Synthesis of photocatalytic La(1-x) AxTiO3.5-δ (A=Ba, Sr, Ca) nano perovskites and their application for photocatalytic oxidation of congo red dye in aqueous solution

被引：46

作者：

Bradha, M. ^{[1
]}

Vijayaraghavan, T. ^{[1
]}

Suriyaraj, S. P. ^{[2
]}

Selvakumar, R. ^{[2
]}

Ashok, Anuradha M. ^{[1
]}

机构：

[1] PSG Inst Adv Studies, Nanotech Res Facil, Coimbatore 641004, Tamil Nadu, India

[2] PSG Inst Adv Studies, Nanobiotechnol Lab, Coimbatore 641004, Tamil Nadu, India

来源：

JOURNAL OF RARE EARTHS | 2015年 / 33卷 / 02期

关键词：

nano perovskite; oxidation; photocatalyst; congo red; dye degradation; rare earths; HYDROTHERMAL SYNTHESIS; THERMAL-STABILITY; DEGRADATION; BEHAVIOR; REDUCTION; SURFACE;

D O I：

10.1016/S1002-0721(14)60397-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A-site substituted La(0.8)A(0.2)TiO(3.5-delta) (A=Ba, Sr, Ca) nano perovskites were prepared by sol-gel method and characterized using thermogravimetry/differential thermal analysis (TGA/DTA), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy and transmission electron microscopy (TEM). XRD analysis showed that the La(0.8)A(0.2)TiO(3.5-delta) (A=Ba, Sr, Ca) nano perovskites derived after calcination at 800 degrees C were in single phase with orthorhombic structure. The particle size of all nano perovskites was found to be similar to 20 nm. The synthesized nano perovskites were tested for the photocatalytic decomposition of an azo dye, Congo red. The sequential behavior of La(0.8)A(0.2)TiO(3.5-delta) (A=Ba, Sr, Ca) nanoperovskites for photocatalytic decomposition of congo red in aqueous solution by visible light at room temperature was studied at various time intervals and the efficiency of degradation of the nanoperovskites was compared. Among all the A-site substituted La(0.8)A(0.2)TiO(3.5-delta) (A=Ba, Sr, Ca) nano perovskites, Ba substituted compound showed the highest dye degradation.

引用

页码：160 / 167

页数：8

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