基于MOFs的ZnO/Fe_3O_4@C活化PS降解酸性橙7的研究
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摘要
采用溶剂热法制备了锌铁金属有机骨架材料(Zn/Fe-MOFs),碳化得到ZnO/Fe_3O_4@C双金属催化剂。研究了ZnO/Fe_3O_4@C催化过二硫酸盐(PS)降解酸性橙7(AO7)的效能,结果表明,ZnO/Fe_3O_4@C可有效催化PS降解AO7。当ZnO/Fe_3O_4@C投量、PS投量、AO7浓度分别为0.150 g/L、1.25 mmol/L、20μmol/L时,AO7去除率可达98.09%。酸性环境更有利于PS+ZnO/Fe_3O_4@C体系的反应。AO7的降解主要是SO_4~(·-)和·OH共同作用的结果。
Zn/Fe metal organic framework material(Zn/Fe-MOFs) has been prepared by solvent-thermal method,and bimetal catalyst ZnO/Fe_3O_4@C obtained by further carbonization. The efficiency of ZnO/Fe_3O_4@C catalyzed persulfate(PS) for the degradation of acid orange7(AO7) has been investigated. The results show that the ZnO/Fe_3O_4@C can effectively catalyze PS and degrade AO7. When ZnO/Fe_3O_4@C dosage is 0.150 g/L,PS dosage 1.25 mmol/L,and AO7 concentration 20 μmol/L,the removing rate of AO7 can reach 98.09%. Acidic environment is more advantageous to the reaction of PS+ZnO/Fe_3O_4@C system. It is proved that the degradation of AO7 is mainly a result of the combined action of SO_4~(·-) and ·OH.
Zn/Fe metal organic framework material(Zn/Fe-MOFs) has been prepared by solvent-thermal method,and bimetal catalyst ZnO/Fe_3O_4@C obtained by further carbonization. The efficiency of ZnO/Fe_3O_4@C catalyzed persulfate(PS) for the degradation of acid orange7(AO7) has been investigated. The results show that the ZnO/Fe_3O_4@C can effectively catalyze PS and degrade AO7. When ZnO/Fe_3O_4@C dosage is 0.150 g/L,PS dosage 1.25 mmol/L,and AO7 concentration 20 μmol/L,the removing rate of AO7 can reach 98.09%. Acidic environment is more advantageous to the reaction of PS+ZnO/Fe_3O_4@C system. It is proved that the degradation of AO7 is mainly a result of the combined action of SO_4~(·-) and ·OH.
引文
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[2]Oh W,Dong Zhili,Lim T T.Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal:Current development,challenges and prospects[J].Applied Catalysis B:Environmental,2016,194:169-201.
[3]Olmez-Hanci T,Arslan-Alaton I.Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol[J].Chemical Engineering Journal,2013,224(1):10-16.
[4]Lin K A,Hsu F K,Lee W D.Magnetic cobalt-graphene nanocomposite derived from self-assembly of MOFs with graphene oxide as an activator for peroxymonosulfate[J].Journal of Materials Chemistry A,2015,3:9480-9490.
[5]Sarker M,Ahmed I,Jhung S H.Adsorptive removal of herbicides from water over nitrogen-doped carbon obtained from ionic liquid@ZIF-8[J].Chemical Engineering Journal,2017,323:203-211.
[6]汤甲.金属有机骨架材料的催化应用研究[D].北京:北京科技大学,2017.
[7]Wu Weiyi,Huang Zhaohong,Lim T T.Recent development of mixed metal oxide anodes for electrochemical oxidation of organic pollutants in water[J].Applied Catalysis A:General,2014,480:58-78.
[8]Chen Yaqin,Wu Jiafeng,Yang Weisen,et al.Zn/Fe-MOFs-derived hierarchical ball-in-ball ZnO/ZnFe2O4@carbon nanospheres with exceptional lithium storage performance[J].Journal of Alloys and Compounds,2016,688:211-218.
[9]Pan Xiaoxue,Yan Liqing,Qu Ruijuan,et al.Degradation of the UV-filter benzophenone-3 in aqueous solution using persulfate activated by heat,metal ions and light[J].Chemosphere,2018,196:95-104.
[10]Zhou Peng,Zhang Jing,Zhang Yongli,et al.Degradation of 2,4-dichlorophenol by activating persulfate and peroxomonosulfate using micron or nanoscale zero-valent copper[J].Journal of Hazardous Materials,2018,344:1209-1219.
[11]Liu Fuzhen,Yi Pan,Wang Xue,et al.Degradation of acid orange 7by an ultrasound/ZnO-GAC/persulfate process[J].Separation and Purification Technology,2018,194:181-187.
[12]Zhang Tao,Chen Yin,Wang Yuru,et al.Efficient peroxydisulfate activation process not relying on sulfate radical generation for water pollutant degradation[J].Environmental Science&Technology,2014,48(10):5868-5875.