蜂窝状介孔CuSiO_(3)掺杂材料热催化分解NO的性能研究  

Performance of CuSiO_(3)-based Materials with Honeycomb Mesoporous Structure in Thermocatalytic Decomposition of NO

作　　者：黄凌宇 廖继飞 张骞[2] 付艳[1,2] 肖文艳 朱洁 杨书镔 HUANG Lingyu;LIAO Jifei;ZHANG Qian;FU Yan;XIAO Wenyan;ZHU Jie;YANG Shubin(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,University of Southwest Petroleum University,Chengdu 610500,China;The Center of New Energy Materials and Technology,School of New Energy and Materials,University of Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]西南石油大学新能源与材料学院新能源材料及技术研究中心,成都610500

出　　处：《材料导报》2024年第19期10-15,共6页Materials Reports

基　　金：四川省重大科技专项揭榜挂帅项目(20222DZX0042)。

摘　　要：热催化分解NO因具有无污染、经济等优点,已广泛用于汽车尾气、烟炉废气等NO废气处理过程。目前,获得中低温条件下保持高效催化活性的热催化材料成为NO热催化分解研究的关键。本工作以正硅酸乙酯为硅源,通过调控模板剂比例制备出了具有特殊介孔的SiO_(2),并利用水热法合成出了具有蜂窝状介孔的CuSiO_(3)。实验结果表明,当模板剂物质的量比(CTAB/三乙胺)为1∶0.1时,CuSiO_(3)热催化分解NO的活性最好,这归因于特殊的蜂窝状介孔。对活性最好的CuSiO_(3)掺杂Co元素后,其在500℃下热催化分解NO的效率可达90%以上,4 h后仍能维持80%以上的催化分解效率。与未掺杂的CuSiO_(3)相比,Co元素的存在导致掺杂后的催化材料结晶度发生改变,暴露了更多活性位点,还原性明显提升。Thermocatalytic decomposition of NO has the advantages of zero pollution,economic cost-effectiveness and so on.It has become crucial for current research of NO thermocatalytic decomposition to develop catalysts which still maintain high activities within medium-low temperature range.Using tetraethyl orthosilicate as the silicon source,this work prepared SiO_(2)with special mesoporous structure by adjusting the template ratio,and further hydrothermally synthesized CuSiO_(3)with honeycomb mesoporous structure.Experimental results showed that by adjusting the template molar ratio(CTAB/triethylamine)to 1∶0.1,the highest catalytic activity of the produced CuSiO_(3)for NO decomposition could be achieved owing to its special honeycomb mesoporous structure.The dosage of Co into the most active CuSiO_(3)raised its NO thermocatalytic decomposition efficiency at 500℃to over 90%which could maintain above 80%after 4 h usage.Compare to undoped CuSiO_(3),the presence of Co changed the crystallinity of the catalyst,resulting in more exposed active sites and improved reducibility.

关 键 词：NO分解 蜂窝状介孔 热催化 硅酸铜 

分 类 号：X511[环境科学与工程—环境工程]