水热处理增强磷酸钴催化臭氧分解性能的研究  

Improved Catalytic Ozone Degradation over Hydrothermal⁃treated Cobalt Phosphate

作　　者：杜广智 张骞[1] 廖继飞 林玉 伍凡 向将来 王晓如 张瑞阳[1] DU Guangzhi;ZHANG Qian;LIAO Jifei;LIN Yu;WU Fan;XIANG Jianglai;WANG Xiaoru;ZHANG Ruiyang(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;The Center of New Energy Materials and Technology,School of New Energy and Materials,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》2021年第S02期81-85,共5页Materials Reports

摘　　要：臭氧污染逐渐取代PM 2.5成为大气首要污染物,因此臭氧污染是亟待解决的环境问题。在众多臭氧治理方法中,催化分解臭氧是较为环保、低能耗和低二次污染的臭氧治理方法。钴基无机酸盐由于丰富的表面氧和良好的电子传递能力,在臭氧催化分解方面具有很大的潜力。本文首先通过简单的共沉淀法制备了不同的钴基无机酸盐,并用于催化臭氧分解的研究,结果表明Co_(3)(PO_(4))_(2)(G-CP)具有相对优异的催化臭氧分解性能。随后,对G-CP样品进一步水热处理,得到改性的G-CP(Hy-CP),实现了催化臭氧分解的活性和稳定性的有效提升。水热处理12 h的Hy-CP(Hy-CP-12)在与臭氧反应6 h后仍保持76%的分解效率,相较于G-CP活性提升了2.1倍。利用XRD、SEM、BET和XPS等测试手段,证明水热处理会使G-CP的晶体结构和形貌发生变化,并且增加了G-CP的比表面积。此外,水热处理会明显增加G-CP的表面氧含量,这对臭氧分解具有重要作用,因而可以有效改善G-CP的臭氧催化分解活性。Ozone pollution has gradually replaced PM 2.5 as the primary air pollutant,posing serious threaten to human health.Various approaches have thus been developed to resolve this problem.Among them,the catalytic decomposition technique has been extensively studied because of its environmentally friendliness,low energy consumption and low secondary pollution.Cobalt⁃based inorganic acid salts possessed abundant surface oxygen and exhibited excellent electron transport capabilities,possessing great potential in the ozone decomposition.In this study,different cobalt⁃based inorganic acid salts were prepared by a simple co⁃precipitation method and used as the catalysts for the ozone decomposition,among which the Co_(3)(PO_(4))_(2)(G⁃CP)sample exhibits the highest performance.Subsequently,the G⁃CP sample was subjected to hydrothermal treatment for several hours for obtaining Hy⁃CP catalyst,and it was found that the activity and stability of ozone removal were significantly improved compared to G⁃CP.It is noting that 76%ozone removal rate can be maintained over Hy⁃CP⁃12 after 6 hours,which is 2.1 times higher than that of G⁃CP.The G⁃CP crystal structure and morphology will change with the hydrothermal process by XRD and SEM.BET XPS.In addition,the hydrothermal process significantly increases the specific surface area and surface oxygen content,which is conducive to the ozone decomposition,thereby improving the decomposition activity of G⁃CP.

关 键 词：磷酸钴 共沉淀 催化分解臭氧 水热法 

分 类 号：TQ4[化学工程]