以氰胺为原料,通过硬模板法制备了介孔石墨相C3 N4 (mg-C3 N4).用mg-C3 N4代替Pt制备染料敏化太阳能电池对电极,并对其电催化性能进行了研究.N2吸附数据表明所制备的mg-C3 N4具有较高的比表面积(87.4m2/g)和较大孔体积(0.45 cm3/g).电化学阻抗谱分析表明所制备的mg-G N4电极的电荷跃迁电阻为42.5Ω·cm2,证明mg-GN4电极对I3-还原反应具有较高的电催化活性.以mg-C3 N4电极作为对电极组装染料敏化太阳能电池,在100 mW/cm2光照下(AM 1.5),电池的光电转换效率达到3.72％,比无孔石墨相C3N4对电极所组装染料敏化太阳能电池的光电转换效率提高了103％.
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