Article
Chemistry, Multidisciplinary
Eda Keles Guner
Summary: For the first time, bentonite-Zn doped CoFe2O4 photocatalysts were synthesized by decorating magnetic nanoparticles of ZnxCo1-xFe2O4 onto the surface of bentonite to enhance their photocatalytic performance. The effects of Zn2+ concentration on the particle size, shape, magnetic properties, optical band gap, and photocatalytic activities of B-ZnxCo1-xFe2O4 nanocomposites were thoroughly investigated. The B-ZnxCo1-xFe2O4 (x=0.5) showed the highest photocatalytic activity for the degradation of crystal violet under visible light irradiation, with superoxide radicals playing a main role in the degradation process.
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
Physics, Condensed Matter
Furqan Ahmad, Rafaqat Hussain, A. Shah, Shams ur Rahman
Summary: This study investigates the photocatalytic properties of SnO2-CuSe nanocomposites with varying amounts of CuSe. The results show that the sample with 32% CuSe content exhibits the best photocatalytic performance. The fabrication of the samples was confirmed to be successful without any impurities using XRD, Raman spectroscopy, and EDAX analysis.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Environmental
Harshavardhan Mohan, Vaikundamoorthy Ramalingam, Aravinthan Adithan, Karthi Natesan, Kamala-Kannan Seralathan, Taeho Shin
Summary: In this study, spherical zinc ferrite nanoparticles were prepared with uniform size and a band gap suitable for visible light absorption. Zinc doping enhanced the absorption of visible light and improved the separation of photogenerated carriers, resulting in effective photocatalytic degradation of CBZ. The material showed high removal efficiency and a pseudo first-order kinetics with a rate constant of 0.0367 min(-1). In-vitro and in-vivo toxicity of the nanoparticles were also examined for environmental implications.
JOURNAL OF HAZARDOUS MATERIALS
(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
Chemistry, Physical
Bulent Caglar, Eda Keles Guner, Selin Ersoy, Sema Caglar, Agah Oktay Ozdemir, Kemal Volkan Ozdokur, Bilge Dogan, Fatih Icer, Cagri Cirak
Summary: In this study, a bentonite-Bi2S3 nanocomposite was prepared for the first time to enhance the photocatalytic performance of Bi2S3 nanorods under visible light irradiation. The nanocomposite showed superior photodegradation efficiency for crystal violet and rhodamine B dyes compared to bare Bi2S3 nanorods, attributed to its good light absorption ability, enlarged surface area, increased adsorption capability, and suppressed hole-electron recombination process. The reactive species trapping revealed that hydroxyl radicals played a major role in the photodegradation process, and the photocatalyst exhibited good reusability and stability after multiple cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Qingyao Wang, Yuhua Zhao, Zifeng Zhang, Shengwen Liao, Yadan Deng, Xiang Wang, Qilu Ye, Kesheng Wang
Summary: Efficient TiO2 NTs/Sn3O4 photocatalysts were synthesized by hydrothermal deposition of Sn3O4 on TiO2 nanotube arrays, with the morphology and photocatalytic properties adjusted by changing the alkali used. The TiO2 NTs/Sn3O4 prepared with NaOH showed outstanding photoelectric conversion and photocatalytic remediation/H2 evolution properties. The photocatalysts could remove methylene blue dye and Cr(VI) under visible light, with center dot O2- /center dot OH radicals identified as the main active species for MB degradation. The high photocatalytic H2 evolution rate reached 6.49 mu mol cm-2 h-1. The outstanding activity and stability of TiO2 NTs/Sn3O4 photocatalysts make them attractive for wastewater treatment and energy generation.
CERAMICS INTERNATIONAL
(2023)
Article
Biochemistry & Molecular Biology
Thomas Cadenbach, Valeria Sanchez, Daniela Chiquito Rios, Alexis Debut, Karla Vizuete, Maria J. Benitez
Summary: In recent years, there has been significant interest in semiconductor hollow spheres due to their unique combination of morphological, chemical, and physico-chemical properties. In this study, we successfully synthesized BiFeO3 hollow spheres for the first time using a hydrothermal treatment method, and systematically investigated the mechanism of their formation. The synthesized hollow spheres showed high catalytic activity in the photodegradation of Rhodamine B under visible-light irradiation, with complete degradation occurring in less than 150 min at neutral pH. The superior efficiencies of the synthesized material can be attributed to the unique features of hollow spheres, as confirmed by trapping experiments.
Article
Materials Science, Multidisciplinary
Salam Hussein Alwan, Karrar Hazim Salem, Hassan Abbas Alshamsi
Summary: In this study, reduced graphene oxide coated titanium dioxide nanocomposites were prepared through a hydrothermal synthetic route. The nanocomposites were found to have good photocatalytic activity for Rhodamine B dye degradation. The composition, optical activity, morphology, and porosity of the nanomaterials were characterized using various techniques. The results showed that the nanocomposites exhibited high efficiency in photocatalytic degradation of the dye.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Abhishek Bhapkar, Rishi Prasad, Dipika Jaspal, Mandar Shirolkar, Kh. Gheisari, Shekhar Bhame
Summary: Zinc oxide nanoparticles were successfully synthesized using glycine nitrate solution combustion synthesis. The synthesized nanoparticles exhibited a pure hexagonal wurtzite-like structure of ZnO. They showed effective visible light catalytic activity in the degradation of methylene blue dye, degrading 98% of the dye in 120 minutes with 0.1 g/L of catalyst loading. Photoluminescence studies suggested that the enhanced photocatalytic activity may be attributed to the presence of singly ionized oxygen vacancy or intrinsic defects.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Di Zhou, Rui Du, Zhenglong Hu, Shu Gao, Yafang Tu, Yunfei Fu, Guang Zheng, Youhua Zhou
Summary: Bi2MoO6/TiO2 heterostructures were synthesized, which exhibited excellent visible-light absorption due to the presence of Bi2MoO6 nanosheets. The hierarchical structure composed of Bi2MoO6 nanosheets and TiO2 nanorods significantly increased the specific surface area and pore volume of the photocatalysts. The improved performance of the Bi2MoO6/TiO2 heterostructures in methylene blue degradation was attributed to the extended absorption of visible light, the large specific surface area of the hierarchical structure, and the enhanced separation efficiency of electron-hole pairs.
Article
Engineering, Environmental
Munir Ahmad, Wajid Rehman, Mohammad Mansoob Khan, Muhammad Tauseef Qureshi, Anadil Gul, Sirajul Haq, Rizwan Ullah, Abdur Rab, Farid Menaa
Summary: Au-ZnO hetero-nanostructures were successfully synthesized using green-synthesis method with pecan nuts leaves extract as reducing agent, showing enhanced photocatalytic activity attributed to the structural modifications and decreased energy band-gap value. The Au-ZnO catalyst exhibited good stability in recycling study, making it a promising candidate for photodegradation applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Elham Kharatzadeh, Marzieh Khademalrasool
Summary: In this study, SnS and SnS/reduced graphene oxide nanostructures were synthesized using a co-precipitation method. Different concentrations of graphene oxide were used to prepare SnS/graphene oxide nanocomposites and their structural and optical properties as well as photocatalytic activity were investigated. The results showed that the presence of reduced graphene oxide sheets improved the photocatalytic efficiency of the nanocomposites. The optimal concentration of graphene oxide was found to be 15 wt% for achieving the highest photocatalytic efficiency.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
A. Al-nayili, H. A. Khayoon, H. A. Alshamsi, N. M. Cata Saady
Summary: Nowadays, water quality is a major challenge for humanity, and hybrid nanomaterials have gained attention for their ability to treat water solutions. In this study, monometallic (Pd and Au) and bimetallic (Pd-Au) hybrid nanomaterials supported on reduced graphene oxide (rGO) were synthesized and used as catalysts for photocatalytic Rhodamine B degradation. The bimetallic-supported rGO sample showed higher photocatalytic degradation efficiency compared to monometallic samples.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Polymer Science
Abubakar Usman Katsina, Sonia Mihai, Danuta Matei, Diana-Luciana Cursaru, Raluca Somoghi, Cristina Lavinia Nistor
Summary: Synthetic organic pigments from textile effluents are a global concern. Constructing heterojunction systems with precious metal co-catalysis is an effective strategy for efficient photocatalytic materials. A Pt-doped BiFeO3/O-g-C3N4 (Pt@BFO/O-CN) S-scheme heterojunction is reported here for photocatalytic degradation of aqueous rhodamine B (RhB) under visible-light irradiation. The Pt@BFO/O-CN heterojunction shows superior performance compared to other catalysts due to its asymmetric nature. It achieves 100% degradation efficiency of RhB after 50 minutes of visible-light irradiation.
