负载铂的酸活化高岭土室温甲醛氧化性能  

Acid activation of Pt/kaoline composite catalyst preparation and room-temperature formaldehyde oxidation

作　　者：雷春生[1] 朱晓峰[1] 

机构地区：[1]常州大学环境与安全工程学院,常州213164

出　　处：《环境工程学报》2016年第10期5743-5748,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51208068)

摘　　要：通过盐酸活化高岭土,再利用浸泡-还原法在其表面负载金属Pt颗粒,制备出甲醛氧化催化剂。通过X射线衍射(XRD)、场发射扫面电镜(FE-SEM)、透射显微镜(TEM)、氮气吸附-脱附等温线和傅里叶红外光谱(FTIR)等对催化剂进行表征测试。结果表明:酸化处理后的高岭土的比表面积增大近1倍,负载金属Pt颗粒后作为催化剂,室温氧化甲醛具有较高的催化氧化性能,甲醛初始浓度为200 mg·m^(-3)左右,催化氧化1 h后,甲醛剩余浓度仅为50 mg·m^(-3)。连续循环5次,催化氧化性能变化不明显,具有稳定的催化氧化活性。Pt nanoparticles were loaded onto the surface of HCl-activated kaoline using a soak-reduction method. The prepared samples were characterized by X-ray diffraction（ XRD）,field-emission scanning electron microscopy（ FE-SEM）,transmission electron microscopy（ TEM）,nitrogen adsorption-desorption isotherms,and Fourier transform infrared spectroscopy（ FTIR）. The results showed that the surface area of kaoline was almost doubled after acid treatment. The Pt-loaded kaoline exhibited significantly enhanced catalytic activity for formaldehyde oxidation at room temperature. The concentration of formaldehyde decreased from 200 mg·m-3to50 mg·m-3within one hour. Moreover,the cyclic experiments indicated negligible deactivation after five cycles,suggesting good stability and reusability in catalytic reactions.

关 键 词：酸活化 高岭土 铂 甲醛 室温氧化 

分 类 号：TQ342.86[化学工程—化纤工业]