Journal
NANOSCALE
Volume 14, Issue 33, Pages 12077-12089Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nr02671f
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Funding
- Chinese National Natural Science Foundation [22062001]
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This study improves the hydrogen evolution activity by constructing a phosphorus-doped graphdiyne/zinc-cadmium sulfide heterojunction photocatalyst. The graphite alkyne material serves as a substrate to anchor the bimetallic sulfide-zinc-cadmium sulfide, resulting in a close contact 2D/0D heterojunction interface.
Graphdiyne (GDY) is a new type of carbon allotrope material with a network structure composed of sp- and sp(2)-hybridized carbon, and its excellent photoelectrochemical properties have an extraordinary impact on energy materials. In this work, a graphite alkyne material was calcined and used as an anchor substrate to fix bimetallic sulfide-zinc-cadmium sulfide to form a phosphorus-doped graphdiyne (GDY-P)/zinc-cadmium sulfide (ZnCdS) heterojunction photocatalyst. The close contact between the 2D/0D binary heterojunction interfaces produced a strong interfacial force, and the final hydrogen evolution rate of the GDY-P/ZnCdS structure reached 10 395.57 mu mol g(-1) h(-1), which was 2.57 and 240 times those of ZnCdS and GDY, respectively. The S-scheme heterojunction constructed by GDY-P and ZnCdS accelerates the formation of electron-hole pairs, improves the utilization of strongly reduced electrons, and overcomes the self-agglomeration of ZnCdS, ensuring the high hydrogen evolution activity of the binary structure. This work provides a new application paradigm for the construction of S-scheme heterojunctions for hydrogen evolution using new carbon materials in the field of photocatalysis.
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