以三聚氰胺-甲醛微球为模板制备均一氧化钆空心球

doi:10.11901/1005.3093.2016.454

材料研究学报

2017, Vol. 31

Issue (4): 285-290 DOI: 10.11901/1005.3093.2016.454

研究论文

本期目录 | 过刊浏览

以三聚氰胺-甲醛微球为模板制备均一氧化钆空心球

张弛, 孙刚, 欧阳文宜, 覃卉婷, 李栋辉, 姚楚, 江学良(

)

武汉工程大学材料科学与工程学院武汉 430074

Preparation of Uniform Hollow Spheres of Gd₂O₃ by Using Melamine-Formaldehyde Microspheres as Templates

Chi ZHANG, Gang SUN, Wenyi OUYANG, Huiting QIN, Donghui LI, Chu YAO, Xueliang JIANG(

)

School of Material Science and Engineering, Wuhan Institute of Technology,Wuhan 430074, China

引用本文:

张弛, 孙刚, 欧阳文宜, 覃卉婷, 李栋辉, 姚楚, 江学良. 以三聚氰胺-甲醛微球为模板制备均一氧化钆空心球[J]. 材料研究学报, 2017, 31(4): 285-290.
Chi ZHANG, Gang SUN, Wenyi OUYANG, Huiting QIN, Donghui LI, Chu YAO, Xueliang JIANG. Preparation of Uniform Hollow Spheres of Gd₂O₃ by Using Melamine-Formaldehyde Microspheres as Templates[J]. Chinese Journal of Materials Research, 2017, 31(4): 285-290.

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摘要:

以三聚氰胺和甲醛在水溶液中缩聚交联生成的单分散三聚氰胺-甲醛(MF)微球为模板,以尿素为沉淀剂,用均相沉淀法制备出核壳结构前驱体MF/Gd(OH)CO₃复合微球,煅烧除去模板后得到单分散氧化钆(Gd₂O₃)空心球。使用傅立叶红外光谱(FT-IR)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)、X射线衍射分析(XRD)、X射线能谱仪(XPS)、热重分析(TG)和差示扫描量热分析(DSC)等手段表征了Gd₂O₃空心球的形貌和结构组成。结果表明,将前驱体煅烧去除了MF模板,非晶态的Gd(OH)CO₃发生热分解反应生成了纯立方晶相的Gd₂O₃空心球,其粒径约为2.4 μm,壳层的厚度为120 nm。

关键词 ：无机非金属材料, 三聚氰胺-甲醛微球, 模板, 空心球, Gd₂O₃

Abstract：

Monodispersed microspheres of melamine-formaldehyde (MF) was fabricated by polycondensation crosslinking process with aqueous solution of melamine and formaldehyde as raw material. Then the core-shell structure precursor of composite microspheres MF/Gd(OH)CO₃ was prepared by a urea-based homogeneous precipitation technique with MF microspheres as templates. Finally hollow microspheres of Gd₂O₃ were obtained by calcination of the MF/Gd(OH)CO₃ to remove tempaltes. The morphology and structure of the hollow microspheres Gd₂O₃ were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractomater (XRD), X-ray energy dispersive spectroscopy (XPS), thermal gravimetric analysis (TG) and differential scanning calorimetry (DSC). The results show that the MF templates can be effectively removed and the amorphous precursor of composite microspheres MF/Gd(OH)CO₃ has converted to crystalline Gd₂O₃ during the annealing progress. The generated hollow spheres of Gd₂O₃ possess particle size of about 2.4 μm and shell thickness of 120 nm.

Key words： inorganic non-metallic materials melamine formaldehyde template hollow spheres gadolinium oxide

收稿日期: 2016-08-01

ZTFLH:

TB383

基金资助:国家自然科学基金(51273154), 武汉工程大学大学生校长基金(CX2015085)和武汉工程大学研究生教育创新基金(CX2016003)

作者简介:

作者简介张弛,男,1993年生,本科生

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.454 或 https://www.cjmr.org/CN/Y2017/V31/I4/285

图1 MF模板、MF/Gd(OH)CO3复合微球以及Gd2O3空心球样品的FT-IR光谱图

图2 MF模板、MF/Gd(OH)CO3复合微球以及Gd2O3空心球样品的TG曲线

图3 MF/Gd(OH)CO3复合微球的DSC曲线

图4 MF/Gd(OH)CO3复合微球和Gd2O3空心球样品的XRD图

图5 Gd2O3空心球的XPS全谱和Gd 4d谱

图6 MF模板、MF/Gd(OH)CO3复合微球以及Gd2O3空心球样品的SEM图

图7 MF/Gd(OH)CO3复合微球和Gd2O3空心球样品的TEM图

图8 Gd2O3空心球的制备流程图

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