Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 553, Issue -, Pages 758-767Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.06.077
Keywords
Carbon dot; 3DOM TiO2; Efficient electron-hole separation; Photocatalysis
Categories
Funding
- Natural Science Foundations of China [21875048, 21576056, 21576057]
- Guangdong Natural Science Foundation [2017A030311016, 2017A030313255]
- Science and Technology Research Project of Guangdong Province [2016A010103043]
- Major Scientific Project of Guangdong University [2017KZDXM059]
- Featured Innovation Project of Guangdong University [2017KTSCX146]
- Science and Technology Research Project of Guangzhou [201804010047]
- Guangzhou University [BJ201704]
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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. (C) 2019 Elsevier Inc. All rights reserved.
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