Premium
Synergistic effect of Ag/ MoS 2 / TiO 2 heterostructure arrays on enhancement of photoelectrochemical and photocatalytic performance
Author(s) -
Liu Zhu,
Xu Kang,
Yu Hai,
Sun Zhaoqi
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6275
Subject(s) - heterojunction , photocatalysis , photocurrent , materials science , nanorod , photodegradation , hydrothermal circulation , visible spectrum , titanium dioxide , nanoparticle , absorption edge , band gap , photoelectrochemistry , optoelectronics , nanotechnology , chemical engineering , electrochemistry , chemistry , electrode , catalysis , composite material , biochemistry , engineering
Summary In this paper, to improve the usage of visible light in titanium dioxide nanorod arrays (TNR), MoS 2 /TiO 2 heterostructure arrays modified with Ag nanoparticles are successfully synthesized by hydrothermal and photodeposition methods. The morphology, microstructure, photoelectrochemical and photocatalytic properties of samples are discussed. The experimental results show that Ag/MoS 2 /TNR can effectively extend the absorption edge of visible light, retard the charge recombination and reduce the interface resistance, which greatly enhances the performance of photoelectrochemistry and photocatalysis. When the hydrothermal reaction time is 12 h, the sample exhibits the best transient photocurrent (120 μA/cm 2 ) and photodegradation efficiency (75%); the values are 12 and 5 times than those of bare TNR, respectively. Based on the above results, the synergistic effect of MoS 2 /TiO 2 heterostructure, surface plasmon resonance of Ag nanoparticles and narrow bandgap of MoS 2 is proposed to explain the enhancement of these properties.