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Catalysts 2017, 7(7), 194; doi:10.3390/catal7070194

Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability

1
College of Physics and Electronic Information Engineering, Qinghai University for Nationalities, Xining 810007, China
2
Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Tianyi Ma, Jian-Rong (Jeff) Li and Cláudia Gomes Silva
Received: 3 May 2017 / Revised: 12 June 2017 / Accepted: 19 June 2017 / Published: 24 June 2017
(This article belongs to the Special Issue Nanostructured Materials for Applications in Heterogeneous Catalysis)
View Full-Text   |   Download PDF [1863 KB, uploaded 24 June 2017]   |  

Abstract

Herein, a novel CdS nanocomposite is fabricated by a facile one-pot hydrothermal method assisted by glucose and polyvinylpyrrolidone (PVP). The as-prepared CdS is coated with a thin layer, which is determined to be hydrothermal carbonation carbon (HTCC) mainly containing semiconductive polyfuran. The as-prepared HTCC-coated CdS shows superior photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation (λ ≥ 420 nm). The optimum sample (glucose content of 0.1 g) shows a degradation rate four-times that of pure CdS reference. Moreover, it also shows an improved stability, and the activity can be maintained at 96.2% after three cycles of recycling. The enhanced photocatalytic activity and stability of nanocomposite can mainly be attributed to: (i) The addition of PVP in the reaction solution can significantly increase the specific surface area of CdS and thus offer more active sites; (ii) The HTCC in the nanocomposite can expand the range of light absorption; (iii) The HTCC layer can form a heterojunction with CdS and improve the charge separation and transfer. View Full-Text
Keywords: CdS; hydrothermal carbonation carbon; nanocomposite; photocatalysis CdS; hydrothermal carbonation carbon; nanocomposite; photocatalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ma, Y.; Zhao, Z.; Shen, Z.; Cai, Q.; Ji, H.; Meng, L. Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability. Catalysts 2017, 7, 194.

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