微波法合成介孔WO3·NiO·0.33H2O及光催化降解气相甲醛Synthesis of mesoporous WO3·NiO·0.33H2O using microwave irradiation method and photocatalytic degradation of gaseous formaldehyde
邹丽霞,刘庆成,董丽君,徐琼,熊小青
摘要(Abstract):
以复合表面活性剂为模板,采用微波辐射、二甲苯萃取脱除模板剂法制备了介孔材料WO3.0.33H2O、WO3.NiO.0.33H2O,利用XRD、TGA、TEM、BET等手段表征了材料的结构、形貌、比表面积、孔径分布。结果表明,微波辐射比传统加热法制备的材料晶粒小,结晶度高,孔径分布更均匀,比表面积更大;制备的材料WO3.NiO.0.33H2O介孔呈现蠕虫状,掺杂Ni2+能稳定介孔结构,抑制晶粒长大,其比表面积达66.37m2.g-1。分别以WO3.NiO.0.33H2O催化剂考察在紫外光(UV)、黑光灯、可见光3种光源下对气相甲醛光催化降解反应动力学规律及紫外光下的催化稳定性,其光催化降解气相甲醛降解率为传统加热法样品的3倍,在可见光下达76.8%。
关键词(KeyWords): 微波辐射;介孔;WO3.0.33H2O;掺杂Ni2+;光催化
基金项目(Foundation): 江西省自然科学基金(BK2007060);; 化工过程资源有效利用国家重点实验室开放课题(2008-03)
作者(Author): 邹丽霞,刘庆成,董丽君,徐琼,熊小青
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