共被期刊论文引用了2次
您的检索式：您选中1篇文献正在查看引证文献汇总
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 化学包覆法制备TiO_2/SiO_2复合物显示文摘与TiO2光催化剂相比,以SiO2为载体或内核制备的TiO2/SiO2复合催化剂,其表面活性、光催化活性和热稳定性都更高。以粉煤灰为原料制备的沉淀SiO2为硅源,钛酸四丁酯为钛源,采用化学包覆法制备TiO2/SiO2复合物,采用扫描电镜(XRD)、红外光谱(FT-IR)和差热分析(TG-DTA)等测试手段对该复合物进行表征。FT-IR和TG-DTA分析证实,SiO2被TiO2有效包覆。复合物热稳定性较高,经700℃焙烧4 h后,SiO2仍为无定形,TiO2以锐钛矿相为主;在900℃焙烧后,TiO2大部分由锐钛矿相转变为金红石相。 | 姚志通 夏枚生 叶瑛 | 2010 | 粉末冶金材料科学与工程2010，15，5： | 1 |
| 2 | Surface chemical structure of titania-silica nanocomposite powder显示文摘Titania-silica (TS) nanocomposite powder with three different composite structures, containing 10―30 mol% SiO2 in each structure, have been prepared by sol-gel processes. The surface characteristics of these titania-silica samples have been investigated by X-ray photo-emission spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). The study for all TS oxides annealed at 773 and 1173 K showed: an abnormal surface enrichment in Si increased with increasing annealing temperature; the Ti3+, Ti2+, Si3+ and Si2+ oxides coexisted with Ti4+ and Si4+ oxides, and the contents of these Ti/Si suboxides increased with increasing SiO2 content and annealing temperature; there was a layer rich in O on the topmost surface and the excess O could be attributed to the chemadsorption of H2O; different composite structures could lead to different contents of Ti/Si suboxides. These results indi- cated that the surface of TS oxide powder derived by sol-gel process was a double layer with enriched O first and then SiOx/TiOy (x, y<2). Ti/Si suboxides could result from the thermal diffusion of Ti4+ and Si4+, which might be induced by the strong interaction between Ti4+ and Si4+. | WANG LuYan SUN YanPingi XU BingShe | 2008 | Chinese Science Bulletin2008，53，19： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员