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Published on: January 17, 2017
Towards efficient visible-light active photocatalysts: CdS/Au sensitized TiO2 nanotube arrays
VanManh Nguyen1, Qingyun Cai2, Craig A Grimes3
1State Key Lab of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China; Faculty of Chemical Technology, Hanoi University of Industry, Hanoi, Viet Nam.
Abstract:
A visible-light active photocatalyst, CdS/Au/TiO2 nanotube array (NTA) photoelectrode, was prepared by electrodeposition of Au nanoparticles onto TiO2 NTA with subsequent deposition of visible-light absorbable 2.4eV band-gap CdS quantum dots using successive ion layer adsorption and reaction (SILAR). The Au nanoparticles here act as electron sinks facilitating charge carrier separation. Under AM1.5G illumination a photoconversion efficiency of 4.06% was achieved for the CdS/Au/TiO2 NTA photoelectrode, suggesting the promise of the material architecture for achieving high-performance cost-effective materials.
