Self-cleaning oxidate film and preparation method and usage thereof

Abstract

The invention discloses a self-cleaning oxide film, which is doped by SrTiO3 of different valent state metal ions as X: SrTiO3, wherein X is one of Cr3+, Zn2+, Al3+, Ga3+, Ge3+, In3+, W6+, Ta5+, Nb5+ or V5+ with doped density at 0.01-10mol%. The making method comprises the following steps: weighing organic salt or nitrate of raw material X according to doped density of X; adding (CH3COO) 2Sr.0.5H2O, Ti (OC2H5) 4 and raw materials into carbinol; adding acetic acid; heating; stirring until the liquid is transparent; blending three carbinol with Sr2+, Ti4+ and X; stirring until transparent; adjusting density through carbinol; adjusting pH value through acetic acid or ammonia; sedimenting the composite solution on the substrate through whirl coating equipment; annealing in the pipe-typed furnace to obtain the first layered film; sedimenting for several times until the thickness of film reaches 10nm-1um; placing film in the pipe-typed furnace to anneal; crystallizing film completely; fitting for purifying local indoor air as coating of building surface, mirror surface, metal surface and ceramic surface.

Description

1. Technical field [0001] The invention belongs to the field of inorganic non-metallic materials and functional ceramic thin film materials, and in particular relates to an oxide thin film with self-cleaning function applied to environmental purification, a preparation method and application thereof. 2. Background technology [0002] In recent years TiO 2 The photo-induced hydrophilicity transition and the properties of decomposing environmentally harmful substances on the surface of single crystal and polycrystalline thin films have been widely studied [Document 1: R.Wang, K.Hashimoto, A.Fujishima, M.Chikuni, E.Kojima, A. Kitamura, M. Shimohigoshi, T. Watanabe, Nature 388, 431 (1997); Document 2: R. Wang, N. Sakai, A. Fujishima, T. Watanabe, K. Hashimoto, J. Phys. Chem. B 103, 2188 (1999)]. TiO 2 These properties of the film have been widely used, such as self-cleaning coatings on building surfaces, anti-fog coatings on car rear-view mirrors, bactericidal coatings on bui...

AI Technical Summary

Problems solved by technology

In addition TiO 2 Thin films are insulators and their electrical conductivity is very low

These characteristics limit the TiO 2 Some applications of thin films

In addition, due to

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