Novel visible-light-driven direct Z-scheme CdS/CuInS2 nanoplates for excellent photocatalytic degradation performance and highly-efficient Cr (VI) reduction

被引：179
|
作者：
Deng, Fang [1 ]
Lu, Xiaoying [1 ]
Luo, Yingbo [1 ]
Wang, Jie [1 ]
Che, Wenjie [1 ]
Yang, Ruijie [1 ]
Luo, Xubiao [1 ]
Luo, Shenglian [1 ]
Dionysiou, Dionysios D. [2 ]
机构：
[1] Nanchang Hangkong Univ, Key Lab Jiangxi Prov Persistent Pollutants Contro, Nanchang 330063, Jiangxi, Peoples R China
[2] Univ Cincinnati, DBCEE, Cincinnati, OH 45221 USA
来源：
CHEMICAL ENGINEERING JOURNAL | 2019年 / 361卷
关键词：
CdS/CuInS2; Z-scheme heterojunction; Visible-light photocatalysis; Photocatalytic degradation; Cr(VI) reduction; Pharmaceutical wastewater; ELECTRON MEDIATOR; QUANTUM DOTS; THIN-FILM; HETEROJUNCTION; REMOVAL; CR(VI); CUINS2; NANOPARTICLES; FABRICATION; CONVERSION;
D O I：
10.1016/j.cej.2018.10.176
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A series of visible-light-driven direct Z-scheme CdS/CuInS2 nanoplates were fabricated by a facile one-step hydrothermal method, and the molar ratio of CdS to CuInS2 was optimized. The highest visible-light photocatalytic degradation activity of Z-scheme (1: 0.03) CdS/CuInS2 heterojunction is about 4 times than that of pure CuInS2, which is due to the narrowest band gap, the largest BET surface area, the most efficient charge separation and transfer, and the synergistic effect between CdS and CuInS2. Meanwhile, Z-scheme (1: 0.03) CdS/CuInS2 heterojunction also exhibits excellent photocatalytic reduction activity with almost 100% of aqueous Cr (VI) reduction efficiency in absence of hole scavengers after 60 min. The special significance is that Z-scheme (1: 0.03) CdS/CuInS2 heterojunction shows excellent stability in five degradation cycles, and can effectively treat real pharmaceutical wastewater with 76.5% COD removal efficiency with aid of H2O2 in 13 h, indicating that Z-scheme CdS/CuInS2 has a promising prospect in real pharmaceutical wastewater treatment.
引用
收藏
页码：1451 / 1461
页数：11
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