亲水性FePt纳米颗粒协同催化有机污染物的降解  

Preparation of Hydrophilic FePt Nanoparticles and co-Catalyze Degrade Organic Pollutants

作　　者：刘丛远 刘佳 杜佩瑶 张振 卢小泉 LIU Congyuan;LIU Jia;DU Peiyao;ZHANG Zhen;LU Xiaoquan(Tianjin Key Laboratory of Molecular Optoelectronic Science,Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津市分子光电科学重点实验室,天津大学理学院化学系,天津300072

出　　处：《高等学校化学学报》2020年第4期697-705,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21575115,21705117)资助.

摘　　要：以半胱氨酸为配体,采用一锅法简便合成了亲水性的FePt纳米颗粒(NPs).超小的FePt NPs对水中常见有机污染物表现出良好的催化降解性能,以NaBH 4为还原剂时可实现对染料罗丹明B(RhB)和有害物质4-硝基苯酚(4-NP)的有效还原;以H 2O 2为氧化剂时可实现亚甲基蓝(MB)的高效降解.实验结果表明,FePt NPs对3种有机污染物的降解率均高于90%.对FePt原子对之间的协同催化机理进行了探讨,揭示了不同反应体系中微观反应历程和催化机理的区别.磁性测试结果表明,FePt催化剂可以通过外加磁场进行收集并重复利用,解决了催化剂二次污染问题.该研究为设计合成绿色环保催化剂提供了思路.Hydrophilic ultra-small FePt nanoparticles(NPs)stabilized with cysteine were facile synthesized in water phase by one pot method.As-prepared FePt NPs showed good catalytic degradation activity of common organic pollutants in water.NaBH 4 and H 2O 2 were chose as the co-reactant to degrade rhodamine B(RhB),4-nitrophenol(4-NP)and methylene blue(MB),respectively.The results showed that the degradation rates were more than 90%for three organic pollutants by FePt NPs.At the same time,we focus on the discussion of the collaborative catalytic mechanism between FePt atom pairs,and reveal the difference between the microscopic reaction process and catalytic mechanism in different reaction systems.Moreover,magnetic test results show that FePt catalyst can be collected and reused by external magnetic field,which solves the problem of secondary pollution of the catalyst.This study provides an idea for the design of green catalyst.

关 键 词：亲水性FePt NPS 协同催化 有机污染物 降解 可回收 

分 类 号：O614.8[理学—无机化学]