Formaldehyde oxidation at room temperature over layered MnO2
Qiuping QiWenrui ZhangYanshi ZhangGuangming BaiShiwei WangPeng Liang
Abstract
In this study, the catalytic oxidation of formaldehyde present in ambient air at room temperature over MnO2 solids prepared by a simple redox reaction was investigated. For HCHO initial concentrations in the 0.49–4.02 mg/m3 range, the obtained MnO2-MS catalyst provided 100% conversion of HCHO at 25 °C in ~1 h which was kept constant for additional 10 h time-on-stream. The characterization of MnO2-MS showed that the large concentration of manganese vacancies (defect sites) and active oxygen species on the surface of the layered MnO2 play a key role for the oxidation of HCHO performance of the catalyst.
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