Direct Z-scheme CdO-CdS nanorod arrays photoanode: Synthesis, characterization and photoelectrochemical performance

Impact Factor:

1.114

DOI number:

10.1063/1674-0068/cjcp1905090

Journal:

Chin. J. Chem. Phys.

Key Words:

Catalysts and Catalysis Chemical synthesis Calcination Nanorods Photoconductivity

Abstract:

Direct Z-scheme CdO-CdS 1-dimensional nanorod arrays were constructed through a facile and simple hydrothermal process. The structure, morphology, photoelectrochemical properties and H2 evolution activity of this catalyst were investigated systematically. The morphology of the obtained nanorod is a regular hexagonal prism with 100-200 nm in diameter. The calcination temperature and time were optimized carefully to achieve the highest photoelectrochemical performance. The as-fabricated hybrid system achieved a photocurrent density up to 6.5 mA/cm2 and H2 evolution rate of 240 µmol·cm−2·h−1 at 0 V vs. Ag/AgCl, which is about 2-fold higher than that of the bare CdS nanorod arrays. The PEC performance exceeds those previously reported similar systems. A direct Z-scheme photocatalytic mechanism was proposed based on the structure and photoelectrochemical performance characterization results, which can well explain the high separation efficiency of photoinduced carriers and the excellent redox ability.

Co-author:

Zhi-min Song, Jing-jing Dong, Zhi-yu Wang, Yue Yang, Xiao-di Zhu, Song Sun

First Author:

Yi Fan

Correspondence Author:

Chen Gao,Jun Bao

Volume:

32

Issue:

6

Page Number:

715-720

ISSN No.:

1674-0068

Translation or Not:

no

Date of Publication:

2020-01-07

Links to published journals:

https://doi.org/10.1063/1674-0068/cjcp1905090