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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1h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-3 to 50 mg · m-3 within one hour.Moreover,the cyclic experiments indicated negligible deactivation after five cycles,suggesting good stability and reusability in catalytic reactions.