采用不同的老化介质(乙醇、异丙醇、叔丁醇),以钛酸丁酯为原料,利用溶胶-凝胶法,在常压干燥下制备出块体TiO2气凝胶.通过SEM、BET和XRD分析可知,以乙醇为老化介质制备的TiO2气凝胶具有最佳结构与性能.其制备态表观密度为0.16 g·cm-3,比表面积为554.6 m2·g-1,平均孔径为19.37 nm,孔容为0.71 cm3·g-1.经850℃处理2h后,比表面积为179.8m2 ·g-1,平均孔径为20.97 nm.该样品制备态为无定形态,经850℃处理2h后转变为锐钛矿.光催化实验表明:以乙醇为老化介质制备的TiO2气凝胶具有较好的光催化性能.
参考文献
| [1] | Fujishima A;Honda K .Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38. |
| [2] | 于向阳,梁文,杜永娟,程继健.二氧化钛光催化材料的应用进展[J].材料导报,2000(02):38-40. |
| [3] | 王玉栋,甘礼华,郝志显,陈龙武.气凝胶光催化剂的研究进展[J].化工科技,2005(03):36-40. |
| [4] | Size effects in liquid-phase photo-oxidation of phenol using nanometer-sized TiO_2 catalysts[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2008(5 Pt.2):2704. |
| [5] | 王非,陈晓红,胡子君,宋怀河.疏水SiO2气凝胶的制备及表征[J].硅酸盐通报,2008(06):1235-1239. |
| [6] | Pajonk G M .Aerogel catalysts[J].Applied Catalysis,1991,72:217-226. |
| [7] | Pajonk G M .Catalytic aerogels[J].Catalysis Today,1997,35(03):319-337. |
| [8] | 刘朝辉;苏勋家;侯根良 .热处理温度对TiO2气凝胶光催化剂的催化性能的影响[J].功能材料,2007,38(07):2489-2491. |
| [9] | J.Aguado-Serrano;M.L.Rojas-Cervantes .Titania aerogels Influence of synthesis parameters on textural,crystalline,and surface acid properties[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2006(1/3):205-213. |
| [10] | Baia L;Peter A;Cosoveanu V;Indrea E;Baia M;Popp J;Danciu V .Synthesis and nanostructural characterization of TiO2 aerogels for photovoltaic devices[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2006(0):512-516. |
| [11] | 卢斌,魏琪青,孙俊艳,周强,宋淼.常压制备低密度SiO2气凝胶的正交分析及表征[J].硅酸盐通报,2011(05):1000-1004,1009. |
| [12] | 胡久刚 .TiO<,2>气凝胶常压干燥法制备、改性及光催化性能研究[D].中南大学,2009. |
| [13] | Lorenz R;Peter W V.Growth and coarsening:Ostwald ripening in material processing[M].Berlin:Springer Berlin Heidelberg,2002:117-118. |
| [14] | 甘礼华,张宇星,陈龙武,葛奇.干燥控制化学添加剂在制备硅气凝胶中的应用[J].同济大学学报(自然科学版),2003(09):1131-1134. |
| [15] | Lucas EM;Doescher MS;Ebenstein DM;Wahl KJ;Rolison DR .Silica aerogels with enhanced durability, 30-nm mean pore-size, and improved immersibility in liquids[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2004(0):244-252. |
| [16] | 高鸿宾.有机化学[M].北京:高等教育出版社,2005:92-94. |
| [17] | 赵君霞.浅谈烷基的电子效应[J].西藏大学学报,2005(03):92-94. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%