TiO_2气凝胶光催化剂的制备和表征  

Preparation and characterization of TiO_2 aerogels

作　　者：钟长荣[1] 苏勋家[1] 侯根良[1] 刘朝辉[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《化工新型材料》2006年第S1期59-62,共4页New Chemical Materials

摘　　要：通过加入甲酰胺,用溶胶-凝胶法制备了强度较好的块状TiO2气凝胶,并考察了样品在200℃下真空热处理10h的相变情况,样品的表观密度为0.474g/cm3,凝胶时间为15~23min,比表面积为152m2/g,微孔的体积为0.0388cm3/g,微孔的面积为66.1746m2/g,样品的最可几半径是5.7140nm,平均孔径为7.1843nm,样品的绝大多数孔属于介孔,孔体积为0.341cm3/g。分析了甲酰胺对TiO2气凝胶品质的影响情况,甲酰胺使TiO2气凝胶的密度有所降低,强度和比表面积都得到提高,凝胶时间变长。Monolithic and hard TiO_2 aerogels were prepared by adding HCONH_2 and sol-gel method.The crystal distortion was studied when the samples were heated at 200℃ for 10 hours.The apparent density of the samples was 0.474 g/cm^3,the gelatin time was 15~23min,BET surface area was 152m^2/g,micropore volume was 0.0388cm^3/g,micropore area was 66.1746m^2/g,the most possible aperture was5.7140nm,the average aperture was 7.1843nm,most pores were mesopores,the pore volume was 0.341cm^3/g.The effect of HCONH_2 to the qu...

关 键 词：TiO2气凝胶 比表面积 吸附-脱附等温线 制备 

分 类 号：O643.36[理学—物理化学]