A new nanostructured amino-functionalized magnetic bacterial cellulose/activated carbon（BC/AC）composite bioadsorbent（AMBCAC）was prepared for removal of Pb^2＋ and methyl orange（MO）from aqueous solution.The resul...A new nanostructured amino-functionalized magnetic bacterial cellulose/activated carbon（BC/AC）composite bioadsorbent（AMBCAC）was prepared for removal of Pb^2＋ and methyl orange（MO）from aqueous solution.The results demonstrated that the equilibrium adsorption capacity（qe）for Pb^2＋ obviously increases by 2.14 times after introduction of amino groups,the optimum p H for Pb^2＋and MO adsorption was 5.0 and 3.0,respectively,and the qeof AMBCAC was 161.78 mg g^-1 for Pb^2＋ and 83.26 mg g^-1 for MO under the optimal conditions in this investigation.The kinetics and adsorption isotherm data of the sorption process were well fitted by pseudo-second-order kinetic model and Langmuir isotherm respectively.The thermodynamic results（the Gibbs free energy change G〈0,the enthalpy change H〉0,the entropy change S〉0）implied that the adsorption process of Pb^2＋ and MO was feasible,endothermic and spontaneous in nature.These results support that the AMBCAC composite developed in this work can provide a cheap and efficient way for easy removal of both Pb^2＋ and MO as a promising adsorbent candidate for wastewater treatment.展开更多
The practical application of Li-S batteries is severely restricted by limited cycle life and low sulfur loading.Here,a common industrial paint,methylated amino resin(MAR),was employed as a novel multifunctional binder...The practical application of Li-S batteries is severely restricted by limited cycle life and low sulfur loading.Here,a common industrial paint,methylated amino resin(MAR),was employed as a novel multifunctional binder to address these issues.The S cathodes by using MAR binder(S@MAR) demonstrate an excellent reversible capacity of 480.9 mA·h·g^(-1) after 400 cycles at a rate of 0.5 C,and the sulfur loading in the electrode could achieve as high as 3.0 mg·cm^(-2).These achievements are ascribed to the superior mechanical property for volume expansion,better adsorption ability toward poly sulfides,and more favorable Li+transportation of MAR,compared to the conventional binders of polyvinylidene difluoride and carboxymethylcellulose.This study paves a new way for obtaining high-energy-density Li-S batteries by the simple application of multifunctional binder that are inherently cost-effective.展开更多
以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间...以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间为4 h,多乙烯多胺投加量为1 m L,最佳反应温度为34℃.经红外光谱检测,氨基化菌丝体构建成功,氨基化改造后的菌丝体对甲基橙的最大吸附量为460 mg·g^(-1).展开更多
基金supported financially by the National Natural Science Foundation of China (No.51301039)the Natural Science Foundation of Fujian Province (No.2016J01214)the Public Institutes Special Fund Project of Fujian Province (No.2016R10096)
文摘A new nanostructured amino-functionalized magnetic bacterial cellulose/activated carbon（BC/AC）composite bioadsorbent（AMBCAC）was prepared for removal of Pb^2＋ and methyl orange（MO）from aqueous solution.The results demonstrated that the equilibrium adsorption capacity（qe）for Pb^2＋ obviously increases by 2.14 times after introduction of amino groups,the optimum p H for Pb^2＋and MO adsorption was 5.0 and 3.0,respectively,and the qeof AMBCAC was 161.78 mg g^-1 for Pb^2＋ and 83.26 mg g^-1 for MO under the optimal conditions in this investigation.The kinetics and adsorption isotherm data of the sorption process were well fitted by pseudo-second-order kinetic model and Langmuir isotherm respectively.The thermodynamic results（the Gibbs free energy change G〈0,the enthalpy change H〉0,the entropy change S〉0）implied that the adsorption process of Pb^2＋ and MO was feasible,endothermic and spontaneous in nature.These results support that the AMBCAC composite developed in this work can provide a cheap and efficient way for easy removal of both Pb^2＋ and MO as a promising adsorbent candidate for wastewater treatment.
基金financially supported by the National Natural Science Foundation of China(Nos.51902036 and51865021)the Natural Science Foundation of Chongqing Science&Technology Commission(No.cstc2019jcyj-msxm1407)+4 种基金the Natural Science Foundation of Chongqing Technology and Business University(No.1952009)the Venture&Innovation SupportProgram for Chongqing Overseas Returnees(No.CX2018129)the Science and Technology Research Program of Chongqing Municipal Education Commission(Nos.KJQN201900826 and KJQN201800808)the Innovation Group of New Technologies for Industrial Pollution Control of Chongqing Education Commission(No.CXQT19023)the Open Research Fund of Chongqing Key Laboratory of Catalysis and New Environmental Materials(No.KFJJ2018082)。
文摘The practical application of Li-S batteries is severely restricted by limited cycle life and low sulfur loading.Here,a common industrial paint,methylated amino resin(MAR),was employed as a novel multifunctional binder to address these issues.The S cathodes by using MAR binder(S@MAR) demonstrate an excellent reversible capacity of 480.9 mA·h·g^(-1) after 400 cycles at a rate of 0.5 C,and the sulfur loading in the electrode could achieve as high as 3.0 mg·cm^(-2).These achievements are ascribed to the superior mechanical property for volume expansion,better adsorption ability toward poly sulfides,and more favorable Li+transportation of MAR,compared to the conventional binders of polyvinylidene difluoride and carboxymethylcellulose.This study paves a new way for obtaining high-energy-density Li-S batteries by the simple application of multifunctional binder that are inherently cost-effective.
文摘以环氧氯丙烷为交联剂,将多乙烯多胺嫁接于青霉菌丝体表面,探讨氨基化菌丝体制备过程中的影响因素以及经氨基化改造后的菌丝体对甲基橙的吸附效果.结果表明,环氧氯丙烷的最优反应时间为4 h,环氧氯丙烷投加量为1 m L;多乙烯多胺反应时间为4 h,多乙烯多胺投加量为1 m L,最佳反应温度为34℃.经红外光谱检测,氨基化菌丝体构建成功,氨基化改造后的菌丝体对甲基橙的最大吸附量为460 mg·g^(-1).
