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Fabrication of H‐TiO 2 /CdS/Cu 2‐ x S Ternary Heterostructures for Enhanced Photocatalytic Hydrogen Production
Author(s) -
Chu Jiayu,
Han Xijiang,
Yu Zhen,
Du Yunchen,
Song Bo,
Xu Ping
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700419
Subject(s) - photocatalysis , ternary operation , heterojunction , materials science , hydrogen production , water splitting , catalysis , band gap , noble metal , fabrication , photocatalytic water splitting , hydrogen , chemical engineering , nanotechnology , optoelectronics , metal , chemistry , medicine , biochemistry , alternative medicine , organic chemistry , pathology , computer science , metallurgy , programming language , engineering
Solar‐driven photocatalytic water splitting is a promising technology to produce H 2 energy. Herein, we demonstrate the fabrication of a ternary catalyst, H‐TiO 2 /CdS/Cu 2‐ x S, by chemical bath deposition and ion exchange for efficient photocatalytic water splitting, based on hydrogenated TiO 2 (H‐TiO 2 ) with roughened surface and hollow structures. The as‐prepared H‐TiO 2 /CdS/Cu 2‐ x S ternary structure can make use of the full solar spectrum and have a better response to the near infrared region. The tuned bandgap alignments in this ternary heterostructure enable efficient separation of photogenerated electrons and holes, leading to a hydrogen production rate as high as 261.54 μmol⋅g −1 ⋅h −1 without noble metal as co‐catalyst. Meanwhile, a photocatalytic hydrogen production rate of 210.63 μmol⋅g −1 ⋅h −1 can be maintained after five cycles. We believe this fabricated noble metal‐free ternary heterostructure catalyst has a great potential in solar energy conversion with improved solar energy absorption and efficient electron‐hole separation.