教师科研快讯

杨鹏老师在《Applied Catalysis B: Environmental》杂志发表学术成果

日期： 2018-12-30     供稿：材料化学与工程系

2018年12月30日，我院教师杨鹏博士在化学工程、环境科学相关领域重要期刊《Applied Catalysis B: Environmental》（2018年影响因子IF为14.229）在线发表题为“Synthesis of Nb₂O₅ based solid superacid materials for catalytic combustion of chlorinated VOCs”的学术成果（文章链接https://doi.org/10.1016/j.apcatb.2018.07.061）。

Catalytic combustion of DCE onNb₂O₅based catalysts.

该论文的第一作者为杨鹏博士，我校为第一完成单位和通讯单位。本研究工作发现的Nb₂O₅基复合氧化物材料，可分别具有不同的酸碱性质。研究结果表明，催化材料的表面酸性有助于含氯有机物的催化降解，而碱性中心的引入则会降低其催化性能。优化后的催化剂，具有较好的催化燃烧性能，可在较低反应温度实现对几种典型挥发性有机物的深度氧化，对VOCs的综合治理具有较好的工业应用前景。英文摘要如下：

Abstract

Nb₂O₅ based solid superacids (Nb₂O₅-MO_x, M = Ti, W, Zr, Si, Al and Ca, respectively) were synthesized by sol-gel method using citric acid as the cross-linking agent, and then were investigated for catalytic combustion of 1,2-dichloroethane (abbreviation: DCE), one of the typical examples for chlorinated VOCs pollutants. The research results of the structure-performance relationship show that mesopore and amorphous state structure are formed for Nb₂O₅-MO_x, and the metal elements are highly dispersed, which contribute to enhancing the metal-metal interaction and modifying the physicochemical properties of the catalysts. The order for the inherent catalytic activity is: Nb₂O₅-WO₃＞Nb₂O₅-ZrO₂＞Nb₂O₅-TiO₂＞＞Nb₂O₅-Al₂O₃＞Nb₂O₅＞Nb₂O₅-CaO. There exists synergistic catalytic effect: the mesopore and surface acidity facilitate the adsorption, activation and destruction of the C-Cl bond in the reactants to form HCl and byproduct C₂H₃Cl (or carbocation intermediate), and then the redox sites promote deep oxidation of the byproduct/intermediate to convert to CO₂ and H₂O. Especially, the Nb₂O₅-TiO₂ catalyst represents the highest apparent catalytic degradation activity. It also represents good thermal stability and durability for DCE destruction as well as good resistance to water vapor.

该工作得到国家自然科学基金、绍兴文理学院等经费资助。自2016年参加工作以来，杨鹏老师利用环境催化学科的最新研究方法，发展了系列固体酸材料应用在VOCs（尤其是含氯挥发性有机污染物）治理领域，在研究我国铌矿、稀土元素复合材料的深层次加工和工业应用方面已经取得了一系列成果，发表SCI论文二十余篇。