Preparation, characterization, photoactivity and XPS studies of Ln2ZrTiO7 (Ln = Sm and Nd)

被引：62

作者：

Kumar, B. Vijaya ^{[1
]}

Velchuri, Radha ^{[1
]}

Prasad, G. ^{[2
]}

Sreedhar, B. ^{[3
]}

Ravikumar, K. ^{[4
]}

Vithal, M. ^{[1
]}

机构：

[1] Osmania Univ, Dept Chem, Hyderabad 500007, Andhra Pradesh, India

[2] Osmania Univ, Dept Phys, Hyderabad 500007, Andhra Pradesh, India

[3] Indian Inst Chem Technol, Inorgan & Phys Chem Div, Hyderabad 500007, Andhra Pradesh, India

[4] Indian Inst Chem Technol, Lab Xray Crystallog, Hyderabad 500007, Andhra Pradesh, India

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 04期

关键词：

Sol-gel; Transmission electron microscopy; Powder XRD; Photocatalytic activity; RAY PHOTOELECTRON-SPECTROSCOPY; PYROCHLORE STRUCTURE; VIBRATIONAL-SPECTRA; MAGNETIC ORDER; FORCE-FIELD; MAS NMR; TRANSITION; DISORDER; A(2)B(2)O(7); DIFFRACTION;

D O I：

10.1016/j.ceramint.2010.01.019

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：

Oxides of composition Ln(2)ZrTiO(7) (Ln = Sm and Nd) were prepared by sol gel method and characterized by powder X-ray diffraction (XRD), energy dispersive spectra (EDS), Raman, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). These compounds were crystallized in the disordered pyrochlore structure in cubic lattice with Fd (3) over barm space group. The TEM images of Sm2ZrTiO7 and Nd2ZrTiO7 prepared at 600 degrees C gave the particle size of 13 and 21 nm respectively. The photocatalytic activity of products was studied using photodegradation of methyl orange under UV light irradiation. The photocatalytic activity of these oxides was found to be less than that of La2Zr2O7 and Nd2Zr2O7. The 3d profile of Nd2ZrTiO7 gave satellite peaks on the low binding energy side in the XPS spectrum which were absent in the XPS spectrum of Sm2ZrTiO7. The reasons for the observation of satellite peaks were given. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1347 / 1355

页数：9

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