Synthesis of biogenic SnO2 nanoparticles and evaluation of thermal, rheological, antibacterial and antioxidant activities

被引：71
|
作者：
Kumari, M. Meena [1 ]
Philip, Daizy [1 ]
机构：
[1] Mar Ivanios Coll, Dept Phys, Thiruvananthapuram 695015, Kerala, India
来源：
POWDER TECHNOLOGY | 2015年 / 270卷
关键词：
SnO2; nanoparticles; Photoluminescence; Thermal conductivity; Viscosity; Antioxidant; Antibacterial activity; MICROWAVE-ASSISTED SYNTHESIS; OXIDE NANOPARTICLES; GOLD NANOPARTICLES; OPTICAL-PROPERTIES; LUMINESCENCE PROPERTIES; ZNO NANOPARTICLES; CONDUCTIVITY; BEHAVIOR; SIZE; GROWTH;
D O I：
10.1016/j.powtec.2014.10.034
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Quantum confined SnO2 nanoparticles with tunable band gap are synthesized at room temperature using biogenic method. The crystalline and morphological changes during heat treatment of the synthesized samples are discussed using XRD and TEM analysis. Better visible emission intensity is observed at an excitation wavelength of 265 nm for the nanoparticles. Nanofluids with concentrations of SnO2 nanopartides up to 25 weight percentage are used for the thermal conductivity and rheological studies. A thermal conductivity enhancement of 24% is observed within the selected range whereas the viscosity is found to be independent of shear rate for all chosen concentration of SnO2/ethylene glycol nanofluids. The in vitro antioxidant study of samples treated at two different temperatures using DPPH assay provide the possibility of improving radical scavenging activity by varying the preparation conditions. The increased presence of SnO2 nanoparticles enhances the antibacterial activity of the nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：312 / 319
页数：8
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