Article
Chemistry, Physical
Deng-Hua Li, Zhen-Yi Jiang, Yan-Min Lin, Ji-Ming Zheng
Summary: The study used first-principles DFT+U method to investigate the doping effects of Sn/Pb atoms in TiO2 anatase phase. Results showed that Sn atoms preferentially replace internal titanium atoms, while Pb atoms are more likely to substitute surface titanium atoms. The presence of tin ions and lead ions creates electron traps, delaying the recombination time of photogenerated electron-hole pairs and playing a key role in photocatalytic performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Luminita Predoana, Elena Madalina Ciobanu, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Elena Maria Anghel, Simona Viorica Petrescu, Daniela Cristina Culita, Adriana Baran, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. C. Ianculescu
Summary: The tin-doped TiO2 powders were synthesized using sol-gel and microwave-assisted sol-gel methods, with different amounts of SnO2 precursor. The structure and morphology of the annealed nanopowders were characterized using various techniques. The Sn-doped materials showed high photocatalytic efficiency for the removal of methyl orange dye from aqueous solutions, with a degradation efficiency of around 90% after 3 hours of UV light irradiation.
Article
Chemistry, Physical
Yuanting Wu, Qiujun Liu, Tiantian Liu, Jinrong Wang, Shuming Xu
Summary: This study investigates the preparation of multilayer structured films and the influence of interactions between different layers on photocatalytic performance. By depositing a Cu2+ doped TiO2-SiO2 layer on a SiO2 photonic crystal layer, a photonic crystal/Cu2+ doped TiO2-SiO2 film was constructed, which exhibits superior photocatalytic performance. Additionally, an amorphous SiO2 layer was added between the photonic crystal film and the photocatalyst layer to study the optical local interaction range. The mechanism of the multilayer structured film is also discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Atasheh Soleimani-Gorgani, Hussein E. Al-Hazmi, Amin Esmaeili, Sajjad Habibzadeh
Summary: Sn-doped TiO2 nanoparticles were synthesized using a sol-gel method and screen-printing pastes were prepared to evaluate their photocatalytic activity. The highest photocatalytic activity was obtained at a calcination temperature of 450 degrees C.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Phuong Dao, Kang Du, Guohua Liu, Gang Li, Muhammad Tayyib, Kaiying Wang
Summary: This study presents the synthesis and photocatalytic properties of Silicon-doped TiO2 nanotubes (TNTs) using the hydrothermal method. The doping level of Silicon was varied within the range of 1-30%, leading to enhanced crystallinity and purity of the anatase phase. The doping also resulted in a redshifted absorption spectra and improved photocatalytic activity.
Article
Engineering, Environmental
Feiyan Lu, Kao Chen, Qingge Feng, Huidong Cai, Dachao Ma, Dongbo Wang, Xiang Li, Chen Zuo, Sinan Wang
Summary: The study focuses on the synthesis of TiO2-based materials for photocatalysis in water treatment, emphasizing the need to address issues related to catalyst separation and carrier recombination. The research introduces a novel magnetical core-shell Fe3O4@SiO2@Sn-TiO2 composite photocatalyst with enhanced performance in tetracycline hydrochloride degradation. Sn2+ doping increases TiO2 content, resulting in improved photocatalytic activity and recyclability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xianqiang Chu, Xiaoqi Jiang, Hui Zhang, Cheng Wang, Fangzhi Huang, Xiaoyu Sun, Shikuo Li
Summary: This study presents the preparation of ordered Al-doped SrTiO3/TiO2 heterojunction nanorod arrays (Al-STO/TiO2 HNRAs) for efficient piezo-photocatalysis. The Al doping helps modulate the migration and separation of charge carriers and prolongs the charge lifetime. Under co-excitation of ultrasonic and ultraviolet irradiation, the Al-STO/TiO2 HNRAs display a significantly higher oxidation rate constant compared to the un-doped sample.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Ceramics
Jing Wang, Zhinuo Wang, Dongyang Zhao, Yao Liang, Hualin Wang, Nan Wang, Weiwei Jiang, Shimin Liu, Chaoqian Liu, Wanyu Ding, Zhihua Zhang
Summary: Based on the results, co-doping of Sn/Fe in TiO2 nanoparticles inhibited the crystallization transformation and decreased the energy band gap. The abnormal grain growth of the particles was observed due to the influence of calcination temperature and dopant. The co-doped nanoparticles with 0.6 at.% Sn/0.2 at.% Fe and 1.0 at.% Sn/1.0 at.% Fe showed better photocatalytic performance under visible light irradiation, while the nanoparticles co-doped with 0.2 at.% Sn and 0.6 at.% Fe and calcined at 650 degrees C exhibited the highest photocatalytic performance under UV light irradiation.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
R. Rajeswari, D. Venugopal, Amal George, A. Dhayal Raj, S. John Sundaram, A. K. H. Bashir, M. Maaza, K. Kaviyarasu
Summary: Sn-doped TiO2 thin films were deposited on glass substrates using a simple sol-gel method, characterized by XRD, UV-Vis, FTIR, and PL. The results showed that increasing doping concentration led to larger crystallite size, decreased bandgap values, and increased emission peak intensity. The films also exhibited different antibacterial properties towards E.coli and S.aureus, with a stronger inhibitory effect on E.coli.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Junlei Wang, Kuan Wang, Zhen-Hong He, Song-Song Li, Rong-Rong Zhang, Pengfei Guo, Weitao Wang, Yang Yang, Zhao-Tie Liu
Summary: Hierarchical TiO2 nanoflowers were synthesized using a solvothermal route with tunable morphology and structure, showing significantly high photocatalytic activity in the degradation of phenol. The catalyst exhibited excellent cyclic stability and regenerability, attributed to its larger surface areas and effective charge carrier separation mechanism.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
R. Ranjith, S. Ravikumar, V Pandiyan, Umamaheswari Rajaji, Khamael M. Abualnaja, Taghrid S. Alomar, Najla AlMasoud, Mohmed Ouladsmne
Summary: TiO2-Co3O4 and TiO2-Co3O4/graphene oxide nanocomposites were successfully prepared and utilized for the degradation of organic pollutants in this study. The GTC catalyst showed complete degradation of organic dyes under light irradiation, indicating a significant enhancement in photocatalytic activity compared to TC.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Weizhao Huang, Hui Mei, Peng Chang, Zhipeng Jin, Shenwei Bai, Longkai Pan, Laifei Cheng
Summary: A novel MoS2@Cu(OH)2 composite with complicated 3D structures was inspired by Green Hairstreak wings to enhance photocatalytic and mechanical properties. The interface capacity of MoS2 was controlled through printing the bio-structural metamaterial of minimal surface. The hierarchical pore structure achieved high porosity and abundant anchor sites.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
T. Raguram, K. S. Rajni
Summary: In this study, copper-doped TiO2 nanoparticles with different molar concentrations of copper precursor were synthesized via sol-gel technique. The effects of copper doping on the properties of TiO2 were analyzed systematically, and it was found that 0.1 M concentration of Cu was the optimum dopant concentration for DSSC and photocatalytic applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Petronela Pascariu, Corneliu Cojocaru, Mihaela Homocianu, Petrisor Samoila, Cosmin Romanitan, Djourelov Nikolay
Summary: A series of tin (Sn)-doped titania (TiO2) composites were prepared by electrospinning and calcination. The effect of dopant amounts and calcination temperatures on the composition, morphology, and photocatalytic activity of the composites was evaluated. The ([1.5%]Sn:TiO2) composite sintered at 500°C showed remarkable photocatalytic activity with a removal efficiency of about 100% and a rate constant of 9.685 x 10-2 min-1. Structural investigations were conducted to explain the photocatalytic activity towards water decontamination.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Fahim A. Qaraah, Samah A. Mahyoub, Abdo Hezam, Amjad Qaraah, Feng Xin, Guangli Xiu
Summary: A novel 3D O-doped g-C3N4/N-doped Nb2O5 (OCNNb) S-scheme heterojunction photocatalyst was successfully fabricated using control of each material's surface charge-induced heteroaggregation. The optimized sample exhibited substantially higher conversion rates of CO2 compared to blank control samples (O-doped g-C3N4 and N-doped Nb2O5). The enhanced photocatalytic efficiency can be attributed to the prevention of charge carrier recombination and the presence of high specific surface areas and abundant active sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)