热处理温度对Pt/TiO_(2)纳米带复合物催化HCHO氧化性能的影响  

Effect of thermal treatment temperature on catalytic performance of Pt/TiO_(2) nanobelt composite for HCHO oxidation

作　　者：崔维怡[1,2] 王希越[2] 谭乃迪[2] CUI Wei-yi;WANG Xi-yue;TAN Nai-di(The Key Laboratory of Chemical Cleaner Production Technology of Jilin Province,Jilin Institute of Chemical Technology,Jilin 132022,China;College of Chemical and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]吉林化工学院化工清洁生产技术吉林省高校重点实验室,吉林吉林132022 [2]吉林化工学院化学与制药工程学院,吉林吉林132022

出　　处：《燃料化学学报》2021年第11期1701-1708,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51805207);吉林省教育厅2021科学技术研究规划项目(JJKH20210235KJ)资助。

摘　　要：采用水热合成法并结合酸处理制备出TiO_(2)纳米带,进行不同温度热处理,在TiO_(2)纳米带上沉积Pt纳米颗粒(NPs),制备出一系列Pt/TiO_(2)纳米带复合物,用于甲醛室温催化氧化。通过各种技术对催化剂进行表征,结果表明,热处理温度对TiO_(2)纳米带的相组成和表面结构,以及表面的氧空位和羟基的数量有较大的影响。在室温下,600℃热处理的TiO_(2)纳米带负载Pt催化剂具有更为丰富的氧空位,有利于吸附氧的活化,并形成较多的Ti-(OH)_(x)-Pt物种,表现出较高的催化活性,在25℃,相对湿度为55%时,甲醛的转化率为91.6%。TiO_(2) nanobelts were prepared by hydrothermal synthesis and acid treatment,then calcination at different temperatures.And subsequently Pt nanoparticles were deposited on the TiO_(2) nanobelts.Pt/TiO_(2) catalytic properties were investigated in the oxidation of formaldehyde.These catalysts were characterized by various techniques and the characterization results showed that the applied thermal treatment temperature greatly influenced the phase composition and surface structure of TiO_(2) nanobelts,as well as the number of oxygen vacancies and hydroxyl groups on the surface.The Pt/TiO_(2) nanobelts thermally treated at 600℃ had more oxygen vacancies,which were conducive to the activation of adsorbed oxygen,formed more Ti-(OH)_(x)-Pt species,and showed higher catalytic activity.At 25℃ and relative humidity of 55%,the conversion of formaldehyde reached 91.6%.

关 键 词：甲醛 相结构 热处理温度 氧空位 催化氧化 

分 类 号：TQ426[化学工程]