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    Sieve-Like CNT Film Coupled with TiO 2 Nanowire for High-Performance Continuous-Flow Photodegradation of Rhodamine B under Visible Light Irradiation

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    Authors
    Yang, Zhengpeng; email: zhengpengyang2013@163.com
    Lv, Xiaoting; email: 18339113590@163.com
    Liu, Xuqing; orcid: 0000-0001-5998-6546; email: xuqing.liu@manchester.ac.uk
    Jia, Shengmin; email: smjia2019@sinano.ac.cn
    Zhang, Yongyi; email: yyzhang2011@sinano.ac.cn
    Yu, Yingying; orcid: 0000-0002-6364-2831; email: yyyu2019@sinano.ac.cn
    Zhang, Chunjing; email: chunjingzhang2013@163.com
    Liu, Dandan; email: ddliu2015@sinano.ac.cn
    Publication Date
    2021-05-19
    
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    Abstract
    Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO2 nanowire film (SCTF) with superior flexibility (180° bending), high tensile strength (75–82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 µm in diameter, as well as a homogenous distribution of TiO2 nanowires with an average diameter of ca. 500 nm, could act as a “waterway” for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min−1. The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.
    Citation
    Nanomaterials, volume 11, issue 5, page e1335
    Publisher
    MDPI
    URI
    http://hdl.handle.net/10034/624656
    Type
    article
    Description
    From MDPI via Jisc Publications Router
    History: accepted 2021-05-14, pub-electronic 2021-05-19
    Publication status: Published
    Funder: National Key Research and Development Program of China; Grant(s): 2016YFA0203301
    Funder: National Natural Science Foundation of China; Grant(s): 51862035, 52062048
    Funder: the Science and Technology Project of Jiangxi Province; Grant(s): 20192BCD40017, 20192ACB80002, S2018LQCQ0016, 2017-SJSYS-008
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