二氧化钛空心微球的制备及在光催化降解有机色素方面的应用

Preparation of Hollow Titania Microspheres and Its Application in Photocatalytic Degradation of Organic Pigment

采用溶胶-凝胶法将纳米二氧化钛(Ti O2)粒子负载于氨基化的交联聚苯乙烯(PS-DVB)微球表面,得到一种核壳型复合材料,分别经过氮气和空气气氛下煅烧,最终得到一种稳定的二氧化钛空心微球(HTS)结构。用红外光谱仪(FIRT)、扫描电镜(SEM)、X射线粉末衍射仪、比表面积(BET)对中间产物及最终产物进行了表征。结果显示制备的空心微球结构稳定,具有较高的比表面积(约76.5m2/g),是具有高光催化活性的锐钛矿结构。通过光催化降解有机色素红宝石蓝的研究,证明产物在处理工业染料废水方面具有很好的应用前景。

Stable hollow titania microsphere（HTS） was fabricated in a sol–gel process by coating of titania precursor titanium tetrabutoxide（TBOT） onto modified（-NH2）Porous Polystyrene cross-linked divinyl benzene（PS-DVB） microspheres template, followed by calcining in argon nitrogen and then in the air. The intermediate and final products were characterized by Infrared spectroscopy（FIRT）, scanning electron microscopy（SEM）, X-ray powder diffraction, specific surface area（BET）. The resultant stable HTS（diameter 4-5μm） features a high specific surface area（76.5 m^2/g）, and thus leads to a high photocatalysis. And the experiments photocatalytic degradation of MG was conducted under UV light irradiation, which showed a high photocatalysis ability. It can therefore be potentially applied for the treatment of water contaminated by organic pollutants.