Article
Materials Science, Multidisciplinary
Svetlana A. Kuznetsova, Olga S. Khalipova, Konstantin V. Lisitsa, Liliya A. Selunina, Victor V. Khasanov, Alexandra G. Malchik, Yu-Wen Chen
Summary: Hierarchical MoO3/TiO2-SiO2 layered spherical composites were synthesized on anion exchanger template, and their properties and photocatalytic performance were characterized. The formation of TiO2-SiO2 shell on the MoO3 core led to lower oxygen vacancy concentrations and reduced bandgap width. The MoO3/TiO2-SiO2 composites showed higher photocatalytic activity.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Multidisciplinary
Guiqing Huang, Wanneng Ye, Chunxiao Lv, Denys S. Butenko, Chen Yang, Gaolian Zhang, Ping Lu, Yan Xu, Shuchao Zhang, Hongwei Wang, Yukun Zhu, Dongjiang Yang
Summary: In this study, RP modified TiO2 hollow spheres were used for solar-to-hydrogen conversion. The optimal hydrogen production rate was achieved with the TiO2@RP heterostructure under simulated solar light irradiation. The hollow sphere structure and RP light absorber extended light absorption ability, and the heterostructure induced interfacial charge migration facilitated photoinduced charge separation, resulting in enhanced photocatalytic hydrogen production performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhongli Zhou, Hang Yin, Yuling Zhao, Jianmin Zhang, Yahui Li, Jinshi Yuan, Jie Tang, Fengyun Wang
Summary: By controlling the phosphate concentration, the recombination rate of electron-hole pairs can be reduced to enhance photocatalytic performance. The heterojunction between alpha-Fe2O3 and RT in the hollow nanospheres leads to excellent photocatalysis under visible light, significantly improving the degradation rate of rhodamine B.
Article
Chemistry, Physical
Qun-Yan Li, Shou-De Han, Jun-Guo Liu, Lu-Yao Sun, Ya-Li Wang, Qi Wei, Su -Ping Cui
Summary: In this study, a novel type of hollow hierarchical porous TiO2/Ag composite microsphere with tunable microstructure was successfully prepared. Compared with hollow hierarchical porous TiO2 microspheres, the composite microspheres showed a shift in excitation wavelength towards visible light direction, improved response range and light utilization rate. The optimal addition amount of Ti and Ag resulted in specific surface area of 177 m2/g, pore volume of 0.37 cm3/g, and primary and secondary pore sizes of 4.04 nm and 7.74 nm, respectively. They exhibited the highest photocatalytic activity towards 365 nm and 395 nm ultraviolet light, with degradation rates of methyl orange solution reaching 96.84% and 98.65%, respectively. Their excellent performance was attributed to the unique combination of hierarchical pores and hollow structures, as well as the synergistic effect of Ag and TiO2.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Xun Sun, Xiao Yan, Huijuan Su, Libo Sun, Lijun Zhao, Junjie Shi, Zifan Wang, Jianrui Niu, Hengli Qian, Erhong Duan
Summary: In this study, a non-stacked gamma-Fe2O3/C@TiO2 double-layer hollow nano photocatalyst with ultrathin nanosheets-assembled double shells was developed for the photodegradation of phenol. The non-stacked gamma-Fe2O3/C@TiO2 showed high catalytic performance, as it could completely degrade phenol in 135 minutes under visible light. This was attributed to the moderate band edge position of the catalyst, which allowed for excitation in the visible light region and the production of a high concentration of free radicals.
Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Physics, Condensed Matter
Yongan Niu, Manyuan Li, Xueyan Jia, Zihang Shi, Haixiong Liu, Xin Zhang
Summary: In this study, ellipsoidal and flower-like α-Fe2O3@TiO2 nanoparticles were successfully fabricated by modified Stober method and solvothermal method. The α-Fe2O3@TiO2 nanoparticles exhibited enhanced photocatalytic activity for dye degradation.
SOLID STATE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Fatemeh Firouzi, Azadeh Ebrahimian Pirbazari, Fatemeh Esmaeili Khalil Saraei, Fatemeh-Sadat Tabatabai-Yazdi, Amin Esmaeili, Ziba Khodaee
Summary: Binary nanocomposites of CdS nanoparticles impregnated on TiO2 nanosheets and graphene oxide were prepared and showed that O-2(center dot-) played a major role in photocatalytic removal. The integration of adsorption and photocatalysis processes significantly impacted the removal of the pharmaceutical pollutant TC.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Minmin Han, Biao Guo, Zhengyang Zhang, Xun Hu, Zhonghao Wang
Summary: We prepared Bi4Ti3O12/TiO2 hollow nanocakes via a metal-organic framework (MOF)-derived calcination strategy. The photocatalytic hydrogen generation performance of the nanocakes was enhanced compared to TiO2 hollow nanocakes. The improvement in photocatalytic properties was attributed to the increased specific surface area, as well as the type II heterojunction between Bi4Ti3O12 and TiO2, which enhanced light-harvesting efficiency and suppressed charge carrier recombination.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Physical
Jiabi Li, Xi Wu, Shengwei Liu
Summary: Extensive studies have focused on synthesizing spherical microassemblies with specific surface functionalizations and hollow interiors for various applications. Focusing on the fabrication of fluorinated TiO2 porous hollow microspheres (F-TiO2 PHMs), this review highlights the simplified two-step templating method and template-free method based on the fluoride-mediated self-transformation (FMST) mechanism. The unique superstructures of F-TiO2 PHMs provide advantages for photocatalytic applications by improving light harvesting, mass transfer, and membrane antifouling, while in situ-introduced surface fluorine species enhance adsorption, activation of reactants, and surface trapping of photo-excited electrons and holes.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Environmental Sciences
Zhifang Zong, Depeng Chen, Chunxiao Zhao, Gang Tang, Yilong Ji, Hao Zhang, Zhong Lv, Wei Dong, Xiujuan Zhu
Summary: The research showed that Ce-Eu/TiO2 hollow microspheres have excellent photocatalytic degradation performance towards indoor formaldehyde. The degradation process of formaldehyde is influenced by both adsorption and photocatalysis at different concentrations, consistent with different kinetics reactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Yan Bao, Ruyue Guo, Min Gao, Qiaoling Kang, Jianzhong Ma
Summary: A novel 3D hierarchical urchin-like SiO2@TiO2 sphere with hollow structure and anatase-rutile biphase was synthesized via solvothermal process, and the effects of calcination temperature on its photocatalytic activity were systematically studied. The 3D-UHSTs prepared at a calcination temperature of 700 degrees C exhibited higher photocatalytic activity due to electron transfer and reduced electron/hole recombination. The photocatalytic degradation of RhB followed first-order reaction kinetics, with a rate constant of 0.04654 min(-1).
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
T. Thai Ha Vu, T. Anh Thu Do, Duc Toan Nguyen, Truong Giang Ho, Quang Ngan Pham, Hong Thai Giang, Manh Ha Hoang, T. Ha Lien Nghiem, Minh Tan Man, Dai Lam Tran
Summary: Hierarchical structures composed of MoS2 nanosheets grown on Bi2S3 nanorods were prepared via hydrothermal reaction. The innovative heterostructures with distinct porosity and close interfacial contact facilitate effective visible-light utilization and provide permeable routes for reactant molecules to enter the inner structure. The Bi2S3 @MoS2 heterostructure with 50% MoS2 exhibited superior adsorption and photodegradation of Rhodamine B, reaching 97.5%. Toxic heavy metal ions and organic pollutants in water can be eliminated using attractive heterostructures with excellent adsorption capacities and photocatalytic activities.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Milena Synowiec, Dominika Zakutna, Anita Trenczek-Zajac, Marta Radecka
Summary: The synthesis method used allows for uniform deposition of both large and small Fe2O3 nanoparticles on the surface of TiO2. Analysis confirms the presence of anatase TiO2 and hematite Fe2O3 in the heterostructure. The TiO2@Fe2O3 heterostructure exhibits enhanced photocatalytic activity compared to pure titanium and iron oxides. The magnetic properties and optical transitions in nanometric Fe2O3 are influenced by the size of the Fe2O3 particles on the surface of TiO2 nanocrystals.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yongxia Li, Binsheng Yang, Bin Liu
Summary: In this study, a novel heterojunction photocatalyst consisting of TiO2 and Fe2O3 was constructed with the addition of metallic Au, leading to enhanced photocatalytic performance. The catalyst demonstrated excellent performance under visible light conditions, evaluated through hydrogen production and phenolic compound removal.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
