新型N、S共掺杂微孔碳材料的制备及性能研究

Preparation and Properties of Novel N,S-Codoped Microporous Carbon

以三聚氯氰和噻吩为反应单体,通过简单的傅克烷基化反应制备含N、S多孔有机聚合物(PCT),进而以PCT为碳前驱体,采用氢氧化钾活化法在不同温度下碳化得到N、S共掺杂微孔碳材料(CPCT-X),研究碳化温度对材料比表面积和孔径的影响规律,并考察具有不同孔结构和杂原子含量微孔碳材料的CO2捕集性能和电化学性能。结果表明:CPCT-X具有较大的比表面积(1629 m^2·g^-1)和高微孔孔隙率(96.7%),碳化温度为600℃时,具有最好的CO2捕集性能(5.5 mmol/g,273 K,0.1 MPa);同时,CPCT-X具有很好的超电性能,当碳化温度为700℃时,比电容可达210 F/g(电流密度为0.5 A/g)。

N,S-Co doped microporous carbons(CPCT-X)were prepared by potassium hydroxide activation method at different carbonization temperatures using porous organic polymer(PCT)synthesized by a simple Friedel-Crafts alkylation reaction between melamine and thiophene as carbon precursors.The effect of carbonization temperature on the BET and pore sizes was investigated,and the CO2 capture and electrochemistry properties of CPCT-X with different pore structures and N,S contents were also conducted.The results suggested that CPCT-X had a large specific surface area(1629 m^2·g^-1)and high micropore porosity(96.7%),and showed a good CO2 capture performance at the carbonization temperature of 600℃(5.5 mmol/g,273 K,0.1 MPa).Meanwhile,the specific capacity could reach 210 F/g at a current density of 0.5 A/g when the carbonization temperature was 700℃.