负载铂的酸活化高岭土室温甲醛氧化性能

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。

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

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.