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以复合表面活性剂为模板,采用微波辐射、二甲苯萃取脱除模板剂法制备了介孔材料WO3.0.33H2O、WO3.NiO.0.33H2O,利用XRD、TGA、TEM、BET等手段表征了材料的结构、形貌、比表面积、孔径分布。结果表明,微波辐射比传统加热法制备的材料晶粒小,结晶度高,孔径分布更均匀,比表面积更大;制备的材料WO3.NiO.0.33H2O介孔呈现蠕虫状,掺杂Ni2+能稳定介孔结构,抑制晶粒长大,其比表面积达66.37m2.g-1。分别以WO3.NiO.0.33H2O催化剂考察在紫外光(UV)、黑光灯、可见光3种光源下对气相甲醛光催化降解反应动力学规律及紫外光下的催化稳定性,其光催化降解气相甲醛降解率为传统加热法样品的3倍,在可见光下达76.8%。
The mesoporous materials WO3.0.33H2O and WO3.NiO.0.33H2O were prepared by microwave radiation and xylene extraction and removal of template using the complex surfactant as template. The materials were characterized by XRD, TGA, TEM and BET. The structure, morphology, specific surface area, pore size distribution. The results show that microwave irradiation has smaller grain size, higher crystallinity, more uniform pore size distribution and larger specific surface area than the traditional heating method. The prepared mesoporous WO3.NiO.0.33H2O is worm-like and the doped Ni2 + is stable Mesoporous structure, inhibit grain growth, the specific surface area of 66.37m2.g-1. The kinetics of photocatalytic degradation of gaseous formaldehyde under UV light, black light and visible light were investigated with WO3.NiO.0.33H2O catalyst and the catalytic stability under ultraviolet light respectively. The photocatalytic degradation of gaseous formaldehyde The degradation rate was 3 times that of the traditional heating method and 76.8% under the visible light.