Carbon dots decorated three-dimensionally ordered macroporous bismuth-doped titanium dioxide with efficient charge separation for high performance photocatalysis

[Display omitted] Fast recombination of photo-generated carriers and limited photo-response have greatly hindered the development of TiO2-based photocatalysts. Herein, we present a ternary three-dimensionally ordered macroporous (3DOM) carbon dots (CDs)/Bi:TiO2 photocatalyst, which affords well-desi...

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Bibliographic Details
Published in:Journal of colloid and interface science 2019-10, Vol.553, p.758-767
Main Authors: Li, Jing-Feng, Zhong, Chu-Yao, Huang, Jia-Rong, Chen, Yibo, Wang, Zhu, Liu, Zhao-Qing
Format: Article
Language:English
Subjects:
3DOM TiO2
Carbon dot
Efficient electron-hole separation
Photocatalysis
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Summary:[Display omitted] Fast recombination of photo-generated carriers and limited photo-response have greatly hindered the development of TiO2-based photocatalysts. Herein, we present a ternary three-dimensionally ordered macroporous (3DOM) carbon dots (CDs)/Bi:TiO2 photocatalyst, which affords well-designed charge transmission and allows broad-spectrum absorption, thus delivering enhanced photocatalytic performance. The carbon dots act as effective electron extractors to accelerate the separation of electron-hole pairs, and pore engineering of the 3DOM Bi:TiO2 skeleton greatly promotes the response of light in the whole solar spectrum range. Impressively, the 3DOM CDs/Bi:TiO2 catalyst exhibits a greatly enhanced photocatalytic degradation performance toward phenol (92.7% in 2 h), and RhB (96.4% in 40 min) under full-spectra illumination, compared to the pristine 3DOM TiO2. This work provides a new design strategy for the optimization of carriers transmission pathway in high-quality and low-cost photocatalysts.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.06.077