite material emerged. Using natural fibers to obtain such materials is important in terms of sustainability. This study is aimed to use hemp fiber and banana fiber as natural fiber additives in the gypsum composite to produce green bio-composite. Natural fibers are chemically modified with 5% NaOH solution. In this way, a good fiber/matrix interface interaction is provided. The composite hardness test result of 5 wt% HB fiber added …

Investigation Of Oxide Scale Adhesion On Hot-Rolled Steel Using The Tensile Test And Acoustic Emission, Seksan Singthanu, Prayoon Surin, Manop Pipathattakul, Thanasak Nilsonthi

Journal of Metals, Materials and Minerals

This article addresses applying a tensile test with a CCD camera to assess scale adhesion on hot-rolled steel as a function of hot-rolled coil position. The scale adhesion in this study was shown in the value of the strain initiating the first scale spallation. The result of strain initiating the first scale spallation was confirmed with an acoustic emission (AE) method. The as-received hot-rolled coil was studied at the head, middle, and tail positions. A scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to examine the scale morphology and phase identification respectively. The results show that the oxide …

Effect Of Nano Cdo-Zno Content On Structural, Thermal, Optical, Mechanical And Electrical Properties Of Epoxy Composites, Chaitra Srikanth, Gattumane Motappa Madhu

Journal of Metals, Materials and Minerals

Cadmium oxide doped zinc oxide nanoparticles were synthesized by solution combustion technique. CdO-ZnO nanoparticles were reinforced into epoxy by ultrasonication technique. CdO-ZnO nano-particles are well known semiconducting materials which are found to exhibit excellent semiconducting behavior even at high frequencies. Hence it was introduced into epoxy to study the semiconducting nature of CdO-ZnO/epoxy composites. The polymer composites exhibited interesting phenomenon such as minimum heat losses at high frequencies indicating semi-conducting behaviour of the composites. The polymer composite was also analysed for its structural, thermal, optical and mechanical properties. The enhanced interaction of CdO-ZnO nanoparticles with epoxy has resulted in superior …

Synthesis Of Zinc Oxide Photocatalysts From Zinc-Dust Waste For Organic Dye Degradation, Wanwalee Promsuwan, Pornapa Sujaridworakun, Wuttichai Reainthippayasaku

Journal of Metals, Materials and Minerals

Zinc-dust waste from a hot-dip galvanizing plant in the metal plating industry was successfully used as the starting material to synthesize zinc oxide (ZnO) nanopowder via a hydrothermal method. Effects of acid types in zinc-dust dissolving process and concentration of NaOH for precipitation on physical characteristics and photocatalytic activity of the synthesized ZnO were investigated. Elemental composition, phase and crystallite size, morphology with chemical composition, and specific surface area of the ZnO nanostructures were characterized by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), and gas adsorption-desorption analysis, respectively. The photocatalytic performance …