Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
The Role Of Some Metal Ions In Enhancement Of Photocatalytic Activity Of Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$Binary Oxide, Eda Sinirtaş İlkme, Güli̇n Selda Pozan Soylu
The Role Of Some Metal Ions In Enhancement Of Photocatalytic Activity Of Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$Binary Oxide, Eda Sinirtaş İlkme, Güli̇n Selda Pozan Soylu
Turkish Journal of Chemistry
Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$ mixed oxides were synthesized with solid-state dispersion (SSD) and coprecipitation methods. In addition, transition metal oxides such as CuO, NiO, and Co$_{3}$O$_{4}$ were successfully loaded on the synthesized catalyst (Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$) using the SSD method. The composite catalysts were inspected for their photocatalytic activities in degrading 2,4-dichlorophenol under UV light enforcement. The produced samples were analyzed using X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, scanning electron microscopy, photoluminescence, and the Brunauer-Emmett- Teller method. The addition of transition metal oxides improved the photocatalytic activity of Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$5 (SSD). 1CuO wt% Fe$_{2}$O$_{3}$-V$_{2}$O$_{5}$ exhibited the highest percentage of 2,4-dichlorophenol …
Fabrication And Characterization Of Amidoxime-Functionalized Silica Decorated Withcopper: A Catalytic Assembly For Rapid Reduction Of Dyes, Ijaz Ahmed Khan, Muhammad Inaam-Ul-Hassan, Hazrat Hussain, Syed Mujtaba Shah, Tariq Yasin
Fabrication And Characterization Of Amidoxime-Functionalized Silica Decorated Withcopper: A Catalytic Assembly For Rapid Reduction Of Dyes, Ijaz Ahmed Khan, Muhammad Inaam-Ul-Hassan, Hazrat Hussain, Syed Mujtaba Shah, Tariq Yasin
Turkish Journal of Chemistry
In this study, amidoxime-functionalized silica decorated with copper (AFS-Cu) was fabricated and tested for its catalytic application. Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were employed to characterize its structure and morphology. The application of AFS-Cu as a catalyst for the catalytic reduction of methylene blue (MB) in aqueous media using NaBH$_{4}$ as reductant was evaluated. The ability to reuse as well as the effect of catalyst dose and pH of solution on the catalytic activity was investigated. The reduction of MB followed pseudo-first-order kinetics and the rate constant (k) was 0.6224 min$^{-1}$. …
Quercetin Enhances Vitamin D2 Stability And Mitigate The Degradation Influenced By Elevated Temperature And Ph Value, Sukkum Ngullie Chang, Jeong Jun Lee, Hyun Jin Kim, Sun Chul Kang
Quercetin Enhances Vitamin D2 Stability And Mitigate The Degradation Influenced By Elevated Temperature And Ph Value, Sukkum Ngullie Chang, Jeong Jun Lee, Hyun Jin Kim, Sun Chul Kang
Turkish Journal of Chemistry
Vitamin D2 (vit. D2) is a nutraceutical essentially needed for good health. However, it is susceptible to oxygen and high temperature. The use of natural products such as bioflavonoids possessing anti-degradative effect of vit. D2 degradation has not been described before. A combinational effect of vit. D2 with quercetin showed a positive effect and inhibited vit. D2 degradation when exposed to high temperature (50 oC and 75 oC) at different time points. The results obtained revealed vit. D2 degradation was drastically increased with longer incubation under thermal treatment. However, quercetin and vit. D2 groups were able to significantly inhibit the …
Photocatalytic Decomposition Of Textile Dyestuffs By Photosensitive Metal Oxide Catalysts, Esra Yeli̇z Altun, Zehra Tuba Şi̇şmanoğlu, Güli̇n Selda Pozan Soylu
Photocatalytic Decomposition Of Textile Dyestuffs By Photosensitive Metal Oxide Catalysts, Esra Yeli̇z Altun, Zehra Tuba Şi̇şmanoğlu, Güli̇n Selda Pozan Soylu
Turkish Journal of Chemistry
Textile azo dyes are one of the pollutants in waste water that adversely affect human and environmental health. Removal of these chemicals from wastewater is important for eco-system and human health. In this study, Bi2O3 nanoflakes and ZnO were synthesized by the co-precipitation method. Adsorption and photocatalytic degradation reactions were carried out to remove dyes (Victoria blue (VB) and Malachite green (MG)) from wastewater with the photocatalysts. In order to improve the activity of catalysts, cetyltrimethylammoniumbromide (CTAB) was added as a surfactant to pure oxide structures, and Bi2O3-CTAB and ZnO-CTAB catalysts were prepared. The structural and morphological properties of these …