In Situ Construction of Bronze/Anatase TiO2 Homogeneous Heterojunctions and Their Photocatalytic Performances

Photocatalytic degradation is one of the most promising emerging technologies for environmental pollution control. However, the preparation of efficient, low-cost photocatalysts still faces many challenges. TiO2 is a widely available and inexpensive photocatalyst material, but improving its catalyti...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-03, Vol.12 (7), p.1122
Main Authors: Li, Yong, Zhang, Ming-Qing, Liu, Yan-Fang, Sun, Ya-Xun, Zhao, Qing-Hua, Chen, Tian-Lu, Chen, Yuan-Fu, Wang, Shi-Feng
Format: Article
Language:English
Subjects:
Anatase
anatase TiO2
bronze TiO2
Bronzes
Carrier mobility
Electromagnetic absorption
Heterojunctions
homogeneous heterojunctions
New technology
Performance degradation
Photocatalysis
photocatalyst
Photocatalysts
photocatalytic degradation
Photodegradation
Pollution control
Recombination
Scanning electron microscopy
Temperature
Titanium dioxide
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Summary:Photocatalytic degradation is one of the most promising emerging technologies for environmental pollution control. However, the preparation of efficient, low-cost photocatalysts still faces many challenges. TiO2 is a widely available and inexpensive photocatalyst material, but improving its catalytic degradation performance has posed a significant challenge due to its shortcomings, such as the easy recombination of its photogenerated electron–hole pairs and its difficulty in absorbing visible light. The construction of homogeneous heterojunctions is an effective means to enhance the photocatalytic performances of photocatalysts. In this study, a TiO2(B)/TiO2(A) homogeneous heterojunction composite photocatalyst (with B and A denoting bronze and anatase phases, respectively) was successfully constructed in situ. Although the construction of homogeneous heterojunctions did not improve the light absorption performance of the material, its photocatalytic degradation performance was substantially enhanced. This was due to the suppression of the recombination of photogenerated electron–hole pairs and the enhancement of the carrier mobility. The photocatalytic ability of the TiO2(B)/TiO2(A) homogeneous heterojunction composite photocatalyst was up to three times higher than that of raw TiO2 (pure anatase TiO2).
ISSN:2079-4991
2079-4991
DOI:10.3390/nano12071122