A Facile Approach to Prepare Black TiO₂ with Oxygen Vacancy for Enhancing Photocatalytic Activity

Black TiO₂ has triggered worldwide research interest due to its excellent photocatalytic properties. However, the understanding of its structure-property relationships and a more effective, facile and versatile method to produce it remain great challenges. We have developed a facile approach to synt...

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Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2018-04, Vol.8 (4), p.245
Main Authors: Chen, Shihao, Xiao, Yang, Wang, Yinhai, Hu, Zhengfa, Zhao, Hui, Xie, Wei
Format: Article
Language:English
Subjects:
black TiO2
Catalytic activity
Coloration
Electromagnetic absorption
Irradiation
Light irradiation
Methylene blue
Nanoparticles
Oxygen
oxygen vacancies
Photocatalysis
photodegradation
Recombination
Rhodamine
Titanium dioxide
Ultraviolet radiation
Vacancies
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cited_by cdi_FETCH-LOGICAL-c475t-dd5c1971d17d36c98a73c8560e7a6e36554855eee46e60bf1c0c7d45581f41583
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container_issue 4
container_start_page 245
container_title Nanomaterials (Basel, Switzerland)
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creator Chen, Shihao
Xiao, Yang
Wang, Yinhai
Hu, Zhengfa
Zhao, Hui
Xie, Wei
description Black TiO₂ has triggered worldwide research interest due to its excellent photocatalytic properties. However, the understanding of its structure-property relationships and a more effective, facile and versatile method to produce it remain great challenges. We have developed a facile approach to synthesize black TiO₂ nanoparticles with significantly improved light absorption in the visible and infrared regions. The experimental results show that oxygen vacancies are the major factors responsible for black coloration. More importantly, our black TiO₂ nanoparticles have no Ti ions. These oxygen vacancies could introduce localized states in the bandgap and act as trap centers, significantly decreasing the electron-hole recombination. The photocatalytic decomposition of both rhodamine B and methylene blue demonstrated that, under ultraviolet light irradiation, better photocatalytic performance is achieved with our black TiO₂ nanoparticles than with commercial TiO₂ nanoparticles.
doi_str_mv 10.3390/nano8040245
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subjects black TiO2
Catalytic activity
Coloration
Electromagnetic absorption
Irradiation
Light irradiation
Methylene blue
Nanoparticles
Oxygen
oxygen vacancies
Photocatalysis
photodegradation
Recombination
Rhodamine
Titanium dioxide
Ultraviolet radiation
Vacancies
title A Facile Approach to Prepare Black TiO₂ with Oxygen Vacancy for Enhancing Photocatalytic Activity
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