Article
Chemistry, Multidisciplinary
Purnesh Chattopadhyay, Maria Camila Ariza-Tarazona, Erika Iveth Cedillo-Gonzalez, Cristina Siligardi, Juliane Simmchen
Summary: Microplastics pose a significant environmental threat, compounded by the lack of efficient removal techniques. Photocatalytic semiconducting nanoparticles show promise in degrading micropollutants, including microplastics. This study presents a novel approach by integrating self-propulsion, phoretic assembly, and photocatalytic oxidation into a single Pac-Man TiO2 micromotor, allowing for active collection and degradation of microplastics. The experiments focus on polystyrene microspheres as model microplastics, correlating degradation with catalytic activity and evaluating timescales for the involved processes.
Article
Environmental Sciences
Zhengyang Chen, Shui Yu, Jianping Liu, Yamei Zhang, Yuchen Wang, Jiangyi Yu, Ming Yuan, Pengchao Zhang, Wen Liu, Jiaoxia Zhang
Summary: The continuous presence of organic pollutants in industrial wastewater poses a significant threat to human health, necessitating urgent and effective treatment. Photocatalytic degradation technology, specifically the use of TiO2 photocatalysts, provides a viable solution for the removal of organic pollutants. However, the limited absorption of visible light by TiO2 hinders its full utilization. To address this issue, the study developed an environmentally friendly synthesis of Ag-coated on micro-wrinkled TiO2-based catalysts, enabling extended absorption of visible light. The synthesized C/F-Ag-TiO2 composite exhibited a significantly lower band gap energy and achieved a remarkable degradation rate under visible light, making it a promising candidate for highly efficient environmental remediation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiaorui Sun, Mingshu Gu, Jia Yang, Gaohong Ye, Xingguo Xiao, Min Chen, Miaomiao Liu, Zuli Chen, Huisheng Huang
Summary: In this study, Bi2GaTaO7 and Bi2InTaO7 semiconductors were discovered as visible-light-driven photocatalysts with potential for environmental cleaning. Experimental results showed that modified BGTO and BITO had better photocatalytic activities, with CuO and Ag as the optimal cocatalysts, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Shuyan Qi, Ling Guan, Ruiyan Zhang, Shanqiang Wu, Kaiyao Zhang
Summary: The Bi2Fe4((1-x))Mn4xO9 photocatalyst was prepared through coprecipitation-hydrothermal method. Doping Mn2+ reduced the photogenerated carrier recombination efficiency of Bi2Fe4O9, accelerated the electron transfer efficiency, and showed good degradation effect for RhB. When Mn2+ doping was 6%, the degradation effect for organic dyes was excellent, reaching 82.29%, and the reaction rate constant was 0.00665min(-1), which was 2.5 times higher than that of Bi2Fe4O9. The main active component in the dye degradation process was center dot OH, consistent with Bi2Fe4O9.
Article
Nanoscience & Nanotechnology
S. Bhowmick, C. P. Saini, B. Santra, L. Walczak, A. Semisalova, M. Gupta, A. Kanjilal
Summary: The engineering of work function in metal-oxide nanostructures through doping of impurities is complicated due to the introduction of multiple defects. In this study, the modulation of Fermi levels in nitrogen-doped TiO2 nanotubes (TNTs) is investigated for visible-range photocatalytic applications. Nitrogen ions are implanted in TNTs with varying fluence levels, and the effects on the crystalline quality and work function are analyzed using various techniques. The results show that nitrogen ion implantation leads to the formation of electrochemically active states near the conduction band minimum and the valence band maximum, resulting in enhanced visible-light-assisted dye degradation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Ceramics
Patricia Petriskova, Olivier Monfort, Leonid Satrapinskyy, Edmund Dobrocka, Tomas Plecenik, Gustav Plesch, Roman Papsik, Raul Bermejo, Zoltan Lences
Summary: TiO2 nanotubes were prepared on different substrates to compare their photocatalytic activity, and nanotubes grown on Ti foil exhibited the best photocatalytic activity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. Geetha, S. Renukadevi, D. Senthil Kumar, S. Ragupathy
Summary: This study investigates the use of Ag-doped TiO2-loaded groundnut shell activated carbon (Ag:TiO2/GNSAC) as a photocatalyst for the removal of rhodamine B dye solution. The photocatalytic activity of TiO2, the effects of Ag doping, and GNSAC loading were examined. The results showed that Ag:TiO2/GNSAC exhibited higher photocatalytic efficiency, making it a promising method for the treatment of pollutants in wastewater.
Article
Materials Science, Ceramics
Xueyuan Wang, Lihong Bao, Jun Wang, Xiaojian Pan, TaNa Bao, Luo Meng Chao, Juming Liu, Zizhong Liu
Summary: In this study, a novel TaB2@TiO2 heterostructure was successfully constructed by a facile sol-gel method. The TaB2@TiO2 heterojunction exhibited suitable work function and B-O bonds at the interface, facilitating the migration of photogenerated carriers. The metallic nanocrystalline TaB2 also increased the specific surface area, leading to improved photocatalytic degradation performance compared to pristine TiO2 and commercial TiO2 (P25).
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Shankar Sharma, Anuradha Sharma, Nar Singh Chauhan, Muhammad Tahir, Kavitha Kumari, Anuj Mittal, Naveen Kumar
Summary: By synthesizing TiO2/Bi2O3/PANI nanocomposites as photocatalysts, the degradation efficiency of organic pollutants has been significantly improved. Under visible light irradiation, TB(15)/PANI(5) exhibited the best photocatalytic performance and stability, showing effective degradation of organic pollutants.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Sivakumar Vigneshwaran, Chang Min Park, Sankaran Meenakshi
Summary: A novel hybrid photocatalyst NCS@MX was synthesized using a two-step hydrothermal treatment, showing high catalytic activity in degrading RhB under visible light irradiation. The use of NCS@MX increased the separation efficiency of photoinduced e and h+ through optical response and recombination rate, leading to enhanced photocatalytic degradation of RhB.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Loan T. T. Nguyen, Hang T. T. Nguyen, Thieng H. Le, Lan T. H. Nguyen, Hai Q. Nguyen, Thanh T. H. Pham, Nguyen D. Bui, Ngan T. K. Tran, Duyen Thi Cam Nguyen, Tan Van Lam, Thuan Van Tran
Summary: Nanocrystalline ZnNdxFe2-xO4 ferrites with different Nd3+ ion concentrations were fabricated in this study, showing enhanced photocatalytic activity for dye degradation. The addition of Nd3+ ions resulted in smaller grain size, reduced optical bandgap energies, and more efficient separation of photoinduced electron and holes in the ferrite samples.
Article
Environmental Sciences
Manjiri A. Mahadadalkar, NaHyun Park, Mohammad Yusuf, Saravanan Nagappan, Muthuchamy Nallal, Kang Hyun Park
Summary: Water pollution caused by industrial wastewater is a critical environmental problem. Synthetic dyes used in various industries have complex composition, high toxicity, and low biodegradability, causing negative impacts on ecosystems. To address this issue, TiO2 fibers photocatalyst doped with Fe was synthesized using sol-gel and electrospinning techniques for the degradation of dyes. The fabricated fibers showed excellent photocatalytic degradation activity, with 99% degradation of rhodamine B in 120 minutes. The fibers also demonstrated good photocatalytic activity even after 5 cycles of reuse.
Article
Chemistry, Inorganic & Nuclear
Ali Moulahi
Summary: The study successfully elaborated undoped and Mg doped ZnO nanostructures using the polyol process and characterized the final particles through various analytical techniques. It was found that Mg doping significantly enhanced the photocatalytic properties of ZnO nanoparticles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Rongrong Song, Ninghua Chen, Biao Han, Sishan Yu, Yue Wang, Kun Liu, Zhangfa Tong, Hanbing Zhang
Summary: Br/Bi2WO6 prepared by microwave hydrothermal method displayed superior photocatalytic activity due to increased specific surface area, wide UV-vis light absorption range, and high separation efficiency of photogenerated charge carriers originating from Br doping and microwave heating.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Inorganic & Nuclear
Ntakadzeni Madima, Kebede K. Kefeni, Shivani B. Mishra, Ajay K. Mishra, Alex T. Kuvarega
Summary: This study successfully synthesized magnetic Fe3O4/TiO2 nanocomposites as efficient and recyclable photocatalysts for degrading rhodamine B pollutants under simulated solar light. By optimizing factors such as Fe3O4 loading, photocatalyst properties, and reuse cycles, the photocatalytic activity and stability were improved.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
