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Highly stable metal-organic framework derived phosphorus doped carbon/Cu2O structure for efficient photocatalytic phenol degradation and hydrogen production

Abstract

Developing a low cost processed but efficient photocatalyst with maximum utilization of sunlight, minimum charge carrier recombination and improved stability is very crucial and challenging. Triphenylphosphine modification of HKUST-1 followed by conditioned calcination resulted a phosphorus doped carbon/Cu2O composite (HKUST-1-P-300). The structure and band properties were fully studied, and phenol degradation and H2 evolution were employed to evaluate the photocatalytic activity. Under visible light irradiation, HKUST-1-P-300 showed superior photocatalytic activity and stability. A phenol degradation efficiency of up to 99.8% was achieved within 90 minutes, and also a remarkable H2 evolution rate of 1208 µmol was achieved. The external quantum efficiency of solar hydrogen evolution over this photocatalyst, without noble metal loading, reaches 48.6% at 425 nm. More auspiciously, the photocatalytic reaction continued for more than 12 h without performance degradation. To get further evidence about the origin of the improved photoactivity of the HKUST-1-P-300, a series of characterization has been carried out. To the best of our knowledge, this is the first and highest performance reported using phosphorus doped carbon/Cu2O for phenol degradation and H2 evolution. Mechanistic studies were carried out to give insights into the photodegradation process, and the superior photocatalytic activity of HKUST-1-P-300 can be ascribed to enhanced visible light absorption efficiency, higher surface area, efficient separation of photogenerated charge carriers, reduced aggregation of Cu2O and synergistic effect of the P-doped carbon/Cu2O structures. The work demonstrates a facile and promising approach in designing low cost, highly stable and efficient heterostructured photocatalysts that can be applicable for energy and environmental applications.

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Publication details

The article was received on 31 Dec 2018, accepted on 08 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C8TA12544A
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Highly stable metal-organic framework derived phosphorus doped carbon/Cu2O structure for efficient photocatalytic phenol degradation and hydrogen production

    A. A. Dubale, I. N. Ahmed, X. Chen, C. Ding, G. Hou, R. Guan, X. Meng, M. Xie and X. Yang, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C8TA12544A

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