Open AccessSrSnO3-Assembled MWCNT Heterojunctions for Superior Hydrogen Production under Visible Light
Author(s) -
Mohammad W. Kadi,
Reda M. Mohamed
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c04143
Subject(s) - photocatalysis , materials science , heterojunction , visible spectrum , chemical engineering , carbon nanotube , absorption (acoustics) , nanoparticle , hydrogen production , charge carrier , semiconductor , nanotechnology , band gap , hydrogen , catalysis , composite material , optoelectronics , chemistry , organic chemistry , engineering
A one-step sol-gel method for SrSnO 3 nanoparticle synthesis and the incorporation of multi-walled carbon nanotubes (MWCNTs) to produce a SrSnO 3 @MWCNT photocatalyst is presented. The incorporation of MWCNTs results in enhancement of structural, optical, and optoelectrical properties of SrSnO 3 . The optimized 3.0% addition of MWCNTs results in light absorption enhancement and a reduction of the band gap from 3.68 to 2.85 eV. Upon application of the photocatalyst in the photocatalytic hydrogen production reaction, SrSnO 3 @MWCNT-3.0% yields 4200 μmol g -1 of H 2 in just 9 h with the use of 1.6 g L -1 of the photocatalyst. SrSnO 3 @MWCNT exhibits remarkable chemical and photocatalytic stability upon regeneration. Enhanced photocatalytic ability is attributed to improved surface properties and charge-carrier recombination suppression induced by the MWCNT addition. This study highlights the remarkable improvements in chemical and physical properties of semiconductors with MWCNT incorporation.