摘要
以膨润土为原料通过水热合成法制备硅铝分子筛,并在其表面负载WO_(3)、MnO_(2)制备了WO_(3)/MnO_(2)/硅铝分子筛复合催化剂,研究了其孔结构、微观形貌、钨锰存在形式和分布、对甲醛的降解性能。结果表明,WO_(3)/MnO_(2)/硅铝分子筛以介孔结构存在,其孔径分布在4~5nm,比表面积大,达1665.0m2/g,而WO_(3)、MnO_(2)均匀分布在催化剂表面及内部结构中。由于WO_(3)/MnO_(2)/硅铝分子筛特殊的介孔结构、较大的比表面积和其表面钨、锰氧化物纳米颗粒均匀分散,在吸附和化学催化共同作用下,该复合催化剂在室温时对甲醛具有良好的降解性能,甲醛去除率可达92.0%。
In this work,WO_(3)/MnO_(2)/silicon aluminum molecular sieve catalyst was prepared by hydrothermal synthesis using bentonite as raw material.The pore structure,microstructure,the form and distribution of tungsten and manganese and the degradation performance of formaldehyde were investigated.The results show that the WO_(3)/MnO_(2)/silicon aluminum molecular sieve catalyst has mesoporous structure,pore size distribution of 4~5 nm and high specific surface area up to 1665.0 m2/g.In addition,WO_(3)and MnO_(2)are evenly distributed on the surface and internal structure of the catalyst.Owing to the unique mesoporous structure,high specific surface area and even distribution of tungsten oxide and manganese oxide,under the combined action of adsorption and chemical catalysis,WO_(3)/MnO_(2)/silicon aluminum molecular sieve exhibits an excellent degradation performance for formaldehyde under room temperature,which achieves highly efficient conversion of formaldehyde with removal rate of 92.0%.
作者
王今华
张茂亮
李建伟
殷会玲
白坡
万欣娣
WANG Jinhua;ZHANG Maoliang;LI Jianwei;YIN Huiling;BAI Po;WAN Xindi(Henan Building Materials Research and Design Institute Co.Ltd.,Zhengzhou 450052,China;Henan Xiangsheng Construction Engineering Testing and Research Institute Co.Ltd.,Zhengzhou 450052,China)
出处
《新型建筑材料》
2023年第7期94-98,共5页
New Building Materials
基金
河南省科学院科研开发专项(220609091,220609108)
河南省建设科技计划项目(HNJS-2022-K22,HNJS-2022-K27)。
关键词
膨润土
介孔材料
甲醛
催化氧化
室内污染物
bentonite
mesoporous structure
formaldehyde
catalytic oxidation
indoor pollutants
