Nitrogen doped Sr(2)Ta(2)O(7) coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production

Mukherji, Aniruddh, Seger, Brian, Lu, Gao Qing (Max) and Wang, Lianzhou (2011) Nitrogen doped Sr(2)Ta(2)O(7) coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production. ACS Nano, 5 5: 3483-3492. doi:10.1021/nn102469e


Author Mukherji, Aniruddh
Seger, Brian
Lu, Gao Qing (Max)
Wang, Lianzhou
Title Nitrogen doped Sr(2)Ta(2)O(7) coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production
Formatted title
Nitrogen doped Sr2Ta2O7 coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production
Journal name ACS Nano   Check publisher's open access policy
ISSN 1936-0851
1936-086X
Publication date 2011-05-24
Sub-type Article (original research)
DOI 10.1021/nn102469e
Volume 5
Issue 5
Start page 3483
End page 3492
Total pages 10
Place of publication Washington, DC, U.S.A.
Publisher American Chemical Society
Collection year 2012
Language eng
Formatted abstract
In this work we present the synthesis of a new type of nitrogen-doped tantalate, Sr2Ta2O7-xNx, which exhibited significantly increased visible light absorption and improved photocatalytic hydrogen production by 87% under solar irradiation, compared with its undoped counterpart Sr2Ta2O7. The photocatalyst also exhibited a strong capability in photoinduced reduction of exfoliated graphene oxide (GO) to graphene sheets. By using graphene as a support for a Pt cocatalyst, a new type of composite containing graphene-Pt and Sr2Ta2O7-xNx was designed, which demonstrated an additional ~80% increase in hydrogen production and an quantum efficiency of 6.45% (~177% increase from pristine undoped Sr2Ta2O7) due to the efficient charge carrier separation on the photocatalyst. This work suggests that graphene can play an important role as an electron transfer highway, which facilitates the charge carrier collection onto Pt cocatalysts. The method can thus be considered as an excellent strategy to increase photocatalytic hydrogen production in addition to a commonly applied doping method.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 07 Feb 2012, 14:16:31 EST by Professor Lianzhou Wang on behalf of School of Chemical Engineering