Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 589, Issue -, Pages 25-33Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.12.112
Keywords
Self-template co-precipitation; CdxZn1-xS solid solutions; Sulfur defects; Mesoporous structure; photocatalytic H2 evolution
Categories
Funding
- National Natural Science Foundation of China [21875118]
- Candidate Research Innovation Fund of NKU School of Materials Science and Engineering
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The article introduces a facile and versatile synthesis method to prepare Cd-Zn-S solid solutions with abundant surface defects using co-precipitation, enhancing the photocatalytic water splitting activity.
The practical application of photocatalytic water splitting for hydrogen evolution hinges on the development of high-efficient and low-cost photocatalysts. Defects engineering has emerged as a promising strategy to enhance photocatalytic activity effectively. Herein, a facile and versatile co-precipitation method is proposed to fabricate mesoporous Cd-Zn-S solid solutions (E-CdxZn1-xS) with abundant surface defects by the inorganic salts formed in the reaction system as self-template. Compared with Cd-Zn-S solid solutions (W-Cd0.65Zn0.35S) prepared by the traditional co-precipitation method, the enhanced specific surface area and abundant surface defects endow E-Cd0.65Zn0.35S with more accessible active sites and effective separation of electron-hole pairs for the photocatalytic water splitting reaction. The E-Cd0.65Zn0.35S solid solution exhibits hydrogen evolution rate of 5.2 mmol h(-1) g(-1) without loading noble metal as cocatalyst under visible light, which is 1.13 times higher than that of W-Cd0.65Zn0.35S sample. The present work provides a simple, low-cost and prospective strategy for the synthesis of defective Cd-Zn-S solid solutions, and it also delivers guidance to design and develop the advanced visible-light photocatalyst in the future. (C) 2020 Elsevier Inc. All rights reserved.
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