水滑石基臭氧分解催化剂性能研究  

Study on the performance of hydrotalcite-based ozone decomposition catalyst

作　　者：马嘉川 郭明星[1] 王胜[2] 王树东[2] MA Jia-chuan;GUO Ming-xing;WANG Sheng;WANG Shu-dong(College of Environmental Science and Engineering,Dalian Maritime University,Dalian 116026,China;Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China)

机构地区：[1]大连海事大学环境科学与工程学院,辽宁大连116026 [2]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023

出　　处：《燃料化学学报（中英文）》2023年第7期1026-1034,共9页Journal of Fuel Chemistry and Technology

基　　金：中国科学院大连化学物理研究所创新基金(I202146);航空工业项目(62502500802);辽宁省自然科学基金(20170540086)资助。

摘　　要：居室环境内臭氧严重危害人体健康,催化分解法是最有效的臭氧净化技术之一。高活性和稳定性臭氧分解催化剂的开发是关键,特别是在高湿度大空速下,臭氧的低温催化分解具有较高的技术壁垒。层状双金属氢氧化物(LDH)具有独特的二维层状结构,具有灵活的结构可调控性。本实验通过共沉淀法用过渡金属制得Ni_(3)Fe、Ni_(3)Co、Ni_(3)Mn与Co_(3)Fe水滑石结构催化剂,在30℃、600000 mL/(g·h)、低湿度RH<5%和高湿度RH>90%条件下,测试了其臭氧催化分解性能。结果表明,Ni_(3)Co-LDH在低湿度和高湿度下,都表现出优良的臭氧分解性能,臭氧转化率分别为88%和77%。结合XRD、BET、SEM、XPS、Raman、FT-IR、TG等表征手段,揭示了LDH催化剂优良臭氧分解性能的内在原因机理。本实验的研究为过渡金属臭氧分解催化剂开发提供了新的思路。Ozone in the indoor environment is seriously harmful to human health,and the catalytic decomposition method is one of the most effective ozone purification technologies.The development of ozone decomposition catalyst with superior activity and stability is the bottleneck,especially under high humidity,high space velocity,and ambient temperature.Layered double hydroxide(LDH)has a unique two-dimensional layered structure and excellent water resistance.In the paper,Ni_(3)Fe,Ni_(3)Co,Ni_(3)Mn,and Co_(3)Fe hydrotalcite-structured catalysts were prepared by the coprecipitation method.And their ozone catalytic decomposition performance was tested under 30℃,600000 mL/(g·h),low humidity(RH<5%),and high humidity(RH>90%).The results showed that Ni_(3)Co-LDH exhibited excellent ozone decomposition performance,and the ozone conversion was 88%and 77%under low humidity and high humidity,respectively.Combined with XRD,BET,SEM,XPS,Raman,FT-IR,TG and other characterizations,the intrinsic mechanism of the excellent ozone decomposition performance of LDH catalysts was revealed.The paper provided new ideas for developing transition metal ozone decomposition catalysts.

关 键 词：臭氧分解 层状双氢氧化物 二维层状结构 催化剂 抗水性 

分 类 号：X511[环境科学与工程—环境工程]