原位合成Cu-Fe_(3)O_(4)@花生壳炭及其非均相Fenton催化降解罗丹明B的研究  

In-situ synthesis of Cu-Fe_(3)O_(4)@peanut shell-derived carbon and study on its application in heterogeneous Fenton catalytic degradation of rhodamine B

作　　者：张宇 毛磊 张春桃[1,2] 梁文懂 ZHANG Yu;MAO Lei;ZHANG Chun-tao;LIANG Wen-dong(School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学化学与化工学院,湖北武汉430081 [2]武汉科技大学煤转化与新型炭材料湖北省重点实验室,湖北武汉430081

出　　处：《现代化工》2021年第9期86-91,共6页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(51204125)。

摘　　要：以花生壳炭(PAC)为载体,采用溶剂热法原位合成了Cu-Fe_(3)O_(4)@PAC,并用于非均相Fenton催化降解罗丹明B溶液。利用SEM、XRD、氮气吸附-脱附和XPS方法对合成的催化剂进行表征和分析。结果表明,将纳米Cu-Fe_(3)O_(4)负载于花生壳炭后,纳米Cu-Fe_(3)O_(4)的团聚程度减小、分散程度增大、结晶度明显降低,晶相结构为单质铜和Fe_(3)O_(4),Cu-Fe_(3)O_(4)@PAC表面富含Fe(Ⅱ)、Fe(Ⅲ)和Cu(0)位点,有效提高了对罗丹明B的降解性能。在纳米Cu-Fe_(3)O_(4)@PAC质量浓度为0.3 g/L、H_(2)O_(2)浓度为20 mmol/L、溶液pH为4.5、反应温度为35℃、反应时间为2 h的条件下,罗丹明B降解率达91.4%,一级反应速率常数为0.0207 min^(-1),比无花生壳炭载体的纳米Cu-Fe_(3)O_(4)对罗丹明B的降解率增加了26.8%。Taking peanut shell-derived carbon(PAC)as a carrier,Cu-Fe_(3)O_(4)@PAC is synthesized in situ via solvothermal method and is used to catalyze heterogeneous Fenton catalytic degradation of rhodamine B solution.SEM,XRD,nitrogen adsorption-desorption and XPS methods are employed to characterize the synthesized catalyst.The results show that the loading of nano scale Cu-Fe_(3)O_(4)on peanut shell-derived carbon increases the dispersion of nano-Cu-Fe_(3)O_(4)with higher crystallinity.The crystal structure of nano-Cu-Fe_(3)O_(4)@PAC is elemental copper and Fe_(3)O_(4).The surface of CuFe_(3)O_(4)@PAC is rich in Fe(Ⅱ),Fe(Ⅲ)and Cu(0)sites,which contributes to the enhanced degradation of rhodamine B.The degradation rate of rhodamine B reaches 91.4%with a first order reaction rate constant of 0.0207 min^(-1)under the conditions for catalytic degradation reaction as follows:the dosage of Cu-Fe_(3)O_(4)@PAC is 0.3 g·L^(-1),the dosage of H2O2 is 20 mmol·L^(-1),the solution pH is 4.5,the reaction temperature remains at 35℃,and the reaction lasts for 2 hours.The degradation rate of rhodamine B over Cu-Fe_(3)O_(4)@PAC increases 26.8%than that over nano-Cu-Fe_(3)O_(4).

关 键 词：纳米Cu-Fe3O4 花生壳炭 非均相Fenton降解 罗丹明B 原位合成 

分 类 号：X791[环境科学与工程—环境工程]