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Engineering Zn1–xCdxS/CdS Heterostructures with Enhanced Photocatalytic Activity

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journal contribution
posted on 12.05.2016 by Kui Li, Rong Chen, Shun-Li Li, Shuai-Lei Xie, Long-Zhang Dong, Zhen-Hui Kang, Jian-Chun Bao, Ya-Qian Lan
Various porous Zn1–xCdxS/CdS heteorostructures were achieved via in situ synthesis method with organic amines as the templates. Because of the larger radius of Cd2+ than that of Zn2+, CdS quantum dots are formed and distributed uniformly in the network of Zn1–xCdxS. The Zn1–xCdxS/CdS heterostructure with small Cd content (10 at%) derived from ethylenediamine shows very high H2-evolution rate of 667.5 μmol/h per 5 mg photocatalyst under visible light (λ ≥ 420 nm) with an apparent quantum efficiency of 50.1% per 5 mg at 420 nm. Moreover, this Zn1–xCdxS/CdS heterostructure photocatalyst also shows an excellent photocatalytic stability over 100 h.