Preparation and Photoelectrochemical Behavior of Cu2O/TiO2 Inverse Opal Heterojunction Arrays
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The Cu2O/TiO2 inverse opal heterojunction arrays were developed by electrochemical deposition of Cu2O nanoparticles on TiO2 inverse opal arrays. The Cu2O nanoparticles completely filled the inner pores of TiO2 inverse opal film (prepared by liquid phase deposition with an average thickness of 400 nm) and covered the entire area; exhibiting high crystalline properties of anatase and cubic phase from TiO2 and Cu2O, respectively. From asymmetric current-voltage profile, it was noticeable that a heterojunction was well formed for charge transport from Cu2O to TiO2 film resulting from the enhanced charge separation yield. In addition,increased photocurrent of 0.19 mA/cm2 (versus 0.08 mA/cm2 under dark condition) was obtained at −0.35 V from the heterojunction structure in the 0.5M Na2SO4 solution.
Abstract
The Cu2O/TiO2 inverse opal heterojunction arrays were developed by electrochemical deposition of Cu2O nanoparticles on TiO2 inverse opal arrays. The Cu2O nanoparticles completely filled the inner pores of TiO2 inverse opal film (prepared by liquid phase deposition with an average thickness of 400 nm) and covered the entire area; exhibiting high crystalline properties of anatase and cubic phase from TiO2 and Cu2O, respectively. From asymmetric current-voltage profile, it was noticeable that a heterojunction was well formed for charge transport from Cu2O to TiO2 film resulting from the enhanced charge separation yield. In addition,increased photocurrent of 0.19 mA/cm2 (versus 0.08 mA/cm2 under dark condition) was obtained at −0.35 V from the heterojunction structure in the 0.5M Na2SO4 solution.
참고문헌 (15)
- B. O’Regan, "A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films", Nature, 353, pp.737~ (1991)
- T. M. Wang, "Studies on photocatalytic activity and transmittancespectra of TiO2 thin films prepared by r.f. magnetronsputtering method", Surf. Coat. Technol, 155, pp.141~ (2002)
- N. Janke, "Characterization of sputterdeposited WO3 and CeO2-x-TiO2 thinfilms for electrochromic applications", Thin Solid Films, 392, pp.134~ (2001)
- S. C. Lo, "Capability of coupled CdSe", TiO2 for photocatalytic degradation of 4-chlorophenol, 2004, pp.B114, 183~
- S. H. Kang, "Enhanced photocurrent of nitrogen-doped TiO2 filmfor dye-sensitized solar cells", Mater. Chem. Phys., 124, pp.422~ (2010)
- W. Lee, "Co-sensitization of vertically aligned TiO2 nanotubes with two different sizes of CdSe quantum dots for broad spectrum", ELECTROCHEMISTRY COMMUNICATIONS, 10, pp.1579~1582 (2008), ELSEVIER SCIENCE INC
- M. K. Lee, "High photocatalytic activity of heterojunction of zinc selenide grown on nanoscaled titanium oxide", J. Electrochem. Soc, 154, pp.P49~ (2007)
- W. Siripala, "A Cu2O", TiO2 heterojunction thin film cathode for photoelectrocatalysis, 2003, pp.77, 229~
- Y. Hou, "Fabrication of Cu2O", TiO2 nanotube heterojunctionarrays and investigation of its photoelectrochemicalbehavior, 2009, pp.95, 093108~
- N. D. Denkov, "Mechanism of formation of two-dimensional crystals from latex particles on substrates", Langmuir, 8, pp.3183~ (1992)
- N. V. Dziomkina, "Colloidal crystal assembly on topologically patterned templates", Soft Mater, 1, pp.265~ (2005)
- R. C. Schroden, "Self-modification of spontaneous emission by inverse opal silica photonic crystals", Chem. Mater., 13, pp.2345~ (2001)
- R.-M. Liang, "Effect of annealing on the electrodeposited Cu2O films for photoelectrochemical hydrogen generation", Thin Solid Films, 519, pp.7191~ (2010)
- Y. Hou, "Photoeletrocatalytic activity of a Cu2O-loaded selforganizedhighly oriented TiO2 nanotube array electrodefor 4-chlorophenol degradation", Environ. Sci.Technol, 43, pp.858~ (2009)
- J. Ghijsen, "Electronic structure of Cu2O and CuO", Phys. Rev. B, 38, pp.11322~ (1988)