Article
Chemistry, Multidisciplinary
Sanya Khursheed, Rida Tehreem, Muhammad Awais, Dilshad Hussain, Muhammad Imran Malik, Young Sun Mok, Ghayas Uddin Siddiqui
Summary: The purpose of this study was to investigate the effect of photocatalytic degradation using nitrogen and tungsten co-doped titania (TiO2) nanoparticles, which are cost-effective and environmentally friendly. The synthesized nanoparticles were analyzed using various techniques, including spectroscopy, microscopy, and spectrometry. The co-doping of metal and non-metal enhanced the photocatalytic properties of the TiO2 nanoparticles, particularly in the visible region. This resulted in improved absorption of visible light and reduced recombination of electron-hole pairs, leading to accelerated photodegradation. The bandgap of the titania nanoparticles was reduced after efficient doping, enabling the photodegradation of malachite green under visible light illumination. The results of photocatalytic degradation were confirmed using spectroscopy and high-performance liquid chromatography coupled with mass spectrometry.
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
Environmental Sciences
Lucy M. Ombaka, James D. McGettrick, Ekemena O. Oseghe, Osama Al-Madanat, Felix Rieck Genannt Best, Titus A. M. Msagati, Matthew L. Davies, Thomas Bredow, Detlef W. Bahnemann
Summary: This study demonstrates the potential of boron/nitrogen graphene-coated Cu0/TiO2 photocatalyst for large-scale H2 production and 2-CP degradation, with a B:N ratio of 0.08 yielding the most efficient results.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Mai Mersal, Gehad G. Mohamed, Abdallah F. Zedan
Summary: Alcohol oxidation is an important chemical reaction of interest in energy and industrial sectors. In this study, n-TiO2@WO3 heterojunction photocatalysts were prepared and their catalytic activity towards methanol oxidation under visible-light was investigated. The hybrid photocatalyst showed enhanced activity compared to pure counterparts.
Article
Engineering, Chemical
Ndumiso Vukile Mdlovu, Kuen-Song Lin, Chi -Jung Chang, You-Sheng Lin, Syeda Fareesa Hassan
Summary: In this study, tungsten-doped titania nanotubes were synthesized to enhance their reactivity in the photodegradation of various dyes under UV radiation. The W-doped TNs exhibited a high specific surface area and the presence of W6+ species, as confirmed by XPS spectra. The photodegradation of the dyes involved two-step reactions, and the W-doped TNs showed optimal photocatalytic efficiencies for the degradation of each dye.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Multidisciplinary
Rashed Aleisa, Ji Feng, Zuyang Ye, Yadong Yin
Summary: This study reports the synthesis of surface-functionalized N-doped TiO2 nanocrystals that rapidly change color from whitish to black under low-power irradiation and exhibit excellent color stability in atmospheric conditions. These nanocrystals show great potential for color-switching applications, especially in the development of rewritable paper with excellent writing and erasing reversibility.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Amanda Chen, Wen-Fan Chen, Tina Majidi, Bernadette Pudadera, Armand Atanacio, Madhura Manohar, Leigh R. Sheppard, Rong Liu, Charles Christopher Sorrell, Pramod Koshy
Summary: Uniformly codoped anatase TiO2 thin films with equal Mo and Cr concentrations were fabricated using sol-gel spin coating and ion implantation. Both methods did not result in homogeneous dopant distributions, leading to decreased crystallinities and partial amorphisation. The photocatalytic performances of the films were poor and correlated with the band gap, indicating the effects of different doping methods on performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hayette Benkhennouche-Bouchene, Julien G. Mahy, Cedric Wolfs, Benedicte Vertruyen, Dirk Poelman, Pierre Eloy, Sophie Hermans, Mekki Bouhali, Abdelhafid Souici, Saliha Bourouina-Bacha, Stephanie D. Lambert
Summary: TiO2 prepared by a green aqueous sol-gel peptization process is co-doped with nitrogen and zirconium to improve and extend its photoactivity to the visible region. The co-doped sample shows significantly enhanced degradation of p-nitrophenol under visible light compared to undoped TiO2 and commercial P25 photocatalyst.
Article
Chemistry, Applied
Ndumiso Vukile Mdlovu, Nien-Che Yang, Kuen-Song Lin, Chi-Jung Chang, Khanh Toan Dinh, Yan-Gu Lin
Summary: In this study, tungsten-doped titania nanotubes (TNs) were prepared and showed enhanced reactivity towards the degradation of methylene blue and basic violet 3 under UV radiation. The doped TNs exhibited high surface areas and mesoporous fractions. The XPS and XANES/EXAFS spectra confirmed the presence of tungsten ions and titanium-oxygen-tungsten bonds in the doped TNs. Photodegradation experiments revealed that the 5% tungsten-doped TNs achieved optimal photocatalytic efficiencies for both methylene blue and basic violet 3.
Article
Materials Science, Ceramics
Petronela Pascariu, Corneliu Cojocaru, Mihaela Homocianu, Petrisor Samoila, Andrei Dascalu, Mirela Suchea
Summary: Pure TiO2 and La3+-doped TiO2 nanofibers were synthesized by electrospinning and calcination. The nanofibers showed crystalline structure and wide distribution of band-gaps. The optimal conditions for photocatalytic degradation of pollutants were determined to be 0.1% La3+ and 600 degrees C.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Xiaoling Cui, Huarong Liu, Xingyuan Zhang, Hewen Liu
Summary: Doping and forming highly porous structures are effective ways to enhance the photocatalytic performances of TiO2 particles. The hierarchical porous C/S/N-TiO2 microspheres prepared using a new method show high visible-light catalytic efficiency and excellent cycling stability.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Marta Jimenez-Salcedo, Miguel Monge, Maria Teresa Tena
Summary: TiO2 nanoparticles were modified to obtain photocatalysts with improved visible light activity for the degradation of ciprofloxacin. The materials showed superior performance compared to pristine TiO2 nanoparticles.
Article
Environmental Sciences
K. Yogesh Kumar, M. K. Prashanth, L. Parashuram, Baskaran Palanivel, Fahad A. Alharti, Byong-Hun Jeon, M. S. Raghu
Summary: This study successfully improved the detection and degradation efficiency of the fungicide CZM through the synthesis of a composite material. The composite material showed superior activity in electrochemical detection and light-driven degradation of CZM, with good stability and selectivity.
Article
Engineering, Environmental
Qingbin Pan, Jing Wang, Hongzhou Chen, Pengchao Yin, Qian Cheng, Zixuan Xiao, Yong-zhen Zhao, Hai-Bo Liu
Summary: This study successfully synthesized a novel piezo-photocatalyst and immobilized it on nanofibers using electrospinning, achieving simultaneous removal of nitrite and 4-chlorophenol. The optimized catalyst showed higher removal rates and improved stability and recyclability. Organic pollutants played a crucial role in the synergistic effect.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Fei Qi, Zequan Zeng, Qin Wen, Zhanggen Huang, Yali Wang, Yunhua Xu
Summary: In this study, N-doped activated carbon was used as a particle electrode to form a three-dimensional electroactivation system with persulfate (ACN/PS/EC) for the removal of p-chlorophenol. The synergy between electro-catalysis and ACN/PS not only accelerated the activation and degradation processes, but also changed the mechanism. The results showed that the radical pathway was significantly strengthened by using EC. Quantitative structure-activity relationship analysis revealed the vital role of graphitic N as an active center for persulfate activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
