光热增强光催化性能二氧化钛(B)/玻纤布复合研究

以玻璃纤维布为基底, 以TiH₂为原料, 通过简易的化学合成及溶胶-凝胶法制备了光热增强光催化性能的二氧化钛(B)/玻璃纤维布复合材料(B-T/GFC)。通过XRD、SEM和TEM检测合成材料的成分、结构和形貌, 采用分光光度计、光学接触角测量仪、太阳光模拟器对材料的性能进行了系统研究。结果表明: 该复合材料表面形成了锐钛矿晶型的黑色TiO₂薄膜, 且晶体中存在厚度约为1 nm的无序层。同时该复合材料在250~2000 nm波长范围内具有较强的光吸收能力, 且具有强疏水性; 在 1 个太阳光强度下(1 kW/m ²), 相对于玻璃纤维布具有更强的光热能力; 其光催化降解切削废液中有机污染物(COD)的能力优于黑色TiO₂(B-T)和P25, 光照2 h的降解率约为P25的2.3倍。由此可见, B-T/GFC复合材料具有优异的光热增强光催化性能, 具有广阔的应用前景。

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

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.