Enhancing the Visible-light Photocatalytic Activity of BiFeO3 by Heating in Molten Salt

Chem. J. Chinese Universities

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Enhancing the Visible-light Photocatalytic Activity of BiFeO₃ by Heating in Molten Salt

SUN Shang-Mei^1,2, PANG Guang-Sheng¹*, LI Chun-Guang¹, HUANG Yu-Liang¹, FENG Shou-Hua¹

1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China;
2. Department of Chemistry, College of Science, Yanbian University, Yanji 133002, China

Received:2007-06-29 Revised:1900-01-01 Online:2007-10-10 Published:2007-10-10
Contact: PANG Guang-Sheng

Abstract

Abstract: The visible-light photocatalytic activity of BiFeO₃ can be enhanced by treating in LiNO₃ molten salt. BiFeO₃ is prepared by pyrolysis of tartaric acid complex. The as-prepared BiFeO₃ is mixed with LiNO₃ salt by ball milling for 4 h with the molar ratio 12∶1 of LiNO₃ to BiFeO₃. The mixture was heated at 270 ℃ for 12 h, and LiNO₃ was removed from the product by washing with distilled water. The visible light photocatalytic activity is evaluated by measuring the decoloratation of Congo red aqueous solution. After heating in LiNO₃ molten salt, the decoloratation of Congo red aqueous solutions increased significantly from 31.6% to 95.4%. The enhancement of the photocatalytic activity is attributed to surface modification of BiFeO₃ by treating in LiNO₃ molten Salt.

Key words: Perovskite, Molten salt method, Photocatalytic activity

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SUN Shang-Mei^1,2, PANG Guang-Sheng¹*, LI Chun-Guang¹, HUANG Yu-Liang¹, FENG Shou-Hua¹. Enhancing the Visible-light Photocatalytic Activity of BiFeO₃ by Heating in Molten Salt[J]. Chem. J. Chinese Universities, doi: .

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Enhancing the Visible-light Photocatalytic Activity of BiFeO₃ by Heating in Molten Salt

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