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Preparation and gaseous photocatalytic activity
of smooth potassium dititanate film |
| QIAN Qinghua1, HU Yuyan2, WEN Gaofei2, FENG Xin2, LU Xiao-hua2 |
| 1.College of Chemistry and Chemical Engineering, Nanjing University of Technology; Lianyungang Technical College; 2.College of Chemistry and Chemical Engineering, Nanjing University of Technology; |
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Abstract A new smooth potassium dititanate film was prepared by sol-gel method and characterized by thermogravimetry (TG) and differential scanning calorimetry (DSC), X-ray diffraction (XRD), atomic force microscopy (AFM), UV-Visible diffuse reflectance and Raman spectroscopy. The gaseous photocatalytic activity of smooth K2Ti2O5 films was studied using contact angle analysis from the photocatalytic decomposition of octadecyltrichlorosilane (OTS) based self-assembled monolayers (SAMs) formed on K2Ti2O5 films. The photocurrent response of the film was determined by an electrochemical method. It was shown that the films were smooth, compact, and transparent when formed on glass. Compared with TiO2 film, the K2Ti2O5 film showed wide absorption in the ultraviolet and visible region. It was found that the monolayers on K2Ti2O5 decomposed much faster than those on TiO2 under UV irradiation of 254 nm in air. The film also exhibited a stronger photoresponse and a more stable anodic photocurrent. The K2Ti2O5 film efficiently decomposes the alkylsiloxane monolayers under UV irradiation in air and it was found to be a good photocatalyst for gaseous organic pollutant treatment.
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Issue Date: 05 September 2008
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| 1 |
He M, Feng X, Lu X H, Jie X Y, Liu C, Bao N Z, Xie J W . A controllable approach for the synthesisof titanate derivatives of potassium tetratitanate fiber. Journal of Material Science, 2004, 39: 1–6.
doi:10.1023/B:JMSC.0000007726.58758.e4
|
| 2 |
Nunes L M, Cardoso V A, Airoldi C . Layered titanates in alkaline, acidic and intercalatedwith 1,8-octyldiamine forms as ion-exchangers with divalent cobalt,nickel and copper cations. Materials ResearchBulletin, 2006, 41: 1089–1096.
doi:10.1016/j.materresbull.2005.11.016
|
| 3 |
Kudo A, Kaneko E . Photochemical host-guestinteraction in Tb3+ and Eu3+ ion-exchanged K2-2xHxTi2O5 layeredoxides. Chemical Communications, 1997 : 349–350
|
| 4 |
Unal U, Ida S, Shimogawa K, Ozge Altuntasoglu O, Kazuyoshi Izawa K, Ogata C, Inoue T, Matsumoto Y . Electrochemical behavior of Ag+ intercalated layered oxides. Journal of Electroanalytical Chemistry, 2006, 595: 95–102.
doi:10.1016/j.jelechem.2006.07.021
|
| 5 |
Wallenberg L R, Sanati M, Andersson A . On The transformation mechanism of K2Ti4O9 to TiO2(B) and formation of microvoids. Microsc Microanal Microstruct, 1990, 1(5–6): 357–364.
doi:10.1051/mmm:0199000105‐6035700
|
| 6 |
Qi Y M, He Y, Cui C X, Liu S J, Wang H . Fabrication and biocompatibility in vitroof potassium titanat biological thin film/titanium alloy biologicalcomposite. Journal of functional materials, 2006, 37(10): 1638–1642 (in Chinese)
|
| 7 |
Kudo A, Kondo T . Photoluminescent and photocatalyticproperties of layered caesium titanates, Cs2TinO2n+1 (n = 2, 5, 6). Journal of Materials Chemistry, 1997, 7(5): 777–780.
doi:10.1039/a606297k
|
| 8 |
Yanagisawa M, Uchida S, Sato T . Synthesis and photochemical properties of Cu doped layeredhydrogen titanate. International Journalof Inorganic Materials, 2000, 2: 339–346..
doi: 10.1016/S1466‐6049(00)00033‐7
|
| 9 |
He M, Lu X H, Feng X, Yu L, Yang Z H . A simple approach to mesoporous fibroustitania from potassium dititanate. ChemicalCommunications, 2004 : 2202–2203
|
| 10 |
Bao N Z, Feng X, Yang Z H, Shen L M, Lu X H . Highly efficient liquid-phase photooxidationof an Azo dye methyl orange over novel nanostructured porous titanate-basedfiber of self-supported radially aligned H2Ti8O171.5H2O nanorods. EnvironmentalScience and Technology, 2004, 38: 2729–2736.
doi:10.1021/es034388k
|
| 11 |
Shen J, Yang Yang T H, Zhang Q Y, Wang J . NanoporousTiO2 coatings for infrared detectors. Journal of Sol-Gel Science and Technology, 2003, 26: 1029–1032.
doi:10.1023/A:1020781901791
|
| 12 |
Sonawane R S, Hegde S G, Dongare M K . Preparation of titanium (IV) oxide thin film photocatalystby sol-gel dip coating. Materials Chemistryand Physics, 2002, 77: 744–750.
doi:10.1016/S0254‐0584(02)00138‐4
|
| 13 |
Hench L L, West J K . The sol-gel process. Chemical Reviews, 1990, 90(1): 33–72.
doi:10.1021/cr00099a003
|
| 14 |
Zhou X F, Qian Q H, Hu Y Y, Lu X H . Preparationand characterization of smooth titanium oxide films by sol-gel method. Journal of nanjing university of technology, 2006, 8(1): 22–26 (in Chinese)
|
| 15 |
Bao N Z, Feng X, Lu X H, Shen L, Kazumichi Yanagisawa K . Low-temperature controllablecalcination syntheses of potassium dititanate. AIChE Journal, 2004, 50: 1568–1577.
doi:10.1002/aic.10167
|
| 16 |
Yu L, He M, Liu C, Lu X H, Feng X . Nano-scale mixing of TiO2·nH2O and potassium carbonate. Mater ChemPhys, 2005, 93: 342–347.
doi:10.1016/j.matchemphys.2005.03.021
|
| 17 |
Liu C, Lu X, Yu G, Zhang Q T, Xu Z Z . Role of an intermediate phase in solidstate reaction of hydrous titanium oxide with potassium carbonate. Materials Chemistry and Physics, 2005, 94: 401–407.
doi:10.1016/j.matchemphys.2005.05.022
|
| 18 |
Lee J P, Kim H K, Park C R, Park G, Kwak T H, Koo S M, Sung M M . Photocatalytic decompositionof alkylsiloxane self-assembled monolayers on titanium oxide surfaces. Journal of Physical Chemistry B, 2003, 107: 8997–9002.
doi:10.1021/jp030077k
|
| 19 |
Takahara Y K, Ikeda S, Ishino S . Asymmetrically modified silica particles: a simple particulatesurfactant for stabilization of oil droplets in water. Journal of the American Chemical Society, 2005, 127(17): 6271–6275.
doi:10.1021/ja043581r
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