To remove the fluoride in zinc sulfate electrolyte to an appropriate level,mitigate environmental fluoride pollution,and drive the development of the hydrometallurgy industry of zinc,a novel Fe_(3)O_(4)@SiO_(2)@Fe-MIL...To remove the fluoride in zinc sulfate electrolyte to an appropriate level,mitigate environmental fluoride pollution,and drive the development of the hydrometallurgy industry of zinc,a novel Fe_(3)O_(4)@SiO_(2)@Fe-MIL-101 magnetic composite material was successfully synthesized via the one-pot method.Preparation conditions were optimized and structural characterization of this material conducted using FTIR,SEM,EDS,XRD and Hysteresis analysis.The results show that this composite exhibits a more rapid fluoride adsorption dynamics and a higher fluoride adsorption capacity(18.34 mg/g)and its adsorption behavior fitted for the first order dynamic model and the Freundlich isotherm model.The adsorption of fluorine by this composite is mainly physical adsorption according to the mean adsorption energy(1.216 kJ/mol).The interfering ions co-existed in fluoride-containing solutions,like HCO_(3)^(-),NO^(-)and Cl^(-),have a significant effect on fluorine adsorption.This composite has also been proved with magnetism,higher adsorption selectivity and satisfactory reusability.When this composite is employed as an adsorbent for adsorption removing fluoride in zinc sulfate electrolyte,it exhibits higher pH-dependent behavior as well as high fluoride removal efficiency at pH 6.5.展开更多
采用微波辅助合成方法将WO_(3)固载到金属有机骨架MIL-101(Cr)上,借助于沉积沉淀–光还原方法将Ag/AgCl和WO_(3)/MIL-101复合在一起,制备出Ag/AgCl@WO_(3)/MIL-101可见光催化剂。利用FT-IR、XRD、UV-Vis-DRS和XPS测试技术对该催化剂进...采用微波辅助合成方法将WO_(3)固载到金属有机骨架MIL-101(Cr)上,借助于沉积沉淀–光还原方法将Ag/AgCl和WO_(3)/MIL-101复合在一起,制备出Ag/AgCl@WO_(3)/MIL-101可见光催化剂。利用FT-IR、XRD、UV-Vis-DRS和XPS测试技术对该催化剂进行了表征。结果表明,Ag/AgCl和WO_(3)的引入没有改变MIL-101的结构,催化剂在可见光区有强烈的光吸收。当WO_(3)的负载量为0.3(w)%,Ag的负载量为3.4(w)%时,Ag/AgCl@WO_(3)/MIL-101对70 mL 20 mg/L的罗丹明B溶液的降解率达到100%,并且该催化剂具有较好的稳定性。展开更多
基金National Natural Science Foundation of China(21865011)2024 Innovation and Entrepreneurship Project of College Student in Jishou University(JDCX20241122)。
文摘To remove the fluoride in zinc sulfate electrolyte to an appropriate level,mitigate environmental fluoride pollution,and drive the development of the hydrometallurgy industry of zinc,a novel Fe_(3)O_(4)@SiO_(2)@Fe-MIL-101 magnetic composite material was successfully synthesized via the one-pot method.Preparation conditions were optimized and structural characterization of this material conducted using FTIR,SEM,EDS,XRD and Hysteresis analysis.The results show that this composite exhibits a more rapid fluoride adsorption dynamics and a higher fluoride adsorption capacity(18.34 mg/g)and its adsorption behavior fitted for the first order dynamic model and the Freundlich isotherm model.The adsorption of fluorine by this composite is mainly physical adsorption according to the mean adsorption energy(1.216 kJ/mol).The interfering ions co-existed in fluoride-containing solutions,like HCO_(3)^(-),NO^(-)and Cl^(-),have a significant effect on fluorine adsorption.This composite has also been proved with magnetism,higher adsorption selectivity and satisfactory reusability.When this composite is employed as an adsorbent for adsorption removing fluoride in zinc sulfate electrolyte,it exhibits higher pH-dependent behavior as well as high fluoride removal efficiency at pH 6.5.
文摘采用微波辅助合成方法将WO_(3)固载到金属有机骨架MIL-101(Cr)上,借助于沉积沉淀–光还原方法将Ag/AgCl和WO_(3)/MIL-101复合在一起,制备出Ag/AgCl@WO_(3)/MIL-101可见光催化剂。利用FT-IR、XRD、UV-Vis-DRS和XPS测试技术对该催化剂进行了表征。结果表明,Ag/AgCl和WO_(3)的引入没有改变MIL-101的结构,催化剂在可见光区有强烈的光吸收。当WO_(3)的负载量为0.3(w)%,Ag的负载量为3.4(w)%时,Ag/AgCl@WO_(3)/MIL-101对70 mL 20 mg/L的罗丹明B溶液的降解率达到100%,并且该催化剂具有较好的稳定性。
