负载纳米氧化锌多孔碳吸附剂的制备及其结构研究

Preparation and structure of porous carbon supporting zinc oxide nano-particles using microemulsion method

半导体纳米粒子光催化降解VOC是一种有效、经济的有机废气处理方法,本论文研究了纳米氧化锌改性的多孔碳材料的制备、结构及其对挥发性有机物的光催化分解性能。结果表明,可利用微乳液法合成并经高温煅烧得到负载于多孔碳材料上的纳米氧化锌。制备条件如反应物浓度、配比、沉淀剂种类等条件对产品的形貌、氧化锌纳米颗粒大小和负载量有明显的影响。负载纳米氧化锌微粒多孔炭吸附剂既保持了多孔炭材料的多孔性,又具有一定催化分解低浓度挥发性有机污染物的能力。

Photo-catalytic degradation of VOC by semiconductor nanoparticle is a kind of effective and economic treatment method for organic exhaust gas. In this paper, zinc oxide nano-particles supported on porous carbon were prepared using microemulsion method followed by sintered at high temperature. Their morphology and crystalline structure of the resulted porous carbon supporting zinc oxide were characterized. The experiment results show that the reactants concentration and molar ratios, the precipitator used have evident effect on the loading amount, particle size and the distribution of zinc oxide nano-particle on active carbon. The active carbon with zinc oxide still keep the plentiful porous structure, thus keep high adsorption capacity while having photo-catalytic degradation properties for low concentration VOes in the room temperature.