Article
Materials Science, Ceramics
Lingling Wu, Cuiping Guo, Ruohan Feng, Haoyue Zhang, Nan Shi, Yao Li, Huilan Su, Xinjiang Cui, Fang Song
Summary: This study successfully enhanced the visible light absorption and solar photocatalytic efficiency of TiO2 by codoping phosphonis(V) and Titanium(III) into leaf-architectured TiO2 via a sol-gel biotemplating approach. The codoping strategy led to a 2.6 times higher solar photocatalytic degradation rate compared to commercial TiO2 P25.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Zohra Nazir Kayani, Ammara Iqbal, Zainab Bashir, Saira Riaz, Shahzad Naseem
Summary: Researchers are increasingly interested in thin film materials due to the growing demand in the electronics industry. In this study, K-doped TiO2 thin films were synthesized using sol-gel dip-coating, and the effects of K concentration on the properties of the films were investigated. The results showed that K doping had a significant impact on the morphological, structural, magnetic, dielectric, antibacterial, and optical characteristics of the TiO2 films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Adeeba Naz, Shatha A. Aldaghfag, Muhammad Yaseen, Mehwish K. Butt, Muhammad Kashif, Muhammad Zahid, Shanza Mubashir, H. H. Somaily
Summary: In this study, the FP-LAPW method based on DFT was used to investigate the effects of Ce doping on the band structure and optical properties of BaTiO3 compound. The results revealed that Ce doping can transform Ba1-xCexTiO3 from an indirect band gap semiconductor to a direct band gap semiconductor, and the band gap width decreases with the increase of Ce concentration. Furthermore, the optical behavior of Ba1-xCexTiO3 compounds was evaluated, and it was found that Ce doping could make BaTiO3 compound promising for optical and optoelectronic devices.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Olim Ruzimuradov, Khusniddin Musaev, Shavkat Mamatkulov, Khakimjan Butanov, Isabel Gonzalo-Juan, Liudmila Khoroshko, Nurmuhammad Turapov, Suvonkul Nurmanov, Jamoliddin Razzokov, Victor Borisenko, Ralf Riedel
Summary: Nickel and chromium metal ions have been used to extend the light absorption range of titanium dioxide nanocrystals by doping and co-doping them. Various analysis techniques were employed to study the modified materials, revealing that the modified catalyst primarily contains the anatase polymorph. The incorporation of transition metal ions in the TiO2 nanocrystals resulted in a decrease in the band gap width and a decrease in photoluminescence intensity.
Article
Nanoscience & Nanotechnology
Daniel B. Straus, Robert J. Cava
Summary: By using solid-state synthesis, the band gap of halide perovskite CsPbBr3 can be continuously widened through homovalent substitution, allowing its optical properties to be tailored for absorptive and emissive applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Ahmed M. Bolbol, Omar H. Abd-Elkader, Hassan Elshimy, Zaki I. Zaki, Salah A. Shata, M. Kamel, Ahmed S. Radwan, Nasser Y. Mostafa
Summary: In this study, dense thin films of TiO2 and TiO2 doped with Zr4+ were prepared using spin coating on glass substrate and characterized. The results showed that doping Zr4+ can change the optical and crystalline structure properties of TiO2, with higher doping concentration leading to lower band gap energy, slight lattice enlargement, and smaller crystal size. Additionally, the doped films exhibited typical photoluminescence in the visible spectrum region and had a lower rate of electron-hole recombination.
RESULTS IN PHYSICS
(2022)
Article
Engineering, Environmental
Tao Ke, Shuyi Shen, Krishnamoorthy Rajavel, Kun Yang, Daohui Lin
Summary: A novel hybrid of nitrogen-doped Ti3C2 nanosheets and TiO2 nanoparticles was developed for efficient photocatalysis. The heterojunction between nitrogen-doped Ti3C2 and TiO2, along with the nitrogen doping, played crucial roles in facilitating electron migration and inhibiting electron-hole pair recombination, resulting in enhanced degradation of methylene blue under UV-light.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zohra Nazir Kayani, Mamoona Ashfaq, Saira Riaz, Shahzad Naseem
Summary: In this study, copper-doped titanium dioxide thin films were synthesized on glass substrates using a sol-gel dip-coating technique. The addition of copper affected the structural, morphological, dielectric, antibacterial, and optical properties of the films. The copper-doped films showed low dielectric constant, making them ideal for high-frequency devices, and the optical band gap energy decreased with increasing copper concentration, improving the efficiency of solar cells. Moreover, the copper-doped films exhibited enhanced photocatalytic activity, which could be potentially applied in water treatment.
Article
Materials Science, Ceramics
Yuzheng Wang, Xiaoxu Wang, Laishi Li, Yusheng Wu, Qun Yu
Summary: Boron-doped titanium dioxide nanoparticles (B-TiO2 NPs) were prepared by a sol-gel method and characterized by various techniques. The experimental results demonstrate that doping boron ions can enhance the photocatalytic antibacterial performance of B-TiO2 NPs, with boron atoms mainly existing as substitutional and interstitial dopants.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Itishree Pradhan, Anwesha Mahapatra, Arkamita Bandyopadhyay, Alpana Nayak, Prashant Kumar
Summary: This study reports the controlled synthesis of large-scale Ag-2D TiO2 sheets by manipulating the surface energy, and achieves tunable band gap with Ag doping, which is significant for visible light-sensitive films and device applications.
Article
Materials Science, Multidisciplinary
Cheol Hwan Kwak, Ui-Su Im, Sang Wan Seo, Min Il Kim, Yun Suk Huh, Ji Sun Im
Summary: Carbon-doped TiO2 (C-TiO2) was successfully synthesized using PVA, resulting in enhanced visible-light photocatalytic activity and improved sensitivity in NO gas detection.
Article
Chemistry, Physical
Catia Afonso, Orlando Lima Jr, Iran Rocha Segundo, Salmon Landi Jr, Elida Margalho, Natalia Homem, Mario Pereira, Manuel F. M. Costa, Elisabete Freitas, Joaquim Carneiro
Summary: This research presents a low-cost doping method for TiO2 nanoparticles and investigates the effects of calcination and the weight ratio of TiO2:FeCl3 on their photocatalytic activity. The results show that calcination leads to the transformation of the TiO2 phase from anatase to rutile. The inclusion of Fe in TiO2 modifies its spectrum and exhibits a connection in the Ti-O-Fe vibration. The TiO2 with a ratio of (1:1.6) demonstrates the highest activity in the degradation of RhB dye, achieving an efficiency of 93.8% after 3 hours of irradiation.
Article
Materials Science, Multidisciplinary
Zelin Xia, Shuang Xing, Hualin Wang, Dongyang Zhao, Sumei Wu, Weiwei Jiang, Nan Wang, Shimin Liu, Chaoqian Liu, Wanyu Ding, Zhihua Zhang
Summary: Fe-doped TiO2 nanoparticles with pure anatase structure and spherical morphology were successfully synthesized through coprecipitation method. The crystallite size increased with the increase of calcination temperatures. Fe doping decreased the energy band gap (Eg) of TiO2, leading to enhanced photocatalytic performance. The maximum degradation efficiency of methyl orange (MO) reached 46.3% under visible light irradiation for Fe-doped TiO2 nanoparticles with a Fe doping concentration of 0.3 at.% and calcination temperature of 300?.
Article
Materials Science, Multidisciplinary
Priya S. Nair, Hiba Rahman, Julie Ann Joseph, Aleena Norbert, Sadasivan Shaji, S. Tripathi, S. N. Jha, Rachel Reena Philip
Summary: The present study focuses on improving the photocatalytic performance of Titanium dioxide nanotubes (TNTs) by manganese doping and the subsequent formation of a heterojunction. The influence of doping and junction formation on the structural, optical, morphological and electrical properties of TNTs are analyzed. The results show that manganese doping modifies the optical band gap and conductivity of TNTs, while the formation of an n-MnO2 layer plays a crucial role in enhancing photocatalytic performance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Review
Physics, Applied
Radhika Nair, Venkata Siva Gummaluri, Murukeshan Vadakke Matham, C. Vijayan
Summary: The engineering of the bandgap in semiconductor nanostructures from ultraviolet to visible is highly significant in various applications. Techniques such as doping, co-doping, and intrinsic vacancy modulation have been found to effectively narrow the bandgap. Titanium dioxide (TiO2) is a well-studied material for UV photocatalysis, and its bandgap can be controlled through the modulation of intrinsic vacancies. Doping and co-doping with metals and non-metals, as well as other techniques, have been found to narrow the bandgap of TiO2. This review focuses on the intrinsic vacancy-modulated bandgap narrowing in TiO2 and covers recent advancements in this field.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
