Abstract
The photoelectrochemical( PEC) performance and photocatalytic activity of Ti O2 nanorod arrays( NRs) loaded with carbon quantum dots( CQDs) were investigated. In comparison with Ti O2 NRs,the absorption ability of Ti O2 NRs loaded with CQDs was enhanced. The transient photocurrent and open-circuit potential under visible light illumination were increased of 300% and 2. 5%,respectively. After loaded with CQDs,the photocatalytic degradation efficiency of methylene blue( MB) under visible light illumination was increased from 25% to 33%. The electrochemical impedance spectra( EIS) and Mott-Schottky plots were measured to investigate the charge movement under the visible light illumination. The results suggest that the charge transfer resistance is reduced and the electron lifetime is increased for Ti O2 NRs loaded with CQDs. The loading of CQDs can induce the flat-band potential negative shift and the conduction band position raise,resulting in the enhancement of electron reduction properties.
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