室温下活性炭载纳米铂催化剂对空气中甲醛的去除效果

Catalytic oxidation of formaldehyde over activated carbon-supported platinum catalysts at room temperature

目的探讨活性炭载纳米铂催化剂对空气中甲醛的去除效果。方法采用硼氢化钠液相还原法制备活性炭载纳米铂催化剂,观察不同载铂量(0.1%,0.5%和1%)对甲醛去除率的影响。结果透射电镜观察显示,活性炭载铂为还原态纳米粒子(d≈18 nm),铂负载量为0.5%时,反应5 h甲醛去除率为98.2%。结论本研究制备的活性炭载纳米铂催化剂可有效去除空气中甲醛。

Objective To explore catalytic oxidation of gaseous formaldehyde over activated carbon- supported platinum catalysts （Pt/AC） at room temperature. Methods Pt/AC catalysts were prepared by liquid reduction method using NaBH4 as the reducing agent. The effect of Pt loading （0.1% ,0.5% and 1% ） on formaldehyde removal was investigated. Results Reduc, ed Pt nanoparticles of 18 nm diameter could be observed by transmission electron microscope, Formaldehyde removal efficiency was 98.2% in case of 0.5% Pt loading after reaction for 5 h. Conclusion The prepared Pt/AC catalysts in this study can be used for the efficient removal of formaldehyde in air,