期刊
RSC ADVANCES
卷 11, 期 60, 页码 38120-38125出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra05894k
关键词
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资金
- National Natural Science Foundation of China [21908113, 22035003, 22005153, 91856124]
- China Postdoctoral Science Foundation [2019M660979]
- Frontiers Science Center for New Organic Matter [63181206]
By growing ZnCdS quantum dots in situ on a g-C3N4 support, the aggregation behavior caused by high surface energy was effectively suppressed. The heterojunction of ZnCdS and g-C3N4 showed excellent optical absorption, abundant reactive sites, and efficient separation of photogenerated electrons and holes, resulting in significantly improved photocatalytic hydrogen production performance.
To suppress the aggregation behavior caused by the high surface energy of quantum dots (QDs), ZnCdS QDs were grown in situ on a g-C3N4 support. During the growth process, the QDs tightly adhered to the support surface. The ZnCdS QDs were prepared by low-temperature sulfurization and cation exchange with a zeolitic imidazolate framework precursor under mild conditions. The heterojunction of g-C3N4/ZnCdS-2 (CN/ZCS-2, with a g-C3N4 to ZIF-8 ratio of 2.0) not only showed excellent optical absorption performance, abundant reactive sites, and a close contact interface but also effectively separated the photogenerated electrons and holes, which greatly improved its photocatalytic hydrogen production performance. Under visible light irradiation (wavelength > 420 nm) without a noble metal cocatalyst, the hydrogen evolution rate of the CN/ZCS-2 heterojunction reached 1467.23 mu mol g(-1) h(-1), and the durability and chemical stability were extraordinarily high.
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