金属-有机骨架(MOFs)作为一种新兴催化材料,拥有丰富的活性位点和可控的结构,广泛应用于高级氧化技术,在有机废水处理方面展现出巨大潜力。MOFs具有极大的比表面积和数量众多的金属活性位点,能够快速活化氧化剂,产生活性氧自由基,有效去除污染物。为了克服MOFs载流子复合较快、电子转移速率较慢等缺点,进一步提高其催化活性、稳定性等性能,近年来对MOFs材料进行了大量改性修饰研究并取得了丰硕的研究成果。综述了MOFs材料主流的改性修饰方法,包括掺杂外来元素、添加官能团、负载或包覆其他组分、作为前躯体衍生为其他材料等,研究了这些方法对MOFs物相结构、表面特征、催化性能和稳定性等的影响,指出了目前改性MOFs材料在废水有机物处理中面临的问题和挑战。
As an emerging catalytic material,metal-organic frameworks (MOFs) have rich active sites and controllable structures.They are widely used in advanced oxidation technologies (AOPs) and show great potential in the field of organic wastewater treatment.MOFs have a very high specific surface area and a large number of metal active sites,which can quickly activate oxidants to produce reactive oxygen radicals to effectively remove pollutants.In order to overcome the shortcomings of fast carrier recombination and slow electron transfer rate,and further improve the catalytic activity,stability and other aspects of performance,a number of studies have been conducted on modifying and enhancing MOFs and fruitful research results have been achieved in recent years.In this paper,several mainstream methods of modifying MOFs were reviewed,including doping foreign elements,adding functional groups,loading or coating other components,and derivatizing them as precursors into other materials.The effects of these methods on the phase structure,surface characteristics,catalytic performance and stability of MOFs were studied.Additionally,the problems and challenges currently faced by modified MOFs materials in wastewater organic matter treatment were identified.
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基金资助
中国电力国际发展有限公司科技项目(ZDHC-JY-20200804);国家自然科学基金(52100120)
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