以钛酸四丁酯、正硅酸乙酯为前驱体,冰醋酸为水解抑制剂,用溶胶-凝胶法制备了纳米TiO_2/SiO_2复合粒子.将复合粒子按一定比例添加到醇酸清漆中,制备出自清洁涂层.光催化研究表明:SiO_2负载可明显提高涂层光催化活性,添加了2%(质量分数,下同)TiO_2/SiO_2粒子的涂层对茜素红的降解性能最好.利用气质联用仪对降解产物进行了分析.
Nano TiO_2/SiO_2 compound particles was prepared with sol-gel process using tetraethylorthos-ilicate and tetrabutylorthotitanate as precursors and glacial acetic acid as depressor. Which with a certain proportion was added into alkyd varnish to prepare the self-clean coatings. The photocatalysis investigation indicated that the photocatalytic activity of coatings were improved significantly by loading SiO_2, the coatings added with 2 percent (%) TiO_2/SiO_2 particles exhibited the best decomposition performance for alizarin red. The decomposition products were analyzed by GC-MS.
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