水热可控合成多面体BiFeO3颗粒

doi:10.3724/SP.J.1077.2011.00753

无机材料学报 ›› 2011, Vol. 26 ›› Issue (7): 753-758.DOI: 10.3724/SP.J.1077.2011.00753

水热可控合成多面体BiFeO₃颗粒

陈险峙, 杨若琳, 朱刚强, 周剑平, 吕丽, 边小兵, 刘鹏

(陕西师范大学物理与信息技术学院, 西安 710062)

收稿日期:2010-09-09 修回日期:2010-11-10 出版日期:2011-07-20 网络出版日期:2011-06-20
作者简介:陈险峙(1985-), 男, 硕士研究生. E-mail: chenxianzhi1985@126.com
基金资助:
国家自然科学基金(50972088); 中央高校基本科研业务专项基金(GK201001005)

Tunable Synthesis of Polyhedron Bismuth Ferrite Particles via Hydrothermal Route

CHEN Xian-Zhi, YANG Ruo-Lin, ZHU Gang-Qiang, ZHOU Jian-Ping, LV Li, BIAN Xiao-Bing, LIU Peng

(College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062,China)

Received:2010-09-09 Revised:2010-11-10 Published:2011-07-20 Online:2011-06-20
Supported by:
National Natural Science Foundation of China (50972088); Fundamental Research Funds for the Central Universities (GK201001005)

摘要/Abstract

摘要： 以Bi(NO)₃^.5H₂O和Fe(NO)₃^.9H₂O为水热反应原料, 选择KOH作为矿化剂合成单相BiFeO₃. 通过调节KOH浓度和升降温速率可控合成了规则的大尺度多面体BiFeO₃颗粒. 发现高碱浓度有利于合成规则多面体BiFeO₃颗粒, 合适的水热降温速率是影响高结晶度BiFeO₃颗粒合成的重要因素之一. 当KOH浓度为6和8 mol/L, 降温速率为0.2℃/min时, 产物为高结晶度准立方和截角立方颗粒, 当降温速率调节为0.1℃/min时, 产物为表面粗糙的立方八面体和截角八面体颗粒. 当KOH浓度为8 mol/L, 降温速率约为2℃/min时, 产物为表面粗糙且有孔洞的截角立方颗粒. 通过扫描电镜图片观察到其形貌演变过程并解释了大尺度多面体BiFeO₃颗粒的形成机制.

关键词: 可控水热合成, KOH 浓度及升降温速率, 单相BiFeO₃, 形成机制

Abstract: Bismuth ferrite (BiFeO₃) powders were hydrothermally synthesized by using Bi(NO)₃^.5H₂O and Fe(NO)₃^.9H₂O as starting materials, and KOH used as a mineralizer. The large-scale polyhedral BiFeO₃particles were obtained by controlling KOH concentration, heating and cooling rate. It was found that the large-scale polyhedral BiFeO₃ particles were synthesized favorably at the high KOH concentrations and an appropriate cooling rate was an important factor for synthesis of high crystallinity BiFeO₃ particles. The quasi-cubic and truncated cubic particles of high crystallinity were obtained at the KOH concentration of 6 and 8 mol/L with the cooling rate of 0.2℃/min, respectively. The rough cubo-octahedron, truncated octahedron particles were obtained by changing the cooling rate to 0.1℃/min. The rough truncated cubic particles with pores were obtained by changing the cooling rate to 2℃/min. Morphologies evolution of large-scale polyhedron bismuth ferrite particles were observed by scanning electron microscope. The formation mechanism of the regular morphologies was also discussed.

Key words: tunable hydrothermal synthesis, KOH concentration and heating and cooling rate, single phase BiFeO₃, formation mechanism

中图分类号:

O782

陈险峙, 杨若琳, 朱刚强, 周剑平, 吕丽, 边小兵, 刘鹏. 水热可控合成多面体BiFeO₃颗粒[J]. 无机材料学报, 2011, 26(7): 753-758.

CHEN Xian-Zhi, YANG Ruo-Lin, ZHU Gang-Qiang, ZHOU Jian-Ping, LV Li, BIAN Xiao-Bing, LIU Peng. Tunable Synthesis of Polyhedron Bismuth Ferrite Particles via Hydrothermal Route[J]. Journal of Inorganic Materials, 2011, 26(7): 753-758.

参考文献

[1] Arnold D C, Knight K S, Morrison F D, et al. Ferroelectric- paraelectric transition in BiFeO3: crystal structure of the orthorhombic β phase. Phys. Rev. Lett., 2009, 102(2): 027602-1-4.

[2] Selbach S M, Tybell T, Einarsrud M A, et al. The ferroic phase transitions of BiFeO3. Adv. Mater., 2008, 20(19): 3692-3696.

[3] Wang J, Neaton J B, Zheng H, et al. Epitaxial BiFeO3 multiferroic thin film heterostructures. Science, 2003, 299(5613): 1719-1722.

[4] Chu Y H, Mart L W, Holcommb M B, et al. Electrical-field control of local ferromagnetism using a magnetoelectric multiferroic. Nat. Mater., 2008, 7(6): 478-482.

[5] Sosnowska I, Peterlin-Neumaier T, Steichele E. Spiral magnetic ordering in bismuth ferrite. J. Phys. C: Solid State Phys., 1982, 15(23): 4835-4846.

[6] Han J T, Huang Y H, Wu X J, et al. Tunable synthesis of bismuth ferrites with various morphologies. Adv. Mater., 2006, 18(16): 2145-2148.

[7] Li S, Lin Y H, Zhang B P, et al. Controlled fabrication of BiFeO3 uniform microcrystals and their magnetic and photocatalytic behaviors. J. Phys. Chem. C, 2010, 114(7): 2903-2908.

[8] Gao F, Yuan Y, Wang K F, et al. Preparation and photoabsorption characterization of BiFeO3 nanowires. Appl. Phys. Lett., 2006, 89(10): 102506-1-3.

[9] Gao F, Chen X, Yin K, et al. Visible-light photocatalytic properties of weak magnetic BiFeO3 nanoparticles. Adv. Mater., 2007, 19(19): 2889-2892.

[10] Li S, Lin Y H, Zhang B P, et al. BiFeO3/TiO2 core-shell structured nanocomposites as visible-active photocatalysts and their optical response mechanism. J. Appl. Phys., 2009, 105(5): 054310-1-5.

[11] Chen Z Z, Shi E W, Yuan R L, et al. Coalescence of the crystallites under hydrothermal conditions (II): the morphology and stability energy calculation of cuprite. Science in China (Series E), 2003, 46(4): 423-431.

[12] Sun S, Zhou F, Wang L, et al. Template-free synthesis of well-defined edge polyhedral Cu2O architectures. Cryst. Growth Des., 2010, 10(2): 541-547.

[13] Sui Y M, Fu W Y, Yang H B, et al. Low temperature synthesis of Cu2O crystals: shape evolution and growth mechanism. Cryst. Growth Des. , 2010, 10(1): 99-108.

[14] 施尔畏, 陈之战, 元如林, 等. 水热结晶学. 北京: 科学出版社, 2004: 222-224.

[15] Penn R L, Banfield J F. Imperfect oriented attachment: dislocation generation in defect-free nanocrystals. Science, 1998, 281(5379): 969-971.

[16] Liang X D, Gao L, Yang S W, et al. Facile synthesis and shape evolution of single-crystal cuprous oxide. Adv. Mater., 2009, 21(20): 2068-2071.

[17] Lee S K, Choi G J, Koo K K, et al. Effect of molar ratio of KOH to Ti-isopropoxide on the formation of BaTiO3 powders by hydrothermal method. Mater. Lett., 2003, 57(15): 2201-2207.

[18] Chen C, Cheng J R, Yu S G, et al. Hydrothermal synthesis of perovskite bismuth ferrite crystallites. J. Cryst. Growth, 2006, 291(1): 135-139.

[19] 邱忠诚, 周剑平, 朱刚强, 等(QIU Zhong-Cheng, et al). 较为宽松条件下水热合成铁酸铋粉体. 无机化学学报(Chinese Journal of Inorganic Chemistry), 2009, 25(4): 751-755.

水热可控合成多面体BiFeO₃颗粒

Tunable Synthesis of Polyhedron Bismuth Ferrite Particles via Hydrothermal Route

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