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Pyrolysis‐Synthesized g‐C 3 N 4 /Nb 2 O 5 Nanocomposite for Enhanced Photocatalytic Activity under White LED Light Irradiation
Author(s) -
Devarayapalli Kamakshaiah Charyulu,
Prabhakar Vattikuti Surya Veerendra,
Madhukar Sreekanth Thupakula Venkata,
Chidanandha Nagajyothi Patnamsetty,
Shim Jaesool
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902943
Subject(s) - photocatalysis , materials science , hydrogen production , heterojunction , nanocomposite , hydrogen , visible spectrum , photochemistry , chemical engineering , nanotechnology , optoelectronics , chemistry , catalysis , organic chemistry , engineering
The design and fabrication of highly active visible‐light‐driven photocatalysts have been received considerable attention in recent years. However, individual component‐based photocatalysts are limited in their use because of the high recombination of photoinduced carriers and poor chemical stability. Herein, the Z‐scheme‐originated photocatalytic activity of in‐situ deposited Nb 2 O 5 NPs on the plane surface of carbon nitride (g‐C 3 N 4 ) nanosheets (i. e. CN‐NbO) heterostructures was studied using a simple thermal pyrolysis method. The as‐synthesized photocatalysts distinctly manifested efficient white light‐emitting diode (LED) light irradiation toward organic malachite green (MG) dye degradation and photocatalytic hydrogen generation. The CN‐NbO heterostructure showed a faster degradation rate of the MG dye and a higher photocatalytic hydrogen evolution rate. In addition, the plausible Z‐scheme photocatalytic mechanism for photocatalytic hydrogen production under LED light irradiation was discussed. Photoelectrochemcial studies showed that the superior photoactivity of CN‐NbO heterostructure is mainly a result of the suitable alignment of the band edge positions, which diminish carrier recombination and facilitate efficient interfacial charge transport at their interface. This study provides an ideal method for in‐situ fabrication of novel two dimensional/one dimension‐based photocatalysts with high activity and stable performance for photocatalytic hydrogen generation.