一步热解法制备葵花秆基磷掺杂多孔炭及其性能研究  

Preparation and Properties of Sunflower Stalk-based Phosphorus Doped Porous Carbon by One-step Pyrolysis Method

作　　者：刘艳艳 张羽涵 王贵龙 夏启华 孙康[3] 林冠烽[1,2] LIU Yanyan;ZHANG Yuhan;WANG Guilong;XIA Qihua;SUN Kang;LIN Guanfeng(School of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Jinshan College,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Institute of Chemical Industry of Forest Products,CAF,Nanjing 210042,China)

机构地区：[1]福建农林大学材料工程学院,福建福州350002 [2]福建农林大学金山学院,福建福州350002 [3]中国林业科学研究院林产化学工业研究所,江苏南京210042

出　　处：《生物质化学工程》2023年第3期56-60,共5页Biomass Chemical Engineering

基　　金：福建省自然科学基金资助项目(2021J01108);福建省大学生创新创业训练计划项目(S202114046012)。

摘　　要：以葵花秆为碳源,植酸为磷掺杂剂和活化剂,采用一步热解法制备磷掺杂多孔炭。讨论浸渍比、活化温度、保温时间对磷掺杂多孔炭得率和碘吸附值的影响,并采用全自动比表面积及孔径分析仪、X射线光电子能谱仪对其孔隙结构、表面化学结构及结合状态进行表征。研究结果表明:随着浸渍比、活化温度、保温时间的增加,葵花秆基磷掺杂多孔炭的碘吸附值呈先增大后减小的趋势;植酸的活化有利于多孔炭比表面积和孔容积的提升;植酸作为磷源,实现了多孔炭的磷掺杂,其磷元素的结合形式为C—PO 3、C—P—O、C 3—PO、C—P O和C—P。较佳工艺条件即浸渍比(质量比)值2,活化温度900℃,保温时间2 h下制备的磷掺杂多孔炭的比表面积为992.7 m^(2)/g,总孔容积为1.33 cm^(3)/g,碘吸附值为1099.8 mg/g。Phosphorus doped porous carbon was prepared by one-step pyrolysis using sunflower straw as carbon source and phytic acid as phosphorus dopant and active agent.The effect of impregnation ratio,activation temperature and holding time on the yield and iodine adsorption value of phosphorus-doped porous carbon was discussed.The pore structure,surface chemical properties and binding state of doped porous carbon were analyzed by automatic specific surface area analyzer and X-ray photoelectron spectroscopy.The results showed that with the increases of impregnation ratio,activation temperature and holding time,the iodine adsorption value of sunflower stalk-based phosphorus doped porous carbon increased first and then decreased.The activation of phytic acid was conducive to the increase of specific surface area and pore volume of porous carbon.Phytic acid was used as a phosphorus source to achieve phosphorus doping of porous carbon,and the binding types of phosphorus were C—PO 3、C—P—O、C 3—PO、C—P O and C—P.Under the optimum conditions,when the impregnation ratio was 2,activation temperature was 900℃and the holding time was 2 h,the specific surface area,total pore volume and iodine adsorption value of phosphorus-doped porous carbon were 992.7 m^(2)/g,1.33 cm^(3)/g and 1099.8 mg/g,respectively.

关 键 词：葵花秆 多孔炭 植酸 磷掺杂 活化 

分 类 号：TQ35[化学工程] TQ424