Highly visible-light absorbing black TiO2 nanocrystals synthesized by sol-gel method and subsequent heat treatment in low partial pressure H2

Ming Chung Wu; I. Chun Chang; Kai Chi Hsiao; Wei Kang Huang

doi:10.1016/j.jtice.2016.02.026

Highly visible-light absorbing black TiO₂ nanocrystals synthesized by sol-gel method and subsequent heat treatment in low partial pressure H₂

Ming Chung Wu^*, I. Chun Chang, Kai Chi Hsiao, Wei Kang Huang

^*Corresponding author for this work

Department of Chemical and Materials Engineering

Chang Gung University

Research output: Contribution to journal › Journal Article › peer-review

22 Scopus citations

Abstract

We present here a novel method for producing highly visible-light absorbing black TiO₂ nanocrystals by combining sol-gel synthesis and subsequent heat treatment in low partial pressure H₂. The synthesized black TiO₂ nanocrystals with trivalent titanium, oxygen vacancies and structural defects show a significantly lowered optical bandgap in reference to white TiO₂. Photodegradation of methyl orange under visible light irradiation indicates the synthesized black TiO₂ is superior to the commercial TiO₂-P25. The developed process is simple, cost-effective, safe and allows producing a series of visible spectrum active catalysts without the need for metal doping or decoration.

Original language	English
Pages (from-to)	430-435
Number of pages	6
Journal	Journal of the Taiwan Institute of Chemical Engineers
Volume	63
DOIs	https://doi.org/10.1016/j.jtice.2016.02.026
State	Published - 01 06 2016

Bibliographical note

Publisher Copyright:
© 2016 Taiwan Institute of Chemical Engineers.

Keywords

Nanostructures
Photocatalyst
Photodegradation
TiO

Access to Document

10.1016/j.jtice.2016.02.026

Cite this

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title = "Highly visible-light absorbing black TiO2 nanocrystals synthesized by sol-gel method and subsequent heat treatment in low partial pressure H2",

abstract = "We present here a novel method for producing highly visible-light absorbing black TiO2 nanocrystals by combining sol-gel synthesis and subsequent heat treatment in low partial pressure H2. The synthesized black TiO2 nanocrystals with trivalent titanium, oxygen vacancies and structural defects show a significantly lowered optical bandgap in reference to white TiO2. Photodegradation of methyl orange under visible light irradiation indicates the synthesized black TiO2 is superior to the commercial TiO2-P25. The developed process is simple, cost-effective, safe and allows producing a series of visible spectrum active catalysts without the need for metal doping or decoration.",

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AU - Wu, Ming Chung

AU - Chang, I. Chun

AU - Hsiao, Kai Chi

AU - Huang, Wei Kang

PY - 2016/6/1

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N2 - We present here a novel method for producing highly visible-light absorbing black TiO2 nanocrystals by combining sol-gel synthesis and subsequent heat treatment in low partial pressure H2. The synthesized black TiO2 nanocrystals with trivalent titanium, oxygen vacancies and structural defects show a significantly lowered optical bandgap in reference to white TiO2. Photodegradation of methyl orange under visible light irradiation indicates the synthesized black TiO2 is superior to the commercial TiO2-P25. The developed process is simple, cost-effective, safe and allows producing a series of visible spectrum active catalysts without the need for metal doping or decoration.

AB - We present here a novel method for producing highly visible-light absorbing black TiO2 nanocrystals by combining sol-gel synthesis and subsequent heat treatment in low partial pressure H2. The synthesized black TiO2 nanocrystals with trivalent titanium, oxygen vacancies and structural defects show a significantly lowered optical bandgap in reference to white TiO2. Photodegradation of methyl orange under visible light irradiation indicates the synthesized black TiO2 is superior to the commercial TiO2-P25. The developed process is simple, cost-effective, safe and allows producing a series of visible spectrum active catalysts without the need for metal doping or decoration.

KW - Nanostructures

KW - Photocatalyst

KW - Photodegradation

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