Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B

被引：120

作者：

Akir, Sana ^{[1
,2
]}

Barras, Alexandre ^{[2
]}

Coffinier, Yannick ^{[2
]}

Bououdina, Mohamed ^{[3
]}

Boukherroub, Rabah ^{[2
]}

Omrani, Amel Dakhlaoui ^{[1
,4
]}

机构：

[1] Ctr Natl Rech Sci Mat, Lab Physicochim Mat Mineraux & Leurs Applicat, Technopole Bordj Cedria,BP 73, Soliman 8027, Tunisia

[2] IEMN, UMR CNRS 8520, Ave Poincare,BP 60069, F-59652 Villeneuve Dascq, France

[3] Univ Bahrain, Coll Sci, Dept Phys, POB 32038, Zallaq, Bahrain

[4] Univ Jeddah, Fac Sci & Arts Khulais, Dept Chem, POB 355, Khulais 21921, Saudi Arabia

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期

关键词：

Optical properties; ZnO nanoparticles; Controlled synthesis; Photocatalytic activity; Visible light; Oxygen defects; FACILE SYNTHESIS; NANOCRYSTALS; NANOSHEETS; REDUCTION; TIO2;

D O I：

10.1016/j.ceramint.2016.03.153

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：

ZnO nanoparticles (NPs) with various morphologies were obtained at low-temperature using an economic and eco-friendly co-precipitation process. X-ray diffraction analysis confirms the formation of pure wurtzite ZnO phase with crystallite size in the 29-32 nm range, while scanning and transmission electron microscopic observations reveal various morphologies (spherical NPs, nanosheets and hexagonal prismatic NPs) as a function of the precursors mixing protocol. The estimated band gap of the as prepared NPs calculated on the basis of Kubelka-Munk function was found to be lower than the known band gap energy of bulk ZnO (3.21-3.26 eV compared to 3.37 eV) which was attributed to oxygen vacancies. Photoluminescence spectra showed that the as-prepared NPs have dissimilar amount of point defects. The strongest intensity of the visible emission was observed for spherical NPs, which implies an increased fraction of oxygen. This sample also exhibited a higher photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：10259 / 10265

页数：7

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