Flexible PAN-BiOI-AgI heterojunction nanofiber and the photocatalytic degradation property

Pingping Teng, Zhiang Li, Shuai Gao, Kang Li, Nigel Copner, Zhihai Liu, Xinghua Yang, Enming Zhao, Yu Zhang, Tao Geng, Fengjun Tian

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In this paper, the flexible polyacrylonitrile (PAN) nanofibers are used as carriers to prepare one-dimensional bismuth oxyiodide-silver iodide (BiOI-AgI) photocatalyst. PAN-BiOI-AgI is prepared on the surface of electrospun PAN nanofibers by alternate growth method and subsequent ion exchange method at room temperature. The results of XRD, TEM, XPS, and UV-Vis diffuse reflectance spectroscopy indicate the heterojunctions formation. The flexible PAN-BiOI-AgI heterojunction fibers show higher photocatalytic degradation efficiency for rhodamine B than PAN-BiOI or PAN-AgI. The enhanced photocatalytic performance is attributed to that the heterojunction improves the photo-generated electron-hole separation efficiency. After 60 min of visible light irradiation, the degradation efficiency is greater than 95%. Free radical capture experiments show that•O2- and h+ are the main groups involved in the oxidation reaction.
Original languageEnglish
Pages (from-to)1031-1042
Number of pages12
JournalOptical Materials Express
Issue number3
Early online date15 Feb 2022
Publication statusPublished - 1 Mar 2022


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