铁锰基双金属复合材料构建及其污染物的降解能力研究  

Construction and catalytic degradation capability of Fe/Mn-based bimetallic hybrids

作　　者：朱建华[1,2] 李梦迪 杨鑫 茹林杰 王晨 ZHU Jianhua;LI Mengdi;YANG Xin;RU Linjie;WANG Chen(Key Laboratory of Metallurgical Emission Reduction&Resources Recycling(Anhui University of Technology),Ministry of Education,Ma’anshan 243002;Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling,Anhui University of Technology,Ma’anshan 243002)

机构地区：[1]安徽工业大学冶金减排与资源综合利用教育部重点实验室,马鞍山243002 [2]安徽工业大学冶金工程与资源综合利用安徽省重点实验室,马鞍山243002

出　　处：《环境科学学报》2024年第3期38-50,共13页Acta Scientiae Circumstantiae

基　　金：安徽省自然科学基金(No.2308085MB66)。

摘　　要：采用水热法制备出纳米薄片状Mn-Fe-HMT前驱体,并在不同的热解温度下制备出双金属复合材料.结果发现,该衍生物保留了前驱体的片状结构,以及较多的金属活性位点,可以在40 min内降解98.8%的橙黄Ⅱ.催化剂受大多数无机离子、水体干扰较小,可以在pH=3~9范围内有效使用.机理研究表明,氧空位促进了单线态氧(1O_(2))的形成,可显著提高其催化效率.该合成方法提供了一种新的双金属化合物合成思路,为非自由基途径降解有机污染物提供了范例.Mn-Fe-HMT nanosheets have been prepared as the precursor by hydrothermal reaction.And the bimetallic composites were produced through the pyrolysis reaction in different temperatures.The derivatives maintained the lamellar structure of the precursor with abundant active sites,and could degrade 98.8%OrangeⅡwithin 40 min.The catalyst had less interference from inorganic ions and water bodies,which could be effectively applied over the 3~9 pH range.The mechanism study revealed that the oxygen vacancy promoted the formation of singlet oxygen(1O_(2)),which significantly improved the catalytic efficiency.This synthesis approach provides a new method for the synthesis of bimetallic compounds,and give an example for the nonradical degradation of organic pollutants.

关 键 词：双金属复合材料 MOFs衍生物 有机物降解 氧空位(OV) 

分 类 号：X703[环境科学与工程—环境工程]