Photocatalytic TiO2 on copper alloy for antimicrobial purposes

被引：23

作者：

Chung, Chi-Jen ^{[1
,2
]}

Chiang, Chung-Chien ^{[3
]}

Chen, Chang-Hsiung ^{[3
]}

Hsiao, Ching-Hung ^{[1
]}

Lin, Hsin-I ^{[1
]}

Hsieh, Ping-Yen ^{[1
]}

He, Ju-Liang ^{[1
]}

机构：

[1] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 40724, Taiwan

[2] Cent Taiwan Univ Sci & Technol, Dept Dent Lab Technol, Taichung 40601, Taiwan

[3] Ind Technol Res Inst, Mech & Syst Res Labs, Taichung 40768, Taiwan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 85卷 / 1-2期

关键词：

Arc ion plating; Photocatalytic; Titanium dioxide; Protective performance; Antimicrobial;

D O I：

10.1016/j.apcatb.2008.07.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalytic titanium dioxide (TiO2) has been developed and extensively applied due to its nontoxicity, high catalytic activity, and strong self-cleaning characteristics. The present study employs an arc ion plating technique to deposit a strongly adhered photocatalytic TiO2 coating onto bare Cu-35Zn substrate, which is commonly used in sanitary wares. The present report aims to create a TiO2 coating with antimicrobial function and satisfactory mechanical properties. The results indicate that arc ion plating can successfully deposit TiO2 onto brass substrates that are precoated with Ni/Cr. The cross-sectional morphology of TiO2 coating shows a fine and dense columnar structure of anatase with a growth rate of 5 mu m/h. The surface microhardness of the specimen deposited with TiO2 coating is 351.9 HV. The adhesive force of the coating is satisfactory with a critical load of 20.38 N and its wear resistance is far better than that of the brass substrate and Ni/Cr-precoated specimen. The coating's wear index obtained from a Taber test is 0.26. TiO2 coatings can act as an ideal passive film and thereby shows a high corrosion potential and low corrosion current in aqueous sodium chloride. The photocatalytic effect of anatase TiO2 will be activated under the incident light with energy greater than the band gap energy Eg, of TiO2. (3.2 eV, 387.5 nm), thereby providing antimicrobial function. In general, the Ni/Cr-precoated specimen incorporated with a photocatalytic TiO2 film can provide sufficient protective and antimicrobial functions to its substrate, rendering it highly feasible for commercial use. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：103 / 108

页数：6

共 39 条

[1]

American Society for Testing and Materials, 2003, G17103 ASTM

[2]

[Anonymous], 1997, E9282 ASTM

[3]

[Anonymous], 2005, G4499 ASTM

[4]

[Anonymous], 1997, HDB MINERALOGY

[5]

[Anonymous], 2003, B45603 ASTM

[6]

*ASTM, 2007, D406007 ASTM

[7] Study of physical and photocatalytic properties of titanium dioxide thin films prepared from complex precursors by chemical vapour deposition [J].

Bessergenev, VG ;

Pereira, RJF ;

Mateus, MC ;

Khmelinskii, L ;

Vasconcelos, DA ;

Nicula, R ;

Burkel, E ;

do Rego, AMB ;

Saprykin, AI .

THIN SOLID FILMS, 2006, 503 (1-2) :29-39

[8] Immobilisation of TiO2 powder for the treatment of polluted water [J].

Byrne, JA ;

Eggins, BR ;

Brown, NMD ;

McKinney, B ;

Rouse, M .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 17 (1-2) :25-36

[9] TiO2 photocatalytic films on stainless steel:: The role of Degussa P-25 in modified sol-gel methods [J].

Chen, YJ ;

Dionysiou, DD .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 62 (3-4) :255-264

[10] Correlation of structural properties and film thickness to photocatalytic activity of thick TiO2 films coated on stainless steel [J].

Chen, Yongjun ;

Dionysiou, Dionysios D. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 69 (1-2) :24-33

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