Green synthesis of Y2O3:Dy3+ nanophosphor with enhanced photocatalytic activity

被引：45

作者：

Kumar, J. B. Prasanna ^{[1
,2
]}

Ramgopal, G. ^{[3
]}

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

Anantharaju, K. S. ^{[5
]}

Prasad, B. Daruka ^{[6
]}

Sharma, S. C. ^{[7
]}

Prashantha, S. C. ^{[5
]}

Nagaswarupa, H. P. ^{[5
]}

Kavyashree, D. ^{[8
]}

Nagabhushana, H. ^{[9
]}

机构：

[1] GFGC Tumkur, Dept Phys, Tumkur 572102, Karnataka, India

[2] Sathyabama Univ, Dept Phys, Madras 600119, Tamil Nadu, India

[3] Maharanis Sci Coll, Dept Phys, Bangalore 560001, Karnataka, India

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

[5] East West Inst Technol, Res Ctr, Dept Sci, Bangalore 560091, Karnataka, India

[6] BMS Inst Technol, Dept Phys, Bangalore 560064, Karnataka, India

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

[8] Channabasaveshwara Inst Technol, Dept Phys, Gubbi 572216, Tumkur, India

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

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 149卷

关键词：

Y2O3:Dy3+ NSs; Green route; Aloe vera gel; Nanophosphor; Photocatalytic activity; LOW-TEMPERATURE SYNTHESIS; LUMINESCENCE PROPERTIES; COMBUSTION SYNTHESIS; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE; NANOPARTICLES; MORPHOLOGY; ZNO; Y2O3EU3+; PHOSPHOR;

D O I：

10.1016/j.saa.2015.05.007

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Facile and green route was employed for the synthesis of Y2O3:Dy3+ (1-11 mol%) nanostructures (NSs) using Aloe vera gel as fuel. The formation of different morphologies of Y2O3:Dy3+ NSs were characterized by SEM, TEM and HRTEM. PXRD data and Rietveld analysis evident the formation of single phase Y2O3 with cubic crystal structure. The influence of Dy3+ ion concentration on the structure morphology, UV absorption, PL emission and photocatalytic activity of NSs were investigated. NSs exhibited an intense warm white emission with CIE chromaticity coordinates (0.32, 0.33) and average CCT value similar to 5525 K which corresponds to vertical day light. The control of Dy3+ ion on Y2O3 matrix influences the photocatalytic decolorization of Metanil Yellow as a model compound was evaluated. The enhanced photocatalytic activities of core shell structured Y2O3:Dy3+ (1 mol%) was attributed to co-operation effect of dopant concentration, crystallite size, textural properties and capability for reducing electron-hole pair recombination. Further, the recycling catalytic ability of Y2O3:Dy3+ (1 mol%) nanostructure was also evaluated and found promising photocatalytic performance with negligible decrease in decolorization efficiency even after sixth successive cyclic runs. Considering its green, facile synthesis and recyclable feature from an aqueous solution, the present Y2O3:Dy3+ (1 mol%) nanophosphor can be considered as one of the ideal photocatalyst for various potential applications. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：687 / 697

页数：11

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