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      Upconversion and downconversion fluorescent graphene quantum dots: ultrasonic preparation and photocatalysis.

      1 , ,
      ACS nano
      American Chemical Society (ACS)

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          Abstract

          A facile ultrasonic route for the fabrication of graphene quantum dots (GQDs) with upconverted emission is presented. The as-prepared GQDs exhibit an excitation-independent downconversion and upconversion photoluminescent (PL) behavior, and the complex photocatalysts (rutile TiO(2)/GQD and anatase TiO(2)/GQD systems) were designed to harness the visible spectrum of sunlight. It is interesting that the photocatalytic rate of the rutile TiO(2)/GQD complex system is ca. 9 times larger than that of the anatase TiO(2)/GQD complex under visible light (λ > 420 nm) irradiation in the degradation of methylene blue.

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          Author and article information

          Journal
          ACS Nano
          ACS nano
          American Chemical Society (ACS)
          1936-086X
          1936-0851
          Feb 28 2012
          : 6
          : 2
          Affiliations
          [1 ] Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China.
          Article
          10.1021/nn2040395
          22221037
          9ade5587-a9e2-4dcd-bdcd-91c5b5fa800c
          History

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