Highly efficient sustainable photocatalytic Z-scheme hydrogen production from an α-Fe2O3 engineered ZnCdS heterostructure

被引：89

作者：

Imran, M. ^{[1
]}

Yousaf, Ammar Bin ^{[1
,2
]}

Kasak, Peter ^{[2
]}

Zeb, Akif ^{[1
]}

Zaidi, Syed Javaid ^{[2
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Qatar Univ, Ctr Adv Mat, Doha 2713, Qatar

来源：

JOURNAL OF CATALYSIS | 2017年 / 353卷

关键词：

Z-scheme water splitting; Photocatalysis; Hydrogen production; alpha-Fe2O3; Zn-0 Cd-4(0) S-6; H-2; EVOLUTION; WATER; NANOPARTICLES; PERFORMANCE; GENERATION; COMPOSITE; FE2O3;

D O I：

10.1016/j.jcat.2017.06.019

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：

We present an alpha-Fe2O3/Zn0.4Cd0.6S heterostructure that shows visible light photocatalytic H-2 production as high as 536.8 mu mol h(-1) with apparent quantum efficiency of 11.2% at 420 nm. The UV-vis diffuse reflectance spectra of as-synthesized alpha-Fe2O3/Zn0.4Cd0.6S heterostructure reveal efficient absorption in the visible region, which is a key factor in the enhanced catalytic activity. Moreover, the increase in charge separation efficiency of alpha-Fe2O3/Zn0.4Cd0.6S suggested by electrochemical impedance spectroscopy and photocurrent response also results in enhanced photocatalytic H-2 production. The interface contact between alpha-Fe2O3 and Zn0.4Cd0.6S ascertained from HRTEM images promotes the recombination of photogenerated electrons from the conduction band of alpha-Fe2O3 and holes from the valence band of Zn0.4Cd0.6S, thus enhancing the utilization of solar light and increasing the efficiency. Our coupling approach to synthesizing an efficient Z-scheme photocatalyst provides insight into the design of further solar energy utilization photocatalysts. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：81 / 88

页数：8

共 37 条

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