Article
Environmental Sciences
Almudena Aguinaco, Beatriz Amaya, Milagrosa Ramirez-del-Solar
Summary: Fe3+-TiO2 thin films were successfully prepared using a sandwich approach, and their structural, morphological, optical, and photocatalytic properties were studied. The incorporation of Fe3+ altered the material properties to enhance photocatalytic activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jianan Cheng, Xuelei Peng, Fang Li, Guobao Li, Mingming Yao
Summary: In this study, Ag/Co/B tri-doped TiO2/SiO2 film was prepared by the sol-gel method, and its structure and properties were characterized. The film showed excellent thermal stability, larger specific surface area, and smaller grain size compared to pure TiO2 film. The combination of SiO2 adsorption capacity and the Schottky barrier formed by Ag and TiO2 improved the photocatalytic performance and optical absorption efficiency. UV-vis DRS analysis revealed a lower band gap energy for the film due to Co and B ions doping. The film exhibited excellent photocatalytic degradation ability and stability against different organic pollutants.
FUNCTIONAL MATERIALS LETTERS
(2022)
Article
Chemistry, Physical
Yanqiang Bu, Li Zhang, Dewei Ma, Fei Zhuge
Summary: A simple low-temperature hot-water treatment method was used to synthesize Fe-N co-doped anatase nanocrystals, which were dispersed in a SiO2 host film for the first time. The Fe-N co-doped TiO2-SiO2 film showed stable photocatalytic activity with a high NO removal efficiency. The FNTS film exhibited superior charge separation capabilities and the presence of key radicals for NO removal was confirmed through ESR analysis. Additionally, the FNTS thin films displayed long-lasting super-hydrophilicity and self-cleaning properties, making them a promising candidate for practical applications.
Article
Physics, Multidisciplinary
Samira Mohammad Darvish, Amir Ali Masoudi, Abdollah Mortezaali, Zahra Sadat Hosseini
Summary: This study focuses on the preparation of silicon dioxide-titanium dioxide (SiO2-TiO2) thin films with different thicknesses using a dip-coating method. The aim is to improve the photocatalytic and hydrophilicity properties of the film by optimizing the thickness. The results show that increasing the thickness leads to higher surface roughness and a decrease in band gap, making the film more suitable for photocatalytic activity in visible light. The presence of defects in the 336 nm thick film also contributes to the improved charge carrier separation. XPS analysis is used to determine the chemical composition and the main parameters affecting photocatalytic performance, such as defect concentrations, grain boundaries, and surface roughness. The 336 nm thick film exhibits the highest photodegradation rate under visible light. This research provides valuable insights into the structural and optical properties of SiO2-TiO2 thin films for enhanced photocatalytic activity in the visible light region.
Article
Chemistry, Physical
Mohamed Esmat, Hamza El-Hosainy, Rafat Tahawy, Wipakorn Jevasuwan, Nao Tsunoji, Naoki Fukata, Yusuke Ide
Summary: Introducing oxygen vacancies (Vo) into TiO2 photocatalyst along with N doping is proposed as an alternative strategy for achieving efficient co-catalyst-free solar photocatalytic activity under less extreme conditions. The synthesized material exhibits good co-catalyst-free solar photocatalytic activity for hydrogen evolution via water splitting under irradiation with simulated solar light, showing higher efficiency compared to typical co-catalyst-free defective TiO2 materials. The introduced Vo is believed to play a role in facilitating charge separation and improving photocatalytic efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Paper & Wood
Y. H. Yoon, S. Y. Lee, J. G. Gwon, E. Vijayakumar, H. G. Lee, W. H. Lee
Summary: The effects of CNC templating and TM doping on the preparation and photocatalytic activity of TiO2 films were investigated. CNC-templated TiO2 films exhibit superior physical and crystalline properties compared to pure TiO2 films, while TM doping enhances the photocatalytic efficiency, especially with high valence cations. The study demonstrates the potential of using CNC templates and TM doping to improve TiO2 films for various applications.
Article
Chemistry, Applied
Petr D. Murzin, A. A. Murashkina, A. V. Emeline, D. W. Bahnemann
Summary: Increasing vanadium content leads to simultaneous increase in V(4+) and Ti(3+) concentrations, as well as stronger visible light absorption in co-doped samples. The dependency of photocatalytic activity on co-dopant ratio shows a volcano plot behavior, while work function is negatively correlated with photocatalytic activity, with an optimal Sc/V ratio of 75/25.
TOPICS IN CATALYSIS
(2021)
Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Multidisciplinary
Haichun Xiang, Biyang Tuo, Jinwang Tian, Keming Hu, Jianli Wang, Jiangguo Cheng, Yun Tang
Summary: In this study, Bi-doped TiO2/montmorillonite composites were prepared using the sol-gel method to enhance the photocatalytic treatment of dye wastewater. The results showed that the doping of Bi3+ ions effectively inhibited the recombination of electron-hole pairs, leading to a significant improvement in photocatalytic activity. The highest degradation extent of rhodamine B reached 90.60% under visible-light irradiation when the molar ratio of Bi:Ti was 7%.
Article
Chemistry, Physical
Febio Dalanta, Tutuk Djoko Kusworo, Nita Aryanti
Summary: This study demonstrated that Co-doped TiO2 @SiO2 photocatalyst can enhance the photo-sensitivity and photocatalytic activity of the composite, improving the membrane performance significantly, showing great potential for practical applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Nhung Thi-Tuyet Hoang, Anh Thi-Kim Tran, Thanh-An Le, D. Duc Nguyen
Summary: The study evaluated the photocatalytic performance of a TiO2-SiO2 film combined with glycerol in degrading methyl orange dye. The optimized conditions resulted in 91% dye removal efficiency, demonstrating the enhanced efficiency of the film in degrading the dye.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Jinji Liang, Wei Zhang, Wei Xie, Zuyong Feng, Yingjun Chen, Chuwen Rao, Shikang Zeng, Zhengfa Hu, Xia Sheng
Summary: In this study, BiVO4@TiO2 nanorod arrays were fabricated and investigated for their photocatalytic performance in wastewater treatment. The results indicate that the addition of BiVO4 particles improves the degradation properties of the sample, leading to broadened absorption region and efficient suppression of carrier recombination.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Environmental Sciences
Guy Didier Fanou, Mamadou Traore, Benjamin Kouassi Yao, Andrei Kanaev, Khay Chhor
Summary: A new composite photocatalyst was developed by grafting size-selected 5-nm titanium-oxo-alkoxo nanoparticles onto P25-TiO2 nanoparticles and incorporating HAP obtained by co-precipitation of salts. The photocatalytic yield was increased for the composite photocatalysts with the addition of HAP, likely due to a synergy between adsorption and photo-oxidation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Weiwen Wang, Jin Yue, Yang Chu, Zheng Ma, Xin He, Hui Zhao, Jihai Duan
Summary: In this study, a thin-film heterojunction photocatalyst was successfully synthesized on a CuO/CM substrate using a simple electrochemical deposition method, showing good catalytic performance and stable structure for photocatalytic nitrogen fixation. By constructing a gas-liquid-solid three-phase photocatalytic reactor, the efficiency of photocatalytic nitrogen fixation was effectively enhanced.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
