活性炭改性研究进展

Advance of research on modified activated carbon

本文从表面结构特性、表面化学性质和电化学性质 3个方面叙述了国内外在活性炭改性方面的研究进展。表面结构特性改性主要是从增大比表面积和控制孔径分布两方面展开 ,从而增大吸附量 ;表面化学性质改性主要是通过氧化还原改变表面含氧酸性、碱性基团的相对含量以及负载金属改性 ,从而改变对极性、极性较弱或非极性物质的吸附能力 ;电化学性质改性主要是通过加微电场改变活性炭表面的带电性和由此而产生的化学性质的变化 ,从而改变吸附性能。最后 ,本文还从活性炭的吸附性质方面 。

The paper depicts the advance of research on modified active carbon at home and abroad from surface structure properties, chemical characterization and electrochemical characterization. The modification of surface structure properties is mainly done by enlarging specific surface area and control porosity, accordingly enlarging adsorption capacity. The modification of surface chemical characterization is done by redox to modify relative content of oxygen containing acid group and base group and loading of metal compound, accordingly modify the adsorption capacity of dipoles,weak dipoles and non-dipoles molecules. The modification of electrochemical characterization is mainly done by exposing activated carbon under weak electric field to modify the charge of the surface and chemical character change, accordingly modify the adsorption capacity. In the end, advance of research is proposed in the future from adsorption capacity of activated carbon.