超疏水金红石型纳米钛硅复合氧化物的制备与表征
发布时间：2018-10-10 13:37
【摘要】：以正硅酸乙酯为硅源、钛酸异丙酯为钛源,采用改进的溶胶-凝胶法制备了不同钛硅摩尔比的复合气凝胶,在不同温度下进行煅烧,得到金红石型钛硅(TiO_2-SiO_2)复合氧化物纳米颗粒,然后通过三甲基氯硅烷(TMCS)改性,制得超疏水金红石型TiO_2-SiO_2纳米材料。探讨了钛硅摩尔比和煅烧温度对钛硅复合氧化物纳米颗粒晶型的影响,并通过XRD、XPS、BET、SEM和FTIR等手段对产物进行了表征,采用水接触角测试(WCA)对纳米材料改性后的疏水性能进行了表征。结果表明:当钛硅摩尔比为5:1时制得的气凝胶在1100℃煅烧及TMCS改性后,所制备的超疏水金红石型纳米钛硅复合氧化物的比表面积大,疏水性能优异,其比表面积达348 m~2·g~(-1),水接触角达到154.7°,在构建具有纳微分层结构的外墙装饰材料的面漆方面具有潜在的应用前景。
[Abstract]:Using ethyl orthosilicate as silicon source and isopropyl titanate as titanium source, composite aerogels with different molar ratios of titanium and silicon were prepared by an improved sol-gel method. Rutile titanium-silicon (TiO_2-SiO_2) composite oxide nanoparticles were obtained by calcination at different temperatures. Then the ultrahydrophobic rutile TiO_2-SiO_2 nanomaterials were prepared by trimethylchlorosilane (TMCS) modification. The effects of molar ratio of titanium to silicon and calcination temperature on the crystalline morphology of titanium-silicon composite oxide nanoparticles were discussed. The products were characterized by XRD,XPS,BET,SEM and FTIR. The hydrophobicity of the modified nanocrystals was characterized by water contact angle test (WCA). The results show that when the molar ratio of titanium to silicon is 5:1, the prepared aerogels calcined at 1100 鈩，
本文编号：2261986
[Abstract]:Using ethyl orthosilicate as silicon source and isopropyl titanate as titanium source, composite aerogels with different molar ratios of titanium and silicon were prepared by an improved sol-gel method. Rutile titanium-silicon (TiO_2-SiO_2) composite oxide nanoparticles were obtained by calcination at different temperatures. Then the ultrahydrophobic rutile TiO_2-SiO_2 nanomaterials were prepared by trimethylchlorosilane (TMCS) modification. The effects of molar ratio of titanium to silicon and calcination temperature on the crystalline morphology of titanium-silicon composite oxide nanoparticles were discussed. The products were characterized by XRD,XPS,BET,SEM and FTIR. The hydrophobicity of the modified nanocrystals was characterized by water contact angle test (WCA). The results show that when the molar ratio of titanium to silicon is 5:1, the prepared aerogels calcined at 1100 鈩，
本文编号：2261986
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2261986.html
