Enhanced solar absorption and photoelectrochemical properties of Al-reduced TiO2/TiO2−x/CdS heterojunction nanorods

Oxygen-deficient TiO2-based composites have attracted widespread attention due to their promoted light-harvesting capacity and energy conversion efficiency, beneficial for water splitting. Despite being a facile, secure-safe and undefiled route for preparing blackened TiO2, the Al-reduction method h...

Full description

Saved in:
Bibliographic Details
Published in:New journal of chemistry 2023-06, Vol.47 (22), p.10672-10678
Main Authors: Li, Xiao, Hou, Jingshan, Wang, Jing, Huang, Yanwei, Zhao, Guoying, Zhang, Ganghua, Fang, Yongzheng
Format: Article
Language:English
Subjects:
Cadmium sulfide
Composite materials
Electromagnetic absorption
Energy conversion efficiency
Energy harvesting
Heterojunctions
Nanorods
Photoelectric effect
Reduction
Titanium dioxide
Water splitting
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Oxygen-deficient TiO2-based composites have attracted widespread attention due to their promoted light-harvesting capacity and energy conversion efficiency, beneficial for water splitting. Despite being a facile, secure-safe and undefiled route for preparing blackened TiO2, the Al-reduction method has not been adopted for preparing TiO2/TiO2−x/CdS composite films. Herein, TiO2/TiO2−x/CdS composite nanorods were successfully fabricated by combining hydrothermal, Al-reduction and chemical bath deposition (CBD) techniques. Enhanced visible-light absorption and photoelectrochemical performances have been achieved using TiO2/TiO2−x/CdS heterojunction nanorods. The photocurrent density of TiO2/TiO2−x/CdS was obtained to be 7.75 mA cm−2 at 0 V vs. Ag/AgCl under AM 1.5 G illumination, which was 77.5-fold and 12.1-fold higher than those of bare TiO2 and CdS, respectively. This work may offer new insights for realizing TiO2-based composites with improved solar absorption for photoelectrochemical applications.
ISSN:1144-0546
1369-9261
DOI:10.1039/d3nj01610b