Bi2WO6 quantum dots decorated reduced graphene oxide: Improved charge separation and enhanced photoconversion efficiency

Songmei Sun, Wenzhong Wang, Ling Zhang

    Research output: Contribution to journalArticlepeer-review

    113 Citations (Scopus)

    Abstract

    In this study, Bi2WO6 quantum dots (QDs) decorating reduced graphene oxide (RGO) sheets were produced by a facile one-step hydrothermal synthesis process, which converts the reactant precursors to Bi2WO6 QDs and RGO simultaneously. The Bi 2WO6 QDs with a size of 3-5 nm anchored uniformly on the RGO sheets to form RGO-Bi2WO6 QDs composites. The RGO sheets not only acted as a supporter and stabilizer for the Bi 2WO6 QDs to prevent them from being aggregation but also largely improved the charge separation in the composite material. For this preponderance, the electron lifetime in the RGO-Bi2WO6 QDs composites was increased 8-fold compared with that of the pure Bi 2WO6 QDs. The much enhanced lifetime improved its performance in environmental purification and photovoltaic conversion under the irradiation of simulated sun light. This work not only provides a principle method to produce graphene-composited multiple metal oxide QDs by one-step process but also a route to obtain efficient functional material for environmental purification and optoelectronic applications.

    Original languageEnglish
    Pages (from-to)9113-9120
    Number of pages8
    JournalJournal of Physical Chemistry C
    Volume117
    Issue number18
    DOIs
    Publication statusPublished - May 9 2013

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films

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