Preparation and Characterization of Self-cleaning Cotton Fabric†

doi:10.7503/cjcu20170171

Abstract

Abstract:

Self-cleaning cotton fabric with bared and modified TiO₂ nanoparticles on the surface was achieved by ultraviolet radiation and ultrasonic wave. The surface morphology, element distribution, photocatalytic activity, ultraviolet screening performance of original and modified cotton fabric were systematically investigated with scanning electron microscope(SEM), energy dispersive spectrometer(EDS), contact angle, ultraviolet-visible absorption spectrometry and photocatalytic degradation of methyl orange(MO). The results show that the adhesion between cotton fabric and nanoparticles has been enhanced after UV irradiation, as well as loaded stability and wash resistance. Cotton fabric with TiO₂nanoparticles on the surface shows super-hydrophobic behavior, excellent photocatalytic activity and UV screening property. Compared with the bared TiO₂ nanoparticles, TiO₂ nanoparticles modified by polyvinyl alcohol(PVA) shows 3.9 times higher photocatalytic activity in the visible light regime. In addition, a higher UV-Vis absorption in the region of 290—400 nm wavelength can be observed for the modified TiO₂ nanoparticles, thereby exhibiting a better UV screening performance.

Key words: Cotton fabric, TiO2 nanoparticles modified by polyvinyl alcohol, Photocatalytic performance, Self-cleaning material

CLC Number:

O636
O643

TrendMD:

YANG Ziwei, ZHOU Shunli, WANG Rui, WANG Feng, JIANG Yan, ZHANG Xiuqin. Preparation and Characterization of Self-cleaning Cotton Fabric^†[J]. Chem. J. Chinese Universities, 2017, 38(10): 1880.

Figures/Tables 9

Fig.1 XRD patterns of pristine TiO2(a) and M-TiO2(b) nanoparticles

Fig.2 FTIR spectra of pristine TiO2(a) and M-TiO2(b) nanoparticles

Fig.3 SEM(A—C) and EDS(D—F) images of cotton fabric without UV irradiation loading TiO2(A, D), cotton fabric by UV irradiation loading TiO2 (TiO2-cotton)(B, E) and M-TiO2(M-TiO2-cotton)(C, F)

Fig.4 SEM images of samples before(A—C) and after(D—F) washing(A, D) Cotton fabric without UV irradiation loading TiO2; (B, E) cotton fabric by UV irradiation loading TiO2(TiO2-cotton); (C, F) M-TiO2(M-TiO2-cotton).

Fig.5 Variation of MO concentration during four cycles of cotton fabric by UV irradiation loading TiO2(■) and M-TiO2(●), cotton fabric without UV irradiation loading TiO2(▲) and M-TiO2(▼)

Fig.6 Surface water contact angle of pure cotton(A), TiO2-cotton(B), M-TiO2-cotton(C) and the model of sample surface structure(D)Insets are TEM images of TiO2 and M-TiO2.

Fig.7 Variation of MO concentration under visible lighta. Pure cotton; b. TiO2-cotton; c. M-TiO2-cotton.

Fig.8 Linear regression of photocatalytic degradation rate and time of TiO2-cotton(a) and M-TiO2-cotton(b)

Fig.9 UV-Vis diffuse reflectance spectra of pure cotton(a), TiO2-cotton(b) and M-TiO2-cotton(c)

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