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The structural evolution of hollow boehmite particles induced by citric acid
Han, Qiang1,2; Wu, Xiaofeng1; Liao, Yuchao1,2; Li, Dan1,2; Yue, Renliang1; Liu, Haidi1; Chen, Yunfa1
2013-03-01
Source PublicationMATERIALS LETTERS
Volume95Issue:0Pages:9-12
AbstractSpherical boehmite particles with hollow interiors were synthesized in the hydrothermal condition using aluminum nitrate as Al3+ source, urea as precipitator and citric acid as structure directing agent, which was further transformed to hollow gamma-Al2O3 products after simply heating post-treatment under 700 degrees C for 4 h. The crystal phase, morphologies and microstructure of the sample were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. It is suggested that the as-synthesized boehmite powder possesses hollow interior with ca.1 mu m in diameter and shells with 100 nm in thickness, and the calcinated sample have gamma crystal phase without morphological changes after heat post-treatment. The interesting hollow structure evolution was further investigated by comparative experiments and a reasonable evolution mechanism was proposed, in which the chelation of citric acid with Al3+ species and the dissolution of boehmite play the critical role in forming the hollow structure of boehmite. (C) 2012 Elsevier B.V. All rights reserved.
KeywordStructural Boehmite Nanoparticles Microstructure Citric Acid Surfaces
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordSUPPORTED METAL-CLUSTERS ; HYDROTHERMAL SYNTHESIS ; ALUMINA
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000316509700003
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13701
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Han, Qiang,Wu, Xiaofeng,Liao, Yuchao,et al. The structural evolution of hollow boehmite particles induced by citric acid[J]. MATERIALS LETTERS,2013,95(0):9-12.
APA Han, Qiang.,Wu, Xiaofeng.,Liao, Yuchao.,Li, Dan.,Yue, Renliang.,...&Chen, Yunfa.(2013).The structural evolution of hollow boehmite particles induced by citric acid.MATERIALS LETTERS,95(0),9-12.
MLA Han, Qiang,et al."The structural evolution of hollow boehmite particles induced by citric acid".MATERIALS LETTERS 95.0(2013):9-12.
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