| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 217946 | Journal of Electroanalytical Chemistry | 2016 | 5 Pages |
•Undoped and nitrogen-doped graphene quantum dots (N-GQDs) were synthesized•Photoelectrochemical properties of N-GQD sensitized ZnO nanorods was investigated•Sensitized nanorods demonstrated superior photoconversion efficiency and incident photon to current conversion efficiency•N-GQDs exhibited better photoelectrochemical behavior due to strong chemical bonding and lower interfacial resistance.
Graphene quantum dots (GQDs) and nitrogen-doped graphene quantum dots (N-GQDs) have been synthesized by a hydrothermal process. Optical absorption study revealed strong ultraviolet photoabsorption for both GQDs. An additional broad absorption band in the visible region has been observed for N doped GQDs. GQDs and N-GQDs both are highly luminescent and exhibit excitation dependent emission behaviors. Photoelectrochemical properties of GQD and N-GQD sensitized ZnO nanorods have been investigated in details. GQD modified nanorod photoanodes demonstrated superior photoconversion efficiency and incident photon to current conversion efficiency (IPCE) than pristine ZnO nanorods. N-GQD sensitized nanorods exhibited better photoelectrochemical properties than pristine GQD due to higher visible photoabsorption and lower interfacial resistance.
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