山竹壳制备吸附-光催化碳材料及其性能  

Preparation of adsorption-photocatalytic carbon materials by modified mangosteen shells and their properties

作　　者：陈厶墁 贾赵平 邱梦杰 李玉成 马梦韶 刘静[2] CHEN Siman;JIA Zhaoping;QIU Mengjie;LI Yucheng;MA Mengshao;LIU Jing(Beijing Key Laboratory of Forest Biomass Chemistry,Beijing Forestry University,Beijing 100083,China;Engineering ResearchCenter of Forestry Biomass Materials and Energy of Ministry of Education,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学林木生物质化学北京市重点实验室,北京100083 [2]北京林业大学林业生物质材料与能源教育部工程研究中心,北京100083

出　　处：《林业工程学报》2024年第1期92-100,共9页Journal of Forestry Engineering

基　　金：北京林业大学大学生创新创业训练计划项目(S202110022100)。

摘　　要：以山竹壳为原料,通过磷酸活化处理、焙烧、浸渍乙酸锌、乙酸银溶液的方法制得复合双金属生物质碳材料AgZn/P/BC,并在可见光照射下研究该复合双金属生物质碳材料对2,4-二氯苯酚(2,4-DCP)的吸附-可见光催化协同降解性能。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、紫外-可见漫反射光谱仪(DRS)、比表面积测试仪(BET)和X射线光电子能谱(XPS)对复合材料进行表征分析,采用高效液相色谱法(HPLC)测定反应物浓度,计算脱除率。分别比较不同金属物质的量比(Ag、Zn)和不同金属乙酸盐溶液浸渍浓度的单一反应条件发现,当金属物质的量比n(Ag)∶n(Zn)为1∶1,金属乙酸盐溶液浓度为0.01 mol/L时,复合材料对2,4-DCP的降解效果最好,黑暗环境中吸附30 min脱除率可达62.33%,光照条件下催化120 min脱除率可达93.52%。动力学研究结果表明,金属乙酸盐溶液浓度为0.01 mol/L的复合双金属生物质碳材料AgZn/P/BC,其降解速率相较于金属乙酸盐溶液浓度为0.03 mol/L的AgZn/P/BC提高了近1.76倍,在pH测试和循环实验中复合材料的催化性能均保持良好,表明AgZn/P/BC具有优异的光催化降解2,4-二氯苯酚性能。In this study,bimetallic biomass carbon composite AgZn/P/BC was prepared from mangosteen shells by the phosphoric acid activation,roasting and impregnation of zinc acetate and silver acetate solution.The adsorption and visible light catalytic synergism of 2,4-dichlorophenol(2,4-DCP) of bimetallic biomass carbon composite were investigated under the visible light irradiation.The bimetallic biomass carbon composites were characterized by the scanning electron microscope(SEM),X-ray diffractometer(XRD),UV-visible diffuse reflection spectrometer(DRS),specific surface area tester(BET) and X-ray photoelectron spectroscopy(XPS).The characterization results showed that the bimetallic biomass carbon composite AgZn/P/BC had a large number of microporous structures,large specific surface area and strong light response ability.The concentration of reactants was determined by the high-performance liquid chromatography(HPLC) and the degradation rate was calculated.By comparing the single reaction conditions of different metal molar ratios(Ag/Zn) and different metal acetate solution impregnation concentrations,it was found that when the metal molar ratio of Ag and Zn was 1∶1 and the concentration of metal acetate solution was 0.01 mol/L,the bimetal compo-site material had the best degradation effect on 2,4-dichlorophenol,and the removal rate of 2,4-dichlorophenol could reach 62.33% after 30 min adsorption in the dark environment.The removal rate reached 93.52% in 120 min under light conditions.The kinetic study showed that the degradation rate of composite bimetallic biomass carbon material AgZn/P/BC with the concentration of metal acetate solution at 0.01 mol/L was nearly 1.76 times higher than that of AgZn/P/BC with the concentration of metal acetate solution at 0.03 mol/L.In addition,in pH test,the removal property of the bimetallic biomass carbon composite was almost not affected by the environmental acidity and alkalinity,and had excellent environmental adaptability.In order to test the stability of the bimetallic biomass

关 键 词：山竹壳 2 4-二氯苯酚 生物质碳 乙酸银 乙酸锌 吸附-光催化 

分 类 号：TB3333[一般工业技术—材料科学与工程] O643.36[理学—物理化学]