硫化鎘與硒化鎘敏化TiO2光電極在光電化
學系統產氫之研究

廖士懿

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硫化鎘與硒化鎘敏化TiO2光電極在光電化學系統產氫之研究

Photoelectrochemical hydrogen generation by CdS- and CdSe- sensitized TiO2 photoelectrodes.

廖士懿 , Masters　　Advisor：李玉郎　　

繁體中文

硒化鎘；硫化鎘；化學浴沈積；水分解產氫；硫化鋅；熱處理； CdS ； CBD ； CdSe ； water splitting ； ZnS ； thermal-treatment

Abstract │ Reference (70) │ Times Cited (1) │ Altmetrics

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These studies utilize the method of chemical bath deposition (CBD) to assemble, CdS and CdSe onto porous TiO2 films as sensitizer for photoelectrochemical hydrogen generation. The sensitizer incorporated amount and co-sensitized effect on photoelectrochemical conversion efficiency were discussed in this study. The results show that the CdS/CdSe co-sensitized photoelectrode has not only a complementary effect in light harvest and the cascade structure, TiO2/CdS(4)/CdSe(4), but leads to a stepwise structure of band-edge levels which is advantageous to the electron injection and hole-recovery of the system. The energy conversion efficiency (ECE) achieved by the TiO2/CdS(4)/CdSe(4) electrode under illumination (AM1.5, UV cut-off, 100 mW/cm2) is 7.4%. Zinc Sulfide (ZnS) was further deposited as passivation layer to improve the photoelectrode stability and reduce leakage current. The corresponding hydrogen evolved rate measured for the TiO2/CdS(4)/ CdSe(4)/ZnS electrode is 210 µmol．cm-2．h-1. Further, thermal-treatment process was used to improve TiO2/sensitizer interface and increase sensitizer crystallinity, the electron transfer ability of photoelectrodes and decrease the electrode defects. At the temperature of 300℃ and 150℃, the electrode TiO2/CdS(4)300℃/CdSe(4)150℃ had the highest photocurrent density about 17 mA/cm2 and ECE is 10.6%.

Reference ( 70 ) 〈TOP〉

2. Mitsugi, C., A. Harumi, and F. Kenzo, WE-NET: Japanese hydrogen program. International Journal of Hydrogen Energy, 1998. 23(3): p. 159-165.
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3. Thomas, C.E., B.D. James, and F.D. Lomax, Market penetration scenarios for fuel cell vehicles. International Journal of Hydrogen Energy, 1998. 23(10): p. 949-966.
連結：
4. Veziroglu, T.N., Dawn of the hydrogen age. International Journal of Hydrogen Energy, 1998. 23(12): p. 1077-1078.
連結：
6. The Economist Technology. 2001. p. 29.
連結：
7. Ajay K. Ray, A.A.C.M.B., Novel photocatalytic reactor for water purification. AIChE Journal, 1998. 44(2): p. 477-483.
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Times Cited (1) 〈TOP〉

卓訓瑋(2010)。自組裝單分子膜及熱處理效應對CdS敏化TiO2光電極效能的研究。成功大學化學工程學系學位論文。2010。1-114。

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