Facile green fabrication of nanostructure ZnO plates, bullets, flower, prismatic tip, closed pine cone: Their antibacterial, antioxidant, photoluminescent and photocatalytic properties

被引：174

作者：

Madan, H. R. ^{[1
]}

Sharma, S. C. ^{[2
]}

Udayabhanu ^{[3
]}

Suresh, D. ^{[3
]}

Vidya, Y. S. ^{[4
]}

Nagabhushana, H. ^{[5
]}

Rajanaik, H. ^{[6
]}

Anantharaju, K. S. ^{[7
]}

Prashantha, S. C. ^{[8
]}

Maiya, P. Sadananda ^{[9
]}

机构：

[1] Tumkur Univ, Dept Elect, Tumkur 572103, India

[2] Dayananda Sagar Univ, Bangalore 560078, Karnataka, India

[3] Tumkur Univ, Dept Studies & Res Chem, Tumkur 572103, India

[4] Lal Bahadur Shastry Govt First Grade Coll, Dept Phys, Bangalore 560032, Karnataka, India

[5] Tumkur Univ, Prof CNR Rao Ctr Adv Mat Res, Tumkur 572103, India

[6] Tumkur Univ, Dept Studies & Res Environm Sci, Tumkur 572103, India

[7] Dayananda Sagar Coll Engn, Dept Chem, Bangalore 560078, Karnataka, India

[8] East West Inst Technol, Dept Sci, Bangalore 560091, Karnataka, India

[9] Dr P Sadananda Maiya Ctr Food Sci Res, Bangalore 560011, Karnataka, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2016年 / 152卷

关键词：

ZnO nanostructures; Rietveld analysis; SEM; TEM; XPS; ZINC-OXIDE; OPTICAL-PROPERTIES; IRON-OXIDE; NANOPARTICLES; NANOPHOSPHOR; MORPHOLOGY; LUMINESCENCE; DEGRADATION; COMPOSITE; DEFECTS;

D O I：

10.1016/j.saa.2015.07.067

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Green synthesis of multifunctional Zinc oxide nanoparticles (NPs) with a variety of morphologies were achieved by low temperature solution combustion route employing neem (Azadirachta indica) extract as fuel. The nanoparticles were characterized by PXRD, FTIR, XPS, Raman and UV-Visible spectroscopic studies. The Morphologies were studied by SEM and TEM analysis. The NPs were subjected for photoluminescence, photocatalytic, antibacterial and antioxidant activity studies. PXRD pattern confirmed the hexagonal wurtzite structure of the product. SEM images indicated the transformation of mushroom like hexagonal disks to bullets, buds, cones, bundles and closed pine cone structured NPs with increase in the concentration of neem extract in reaction mixture. The NPs exhibited prominent green emission due to the presence of intrinsic defect centers. The as-formed bullet shaped ZnO with 4 ml of neem extract was found to decolorize Methylene blue (MB) under Sunlight and UV light irradiation. The antibacterial studies indicated that ZnO NPs of concentration 500, 750 and 1000 mu g resulted in significant antibacterial activity on Klebsiella aerogenes and Staphylococcus aureus but not against Escherichia coli and Pseudomonas aeruginosa in agar well diffusion method. Further, ZnO NPs exhibited significant antioxidant activity against scavenging DPPH free radicals. The current investigation demonstrated green engineering method for the synthesis of multifunctional ZnO NPs with interesting morphologies using neem extract. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：404 / 416

页数：13

共 81 条

[1] Fabrication and characterization of n-ZnO/p-AlGaN heterojunction light-emitting diodes on 6H-SiC substrates [J].