Development of Highly Uni-porous Activated Carbon Fiber

以含乙酰丙酮钇（Y(acac) _3）沥青为原料，采用蒸汽活化法制备的活性炭纤维具有介孔（孔径2 ~ 50nm）、高比表面积的特点。此外，还以乙酰丙酮铝（Al(acac) _3）和氧乙酰丙酮钛（TiO(acac) _2）为原料制备了活性炭纤维。含Al (acac) _3沥青制备的活性炭纤维为微孔纤维，孔径为-2 nm。研究了活性炭纤维对大分子染料（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）的吸附性能。用含Y(acac) _3沥青制备的介孔活性炭纤维对大尺寸染料进行了高吸附。Y203是由Y(acac) _3活化得到的，存在于活性炭纤维中，经硝酸处理后完全脱除。但处理后的活性炭纤维对大分子染料（酸性蓝90、直接黄11）的吸附量有所减少。研究发现，活性炭纤维的孔隙大小和金属氧化物颗粒对活性炭纤维对染料的吸附有影响。

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.