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TiO2 particle single layer and SiO2-TiO2 particle double layers on glass substrate are obtained by self-assembly technique. For SiO2-TiO2 particle double layers, SiO2 Particle layer is made by spin-coating with SiO2 particles closely packed,while TiO2 Particle layer is obtained through layer-by-layer method in both cases of TiO2 particle single layer and SiO2-TiO2 particle double layers, with TiO2 particles non- closely packed. The theoretical roughness of TiO2 particle single layer and SiO2-TiO2 particle double layers are analyzed. Microstructures of these two coatings are studied with scanning electron microscope. Water contact angles before and after exposure to UV light are measured by drop meter separately. Light catalytic ability of organics degradation is determined by spectrophotometer. The experimental results show that the water contact angles of the as-prepared particle films increase if these coatings are stored in dark for days till the contacts become stable, while if exposed to UV light, they become super-hydrophilic with contact angles approaching 0°,that the roughness greatly affects water contact angle, and that the catalytic ability of SiO2-TiO2 particle double layers is superior to TiO2 particle single layer.
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Keywords:
- self-cleaning /
- surface roughness /
- photo-catalytic /
- self-assembling
[1] Zhao Z Y, Liu Q J, Zhu Z Q, Zhang J 2008 Acta. Phys. Sin. 57 3760 (in Chinese)[赵宗彦、 柳清菊、 朱忠其、 张 瑾 2008 物理学报 57 3760]
[2] Xu H, Wang S L, Liu A P, Chen B Y, Tang W H 2010 Acta. Phys. Sin. 59 3601(in Chinese)[徐 蕙、 王顺利、 刘爱萍、 陈本永、 唐为华 2010 物理学报 59 3601]
[3] Zhang X T, Fujishima.A, M Jin, Emiline M V, Murakami T 2006 J. Phys. Chem. 110 25142
[4] Cai R, Van G M, Aw P K, Itoh K 2006 C. R. Chimie 9 829
[5] Fujishima A, Rao T N, Tryk D A 2000 J. Photochem. Photobiol. C 1
[6] Guan K 2005 Surf. Coat. Technol 191 155
[7] Zhang X T, Fujishima A, Jin M, Emiline M V, Murakami T 2006 J. Phys. Chem. 110 25142
[8] Patankar N A 2003 Langmuir. 19 1249
[9] Guan K 2005 Surf. Coat. Technol. 191 155
[10] Zhang X T, Sato O, Taguchi M, Einaga Y, Murakami T, Fujishima A 2005 Chem. Mater 17
[11] Lee D, Rubner M F, Cohen R E 2006 Nano Lett. 6 2305696
[12] Allain E, Besson Sophie, Durand C, Moreau M, Gacoin T, Boilot J P 2007Adv. Funct. Mater. 17 549
[13] Wang X D, Dong P, Chen S L, Yi G Y 2007 Acta. Phys. Sin 56 1831(in Chinese)[王晓东、 董 鹏、 陈胜利、 仪桂云 2007 物理学报 56 1831]
[14] Lee D, Omolade D, Cohen R E, Rubner M F 2007 Chem. Mater 19 1427
[15] Parkin I P, Palgrave R G 2004 J. Mater. Chem. 15 1689
[16] Wang R, Hashimoto K, Fujishima A, Chikuni M, Kojima E, Kitamura A, Shimohigoshi M, Watanabe T 1998 Adv. Mater. 10 135
[17] Wenzel R N 1949 J. Phys. Chem. 53 1466
[18] Patankar N A 2004 Langmuir 20 8209
[19] Hu L H, Dai J, Liu W Q, Wang K J, Dai S Y 2009 Acta. Phys. Sin. 58 1115(in Chinese)[胡林华、 戴 俊、 刘伟庆、 王孔嘉、 戴松元 2009 物理学报 58 1115]
[20] Carneiro J O, Teixeira V, Portinha A, Magalh A, Coutinho P, Tavares C J, Newton R 2007 Mater. Sci.Eng. A 138 144
[21] Stöber W, Fink A, Bohn E 1968 J. Colloid Interface Sci. 26 62
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[1] Zhao Z Y, Liu Q J, Zhu Z Q, Zhang J 2008 Acta. Phys. Sin. 57 3760 (in Chinese)[赵宗彦、 柳清菊、 朱忠其、 张 瑾 2008 物理学报 57 3760]
[2] Xu H, Wang S L, Liu A P, Chen B Y, Tang W H 2010 Acta. Phys. Sin. 59 3601(in Chinese)[徐 蕙、 王顺利、 刘爱萍、 陈本永、 唐为华 2010 物理学报 59 3601]
[3] Zhang X T, Fujishima.A, M Jin, Emiline M V, Murakami T 2006 J. Phys. Chem. 110 25142
[4] Cai R, Van G M, Aw P K, Itoh K 2006 C. R. Chimie 9 829
[5] Fujishima A, Rao T N, Tryk D A 2000 J. Photochem. Photobiol. C 1
[6] Guan K 2005 Surf. Coat. Technol 191 155
[7] Zhang X T, Fujishima A, Jin M, Emiline M V, Murakami T 2006 J. Phys. Chem. 110 25142
[8] Patankar N A 2003 Langmuir. 19 1249
[9] Guan K 2005 Surf. Coat. Technol. 191 155
[10] Zhang X T, Sato O, Taguchi M, Einaga Y, Murakami T, Fujishima A 2005 Chem. Mater 17
[11] Lee D, Rubner M F, Cohen R E 2006 Nano Lett. 6 2305696
[12] Allain E, Besson Sophie, Durand C, Moreau M, Gacoin T, Boilot J P 2007Adv. Funct. Mater. 17 549
[13] Wang X D, Dong P, Chen S L, Yi G Y 2007 Acta. Phys. Sin 56 1831(in Chinese)[王晓东、 董 鹏、 陈胜利、 仪桂云 2007 物理学报 56 1831]
[14] Lee D, Omolade D, Cohen R E, Rubner M F 2007 Chem. Mater 19 1427
[15] Parkin I P, Palgrave R G 2004 J. Mater. Chem. 15 1689
[16] Wang R, Hashimoto K, Fujishima A, Chikuni M, Kojima E, Kitamura A, Shimohigoshi M, Watanabe T 1998 Adv. Mater. 10 135
[17] Wenzel R N 1949 J. Phys. Chem. 53 1466
[18] Patankar N A 2004 Langmuir 20 8209
[19] Hu L H, Dai J, Liu W Q, Wang K J, Dai S Y 2009 Acta. Phys. Sin. 58 1115(in Chinese)[胡林华、 戴 俊、 刘伟庆、 王孔嘉、 戴松元 2009 物理学报 58 1115]
[20] Carneiro J O, Teixeira V, Portinha A, Magalh A, Coutinho P, Tavares C J, Newton R 2007 Mater. Sci.Eng. A 138 144
[21] Stöber W, Fink A, Bohn E 1968 J. Colloid Interface Sci. 26 62
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