Citation: CHEN Hui-Min, HE Yun-Qiu, LI Yi-Ming, CAI Si-Qi. Preparation and Photoelectric Properties of Reduced Graphite Oxide(rGO)/ZnO Composite Films[J]. Chinese Journal of Inorganic Chemistry, ;2015, (3): 429-438. doi: 10.11862/CJIC.2015.101
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The rGO/ZnO (reduced graphite oxide/ZnO) composite films were synthesized by using different reduction treated graphite oxides (GOs) as precursors, and then their visible-light excitation photoelectric conversion performance was investigated. In this work, we used the two reducing agents, KOH or NaBH4, to reduce graphite oxide, then the reduced graphite oxide was mixed with zinc oxide sol. rGO/ZnO composite films were prepared by spin-coating and heat treatment on FTO(fluorine-doped tin oxide)conductive glass substrates. The as-prepared samples were characterized by XRD, FTIR, FE-SEM, XPS, UV-Vis, etc. Pretreatment process of graphite oxide had a great influence on the structure of composite films, reduction treatment by NaBH4 was more conducive to form a uniform thin film. Photocurrent test results showed that different composite films can produce photocurrent under visible-light irradiation, the principle was photo-excited electron transition from rGO to ZnO to achieve the separation of photo-generated carriers. The GO after NaBH4-reduction with ZnO composite film showed the largest photocurrent density with a value of 6×10-7 A·cm-2.
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