Article
Engineering, Chemical
Hongjun Fang, Ying Han, Xinzhen Feng, Weijie Ji, Chak-Tong Au
Summary: The g-C3N4/Ag/AgNCO heterojunction demonstrates enhanced catalytic performance in degrading tetracycline in sewage, with improved light absorption and rapid charge separation/transport. The active species in tetracycline degradation synergistically function in the degradation process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Saule Mergenbayeva, Timur Sh. Atabaev, Stavros G. Poulopoulos
Summary: Colored Ti2O3 and Ti2O3/TiO2 catalysts were prepared by thermal treatment, and the effects of treatment temperature on their structure, morphology, and optical properties were studied. It was found that mTiO heated at 650°C exhibited the highest photocatalytic activity for the degradation of 4-tert-butylphenol (4-t-BP) under solar light irradiation. Different water constituents, including anions and humic acid, were found to either inhibit or enhance the photodegradation of 4-t-BP by mTiO-650, depending on their concentration.
Article
Green & Sustainable Science & Technology
Dong Xu, Hailing Ma
Summary: In this study, degradation of Rhodamine B in water by ultrasound-assisted TiO2 photocatalysis was investigated, and the optimal degradation conditions were determined by studying various factors. The results suggest that the ultrasound-assisted TiO2 photocatalysis method has great potential application value in the removal of organic pollution and environmental purification.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Linsong Wu, Xiaofang Pei, Mengjun Mei, Zhen Li, Shiwei Lu
Summary: This study prepared Ag-TiO2 photocatalysts with different silver contents and applied them to cement mortar. The results showed that 2% Ag-TiO2 had the highest photocatalytic activity under UV light, while 5% Ag-TiO2 had the highest photocatalytic activity under solar light. Photocatalytic mortar prepared by the spraying method exhibited high photocatalytic performance without affecting the mechanical properties of the mortar.
Article
Environmental Sciences
Josy A. Osajima, Alexandro S. Sa, Luzia M. C. Honorio, Pollyana Trigueiro, Lucas I. F. Pinto, Joziel A. Oliveira, Marcelo B. Furtini, Roosevelt D. S. Bezerra, Ana C. S. Alcantara, Edson C. Silva-Filho
Summary: This study investigated the synergistic effect of silver and gold bimetallic nanoparticles deposited on palygorskite in the presence of TiO2 for efficient photodegradation of bentazone herbicide. The best photodegradation system was found to be Au@Ag-Pal+TiO2, which showed continued effectiveness after the third cycle. The photodegradation process of bentazone exhibited toxicity against Artemia salina.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Yuqing Ren, Yao Chen, Qinyu Li, Hexing Li, Zhenfeng Bian
Summary: This study investigates the promotion effect of microwave-absorbing photocatalysts on the photocatalytic oxidation process. The results show that the thermal effect of the microwave field enhances the separation efficiency of photogenerated electrons and holes, while the athermal effect improves the light absorption rate of the catalyst and promotes the generation of reactive oxygen radicals. These findings provide a theoretical foundation for practical applications.
Article
Green & Sustainable Science & Technology
Jyoti Saroha, Ekta Rani, Meenakshi Devi, Prathap Pathi, Mahesh Kumar, Shailesh Narain Sharma
Summary: Wastewater from textile industries containing organic pollutants is a global concern, and semiconductor nanocomposites have been explored for treatment. In this study, Au/Ag-TiO2 nanocomposites were synthesized and exhibited enhanced photocatalytic activity for the degradation of organic dyes in wastewater. The enhanced activity was attributed to the broad range absorption of visible light and effective charge transfer in the Au-TiO2 nanocomposites. The research provides insights into the physics underlying the enhanced photocatalytic performance of Au-TiO2 nanocomposites for organic pollutant removal.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Xiaojun Dai, Sheng Feng, Wei Wu, Yun Zhou, Zhiwei Ye, Xun Cao, Yang Wang, Chengdeng Yang
Summary: In this study, ZnCo2S4 nanoparticles were coupled on the surface of TiO2 to form S-scheme heterojunction. ZCS/TiO2 exhibited significantly improved photocatalytic performance under simulated sunlight, with hydrogen evolution efficiency reaching 5580 mu mol.g(-1).h(-1) and apparent quantum efficiency (AQY) of 11.5% at 420 nm. The enhancement of photocatalytic performance was mainly attributed to the S-scheme heterojunction, which improved electron-hole separation and charge transfer efficiency, as well as enhanced visible light absorption. This work provides a new approach for improving the performance of photocatalytic hydrogen evolution and TC degradation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Yong-Ming Dai, Chen-Yin Li, Wei -Ho Ting, Jih-Mirn Jehng
Summary: By adjusting the mass ratio of two components, AgVO3 and TiO2 nanowires, an optimized AgVO3/Ag/TiO2 nanowires composite material is successfully fabricated. The composite material exhibits enhanced photocatalytic performance due to improved utilization of light, efficient separation and transfer of photogenerated electron-hole pairs. Additionally, the surface plasmon resonance effect of the composite material also facilitates the photocatalytic reaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Lely Ayu Ningsih, Masaaki Yoshida, Arisu Sakai, Kun-Yi Andrew Lin, Kevin C. W. Wu, Hepsiba Niruba Catherine, Tansir Ahamad, Chechia Hu
Summary: An Ag-loaded TiO2-SiO2-Fe3O4 sphere was prepared for the photo-assisted reduction of 4-NP, showing high activity and recyclability, making it a promising material for environmental remediation.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Applied
Ishaq Y. Habib, Jasmine Burhan, Fadhli Jaladi, Chee Ming Lim, A. Usman, N. T. R. N. Kumara, Shik Chi Edman Tsang, Abdul Hanif Mahadi
Summary: This study investigated the optimization of Advanced Oxidation Processes (AOPs) by examining the effect of Cr doping on CeO2 nanostructures. The results showed that Cr doping improved catalytic activity in MB degradation, with H2O2-assisted method proving more effective compared to photocatalysis. Additionally, isopropanol demonstrated potential scavenging properties towards hydroxyl radicals, indicating the MB degradation mechanism involves hydroxyl radical species.
Article
Polymer Science
Lamine Aoudjit, Hugo Salazar, Djamila Zioui, Aicha Sebti, Pedro Manuel Martins, Senentxu Lanceros-Mendez
Summary: This study synthesized round-shaped Ag@TiO2 nanocomposites with a diameter of approximately 21 nm and a bandgap energy of 2.8 eV, which demonstrated good photocatalytic activity against metronidazole (MNZ) under solar radiation. The application of an adaptive neuro-fuzzy inference system (ANFIS) successfully predicted the effect of various parameters on the photocatalytic performance of the composite membrane, showing that the 10% Ag@TiO2/PVDF-HFP composite membrane achieved 100% removal efficiency for MNZ after 5 hours of solar radiation exposure.
Article
Environmental Sciences
Davinder Kaur, Karanveer Singh, William T. T. Reynolds Jr, Bonamali Pal
Summary: Graphene oxide (GO) is a promising material in photocatalysis, adsorption, and energy storage due to its high surface area and unique layered structure. Anthracite coal is an attractive precursor for GO because it provides high concentration of sp(2) carbon, resulting in high conductivity and absorbance in the visible region. GO-TiO2 nanocomposites were prepared to enhance photocatalytic activity by facilitating electron transmission from TiO2 to GO, and Ag nanoparticles were coated on TiO2 to further boost activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yunjin Zhong, Haixiang Chen, Xiufang Chen, Bingying Zhang, Wenxing Chen, Wangyang Lu
Summary: This study developed a photocatalytic additive with high activity by compounding non-toxic TiO2 and cost-effective g-C3N4, and incorporated it into PAN to prepare a photodegradable PAN material. The results showed that the PAN chain could be almost fully degraded within 90 hours under simulated sunlight in the absence of microorganisms. The degradation mechanism involved the breaking of bonds by radicals and subsequent oxidation. This design strategy may provide new insights for the production and degradation mechanism of photodegradable polymers.
Article
Energy & Fuels
Umer Younas, Awais Ahmad, Aftab Islam, Faisal Ali, Muhammad Pervaiz, Aimon Saleem, Muhammad Waseem, Ahmed Muteb Aljuwayid, Mohamed A. Habila, Salman Raza Naqvi
Summary: In this study, a WO3/TiO2/V2O5 catalyst was synthesized and characterized for the degradation of O-NP, MB, and MO pollutants. The results showed that the synthesized nanocomposite exhibited excellent photocatalytic potential, with degradation rates of up to 76%, 86%, and 86% for MB, MO, and O-NP, respectively.
