Wettability and photodegradation activity of sol-gel dip-coated zinc oxide films

被引：7

作者：

da Silva, Marlon Nunes ^{[1
,2
]}

Santilli, Celso V. ^{[1
,2
]}

Pulcinelli, Sandra H. ^{[1
,2
]}

机构：

[1] Univ Estadual Paulista, Inst Chem, BR-14800900 Araraquara, SP, Brazil

[2] UNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2012年 / 63卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

ZnO films; Photocatalyst; Contact angle; Hydrophilicity; PHOTOCATALYTIC DEGRADATION; ZNO; WATER;

D O I：

10.1007/s10971-012-2721-y

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hydrophilic characteristics of zinc oxide combined with the electronic properties of this width band gap semi-conductor were used to produce transparent, anti fog and photocatalytic porous films by using a simple sol-gel dip-coating process. The observed values of contact angles (near to 10A degrees) and calculated spreading coefficients (close to zero) indicate that sol-gel dip-coated ZnO porous films show excellent wettability. The photocatalytic behavior of these films measured from methylene blue degradation is dependent on the film thickness in agreement with wettability results; as the film thickness increases from 0.1 +/- A 0.05 to 0.5 +/- A 0.05 the photocatalytic reaction rate constant increases from 0.9 x 10(-3) to 5.5 x 10(-3) min(-1).

引用

页码：230 / 234

页数：5

共 13 条

[1] Kinetic study on photocatalytic degradation of CI Acid Yellow 23 by ZnO photocatalyst [J].

Behnajady, M. A. ;

Modirshahla, N. ;

Hamzavi, R. .

JOURNAL OF HAZARDOUS MATERIALS, 2006, 133 (1-3) :226-232

[2] Photocatalytic degradation of model textile dyes in wastewater using ZnO as semiconductor catalyst [J].

Chakrabarti, S ;

Dutta, BK .

JOURNAL OF HAZARDOUS MATERIALS, 2004, 112 (03) :269-278

[3]

Gould P., 2003, MATER TODAY, V6, P44, DOI DOI 10.1016/S1369-7021(03)01131-3

[4] Superhydrophilic nano-TiO2 film with porous surface structure [J].

Huang, W. X. ;

Huang, H. ;

Li, H. ;

Zhou, Z. H. ;

Chen, H. .

MATERIALS RESEARCH INNOVATIONS, 2009, 13 (04) :459-463

[5] Enhanced photocatalytic and antibacterial activities of sol-gel synthesized ZnO and Ag-ZnO [J].

Karunakaran, C. ;

Rajeswari, V. ;

Gomathisankar, P. .

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2011, 14 (02) :133-138

[6] Contact angle of water on polystyrene thin films:: Effects of CO2 environment and film thickness [J].

Li, Yuan ;

Pham, Joseph Q. ;

Johnston, Keith P. ;

Green, Peter F. .

LANGMUIR, 2007, 23 (19) :9785-9793

[7] Deposition of TiO2 and Ag:TiO2 thin films by the polymeric precursor method and their application in the photodegradation of textile dyes [J].

Malagutti, Andrea R. ;

Mourao, Henrique A. J. L. ;

Garbin, Jose R. ;

Ribeiro, Caue .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 90 (1-2) :205-212

[8] How plants keep dry: A physicist's point of view [J].

Otten, A ;

Herminghaus, S .

LANGMUIR, 2004, 20 (06) :2405-2408

[9]

Quéré D, 2002, NAT MATER, V1, P14, DOI 10.1038/nmat715

[10] SEMICONDUCTOR CLUSTERS IN THE SOL-GEL PROCESS - QUANTIZED AGGREGATION, GELATION, AND CRYSTAL-GROWTH IN CONCENTRATED ZNO COLLOIDS [J].

SPANHEL, L ;

ANDERSON, MA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (08) :2826-2833

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