Photothermal Enhanced Photocatalytic Properties of Titanium Dioxide (B)/Glass Fiber Cloth

doi:10.15541/jim20180547

Abstract

Abstract:

Titanium dioxide (B)/glass fiber cloth (B-T/GFC) composites with photothermal enhanced photocatalytic properties were prepared by using a facile chemical synthesis and Sol-Gel method, using the glass fiber cloth and TiH₂ as substrate and precursor, respectively. XRD, SEM and TEM were employed to investigate the composition, structure and morphology of B-T/GFC composite. Different properties of the materials were studied by spectrophotometer, optical contact angle measuring instrument and solar simulator. The results show that the composite surface is composed of anatase black TiO₂ with a disordercoating of about 1 nm. Meanwhile, the B-T/GFC composite with high hydrophobicity has strong absorption ability in the wavelength range from 250 nm to 2000 nm. Compared with glass fiber cloth, the B-T/GFC composite reveals better photothermal ability under sunlight with one solar intensity (1 kW/m ²). The photocatalytic degradation ability of B-T/GFC composite in organic pollutants cutting waste solution is better than those of pure black TiO₂ (B-T) and P25. After irradiation for 2 h, the degradation of COD over B-T/GFC composite is about 1.3 times higher than that of P25. The B-T/GFC composite possessing excellent photothermal enhanced photocatalytic properties performance may lead to a range of novel applications.

Key words: black titanium dioxide, Sol-Gel method, photothermal, photocatalysis

CLC Number:

TQ174

ZHU Ben-Bi,ZHANG Wang,ZHANG Zhi-Jian,ZHANG Jian-Zhong,IMRAN Zada,ZHANG Di. Photothermal Enhanced Photocatalytic Properties of Titanium Dioxide (B)/Glass Fiber Cloth[J]. Journal of Inorganic Materials, 2019, 34(9): 961-966.

Figures/Tables 7

Fig. 1 Different magnification SEM images of B-T/GFC (a-c), and the corresponding EDS pattern of B-T/GFC (d)

Fig. 2 XRD patterns of B-T/GFC, B-T and P25

Fig. 3 Different magnification TEM images (a,b), HRTEM image (c) of B-T/GFC , and SAED pattern of B-T/GFC (d)

Fig. 4 UV-Vis-NIR absorption spectra of P25, B-T/GFC and B-T

Fig. 5 Contact angles of (a) original glass fiber cloth and (b) B-T/GFC with water

Fig. 6 IR thermal images of GFC sample (a~c) and B-T/GFC sample (d-f) with light irradiation on for different time, (g) the surface temperature of the water of GFC and B-T/GFC samples after 60 min irradiation (g), and temperature profiles of the marked lines in the Fig. (c) and (f) (h)

Fig. 7 (a) Photocatalytic decomposition of COD under solar light irradiation catalyzed by P25/GFC, B-T/GFC and B-T powder, and (b) cycling runs for the photocatalytic decomposition of COD catalyzed by B-T/GFC

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