A composite photocatalyst of cdS nanoparticles deposited on TiO2 nanosheets.
A nanocomposite photocatalyst consisting of deposited CdS nanoparticles on TiO2 nanosheets was fabricated by a simple one-pot method. The contact between two phases was maximized by making a composite structure of TiO2 nanosheet decorated with CdS nanoparticles. The composite photocatalyst showed higher photoactivity for hydrogen production from aqueous Na2S/Na2SO3 solution and decomposition of methylene blue under visible light irradiation (lamda > or =420 nm) compared with single component CdS nanoparticles or a physical mixture of CdS nanoparticles and TiO2 nanorods. The intentional formation of nanoscale heterojunctions between two phases appears beneficial for inducing an efficient electron-hole separation.
Jang
Jum Suk
JS
Department of Chemical Engineering/School of Environmental Engineering, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Korea.
Choi
Sun Hee
SH
Park
Hyunwoong
H
Choi
Wonyong
W
Lee
Jae Sung
JS
D019187:Cadmium Compounds / Q000737:chemistry*; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry; D008751:Methylene Blue / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D013440:Sulfides / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C009495:titanium dioxide; D006859:Hydrogen; D014025:Titanium; D008751:Methylene Blue