tailieunhanh - Báo cáo hóa học: " Morphology-Controllable Synthesis of CeO2 on a Pt Electrode"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Morphology-Controllable Synthesis of CeO2 on a Pt Electrode | Nanoscale Res Lett 2008 3 431-434 DOI S11671-008-9177-6 NANO EXPRESS Morphology-Controllable Synthesis of CeO2 on a Pt Electrode Y. Fu Z. D. Wei M. B. Ji L. Li P. K. Shen J. Zhang Received 13 August 2008 Accepted 11 September 2008 Published online 30 September 2008 to the authors 2008 Abstract Nanoscale cerium dioxides with shape of nanoparticles nanorods and nanotubes were electrochemically synthesized. The morphology of CeO2 was modulated by changing electrode potential and potential direction. CeO2 nanorods and CeO2 nanotubes were synthesized via the potentiostatic and cyclic voltammeteric methods respectively. The morphology and structure of the obtained CeO2 were characterized by field emission scanning electron microscope FESEM and X-ray diffraction XRD . A possible formation mechanism has been suggested to illuminate the relationship between the preparation condition and the morphology of CeO2. Keywords CeO2 Nanorod Nanotube Electrosynthesis Y. Fu Z. D. Wei State Key Laboratory of Power Transmission Equipment System Security and New Technology Chongqing University Chongqing 400044 China e-mail zdwei@ Y. Fu Z. D. Wei School of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China Z. D. Wei M. B. Ji L. Li J. Zhang School of Material Science and Engineering Chongqing University Chongqing 400044 China P. K. Shen The State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University Guangzhou 510275 China e-mail stsspk@ Introduction The one-dimension 1D nanostructure has attracted much attention since the discovery of carbon nanotubes CNTs in 1952 1 and has offered great potential for applications in the electric devices sensors and others uses 2 . Controlled synthesis of inorganic nanoparticles now is one of the important topics in colloid and material chemistry for their shape-dependent properties and potentials of selfassembly as building blocks-artificial atoms with diverse .