Fabrication of a NiCo2O4/Zn0.1Cd0.9S p-n heterojunction photocatalyst with improved separation of charge carriers for highly efficient visible light photocatalytic H2 evolution

被引：73

作者：

Tang, Yunxiang ^{[1
]}

Zhang, Dafeng ^{[1
]}

Qiu, Xiaoxue ^{[1
]}

Zeng, Lei ^{[1
]}

Huang, Baoxu ^{[1
]}

Li, Hong ^{[1
]}

Pu, Xipeng ^{[1
]}

Geng, Yanling ^{[2
]}

机构：

[1] Liaocheng Univ, Sch Mat Sci & Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252000, Shandong, Peoples R China

[2] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Shandong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 809卷

关键词：

p-n heterojunction; NiCo2O4/Zn0.1Cd0.9S; Photocatalytic; Hydrogen evolution; GRAPHITIC CARBON NITRIDE; HYDROGEN-PRODUCTION; HIERARCHICAL PHOTOCATALYST; DECORATED G-C3N4; WATER; DEGRADATION; COMPOSITE; CDS; REDUCTION;

D O I：

10.1016/j.jallcom.2019.151855

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalytic hydrogen (H-2) evolution is a greatly promising strategy for solar to H-2 conversion. However, photocatalytic activity of single photocatalyst is limited due to the fast recombination of photogenerated charge carriers. Recently, various heterojunction photocatalysts have been constructed to improve photocatalytic activity. Herein, a novel NiCo2O4/Zn0.1Cd0.9S (NCO/ZCS) p-n heterojunction photocatalyst was fabricated via a simple calcination method. The optimized NiCo2O4 content is 3 wt%, and corresponding NCO/ZCS shows the maximum H-2 evolution rate of 34.4 mmol g(-1) h(-1) under visible light irradiation, which is over 4.9 times higher than that of pure ZCS, and has the apparent quantum efficiency of 58.8% at 420 nm. The improved photoactivity of NCO/ZCS can be attributed to the construction of NCO/ZCS p-n heterojunction. In addition, a possible mechanism for photocatalytic H-2 evolution of NCO/ZCS p-n heterojunction was proposed. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：10

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