Optical, photocatalytic and bactericidal properties of Zn1-xLaxO and Zn1-xMgxO nanostructures prepared by a sol-gel method

被引：38

作者：

Suwanboon, Sumetha ^{[1
,6
]}

Amornpitoksuk, Pongsaton ^{[2
,3
,6
]}

Bangrak, Phuwadol ^{[4
]}

Muensit, Nantakan ^{[5
,6
]}

机构：

[1] Prince Songkla Univ, Dept Mat Sci & Technol, Fac Sci, Hat Yai 90112, Songkhla, Thailand

[2] Prince Songkla Univ, Dept Chem, Fac Sci, Hat Yai 90112, Songkhla, Thailand

[3] Prince Songkla Univ, Ctr Excellence Innovat Chem, Fac Sci, Hat Yai 90112, Songkhla, Thailand

[4] Walailak Univ, Sch Sci, Nakhon Si Thammarat 80161, Thailand

[5] Prince Songkla Univ, Dept Phys, Fac Sci, Hat Yai 90112, Songkhla, Thailand

[6] Prince Songkla Univ, CENE, Hat Yai 90112, Songkhla, Thailand

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 05期

关键词：

Sol-gel processes; Optical properties; ZnO; Functional applications; LA-DOPED ZNO; ZINC-OXIDE; ANTIBACTERIAL ACTIVITY; NANOPARTICLES; GROWTH; APOPTOSIS; TOXICITY; CELLS;

D O I：

10.1016/j.ceramint.2012.12.075

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：

Multifunctional Zn1-xLaxO and Zn1-xMgxO nanostructures were successfully synthesized through a sol-gel method. The crystal structure, morphology, specific surface area and thermal behavior were investigated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and a thermogravimetric and differential thermal analyzer (TG-DTA), respectively. The optical properties were determined with a UV-vis spectrophotometer and a photoluminescent spectrometer. The crystallite size decreased when the La and Mg concentrations increased to x=0.05. The Zn0.9Mg0.1O nanostructure showed the widest E-g value of 3.30 eV. The Zn0.95Mg0.05O nanostructure exhibited the highest efficiency for the photocatalytic degradation of methylene blue (MB) with a rate constant (k) of 0.0440 min(-1). Both La- and Mg-doped ZnO nanostructures inhibited Staphylococcus aureus (S. aureus) and to a less extent Escherichia coli (E. coli). (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：5597 / 5608

页数：12

共 47 条

[1] ZnO nanorod-induced apoptosis in human alveolar adenocarcinoma cells via p53, survivin and bax/bcl-2 pathways: role of oxidative stress [J].