TY - JOUR
T1 - Effect of CdS contents on H2 production from Pt-(CdS/TiO2) film-typed photocatalysts
AU - Hong, Eunpyo
AU - Kim, Jin Hyun
AU - Yu, Sunhye
AU - Kim, Jung Hyeun
PY - 2011/8
Y1 - 2011/8
N2 - Pt-(CdS/TiO2) film-typed photocatalysts are prepared with a doctor-blade method followed by a chemical bath deposition (CBD) process, and the films are characterized by UV-vis spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy. The film-typed structure is composed of photocatalysts and Pt metal part on a FTO substrate without additional electric device, so it is relatively simpler than the conventional photoelectrochemical cell. CdS quantum dots are introduced as a sensitizer for visible light response. Amounts of CdS quantum dots on TiO2 surface are increased with increasing CBD cycles, but they start to aggregate after certain CdS concentration due to oversaturation phenomenon. This high CdS content induces high electron losses, and therefore it reduces amounts of hydrogen production. As a result, there is a saturation point of CdS content at Cd/Ti ratio of 0. 197, and the amounts of evolved hydrogen are 5. 407 μmol/cm2·h at this photocatalyst formulation.
AB - Pt-(CdS/TiO2) film-typed photocatalysts are prepared with a doctor-blade method followed by a chemical bath deposition (CBD) process, and the films are characterized by UV-vis spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy. The film-typed structure is composed of photocatalysts and Pt metal part on a FTO substrate without additional electric device, so it is relatively simpler than the conventional photoelectrochemical cell. CdS quantum dots are introduced as a sensitizer for visible light response. Amounts of CdS quantum dots on TiO2 surface are increased with increasing CBD cycles, but they start to aggregate after certain CdS concentration due to oversaturation phenomenon. This high CdS content induces high electron losses, and therefore it reduces amounts of hydrogen production. As a result, there is a saturation point of CdS content at Cd/Ti ratio of 0. 197, and the amounts of evolved hydrogen are 5. 407 μmol/cm2·h at this photocatalyst formulation.
KW - Cadmium Sulfide
KW - Chemical Bath Deposition
KW - Hydrogen Production
KW - Photocatalyst
KW - Titanium Dioxide
UR - http://www.scopus.com/inward/record.url?scp=79961028790&partnerID=8YFLogxK
U2 - 10.1007/s11814-011-0045-1
DO - 10.1007/s11814-011-0045-1
M3 - Article
AN - SCOPUS:79961028790
SN - 0256-1115
VL - 28
SP - 1684
EP - 1687
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 8
ER -