Abstract
This article reports on the gold nanoparticle (Au-NP) induced absorption enhancement in the hydrothermally grown titanium dioxide nanorods (TiO2-NRs). The localized surface plasmon resonance (LSPR) and transfer of electron from Au-NPs attached to the TiO2-NR have been related to their photocatalytic response. The photocurrent enhancement observed in the studies of IPCE has been explained on the basis of electrons in the conduction band of TiO2−NR. The electrons from the Au-NP to the conduction band of TiO2-NR with respect to the wavelength of the incident spectrum shows an increase in efficiency over pristine TiO2-NRs sample. Further, to investigate the role of Au-NP, an absorption spectra with its incident wavelength shows an increase in the visible spectrum in the present study. This provides an explanation for the response to the absorption of the wide bandgap semiconductor oxide which gives an opportunity to develop a hybrid structure on the transparent substrates. The better response of Au-NPs/TiO2-NRs system can be used in photocatalytic processes.
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