形貌可控氧化铌纳米棒阵列薄膜的合成研究

doi:10.3724/SP.J.1077.2011.01078

无机材料学报 ›› 2011, Vol. 26 ›› Issue (10): 1078-1084.DOI: 10.3724/SP.J.1077.2011.01078

形貌可控氧化铌纳米棒阵列薄膜的合成研究

柴青立, 刘磊, 潘浩, 陈洁, 余昂, 徐玫瑰, 涂洛, 周幸福

(南京工业大学化学化工学院, 材料化学工程国家重点实验室, 南京 210009)

收稿日期:2010-12-08 修回日期:2011-02-18 出版日期:2011-10-20 网络出版日期:2011-09-20
作者简介:柴青立(19850-), 男, 硕士研究生.
基金资助:
国家自然科学基金重点项目(20636020); 江苏省科技支撑计划(BE2009679); 江苏省高校自然科学研究计划(08KJB150009)

Synthesis of Morphology-controlled Niobium Oxide Nanorods Array

CHAI Qing-Li, LIU Lei, PAN Hao, CHEN Jie, YU Ang, XU Mei-Gui, TU Luo, ZHOU Xing-Fu

(College of Chemistry and Chemical Engineering, The State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China)

Received:2010-12-08 Revised:2011-02-18 Published:2011-10-20 Online:2011-09-20
Supported by:
National Natural Science Foundation of China (20636020); Science&Technology Pillar Program of Jiangsu Province (BE2009679); Natural Science Foundation of Jiangsu Province (08KJB150009)

摘要/Abstract

摘要： 以铌金属为原料, 在NH₄F和H₂O₂的体系中, 通过水热方法制备形貌可控的氧化铌纳米棒阵列薄膜. 采用XRD、SEM、TEM等对不同工艺条件下获得的产物微观形貌和组成进行了表征, 考察了水热时间、水热温度和NH₄F浓度对最终产物及形貌的影响. 研究表明: 氧化铌在NH₄F和H₂O₂共存下表现出各向异性生长特性. NH₄F用量对最终产物及形貌起重要作用, 随着 NH4F浓度的增加, Nb₂O₅薄膜形貌由多面体状颗粒, 向近圆形纳米棒阵列和无规则的纳米颗粒团聚体演变. 当NH₄F的浓度为0.5g, 水热反应温度为150℃反应10h, 氧化铌在铌金属表面定向生长为六边形的纳米棒阵列. 本文还提出了氧化铌纳米棒阵列薄膜的形成机理.

关键词: 氧化铌, 纳米棒阵列, 各向异性, 水热合成

Abstract: Morphology-controlled niobium oxide nanorods array were successfully prepared in a mixed NH₄F and H₂O₂ solution by using niobium powder as the starting materials via hydrothermal method. The morphology and composition of niobium oxide film were characterized by X-ray diffraction patterns(XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), respectively. The reaction time and hydrothermal temperature and concentration of NH₄F, which affect the final composition and morphology of niobium oxide films, were also investigated in details. The results show that niobium oxide crystal have a strong anisotropy growth in the presence of NH₄F and H₂O₂, which guides the oriented growth of hexagonal nanorods array on the niobium powder surface. The concentration of NH4F play great roles in the formation of the final products, the morphological of niobium oxide film is transformed from polyhedron granule to circular nanorods array and aggregated nanoparticles with the increase of NH₄F concentration. Niobium oxide nanorods arrays can be obtained at Nb substrate after hythermal reaction at 150℃ for 10h with adding 0.5g NH₄F. A formation mechanism is also proposed.

Key words: niobium oxide, nanorods array, anisotropy, hydrothermal synthesis

中图分类号:

O614

柴青立, 刘磊, 潘浩, 陈洁, 余昂, 徐玫瑰, 涂洛, 周幸福. 形貌可控氧化铌纳米棒阵列薄膜的合成研究[J]. 无机材料学报, 2011, 26(10): 1078-1084.

CHAI Qing-Li, LIU Lei, PAN Hao, CHEN Jie, YU Ang, XU Mei-Gui, TU Luo, ZHOU Xing-Fu. Synthesis of Morphology-controlled Niobium Oxide Nanorods Array[J]. Journal of Inorganic Materials, 2011, 26(10): 1078-1084.

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形貌可控氧化铌纳米棒阵列薄膜的合成研究

Synthesis of Morphology-controlled Niobium Oxide Nanorods Array

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