Abstract
Sn2+ self-doped SnO2 (SnO2−x) nanocrystal and SnO2−x/graphene oxide (SnO2−x/GO) composite photocatalyst were prepared by hydrothermal method and characterized by transmission electron microscope, energy dispersive X-ray, X-ray diffraction, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy, photocurrent and photocatalytic activity. SnO2−x/GO was hydroxylated with 3,4-dihydroxy phenyl acetic acid to obtain the carboxylated SnO2−x/GO. Cotton fabrics were cationically modified by 3-chloro-2 hydroxy propyltrim ethylammonium chloride and then finished with the carboxylated SnO2−x/GO composite photocatalyst. Cotton fabrics were characterized by SEM, XPS and self-cleaning activity. Photocatalytic activity of SnO2−x/GO composite photocatalyst and self-cleaning activity of cotton fabrics were evaluated by photocatalytic degradation of methyl orange solution and methylene blue solution under the visible light, respectively. Photocatalytic activity of SnO2−x/GO composite photocatalyst firstly increased and then decreased with the increasing molar ratio of Sn4+/Sn, and the GO concentration in SnO2−x/GO. The optimal molar ratio of Sn4+/Sn and GO concentration were 1:4 and 5%, respectively. The SnO2−x/GO finished cotton fabrics exhibited highly efficient and durable self-cleaning activity. In addition, the mechanism for SnO2−x/GO photocatalytic activity, and the mechanism and possible reactions for the chemically binding of SnO2−x/GO composite photocatalyst with cotton fabrics were proposed.
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This work was supported by Open Project Program of Fujian Key Laboratory of Novel Functional Textile Fibers and Materials (No. FKLTFM1919), Production, Education and Research Cooperative Innovation Fund Project of Jiangsu Province (No. FZ20180669), Joint Open Fund of Jiangsu Collaborative Innovation Center for Ecological Building Material and Environmental Protection Equipments, Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province (No. JH201863).
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Qi, Z., Wang, K., Jiang, Y. et al. Preparation and characterization of SnO2−x/GO composite photocatalyst and its visible light photocatalytic activity for self-cleaning cotton fabrics. Cellulose 26, 8919–8937 (2019). https://doi.org/10.1007/s10570-019-02662-z
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DOI: https://doi.org/10.1007/s10570-019-02662-z