摘要
对煤质活性炭、椰壳活性炭和沥青基活性炭进行了硝酸氧化处理。通过酸碱滴定、红外光谱、比表面积和孔径分布测定研究了硝酸氧化对3种活性炭的表面官能团、比表面积和孔结构的影响,以及硝酸氧化对活性炭进一步进行乙二胺胺化的影响。结果表明,在所选的3种活性炭中,氧化对于椰壳活性炭的物理结构破坏最严重,比表面积下降了16%,而煤质活性炭与沥青基活性炭均很好地保持了原有的结构性质。硝酸氧化在不同的活性炭表面均引入了一定量的酸性基团,其中沥青基活性炭氧化后表面酸性基团含量最高,达到2.36mmol/g。氧化后的3种活性炭接枝乙二胺后,沥青基活性炭的表面碱性基团含量最高,达到1.39mmol/g。
Three types of activated carbons including coconut shell activated carbon, coal-based activated carbon and pitch-based activated carbon were oxidized by nitric acid. The products were characterized by titration, FTIR, surface area and porosity measure. The results indicated that the structures of coal-based and pitch-based activated carbons were well maintained after oxidation, while the surface area of coconut shell activated carbon was decreased by 16%. Acidic groups of the three types of activated carbons after oxidation were determined by titration and pitchbased activated carbon was found to have the largest content of acidic groups （2.36mmol/g）. The three types of activated carbons after oxidation were grafted by ethylenediamine and pitch-based activated carbon was also found to have the largest content of basic groups （ 1.39mmol/g）.
出处
《化学通报》
CAS
CSCD
北大核心
2010年第3期284-288,共5页
Chemistry
基金
河南省重大公益基金项目(81100912100)资助
关键词
活性炭
硝酸
氧化
Activated carbon, Nitric acid, Oxidation
