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Articles 271 - 282 of 282
Full-Text Articles in Chemical Engineering
Spectrally-Selective Energy-Harvesting Solar Windows For Public Infrastructure Applications, Mikhail Vasiliev, Kamal Alameh, Mohammad Alam
Spectrally-Selective Energy-Harvesting Solar Windows For Public Infrastructure Applications, Mikhail Vasiliev, Kamal Alameh, Mohammad Alam
Research outputs 2014 to 2021
A study of photovoltaic solar window technologies is reported and it focuses on their structural features, functional materials, system development, and suitability for use in practical field applications including public infrastructures and agricultural installations. Energy generation performance characteristics are summarized and compared to theory-limit predictions. Working examples of pilot-trial solar window-based installations are described. We also report on achieving electric power outputs of about 25 Wp/m2 from clear and transparent large-area glass-based solar windows.
Influence Of Substrate Stage Temperature And Rotation Rate On The Magneto-Optical Quality Of Rf-Sputtered Bi2.1dy0.9fe3.9ga1.1o12 Garnet Thin Films, Mohammad E. Alam, Mikhail Vasiliev, Kamal Alameh
Influence Of Substrate Stage Temperature And Rotation Rate On The Magneto-Optical Quality Of Rf-Sputtered Bi2.1dy0.9fe3.9ga1.1o12 Garnet Thin Films, Mohammad E. Alam, Mikhail Vasiliev, Kamal Alameh
Research outputs 2014 to 2021
Highly bismuth-substituted iron garnet thin films are prepared on quartz substrates by using a radio frequency (RF) magnetron sputtering technique. We study the factors (process parameters associated with the RF magnetron sputter deposition technique) affecting the magneto-optical (MO) properties of ferrite garnet films of composition Bi2.1Dy0.9Fe3.9Ga1.1O12. All films show high MO response across the visible range of wavelengths after being annealed. In particular, the effects of substrate stage temperature and rotation rate on the various properties of films are studied. Experimental results reveal that the characteristics of garnet films of this type can be tuned and optimized for use in …
Ultrafast Consolidation Of Bulk Nanocrystalline Titanium Alloy Through Ultrasonic Vibration, Peng Chen, W. B. Liao, Lehua Liu, F Luo, Xiaoyu Wu, Peijie Li, C Yang, M Yan, Y. J. Liu, Laichang Zhang, Zhiyuan Liu
Ultrafast Consolidation Of Bulk Nanocrystalline Titanium Alloy Through Ultrasonic Vibration, Peng Chen, W. B. Liao, Lehua Liu, F Luo, Xiaoyu Wu, Peijie Li, C Yang, M Yan, Y. J. Liu, Laichang Zhang, Zhiyuan Liu
Research outputs 2014 to 2021
Nanocrystalline (NC) materials have fascinating physical and chemical properties, thereby they exhibit great prospects in academic and industrial fields. Highly efficient approaches for fabricating bulk NC materials have been pursued extensively over past decades. However, the instability of nanograin, which is sensitive to processing parameters (such as temperature and time), is always a challenging issue to be solved and remains to date. Herein, we report an ultrafast nanostructuring strategy, namely ultrasonic vibration consolidation (UVC). The strategy utilizes internal friction heat, generated from mutually rubbing between Ti-based metallic glass powders, to heat the glassy alloy rapidly through its supercooled liquid regime, …
Excellent Performance Of Fe78si9b13 Metallic Glass For Activating Peroxymonosulfate In Degradation Of Naphthol Green B, Xue-Fen Li, Shun-Xing Liang, Xiao-Wang Xi, Zhe Jia, Shi-Kun Xie, He-Chun Lin, Jun-Ping Hu, Laichang Zhang
Excellent Performance Of Fe78si9b13 Metallic Glass For Activating Peroxymonosulfate In Degradation Of Naphthol Green B, Xue-Fen Li, Shun-Xing Liang, Xiao-Wang Xi, Zhe Jia, Shi-Kun Xie, He-Chun Lin, Jun-Ping Hu, Laichang Zhang
Research outputs 2014 to 2021
The functional application of metallic glasses in the catalytic field has widely attracted research attention due to its unique atomic structure compared to crystalline materials. It has been reported that metallic glasses can effectively activate H2O2 and persulfate, yet the activation of peroxymonosulfate by metallic glasses is not studied well. In this work, the metallic glass with atomic composition of Fe78Si9B13 was applied for investigating the peroxymonosulfate (PMS) activation on degradation of naphthol green B (NGB) dye. The change of surface morphology indicated the important role of oxide films during the dye …
Corrosion Behaviour Of Selective Laser Melted Ti-Tib Biocomposite In Simulated Body Fluid, Yang Chen, Junxi Zhang, Nianwei Dai, Peng Qin, Hooyar Attar, Laichang Zhang
Corrosion Behaviour Of Selective Laser Melted Ti-Tib Biocomposite In Simulated Body Fluid, Yang Chen, Junxi Zhang, Nianwei Dai, Peng Qin, Hooyar Attar, Laichang Zhang
Research outputs 2014 to 2021
The corrosion behaviour of CP-Ti and Ti-TiB composite produced by selective laser melting (SLM) in the artificial simulated body fluid (Hank's solution) at body temperature was investigated systematically by using electrochemical measurements (potentiodynamic polarisation curves and electrochemical impedance spectroscopy), together with some detailed structural characterisations. The results demonstrate that SLM-produced Ti-TiB composite samples possess better corrosion resistance than SLM-produced CP-Ti samples in Hank's solution. Due to these tiny TiB and TiB2 particles acting as the micro-cathode uniformly distributing in titanium matrix, anodic dissolution of titanium matrix in the corrosion process is prominently facilitated in early stages, followed by rapid …
A Novel Approach For The Preparation Of Nanosized Gd2o3 Structure: The Influence Of Surface Force On The Morphology Of Ball Milled Particles, Ly B. T. La, Yee-Kwong Leong, Harry P. Watts, Pek-Ing Watts, Kevin Hayward, Laichang Zhang
A Novel Approach For The Preparation Of Nanosized Gd2o3 Structure: The Influence Of Surface Force On The Morphology Of Ball Milled Particles, Ly B. T. La, Yee-Kwong Leong, Harry P. Watts, Pek-Ing Watts, Kevin Hayward, Laichang Zhang
Research outputs 2014 to 2021
This work investigates the effect of inter-particle forces arising from adsorbed typical cationic and anionic surfactants on the morphology of ball milled gadolinium oxide (Gd2O3). The experimental outcomes are interpreted in terms of stabilization and interaction mechanisms of fine washed Gd2O3 particles (size diameter <1 μm) in aqueous medium under the variation of surface forces arising of adsorbed surfactant. After ball milling and washing, the point of zero charge or isoelectric point (IEP) of Gd2O3 particles suspension is at pH 11 where its maximum yield stress is observed. Because of hydrophobic interaction, the maximum yield stress increases by 30 times by adsorbed sodium dodecyl sulfate (SDS) and its IEP shifts slightly to a lower pH. By cetyl trimethyl ammonium bromide (CTAB), …
Floating Constructed Wetland For The Treatment Of Polluted River Water: A Pilot Scale Study On Seasonal Variation And Shock Load, Tanveer Saeed, Biprojit Paul, Rumana Afrin,, Abdullah Al-Muyeed, Guangzhi Sun
Floating Constructed Wetland For The Treatment Of Polluted River Water: A Pilot Scale Study On Seasonal Variation And Shock Load, Tanveer Saeed, Biprojit Paul, Rumana Afrin,, Abdullah Al-Muyeed, Guangzhi Sun
Research outputs 2014 to 2021
This paper reports the performance of a pilot scale floating constructed wetland (FCW), employed for the treatment of polluted water collected from Buriganga river in Bangladesh. The FCW system included a tank for accommodating collected water and a floating mat with media, to support the growth of two macrophyte species Phragmites australis and Canna indica. Mean mass removal rates of 0.66, 0.76, 0.08, 0.51, 2.49g/m2d were achieved for ammoniacal nitrogen (NH4-N), total inorganic nitrogen (TIN), phosphorus (P), biochemical oxygen demand (BOD), chemical oxygen demand (COD), respectively by the FCW. Nitrogen removal was via nitrification-denitrification processes, whereas filtration-sedimentation appeared to influence …
X-Ray Protection, Surface Chemistry And Rheology Of Ball-Milled Submicron Gd2o3 Aqueous Suspension, Ly B. T. La, Yee-Kwong Leong, Christopher Leatherday, Pek I. Au, Kevin Hayward, Laichang Zhang
X-Ray Protection, Surface Chemistry And Rheology Of Ball-Milled Submicron Gd2o3 Aqueous Suspension, Ly B. T. La, Yee-Kwong Leong, Christopher Leatherday, Pek I. Au, Kevin Hayward, Laichang Zhang
Research outputs 2014 to 2021
X-ray protective garments are typically comprised of lead-based materials, which are toxic to both people and the environment. Developing alternative lightweight radiation shielding materials is a priority for protecting people working with radiation. Gadolinium, with an electron configuration typical of radiation shielding elements, is proposed as a non-toxic replacement for lead. This study provides new insights into the potential for a gadolinium suspension for replacing lead and proposes an inexpensive and effective preparation method. Submicron gadolinium oxide (Gd2O3) was generated using a cost effective ball milling method involving addition of NaCl. Then, the dispersed-flocculated behaviour of …
A New Insight Into High-Strength Ti62nb12.2fe13.6co6.4al5.8 Alloys With Bimodal Microstructure Fabricated By Semi-Solid Sintering, Lehua Liu, Chao Yang, L.M Kang, Shengguan Qu, Xiaoquiang Li, Weiwen Zhang, Weiping Chen, Yuanyuan Li, Peijie Li, Laichang Zhang
A New Insight Into High-Strength Ti62nb12.2fe13.6co6.4al5.8 Alloys With Bimodal Microstructure Fabricated By Semi-Solid Sintering, Lehua Liu, Chao Yang, L.M Kang, Shengguan Qu, Xiaoquiang Li, Weiwen Zhang, Weiping Chen, Yuanyuan Li, Peijie Li, Laichang Zhang
Research outputs 2014 to 2021
It is well known that semi-solid forming could only obtain coarse-grained microstructure in a few alloy systems with a low melting point, such as aluminum and magnesium alloys. This work presents that semi-solid forming could also produce novel bimodal microstructure composed of nanostructured matrix and micro-sized (CoFe)Ti2 twins in a titanium alloy, Ti62Nb12.2Fe13.6Co6.4Al5.8. The semi-solid sintering induced by eutectic transformation to form a bimodal microstructure in Ti62Nb12.2Fe13.6Co6.4Al5.8 alloy is a fundamentally different approach from other known methods. The fabricated alloy …
Phase Transformation And Deformation Behavior Of Niti-Nb Eutectic Joined Niti Wires, Liqiang Wang, Cong Wang, Laichang Zhang, Liangyu Chen, Weijie Lu, Di Zhang
Phase Transformation And Deformation Behavior Of Niti-Nb Eutectic Joined Niti Wires, Liqiang Wang, Cong Wang, Laichang Zhang, Liangyu Chen, Weijie Lu, Di Zhang
Research outputs 2014 to 2021
NiTi wires were brazed together via eutectic reaction between NiTi and Nb powder deposited at the wire contact region. Phase transformation and deformation behavior of the NiTi-Nb eutectic microstructure were investigated using transmission electron microscopy (TEM) and cyclic loading-unloading tests. Results show that R phase and B19′ martensite transformation are induced by plastic deformation. R phase transformation, which significantly contributes to superelasticity, preferentially occurs at the interfaces between NiTi and eutectic region. Round-shaped Nb-rich phase with rod-like and lamellar-type eutectics are observed in eutectic regions. These phases appear to affect the deformation behavior of the brazed NiTi-Nb region via five …
A Fast Approach For Preparation Of Adsorbent From Reed Black Liquor And Its Performance In Equilibrium And Kinetic Gas Separation, G. Yang, Yong Sun, C. Wen, J. Zhang
A Fast Approach For Preparation Of Adsorbent From Reed Black Liquor And Its Performance In Equilibrium And Kinetic Gas Separation, G. Yang, Yong Sun, C. Wen, J. Zhang
Research outputs 2014 to 2021
A new approach using reed pulping black liquor by hydrothermal reaction followed by fast carbonization at 350 °C in fluidized bed reactor for 5 minutes was proposed in this paper. The BET specific surface area generated at optimum conditions reached 390 m2 g–1. The CO2 selectivity over CH4 and N2 comparable to commercial activated carbons was obtained. The isosteric enthalpies of adsorption for CO2, CH4 and N2 on the resultant carbon sample prepared at optimum conditions show surface heterogeneity. The kinetic results indicate its potential for separation of carbon dioxide from carbon dioxide/methane mixture.
Investigation And Characterisation Of Growth Phases Of Polycrystalline Cadmium Sulfide Thin Films Produced By The Chemical Bath Deposition Method, Peter Duncan
Theses : Honours
This research project investigates the characterisation and morphology of the growth phases of polycrystalline CdS thin films that were created using the Chemical Bath Deposition (CBD) method. One batch of CdS thin films was created by the author (group B) whilst another batch (group A) was obtained from a previous research project. In both cases, the experiments were designed such that successive slides in a set represent successive phases in the growth of these CdS thin films. Therefor analysis of the near surface for all slides in a set gave an accurate representation of conditions on the surface at the …