摘要
采用酸性溶胶法制备钛柱撑前驱物,将该前驱物于500 ℃下焙烧3 h得到焙烧产物。使用XRD、FTIR和SEM等对柱撑产物的性能进行表征和分析,同时研究柱化反应的影响因素。结果表明:在一定范围内增大柱撑剂酸碱比、提高柱撑温度以及加入适量碱,有利于插层复合反应的进行和锐钛晶型的生长;柱撑前驱物焙烧后TiO2晶粒长大,同时焙烧引起的脱水导致膨润土层间距的下降;为获得较理想的产物,合适的柱化条件为:柱撑剂酸碱比n(NaOH) : n(HNO3)为1:3、柱撑温度65 ℃和柱撑液加碱量为(2 mol/L NaOH) 6 mL。
Ti-pillared precursor was prepared by acidic sol-gel method, then calcined at 500℃ for 3 h to get roasted products. XRD, FTIR and SEM were applied to characterize and analyze the pillared-products, and the influencing factors of pillaring were studied. The results indicate that the pillaring process and crystal growing of anatase can be more easily realized by increasing the acid-base ratio of pillaring agents, raising the pillaring temperature and adding proper quantities of alkali. The calcination of Ti-pillared precursor brings the growth of TiO2 grain, at the same time the layer distance is declined. In order to obtain ideal products, the right pillaring conditions are： the acid-base ratio of pillaring agents of 1：3, pillaring temperature of 65 ℃ and the volume of alkali （2 mol/L） in pillaring liquid of 6 mL.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2008年第3期535-540,共6页
The Chinese Journal of Nonferrous Metals
关键词
钛柱撑膨润土
酸性溶胶法
柱化
Ti-pillared bentonite
acidic sol-gel method
pillaring
