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Issue 44, 2019
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pH-Controlled photocatalytic abatement of RhB by an FeWO4/BiPO4 p–n heterojunction under visible light irradiation

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Abstract

A novel p–n heterostructure of an FeWO4/BiPO4 nanocomposite was designed and synthesized through a simple hydrothermal method. Among all the nanocomposites prepared with different weight percentages of FeWO4, 30% FeWO4/BiPO4 (S3) showed the highest photocatalytic performance for the degradation of Rhodamine B and tetracycline under visible light irradiation. The degradation efficiency of RhB for the S3 sample was 87% under neutral conditions within 300 min but interestingly, at pH 3, 99% degradation efficiency was observed within 30 min with good recyclability. The enhanced photocatalytic performance should be due to the maximum electron–hole pair decoupling efficiency of the S3 catalyst. The mineralization of RhB during the catalytic process was detected by GC-MS. Consequently, based on the experimental results, a possible photocatalytic mechanism over the FeWO4/BiPO4 composite was anticipated, which indicated the substantial potential of the composite for the treatment of textile and pharmaceutical wastewater.

Graphical abstract: pH-Controlled photocatalytic abatement of RhB by an FeWO4/BiPO4 p–n heterojunction under visible light irradiation

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Publication details

The article was received on 17 Aug 2019, accepted on 10 Oct 2019 and first published on 11 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ04263F
New J. Chem., 2019,43, 17241-17250

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    pH-Controlled photocatalytic abatement of RhB by an FeWO4/BiPO4 p–n heterojunction under visible light irradiation

    N. Mahendran, S. Udayakumar and K. Praveen, New J. Chem., 2019, 43, 17241
    DOI: 10.1039/C9NJ04263F

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