酸氧化处理对碳球表面基团含量的影响.pdf

第29卷增刊(1) 2(K)9年9月 现代化工 !vlodem Chemical lndustry Sep．2009 ·177· 酸氧化处理对碳球表面基团含量的影响 郭兴梅1，一，刘旭光1．一，窦 涛3 (1．太原理工大学化学化工学院，山西太原030024；2．太原理工大学新材料界面科学与 工程教育部重点实验室，山西太原030024；3．太原理工大学精细化工研究所，山西太原030024) 摘要：采用硝酸为氧化剂对碳球表面进行改性研究，通过红外光谱法和酸碱滴定法分别考察了硝酸浓度和处理时闻对碳球 表面含氧基团的影响。结果表明，硝酸处理可在碳球表面引入羧基、羟基等含氧基团。随硝酸浓度的增加。碳球表面羧基、羰基 以及羟基等含氧基团的量上升；随浓硝酸处理时间的延长，羟基含量上升。羰基含量下降，羧基含量和含氧基团的总量先上升而 后下降。用浓硝酸处理8 h时，羟基含量最高，为2．490 nlnol／g；浓硝酸处理4 h时羧基含量和含氧基团总量最高，分别为1．289 nlnol／g和5．702 nmol／g。 关键词：碳球；氧化处理；表面官能团；含量 中图分类号：1Q050．4 文献标识码：A 文章编号：0253—4320(2009)Sl一0177—03 IllnUellCe of acid oxidation OR functional groups On SUItliCe of carbon spheres G∞X／rig-reell一，删Xu-guan91一，加U Ta03 (1．College of Chemistry and Chemical l|：ngi,leering，Taiyuan University of Technology，Taiyuan 030024，China； 2．Key Laboratory of Interface Science and Engineering in Advanced Naterials of the Ministry of Education，Taiyuan University of Technology，Taiyuan 030024，China；3．Research Ir面tute of speci,a Chemicals， Taiyuan University of Teehnolog)，Taiyuan 030024，‰) Abstract：}玎她is used幽oxidant to 1110d毋the surface of carbon spIIeres．The type and amount of the functional groul∞ introduced Oil the 811trace of the Cltl‰n spheres m quantitively analyzed b FT-IR and acid-base titration．Results show that carboxyl，hydroxyl and carbonyl functional groups are produced 011 the surface of carbon spher嗍by nitric acid trealment．WitII the inere嬲ing of HN03 solution concentration the amount of carboxyl，earbonyl，hyaroxyl and total oxygen-containing functional groul粥(TOFC,s)increase．Along with increasing cEf treatment time，the amount of hyd,Uxyl increases，the ltumount of earbonyl decreases，and the amount of earboxyl increas醑first and then decreases．The treallnent by concentrated nitric arid for 4 hours will introduce 1．289 mmol／g of earboxyl and 5．702 mmol／g ofTOFGs onto the surface ofcarbon spheres，and the trealrnent by concentrated nilric acid for 8 hours will introduce 2．490 rranol／g hyaroxy]．which is the mllxirnuln value． Key words：carbon spheres；oxidation t