CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Hydrous alumina/silica double-layer surface coating of TiO2 pigment
Li, Jie1,2; Liu, Yahui1,2; Wang, Yong1,2,3; Wang, Weijing1,2; Wang, Dong1,2; Qi, Tao1,2; Qi, T
2012-08-05
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume407Issue:0Pages:77-84
AbstractThe hydrous alumina/silica double-layer surface coating of TiO2 pigment was prepared by precipitation method under two different conditions. High-resolution transmission electron microscopy (HRTEM), Energy dispersive spectrometer (EDS). X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectrum (FTIR) as well as zeta-potential analysis were used to characterize the morphology, structure and surface electrokinetic behavior, respectively. The results show that hydrous alumina is continuously coated on the surface of silica-coated TiO2 particle with a compact layer at 60 degrees C, pH 4.0. There is a chemical interaction between the hydrous alumina layer and silica layer. An Al-O-Si bond was formed and a thin film of aluminosilicate was existed. A flocculent hydrous alumina layer was formed at 60 degrees C, pH 8.0. The XPS spectra of Ols show that the peak of 531.2 eV is assigned to AlO(OH) for the loose and flocculent morphology. The theoretical calculations reveal that the coated Al2O3 center dot H2O on Si-O layer combined with (-111) lattice plant of rutile TiO2 is more stable than the coated AlO(OH) and the discrepancy of total energy between them is about -1.303 eV, i.e., the sample obtained at 60 degrees C. pH 4.0 has a more stable thermodynamic property. In addition, the adsorption of H+ ion on AlO(OH) surface is easier than that on Al2O3 center dot H2O surface, as the discrepancy of total energy between them decrease to -0.721 eV. (c) 2012 Elsevier B.V. All rights reserved.
KeywordSurface Coating Double-layer Hydrous Alumina (-111) Facets Tio2 Pigment
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2012.05.010
Indexed BySCI
Language英语
WOS KeywordPARTICLES ; PRECIPITATION ; MORPHOLOGY ; MOLECULES ; EXCHANGE
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000306890200011
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/3230
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorQi, T
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Hebei Univ Sci & Technol, Dept Pharmaceut & Chem Engn, Shi Jiazhang 050031, Peoples R China
Recommended Citation
GB/T 7714
Li, Jie,Liu, Yahui,Wang, Yong,et al. Hydrous alumina/silica double-layer surface coating of TiO2 pigment[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2012,407(0):77-84.
APA Li, Jie.,Liu, Yahui.,Wang, Yong.,Wang, Weijing.,Wang, Dong.,...&Qi, T.(2012).Hydrous alumina/silica double-layer surface coating of TiO2 pigment.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,407(0),77-84.
MLA Li, Jie,et al."Hydrous alumina/silica double-layer surface coating of TiO2 pigment".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 407.0(2012):77-84.
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