Synthesis of new (Bi, La)3MSb2O11 phases (M = Cr, Mn, Fe) with KSbO3-type structure and their magnetic and photocatalytic properties

Bulletin of materials science

A K Shukla²  M Sathiya¹  K Ramesha¹  A S Prakash¹  Giridhar Madras² 

[1] CSIR Central Electrochemical Research Institute-Madras Unit, CSIR-Madras Complex, Taramani, Chennai 600 113, India$$CSIR Central Electrochemical Research Institute-Madras Unit, CSIR-Madras Complex, Taramani, Chennai 600 113, IndiaCSIR Central Electrochemical Research Institute-Madras Unit, CSIR-Madras Complex, Taramani, Chennai 600 113, India$$;Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India$$Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, IndiaSolid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India$$

关键词: A3B3O11;    KSbO3;    magnetism;    synthesis;    crystal structure;    photocatalysis.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Synthesis and structure of new (Bi, La)₃MSb₂O₁₁ phases (M = Cr, Mn, Fe) are reported in conjunction with their magnetic and photocatalytic properties. XRD refinements reflect that Bi₃CrSb₂O₁₁, Bi₂LaCrSb₂O₁₁, Bi₂LaMnSb₂O₁₁ and Bi₂LaFeSb₂O₁₁ adopt KSbO₃-type structure (space group,r{3}$). The structure can be described through three interpenetrating networks where the first is the (M/Sb)O₆ octahedral network and other two are the identical networks having Bi₆O₄ composition. The magnetic measurements on Bi₂LaCrSb₂O₁₁ and Bi₂LaMnSb₂O₁₁ show paramagnetic behaviour with magnetic moments close to the expected spin only magnetic moments of Cr⁺³ and Mn⁺³. The UV-Visible diffuse reflectance spectra are broad and indicate that these materials possess a bandgap of ∼ 2 eV. The photocatalytic activity of these materials has been investigated by degrading Malachite Green (MG) under exposure to UV light.

【 授权许可】

Unknown