为了在低温下高效、稳定地降解挥发性氯代有机污染物(CVOCs),以偏钒酸铵为VO_x前驱体制备2D纳米片与3D纳米结构的互穿多孔网络结构的L-V₂O₅催化剂,并通过氢化技术对催化剂中部分V⁵⁺进行还原(H-V₂O₅)。结果表明,该氢化技术降低了催化剂中部分V⁵⁺的化学价态,增加了V—O(Ⅱ)和V—O(Ⅳ)上的氧空位数量和催化剂表面活性氧数量。在275℃时,相较于L-V₂O₅,H-V₂O₅对氯苯催化降解的效率提高了约40%。

To efficiently and stably degrade chlorine-containing volatile organic compounds (CVOCs) at low temperature,L-V₂O₅ catalysts with interpenetrating porous network structures of 2D nanosheets and 3D nanostructures are prepared by using ammonium metavanadate as a VOx precursor.Furthermore,part of V⁵⁺ in the catalysts is reduced through hydrogenation to form H-V₂O₅.Results show that this hydrogenation technique decreases the chemical valence of some V⁵⁺ in the catalyst,increases the number of oxygen vacancies on V-O(Ⅱ) and V-O(Ⅳ),and increases the amount of active oxygen on the catalyst surface.The catalytic degradation efficiency of chlorobenzene by H-V₂O₅ at 275℃is around 40% higher than that by L-V₂O₅.

陈士杰(1982-),男,硕士,副教授,主要研究方向为化学合成及虚拟仿真实验的教学,shijiechen8888@163.com;秦恒飞(1984-),男,博士,教授,主要研究方向为化学催化剂的合成,通讯联系人,jlgqinhf@jsut.edu.cn。