scholarly journals Activation of Peroxymonosulfate by Oxygen Vacancies-Enriched Cobalt-Doped Black TiO2 Nanotubes for the Removal of Organic Pollutants

2019 ◽  
Vol 53 (12) ◽  
pp. 6972-6980 ◽  
Author(s):  
Jonghun Lim ◽  
Yang Yang ◽  
Michael R. Hoffmann
Keyword(s):  
Organic Pollutants ◽  
Tio2 Nanotubes ◽  
Oxygen Vacancies ◽  
Black Tio2

Effect of oxygen vacancies and crystal symmetry on piezocatalytic properties of Bi2WO6 ferroelectric nanosheets for wastewater decontamination

2021 ◽  
Author(s):  
Zihan Kang ◽  
Enzhu Lin ◽  
Ni Qin ◽  
Jiang Wu ◽  
Baowei Yuan ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Oxygen Vacancies ◽  
Mechanical Energy ◽  
Crystal Symmetry ◽  
Characteristic P ◽  
Novel Technique ◽  
Effect Of Oxygen

Piezocatalysis emerged as a novel technique to make use of mechanical energy in dealing with organic pollutants in wastewater. In this work, the ferroelectric Bi2WO6 (BWO) nanosheets with a characteristic...

scholarly journals Treatment of Polyaniline Wastewater by Coupling of Photoelectro-Fenton and Heterogeneous Photocatalysis with Black TiO2 Nanotubes

ACS Omega ◽  
2019 ◽  
Vol 4 (6) ◽  
pp. 9664-9672 ◽  
Author(s):  
Bin Ou ◽  
Jixiao Wang ◽  
Ying Wu ◽  
Song Zhao ◽  
Zhi Wang
Keyword(s):  
Tio2 Nanotubes ◽  
Heterogeneous Photocatalysis ◽  
Black Tio2

Black TiO2−x with stable surface oxygen vacancies as the support of efficient gold catalysts for water-gas shift reaction

2018 ◽  
Vol 8 (5) ◽  
pp. 1277-1287 ◽  
Author(s):  
Lei Li ◽  
Li Song ◽  
Longfeng Zhu ◽  
Zheng Yan ◽  
Xuebo Cao
Keyword(s):  
Oxygen Vacancies ◽  
Electron Flow ◽  
Catalytic Performance ◽  
Water Gas Shift ◽  
Hot Electron ◽  
Surface Oxygen ◽  
Water Gas Shift Reaction ◽  
Black Tio2 ◽  
Shift Reaction ◽  
Water Gas

H2-etching engineered oxygen vacancies on black TiO2−x to enhance the hot-electron flow and water-gas shift catalytic performance of Au catalysts.

The role of oxygen vacancy over ZnCr-layered double oxide in enhancing solar light-driven photocatalytic degradation of bisphenol A

2018 ◽  
Vol 15 (4) ◽  
pp. 226 ◽  
Author(s):  
Meiqing Chen ◽  
Pingxiao Wu ◽  
Qianqian Wei ◽  
Yajie Zhu ◽  
Shanshan Yang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
Organic Pollutants ◽  
Oxygen Vacancies ◽  
Solar Light ◽  
X Ray ◽  
Vis Spectroscopy

Environmental contextAn important goal in attempts to degrade environmental organic pollutants is the development of a photocatalyst that is responsive to visible light. We report a facile method for preparing a zinc-based photocatalyst with oxygen vacancies that efficiently degrades bisphenol A under solar light irradiation. The study will stimulate further investigations into the efficacy of other metal oxide nanostructures for the photocatalytic degradation of organic pollutants. AbstractTwo ZnCr-layered double oxides (ZnCr-LDO) were fabricated via different thermal treatment of the ZnCr-layered double hydroxide (ZnCr-LDH) precursor. ZnCr-V-700 and ZnCr-A-700 were obtained at 700 °C under vacuum and air, respectively. As X-ray diffraction revealed, both ZnCr-V-700 and ZnCr-A-700 were made up of ZnO and ZnCr2O4 spinel, and ZnCr-V-700 displayed a lower crystallinity and many uniform particles with oxygen vacancies. Scanning electron microscopy and transmission electron microscopy revealed that the particle size of ZnCr-V-700 was ~30 nm and its disordered crystallinity suggested the existence of oxygen vacancies. Notably, the ZnCr-LDO materials showed remarkably enhanced photocatalytic activity compared to the ZnCr-LDH precursor. ZnCr-V-700 was the most active material and more than 90 % of BPA was degraded after irradiation for 200 min with high mineralisation (up to 37 %). The results of Brunauer–Emmett–Teller surface area analysis, X-ray photoelectron spectroscopy, Raman and UV-vis spectroscopy and electron paramagnetic resonance spectroscopy showed that oxygen vacancies incorporated into ZnCr-V-700 played a key role in improving the photocatalytic performance by enhancing interfacial charge transfer and restricting the charge recombination. In addition, the uniform particle size, larger surface area and the coexistence of ZnO and ZnCr2O4 also played a synergistic role. In conclusion, this work not only provides a facile and low-cost method to prepare photocatalysts for treatment of wastewater containing BPA, but also supplies a new idea for improving the performance of photocatalysts.

Oxygen vacancies and phase tuning of self-supported black TiO2-X nanotube arrays for enhanced sodium storage

2020 ◽  
Vol 400 ◽  
pp. 125784 ◽  
Author(s):  
Jun Chen ◽  
Yanlong Fu ◽  
Fang Sun ◽  
Zhengguang Hu ◽  
Xing Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Nanotube Arrays ◽  
Black Tio2 ◽  
Phase Tuning ◽  
Sodium Storage

Noble-Metal-Free Photocatalytic H2 Generation: Active and Inactive ‘Black’ TiO2 Nanotubes and Synergistic Effects

2016 ◽  
Vol 22 (39) ◽  
pp. 13810-13814 ◽  
Author(s):  
Ning Liu ◽  
Christopher Schneider ◽  
Detlef Freitag ◽  
Eva M. Zolnhofer ◽  
Karsten Meyer ◽  
...  
Keyword(s):  
Noble Metal ◽  
Tio2 Nanotubes ◽  
Synergistic Effects ◽  
Metal Free ◽  
H2 Generation ◽  
Black Tio2 ◽  
Photocatalytic H2 Generation

Monodisperse Ag–AgBr nanocrystals anchored on one-dimensional TiO2 nanotubes with efficient plasmon-assisted photocatalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 68653-68662 ◽  
Author(s):  
Chao Xue ◽  
Xiaoqing Yan ◽  
Shujiang Ding ◽  
Guidong Yang
Keyword(s):  
Organic Pollutants ◽  
Tio2 Nanotubes ◽  
High Performance ◽  
Photocatalytic Performance ◽  
One Dimensional ◽  
Very High

A novel ternary Ag–AgBr/TiO2 plasmonic nanotube heterojunction photocatalyst was fabricated, showing a very high-performance for decomposition of organic pollutants.

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