Construction of hierarchical ZnIn2S4@PCN-224 heterojunction for boosting photocatalytic performance in hydrogen production and degradation of tetracycline hydrochloride

By Peng Jin, Lei Wang, Xiaolei Ma, R. Lian, Jingwei Huang, H. She, Mingyi Zhang, Mingyi Zhang, Qizhao Wang. 2021

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Abstract As a typical member of sulfide family, ZnIn2S4 bears impressive activity in photocatalysis. Nonetheless, egregious recombination of photo-excited electron and hole pairs confines its practical usage. In this study, PCN-224, a metal organic framework (MOF) composed of porphyrin linkers and Zr clusters, is employed to establish a novel hierarchical structured ZnIn2S4@PCN-224 via a solvothermal method. These as-prepared composites are further evaluated by visible-light-driven photocatalysis and able to present steady performance. The optimized ZnIn2S4@PCN-224 has a hydrogen production rate of 0.284 mmol h−1 in absence of Pt, higher than many contrastive ZnIn2S4-based photocatalysts even in assistance of Pt cocatalyst. Besides, it is able to dominate the degradation of tetracycline hydrochloride (TCH), giving 99.9 % pollutant removal within 60 min, about 4.7 times higher than that catalyzed by ZnIn2S4. It is supposed that the great improvement in photocatalysis is ascribable to the establishment of Z-scheme junction between ZnIn2S4 and PCN-224.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/8ec62ecc44dbd6a83a8cd7ef3c9ebfa9751b99c8