Ag_(2)S/rGO纳米复合材料的细菌还原制备及光电性能研究

Study on bacterial reduction preparation and photoelectric properties of Ag_(2)S/rGO nanocomposites

以一种革兰氏阴性菌(S.oneidensis MR-1)为生物还原剂,Na_(2)S_(2)O_(3)为电子受体,在氧化石墨烯(GO)表面原位合成了Ag_(2)S/rGO纳米复合材料,对其进行了表征和光电性能测试。结果表明,细菌还原得到粒径约10 nm的Ag_(2)S纳米粒子,均匀分布在还原氧化石墨烯(rGO)上;光电性能测试表明,与纯Ag_(2)S相比,Ag_(2)S/rGO纳米复合材料电极的光电流密度约提高了3倍,光生电子-空穴对的分离效率更高,表现出更加优异的光电化学性能。

Ag_(2)S/rGO nanocomposites were synthesized in situ on the surface of GO using a gram-negative bacterium(S.oneidensis MR-1)as a biological reducing agent and Na_(2)S_(2)O_(3) as an electron acceptor.The results showed that Ag_(2)S nanoparticles with a particle size of about 10 nm were uniformly distributed on reduced graphene oxide(rGO)surface.The photoelectric performance test showed that the photoelectric current density of the Ag_(2)S/rGO nanocomposites was about 3 times higher than that of the pure Ag_(2)S.The separation efficiency of the photoelectron-hole pair was higher than that of Ag_(2)S,and its photoelectric chemical performance was more excellent.