高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (10): 2262.

• 研究论文 • 上一篇    下一篇

静电纺丝技术制备LaCrO4和LaCrO3纳米带及其光催化性质

孙霞,  董相廷,  王进贤,  刘桂霞   

  1. 长春理工大学化学与环境工程学院, 长春 130022
  • 收稿日期:2010-12-13 修回日期:2011-09-09 出版日期:2011-10-10 发布日期:2011-09-11
  • 通讯作者: 董相廷 E-mail:dongxiangting888@yahoo.com.cn
  • 基金资助:

    国家自然科学基金(批准号:   50972020)、吉林省科技发展计划重大项目(批准号:  20070402, 20060504)、教育部科学技术研究重点项目(批准号:  207026)、长春市科技计划项目(批准号:  2007045)和吉林省教育厅“十一五”科学技术研究项目(批准号:  2007-45,  2005109)资助.

Electrospinning Fabrication and Photocatalytic Properties of LaCrO4 and LaCrO3 Nanobelts

SUN Xia,  DONG Xiang-Ting*,  WANG Jin-Xian,  LIU Gui-Xia   

  1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2010-12-13 Revised:2011-09-09 Online:2011-10-10 Published:2011-09-11
  • Contact: DONG Xiang-Ting E-mail:dongxiangting888@yahoo.com.cn
  • Supported by:

    国家自然科学基金(批准号:   50972020)、吉林省科技发展计划重大项目(批准号:  20070402, 20060504)、教育部科学技术研究重点项目(批准号:  207026)、长春市科技计划项目(批准号:  2007045)和吉林省教育厅“十一五”科学技术研究项目(批准号:  2007-45,  2005109)资助.

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被引次数

20

摘要： 采用溶胶-凝胶法结合静电纺丝技术制备了PVP/[La(NO3)3|Cr(NO3)3]复合纳米带, 经热处理后得到LaCrO4纳米带和LaCrO3纳米带.  采用TG-DTA, XRD, SEM和EDS等测试手段对样品进行了表征.  结果表明, PVP/[La(NO3)3-Cr(NO3)3]复合纳米带表面光滑, 宽度为(9.1±1.9) μm, 厚度约385 nm; 经600  ℃焙烧后得到单斜独居石型LaCrO4纳米带, 宽度为(2.5±0.5) μm, 厚度约100 nm; 当焙烧温度为650~800  ℃时得到LaCrO3多孔纳米带, 属正交晶系, Pbnm空间群, 经650  ℃焙烧后得到的LaCrO3纳米带呈多孔结构, 带宽为(2.4±0.5) μm, 厚度约90 nm; 经800  ℃焙烧后得到的LaCrO3纳米带部分破碎形成LaCrO3纳米粒子, LaCrO3纳米带宽度约(1.3±0.4) μm, 厚度约90 nm, LaCrO3纳米粒子粒径约80 nm.  以罗丹明B为目标降解物, 研究了不同焙烧温度下产物的光催化性能, 其中800  ℃焙烧后得到的样品在紫外光照射下对罗丹明B的降解效果最好, 光照200 min后罗丹明B的降解率为94.6%.

关键词: 静电纺丝, LaCrO4, LaCrO3, 纳米带, 光催化

Abstract: PVP/[La(NO3)3-Cr(NO3)3] composite nanobelts were fabricated via the combination of sol-gel method with electrospinning.  LaCrO4 nanobelts and LaCrO3 nanobelts were obtained by calcination of the relevant composite nanobelts at different temperature for 8 h.  The samples were characterized by thermogravimetric-differential thermal analysis(TG-DTA),  X-ray diffractometry(XRD),  scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS).  It was found that the surface of the composite nanobelts was smooth,  and the width and thickness were (9.1±1.9) μm and 385 nm,  respectively.  Monoclinic monazite LaCrO4 nanobelts were prepared when the composite nanobelts were calcined at 600  ℃.  The width of LaCrO4 nanobelts was (2.5±0.5) μm,  and the thickness was ca. 100 nm.  Orthorhombic LaCrO3 porous nanobelts with space group Pbnm were formed by calcination of PVP/[La(NO3)3-Cr(NO3)3] composite nanobelts at 650—800  ℃.  The width and thickness of LaCrO3 nanobelts obtained by calcination of composite nanobelts at 650  ℃ were (2.4±0.5) μm and 90 nm,  respectively.  Some of LaCrO3 nanobelts was broken into LaCrO.3 nanoparticles at 800  ℃.  The width of LaCrO3 nanobelts was (1.3±0.4) μm,  and the thickness was about 90 nm,  while the mean diameter of LaCrO3 nanoparticles was ca. 80 nm.  The photocatalytic activities of LaCrO4 nanobelts and LaCrO3 nanobelts were studied using rhodamine B as degradation agent.  In the presence of LaCrO3 nanobelts obtained at 800  ℃,  the best degradation result of rhodamine B was achieved by illumination of ultraviolet ray,  and the degradation rate of rhodamine B reached  94.6% after the reactive mixture was illuminated for 200 min.

Key words: Electrospinning, LaCrO4, LaCrO3, Nanobelt, Photocatalysis

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