title: An Inexpensive Co-Intercalated Layered Double Hydroxide Composite with Electron Donor-Acceptor Character for Photoelectrochemical Water Splitting.
abstract: In this paper, the inexpensive 4,4-diaminostilbene-2,2-disulfonate (DAS) and 4,4-dinitro-stilbene-2,2- disulfonate (DNS) anions with arbitrary molar ratios were successfully co-intercalated into Zn2Al-layered double hydroxides (LDHs). The DAS(50%)-DNS/LDHs composite exhibited the broad UV-visible light absorption and fluorescence quenching, which was a direct indication of photo-induced electron transfer (PET) process between the intercalated DAS (donor) and DNS (acceptor) anions. This was confirmed by the matched HOMO/LUMO energy levels alignment of the intercalated DAS and DNS anions, which was also compatible for water splitting. The DAS(50%)-DNS/LDHs composite was fabricated as the photoanode and Pt as the cathode. Under the UV-visible light illumination, the enhanced photo-generated current (4.67 mA/cm(2) at 0.8 V vs. SCE) was generated in the external circuit, and the photoelectrochemical water split was realized. Furthermore, this photoelectrochemical water splitting performance had excellent crystalline, electrochemical and optical stability. Therefore, this novel inorganic/organic hybrid photoanode exhibited potential application prospect in photoelectrochemical water splitting.
authors.affiliation: 1] State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China) [2] Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology,15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: Shufang
authors.initials: S
authors.lastname: Zheng
authors.affiliation: 1] State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China) [2] Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology,15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.affiliation: College of Chemistry, Beijing Normal University, 19 Xinjiekou Outside Street, 100875, Beijing (P. R. China).
authors.forename: Dongpeng
authors.initials: D
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: Yumei
authors.initials: Y
authors.lastname: Qin
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: Hailong
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: David G
authors.initials: DG
authors.lastname: Evans
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, 100029, Beijing (P. R. China).
authors.forename: Xue
authors.initials: X
authors.lastname: Duan