(中南大學(xué) 資源加工與生物工程學(xué)院 無(wú)機(jī)材料系， 長(zhǎng)沙 410083)
摘 要: 以硝酸鈰（Ce(NO3)3·6H2O）、 碳酸銨（(NH4)2CO3·H2O）為原料， 十六烷基三甲基溴化銨（CTAB）為模板劑，采用化學(xué)沉淀法合成了一系列具有不同孔徑的介孔CeO2粉末， 使用X射線衍射（XRD）、 差示/熱重（DSC/TG）、 BET孔性能測(cè)試、 透射電鏡（TEM）及紅外光譜（IR）分析等手段對(duì)合成產(chǎn)物進(jìn)行了分析和表征， 探討了CTAB與Ce的摩爾比、 反應(yīng)溫度、 焙燒溫度和時(shí)間對(duì)孔徑大小和比表面積的影響。在CTAB與Ce的摩爾比為1∶1、 反應(yīng)溫度為80 ℃、 焙燒溫度為300 ℃、 焙燒時(shí)間為1 h條件下， 制得了比表面積為132 m2/g的介孔CeO2。
關(guān)鍵字: 介孔氧化鈰； 沉淀法； 比表面積
YANG Hai-pin, QIU Guan-zhou
（Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract: Mesoporous CeO2 powders with different pore sizes were synthesized by chemical precipitation method with cerium nitrate and ammonium carbonate as raw materials and cetyltrimethyl ammonium bromide（CTAB）as templates. X-ray diffractometry (XRD), different scanning calorimetry/thermalgravimetry (DSC/TG), BET method, transmission electron microscopy (TEM) and infrared (IR) absorbance were used to analyze and characterize the products. The effects of some factors, such as the mole ratio of CTAB to Ce, reaction temperature, calcination temperature and calcination time, on porous size and specific surface area were investigated. Mesoporous CeO2 with specific surface area of 132 m2/g was made under the condition as: the ratio of CTAB to Ce 1∶1, the reaction temperature 80 ℃, the calcination temperature 300 ℃ and the calcination time 1 h.
Key words: mesoporous CeO2; precipitation method; specific surface area
