Development of Highly Uni-porous Activated Carbon Fiber

用水蒸气活化法制备的含Y(Acac)3沥青的活性碳纤维具有介孔结构(孔径2~50 nm)和高比表面积。此外，还以乙酰丙酮铝(Al(Acac)_3)和氧乙酰丙酮钛(TiO(Acac)_2)沥青为原料制备了活性碳纤维。添加Al(Acac)3的沥青制备的活性碳纤维具有微孔结构(孔径为2 nm)。研究了大分子染料(酸性蓝90、直接黄11)和小分子染料(酸性红88、酸性红13、酸性红9)在活性碳纤维上的吸附性能。以Y(Acac)3活化生成的Y(Acac)3为原料制得的介孔活性碳纤维对大尺寸染料有较高的吸附能力，用硝酸处理后的活性碳纤维可完全脱除其中的大尺寸染料。但处理后的活性碳纤维对大分子染料(酸性蓝90、直接黄11)的吸附量有所减少。研究发现，活性碳纤维的孔径和金属氧化物颗粒对活性碳纤维吸附染料有一定的影响。

Activated carbon fibers obtained from pitch containing yttrium acetylacetonate (Y(acac) _3) by steam activation was mesoporous (pore size 2-50 nm) and of high surface area. In addition, activated carbon fibers were prepared from pitch containing aluminum acetylacetonate (Al(acac) _3) and titanium oxyacetylacetonate (TiO(acac) _2). Activated carbon fiber from pitch containing Al (acac) _3 was microporous (pore size -2 nm). The adsorption of dyes of large molecular size (Acid Blue 90, Direct Yellow 11) and small molecular size (Acid Red 88, Acid Red 13, Acid Red 9) on obtained activated carbon fibers was investigated. Large size dyes were highly adsorbed on mesoporous activated carbon fiber obtained from pitch containing Y(acac) _3.Y203, which was derived from Y(acac) _3 by activation and present in the activated carbon fiber, completely removed by the treatment of activated carbon fiber with nitric acid. However, the adsorbed amounts of large molecular size dyes(Acid Blue 90, Direct Yellow 11) on the treated activated carbon fiber was decreased. It was found that pore size and metal oxide particles in the activated carbon fiber influence on the adsorption of dyes on activated carbon fiber.