Structure and composition study of carbon-doped titanium oxide film combined with first principles
Tóm tắt
Carbon-doped titanium oxide (C/Ti-O) films were prepared on Si(100) wafer, stainless steel (type 304) and glass by reactive magnetron sputtering (RMS) using CO2 gas as carbon and oxygen source under room temperature (RT). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to analyze structure and composition of the as-prepared C/Ti-O film. It could be observed from XRD that the as-prepared C/Ti-O film contained TiO crystal phase structure. Ti2p XPS spectrum of the as-prepared C/Ti-O film showed that the valences of titanium were made up of Ti2+, Ti3+ and Ti4+. C1s XPS spectrum revealed that carbon was doped into titanium oxide based on the existence of the typical Ti-C bond. The optical absorption curve by ultraviolet-visible (UV-Vis) spectrophotometer showed that the C/Ti-O film appeared the remarkable red shift of absorption edge, which contributed to C substitution in O sites in amorphous TiO2. Photocatalysis test using methyl orange (MO) as indicator confirmed that the as-prepared C/Ti-O film had photocatalytic activity. Combined with the results of the tests and first-principles calculations, a potential photocatalysis mechanism was proposed.
Tài liệu tham khảo
Linsebigler AL, Lu G, Yates JT. Photocatalysis on TiO2 surfaces: Principles, mechanisms, and selected results. Chem Rev 1995, 95: 735–758.
Azevedo EB, Neto FRA, Dezotti M. TiO2-photocatalyzed degradation of phenol in saline media: Lumped kinetics, intermediates, and acute toxicity. Appl Catal B: Environ 2004, 54: 165–173.
Baran W, Makowski A, Wardas W. The effect of UV radiation absorption of cationic and anionic dye solutions on their photocatalytic degradation in the presence TiO2. Dyes Pigments 2008, 76: 226–230.
Hashimoto K, Irie H, Fujishima A. TiO2 photocatalysis: A historical overview and future prospects. Jpn J Appl Phys 2005, 44: 8269–8285.
Hung W-C, Fu S-H, Tseng J-J, et al. Study on photocatalytic degradation of gaseous dichloromethane using pure and iron ion-doped TiO2 prepared by the sol-gel method. Chemosphere 2007, 66: 2142–2151.
Li M, Zhang J, Guo D, et al. Band gap engineering of compensated (N, H) and (C, 2H) codoped anatase TiO2: A first-principles calculation. Chem Phys Lett 2012, 539-540: 175–179.
Fujii H, Inata K, Ohtaki M, et al. Synthesis of TiO2/CdS nanocomposite via TiO2 coating on CdS nanoparticles by compartmentalized hydrolysis of Ti alkoxide. J Mater Sci 2001, 36: 527–532.
Otaka H, Kira M, Yano K, et al. Multi-colored dye-sensitized solar cells. J Photoch Photobio A 2004, 164: 67–73.
In S, Orlov A, Berg R, et al. Effective visible light-activated B-doped and B, N-codoped TiO2 photocatalysts. J Am Chem Soc 2007, 129: 13790–13791.
Lee J-Y, Park J, Cho J-H. Electronic properties of N- and C-doped TiO2. Appl Phys Lett 2005, 87: 011904.
Yu Y, Wu H-H, Zhu B-L, et al. Preparation, characterization and photocatalytic activities of F-doped TiO2 nanotubes. Catal Lett 2008, 121: 165–171.
Yang K, Dai Y, Huang B. Understanding photocatalytic activity of S- and P-doped TiO2 under visible light from first-principles. J Phys Chem C 2007, 111: 18985–18994.
Wang X, Meng S, Zhang X, et al. Multi-type carbon doping of TiO2 photocatalyst. Chem Phys Lett 2007, 444: 292–296.
Yang X, Cao C, Erickson L, et al. Synthesis of visible-light-active TiO2-based photocatalysts by carbon and nitrogen doping. J Catal 2008, 260: 128–133.
Ohtani B, Ogawa Y, Nishimoto S. Photocatalytic activity of amorphous-anatase mixture of titanium(IV) oxide particles suspended in aqueous solutions. J Phys Chem B 1997, 101: 3746–3752.
Randorn C, Wongnawa S, Boonsin P. Bleaching of methylene blue by hydrated titanium dioxide. ScienceAsia 2004, 30: 149–156.
Zhang Z, Maggard PA. Investigation of photocatalytically-active hydrated forms of amorphous titania, TiO2·nH2O. J Photoch Photobio A 2007, 186: 8–13.
Li J, Liu S, He Y, et al. Adsorption and degradation of the cationic dyes over Co doped amorphous mesoporous titania-silica catalyst under UV and visible light irradiation. Microporous Mesoporous Mater 2008, 115: 416–425.
Kanna M, Wongnawa S, Buddee S, et al. Amorphous titanium dioxide: A recyclable dye remover for water treatment. J Sol-Gel Sci Technol 2010, 53: 162–170.
Wang H, Zong Z, Yan Y, et al. First-principles study of ferromagnetism in N doped TiO2 and TiO. J Magn Magn Mater 2012, 324: 2858–2860.
Zhang Y, Ma X, Chen P, et al. Effect of the substrate temperature on the crystallization of TiO2 films prepared by DC reactive magnetron sputtering. J Cryst Growth 2007, 300: 551–554.
Martin N, Santo AME, Sanjinés R, et al. Energy distribution of ions bombarding TiO2 thin films during sputter deposition. Surf Coat Technol 2001, 138: 77–83.
Dang BHQ, Rahman M, MacElroy D, et al. Evaluation of microwave plasma oxidation treatments for the fabrication of photoactive un-doped and carbon-doped TiO2 coatings. Surf Coat Technol 2012, 206: 4113–4118.
Cong Y, Li X, Qin Y, et al. Carbon-doped TiO2 coating on multiwalled carbon nanotubes with higher visible light photocatalytic activity. Appl Catal B: Environ 2011, 107: 128–134.
Gu D, Lu Y, Yang B, et al. Facile preparation of micro-mesoporous carbon-doped TiO2 photocatalysts with anatase crystalline walls under template-free condition. Chem Commun 2008: 2453–2455.
Yang J, Bai H, Jiang Q, et al. Visible-light photocatalysis in nitrogen-carbon-doped TiO2 films obtained by heating TiO2 gel-film in an ionized N2 gas. Thin Solid Films 2008, 516: 1736–1742.
Fu Y, Du H, Zhang S, et al. XPS characterization of surface and interfacial structure of sputtered TiNi films on Si substrate. Mat Sci Eng A 2005, 403: 25–31.
Yang J, Dai J, Li J. Synthesis, characterization and degradation of Bisphenol A using Pr, N co-doped TiO2 with highly visible light activity. Appl Surf Sci 2011, 257: 8965–8973.
Suriye K, Praserthdam P, Jongsomjit B. Control of Ti3+ surface defect on TiO2 nanocrystal using various calcination atmospheres as the first step for surface defect creation and its application in photocatalysis. Appl Surf Sci 2007, 253: 3849–3855.
Hamdy MS, Amrollahi R, Mul G. Surface Ti3+ containing (blue) titania: A unique photocatalyst with high activity and selectivity in visible light-stimulated selective oxidation. ACS Catal 2012, 2: 2641–2647.
Kubokawa Y, Anpo M, Yun C. Olefin photooxidation and oxygen anion radicals on oxide surfaces. Stud Surf Sci Catal 1981, 7: 1170–1184.
Anpo M, Chiba K, Tomonari M, et al. Photocatalysis on native and platinum-loaded TiO2 and ZnO catalysts. Origin of different reactivities on wet and dry metal oxides. B Chem Soc Jpn 1991, 64: 543–551.
Gao H, Ding C, Dai D. Density functional characterization of C-doped anatase TiO2 with different oxidation state. J Mol Struc-THEOCHEM 2010, 944: 156–162.
Li F, Zhao Y, Hao Y, et al. N-doped P25 TiO2-amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity. J Hazard Mater 2012, 239-240: 118–127.