title: Graphene oxide as the passivation layer for Cu(x)O photocatalyst on a plasmonic Au film and the corresponding photoluminescence study.
abstract: The contribution of graphene oxide (GO) on photocatalytic effects of Cu(x)O on plasmonic Au is investigated. It is found that the H(2) evolution rate from pure water is enhanced 1.4 fold using the visible-active Cu(x)O/GO photocatalyst, as compared with Cu(x)O without GO. In addition, the intensity of photoluminescence of Cu(x)O/GO can be enhanced as much as 2.85 fold as compared with Cu(x)O without GO. The enhancement is due to the negative fixed charge in GO, which can passivate the surface of Cu(x)O and suppress recombination of minority electrons at the surface. The results from optical characterization in this study can help to prove the proposed mechanism of passivation.
authors.forename: Yun-Hsuan
authors.initials: YH
authors.lastname: Chang
authors.forename: Chih-Ming
authors.initials: CM
authors.lastname: Wang
authors.forename: Yu-Kuei
authors.initials: YK
authors.lastname: Hsu
authors.forename: Yi-Hao
authors.initials: YH
authors.lastname: Pai
authors.forename: Jia-Yu
authors.initials: JY
authors.lastname: Lin
authors.forename: Chu-Hsuan
authors.initials: CH
authors.lastname: Lin