Cobalt-doped cerium oxide nanoparticles: Enhanced photocatalytic activity under UV and visible light irradiation
作者： Jayapalan Saranya , Kugalur Shanmugam Ranjith , Padmanaban Saravanan , Devanesan Mangalaraj , Ramasamy Thangavelu Rajendra Kumar
DOI: 10.1016/J.MSSP.2014.03.054
关键词:
摘要: Abstract CeO2 nanoparticles (NPs) were synthesized by coprecipitation using cerium(III) nitrate hexahydrate as the precursor and ethanol solvent. Different concentration of cobalt-doped cerium oxide NPs (3mol % 6 mol %) prepared adding various concentrations cobalt chloride to nitrate. The as-synthesized characterized through X-ray diffraction (XRD) measurements, ultraviolet (UV)–visible spectroscopy, Photoluminescence (PL) transmission electron microscopy (TEM). XRD results reveal that as-prepared had a face-centered cubic structure with crystallite size in range 5–8 nm. TEM analyses showed Co-doped homogenous distribution (sizes within 5–12 nm). Band-edge absorption redshifted upon increasing Co compared undoped NPs. PL spectra peak shift emission doping, which due an increase oxygen defects localized between Ce4f O2p energy levels (i.e., via formation Ce3+ states). Photocatalytic degradation methylene blue aqueous solution under UV visible (sunlight) irradiation presence pure was investigated. efficiency photocatalytic increased both light. (6 mol%) efficiencies 98% 89% at 420 min exposure light, respectively.
sci-hub.se 参考文章(33)
Liquan Chen, Chunwen Sun, Hong Li, Huairuo Zhang, Zhaoxiang Wang, Controlled synthesis of CeO2 nanorods by a solvothermal method Nanotechnology. ,vol. 16, pp. 1454- 1463 ,(2005) , 10.1088/0957-4484/16/9/006
Biswajit Choudhury, Amarjyoti Choudhury, Ce3+ and oxygen vacancy mediated tuning of structural and optical properties of CeO2 nanoparticles Materials Chemistry and Physics. ,vol. 131, pp. 666- 671 ,(2012) , 10.1016/J.MATCHEMPHYS.2011.10.032
Mickaël Palard, Jérémy Balencie, Aude Maguer, Jean-François Hochepied, Effect of hydrothermal ripening on the photoluminescence properties of pure and doped cerium oxide nanoparticles Materials Chemistry and Physics. ,vol. 120, pp. 79- 88 ,(2010) , 10.1016/J.MATCHEMPHYS.2009.10.025
Lin Yue, Xiao-Ming Zhang, Structural characterization and photocatalytic behaviors of doped CeO2 nanoparticles Journal of Alloys and Compounds. ,vol. 475, pp. 702- 705 ,(2009) , 10.1016/J.JALLCOM.2008.07.096
P. Patsalas, S. Logothetidis, L. Sygellou, S. Kennou, Structure-dependent electronic properties of nanocrystalline cerium oxide films Physical Review B. ,vol. 68, pp. 035104- ,(2003) , 10.1103/PHYSREVB.68.035104
Yinglin Liu, Zainovia Lockman, Azizan Aziz, Judith MacManus-Driscoll, Size dependent ferromagnetism in cerium oxide (CeO2) nanostructures independent of oxygen vacancies Journal of Physics: Condensed Matter. ,vol. 20, pp. 165201- ,(2008) , 10.1088/0953-8984/20/16/165201
Nan Zhang, Siqi Liu, Yi-Jun Xu, Recent progress on metal core@semiconductor shell nanocomposites as a promising type of photocatalyst Nanoscale. ,vol. 4, pp. 2227- 2238 ,(2012) , 10.1039/C2NR00009A
Friedrich Esch, Stefano Fabris, Ling Zhou, Tiziano Montini, Cristina Africh, Paolo Fornasiero, Giovanni Comelli, Renzo Rosei, Electron localization determines defect formation on ceria substrates. Science. ,vol. 309, pp. 752- 755 ,(2005) , 10.1126/SCIENCE.1111568
Y. Q. Song, H. W. Zhang, Q. Y. Wen, Hao Zhu, John Q. Xiao, Co doping effect on the magnetic properties of CeO2 films on Si(111) substrates Journal of Applied Physics. ,vol. 102, pp. 043912- ,(2007) , 10.1063/1.2761847
Guofeng Wang, Qiuying Mu, Ting Chen, Yude Wang, Synthesis, characterization and photoluminescence of CeO2 nanoparticles by a facile method at room temperature Journal of Alloys and Compounds. ,vol. 493, pp. 202- 207 ,(2010) , 10.1016/J.JALLCOM.2009.12.053