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Chinese Journal of Materials Research  2012, Vol. 26 Issue (5): 476-482    DOI:
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Preparation and Photocatalytic Properties of La0.7Sr0.3MnO3 Nanoparticles
WANG Yufeng2, YANG Hua1,2,  XIAN Tao1,2,  ZHANG Haimin2,  SU Junyan2
1.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050
2.School of Science, Lanzhou University of Technology, Lanzhou 730050
Cite this article: 

WANG Yufeng YANG Hua XIAN Tao ZHANG Haimin SU Junyan. Preparation and Photocatalytic Properties of La0.7Sr0.3MnO3 Nanoparticles. Chinese Journal of Materials Research, 2012, 26(5): 476-482.

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Abstract  

La0.7Sr0.3MnO (LSMO) nanoparticles were synthesized by a polyacrylamide gel technique. X-ray diffraction and scanning electron microscope were adopted to characterize the as-prepared samples. The results show that single-phase LSMO nanoparticles can be prepared by calcination at 600℃ using citric acid, tartaric acid, acetic acid, oxalic acid and ethylenediamine-tetraacetic acid (EDTA) as the chelating agent, respectively. The particles prepared using the five chelating agents are like spheres, and
the citric acid-derived particles exhibit the best particle shape. The average particle size of five samples is 24, 28, 36, 38, and 50 nm, respectively. The photocatalytic properties of LSMO particles were evaluated by degradation of methyl red (MR) in ethanol/water solution under irradiation of visible-light tungsten lamp. The results show that the adsorption and photocatalytic degradation of MR are highly dependent on the H2O content in the reactive mixture. Among the samples, the citric acid-derived particles exhibit the highest photocatalytic activity. The direct hole oxidation is suggested to be the main mechanism toward the MR degradation.

Key words:  inorganic non-metallic materials      La0.7Sr0.3MnO3       polyacrylamide gel method      chelating agents      photocatalysis     
Received:  27 June 2012     
ZTFLH:  TB321  
Fund: 

Supported by National Natural Science Foundation of China No.50962009.

URL: 

https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2012/V26/I5/476

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