摘要
以鱼鳞为原料,通过磷酸活化法制备具有较高比表面积并含大量微孔的活性生物炭。利用傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、X射线光电子能谱(XPS)、Boehm滴定法对制备的鱼鳞活性生物炭的结构特征和表面的组成及性质等进行了表征。结果表明:在85%的磷酸、浸渍比(磷酸与鱼鳞质量比)为2、550℃活化1.0 h条件下制备的鱼鳞活性生物炭的得率为26.74%,亚甲基蓝吸附值为213 mg/g,碘吸附值为936.46 mg/g,比表面积为498.162 cm 2/g,总孔容为0.266 cm^ 3/g,平均孔径为2.138 nm。Boehm滴定法总酸度为1.678 mmol/g,总碱度为0.433 mmol/g,其表面含有两性官能团。其中酸性官能团为羟基、羧酸基、内酯基等多种含氧类官能团和含磷官能团,碱性官能团为酰胺、内酰胺、吡啶型和吡咯型等含氮官能团。
Using fish scales as raw materials,activated carbon with high specific surface area and a large number of micropores was prepared by phosphoric acid activation.Fourier transform infrared spectroscopy(FT-IR),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and Boehm titration were used to characterize the structural characteristics and surface composition of fish scale carbon.The results showed that the yield of activated carbon was 26.74%when 85%phosphoric acid was used and impregnation ratio is 2(phosphoric acid and raw material mass ratio of fish scale)was activated under 550℃for 1.0 h.The adsorption value of methylene blue was 213 mg/g,the adsorption value of iodine was 936.46 mg/g,the specific surface area was 498.162 cm 2/g,the total pore volume was 0.266 cm^ 3/g and the average pore diameter was 2.138 nm.Boehm titration has a total acidity of 1.678 mmol/g and a total alkalinity of 0.433 mmol/g.Its surface contains amphoteric functional groups.Among them,acid functional groups are hydroxyl,carboxylic acid group,lactone group and other oxygen-containing functional groups and phosphorous functional groups,while alkaline functional groups are amide,lactam,pyridine type and pyrrole type nitrogen-containing functional groups.
作者
张净净
李海朝
ZHANG Jingjing;LI Haichao(Key Laboratory of Resource Chemistry and Eco-environment Protection of Qinghai-Tibet Plateau,Qinghai Nationalities University,Xining 810007,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第S01期116-119,共4页
Materials Reports
基金
青海省自然科学基金(2019-ZJ-928)。
关键词
活性炭
鱼鳞
磷酸
含氮官能团
activated carbon
fish scale
phosphoric acid
nitrogen functional groups
作者简介
张净净,青海民族大学硕士研究生;李海朝,青海民族大学教授,硕士生导师。2003年获博士学位,2005年博士后出站。加拿大新布伦瑞克大学访问学者(合作教授为加拿大院士Dr.Y.H.Ni)。青海省化学会委员,青海省级高等学校青年骨干教师,省级自然科学化学工程学科带头人。现任青海民族大学化学化工学院副院长,负责学院科研、学科建设和研究生工作。主持国家自然科学基金,省部级科研项目等科研课题多项。lihaichao@vip.163.com。
