Band-Gap Engineering and Enhanced Photocatalytic Activity of Sm and Mn Doped BiFeOb>3b> Nanoparticles

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• 作者：Syed Irfan ; Yang Shen ; Syed Rizwan ; Huan-Chun Wang ; Sadaf B. Khan and Ce-Wen Nan
• 刊名：Journal of the American Ceramic Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：100
• 期：1
• 页码：31-40
• 全文大小：3202K
• ISSN：1551-2916

文摘

Bib>1-xb>Smb>xb>Feb>1-yb>Mnb>yb>Ob>3b> (BSFMO, x = 0.0, 0.05; y = 0.0, 0.05, 0.10, 0.15, 0.20, 0.25) nanoparticles were synthesized by using double solvent sol–gel method. Photocatalytic activity was investigated under UV and visible-light illumination. The structural, morphological, and optical properties were analyzed by X-ray diffraction, scanning electron microscopy, and UV-vis spectroscopy respectively. The crystallite size of BiFeOb>3b> (BFO) decreases from (57.3–17.2 nm) with the increase in Sm and Mn-doping concentration. The surface morphology shows that the pure and Sm-doped BFO nanoparticles are irregular in shape but changes to spherical shape after Mn-doping up to 25%. The band-gap engineering of BFO nanoparticles is achieved by co-doping of Sm and Mn. The band-gap of BFO could be tuned successfully from 2.08–1.45 eV, which may be due to the distortion induced in Fe-O octahedron and the rearrangement of molecular orbitals. These results give rise to enhanced photocatalytic activity by degradation of organic dyes (MB, CR, and MV) under the visible-light illumination.