Abstract
Cotton fabrics have been used in a variety of applications due to its attractive properties of softness, comfort, warmth, biodegradability and breathability. Coating cotton fabrics with photocatalytic materials can extend their use as self-cleaning and other practical applications. In this study, coating of cotton fabrics with dye sensitized/TiO2 for self-cleaning and UV blocking properties has been reported. Phthalocyanine based reactive dye, Reactive Blue-25 (RB-25), has been used as a visible light scavenger for TiO2. RB-25/TiO2 hybrid sol was prepared by sol–gel method and coated on the cotton fabrics via dip-pad-dry-cure method. The coated cotton fabric was characterized by FTIR-ATR, UV–Visible absorption, XRD, SEM and reflectance measurements. The surface studies confirmed the stable attachment of RB-25/TiO2 on the cotton fabric while photocatalytic and UV absorption studies shown that the RB-25/TiO2 coated cotton fabric exhibit substantial visible light driven self-cleaning and UV blocking properties. Rhodamine B (RhB) dye was used as to examine the photocatalytic efficiency of the coated cotton fabric. 91% RhB was degraded in 180 min when exposed to visible light in the presence of RB-25/TiO2 coated cotton fabric.
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Acknowledgments
This research study was supported by The Hong Kong Polytechnic University (Project code: account code: RTKV) which is greatly acknowledged, and we would also thank the Materials Research Centre, The Hong Kong Polytechnic University for providing the characterization facilities for this study.
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Ahmad, I., Kan, Cw. & Yao, Z. Reactive Blue-25 dye/TiO2 coated cotton fabrics with self-cleaning and UV blocking properties. Cellulose 26, 2821–2832 (2019). https://doi.org/10.1007/s10570-019-02279-2
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DOI: https://doi.org/10.1007/s10570-019-02279-2