摘要
以高温煤焦油沥青为炭源 ,经浓硝酸和浓硫酸混合物在 30℃氧化制备出较高收率的水性中间相沥青。将水性中间相沥青溶于氨水溶液得到水相炭基凝胶 ,经过乙醇与水直接交换后超临界干燥和热处理制备出颗粒分布均匀、平均尺寸在 10nm左右的无定型碳纳米粉。并采用透射电子显微镜、傅立叶红外光谱、热重、物理吸附、X
Coal tar pitch was oxidized with a mixture of concentrated sulfuric acid and nitric acid at 30?℃ and converted into aqua mesophase pitch in a high yield, which was dissolved in aqueous solution of ammonia hydroxide and carbonaceous hydrogel was formed. The carbonaceous hydrogel was directly exchanged with ethanol to remove water, dried supercritically, thermally treated, and thus resulted in carbonaceous nano powder, which consisted of amorphous carbon nanoparticles and well distributed with an average size of about 10?nm. The characteristics and the formation process were also analyzed by TEM, FT IR, TG, XRD and physical adsorption techniques.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
2001年第3期12-16,23,共6页
New Carbon Materials
基金
国家自然科学基金 ( 5 9872 0 47)~~
