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Phosphorus‐doped Isotype g‐C 3 N 4 /g‐C 3 N 4 : An Efficient Charge Transfer System for Photoelectrochemical Water Oxidation
Abstract Constructing isotype g‐C 3 N 4 /g‐C 3 N 4 heterojunction is an approach to improve the efficiency of g‐C 3 N 4 towards solar‐assisted oxidation of water. Such functional configuration can effectively overcome the intrinsic drawback of rapid charge recombination of g‐C 3 N 4 . Here, a modifi...
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Published in: | ChemCatChem 2019-01, Vol.11 (2), p.729-736 |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Abstract
Constructing isotype g‐C
3
N
4
/g‐C
3
N
4
heterojunction is an approach to improve the efficiency of g‐C
3
N
4
towards solar‐assisted oxidation of water. Such functional configuration can effectively overcome the intrinsic drawback of rapid charge recombination of g‐C
3
N
4
. Here, a modified g‐C
3
N
4
, with homogeneous phosphorus doping, is prepared in this work through a phosphide‐involved gas phase reaction. The resulting P‐g‐C
3
N
4
displays altered electronic structure, including upshifted band edge potential, narrowed band gap and improved electronic conductivity. These features allow P‐g‐C
3
N
4
as an outstanding candidate to form isotype junction with pristine g‐C
3
N
4
. As expected, the accelerated charge separation and migration in target junction is validated by various measurements. The optimized isotype g‐C
3
N
4
/P‐g‐C
3
N
4
heterojunction achieves a photocurrent as high as 0.3 mA cm
−2
at 1.23 V vs RHE (AM 1.5G, 100 mW cm
−2
), representing 8‐fold's enhancement compared with pristine g‐C
3
N
4
. The present strategy for constructing g‐C
3
N
4
‐based isotype heterojunction networks is found effective for large‐scale manufacturing. |
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ISSN: | 1867-3880 1867-3899 |
DOI: | 10.1002/cctc.201801581 |