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Rh/polymeric carbon nitride porous tubular catalyst: visible light enhanced chlorophenol hydrodechlorination in base-free aqueous medium

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Abstract

A self-assembled novel porous tubular Rh/polymeric carbon nitride (PCN) photocatalyst was prepared by a simple impregnation reduction method. Both SEM and XRD revealed that PCN was dispersed and curled in an alcohol–water mixture during the impregnation process; Rh/PCN further self-assembled into a novel porous tubular structure in the course of NaBH4 reduction. Small Rh(0) nanoparticles were uniformly dispersed on the self-assembled PCN (TEM), which was beneficial for improving the separation efficiency of photogenerated electrons and holes, enhancing light absorption and facilitating the photocatalytic hydrodechlorination (HDC) process. Highly promoted catalytic activity (3.12 fold promotion in TOF) and excellent reusability could be achieved in the chlorophenol HDC under ambient base-free conditions with visible light. The harmful chlorophenols were easily converted to high-value cyclohexanol and cyclohexanone in the catalytic process. In combination with a series of characterization techniques, a possible mechanism of Rh/PCN photocatalytic HDC was proposed.

Graphical abstract: Rh/polymeric carbon nitride porous tubular catalyst: visible light enhanced chlorophenol hydrodechlorination in base-free aqueous medium

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Publication details

The article was received on 07 Sep 2019, accepted on 04 Nov 2019 and first published on 05 Nov 2019


Article type: Paper
DOI: 10.1039/C9CY01816F
Catal. Sci. Technol., 2019, Advance Article

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    Rh/polymeric carbon nitride porous tubular catalyst: visible light enhanced chlorophenol hydrodechlorination in base-free aqueous medium

    J. Xu, S. Zhang, X. Liu, F. Bian and H. Jiang, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01816F

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