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Preparation of Calcined kaolinite/TiO2 composites by titanyl sulfate (TiOSO4) hydrolysis precipitation.

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Title: Preparation of Calcined kaolinite/TiO2 composites by titanyl sulfate (TiOSO4) hydrolysis precipitation.
Authors: Lin, Minghao1 (AUTHOR), Wang, Gangan1 (AUTHOR), Li, Junqi1,2 (AUTHOR) jqli@gzu.edu.cn, Chen, Chaoyi1 (AUTHOR), Lan, Yuanpei1 (AUTHOR)
Source: Journal of Molecular Structure. Jul2025, Vol. 1335, pN.PAG-N.PAG. 1p.
Subjects: Phase transitions, Titanium dioxide, Chemical stability, Pollution, Energy consumption
Abstract: • Finely controlling the hydrolysis conditions enables efficient deposition of TiO 2 on the CK surface. Reduce the production cost of TiO 2 , reduce environmental pollution and energy consumption. • Clarify the important role of the surface active sites of the matrix material in chemical coating. • The composite material exhibits good pigment properties. Calcined kaolinite (CK)/TiO 2 composites were synthesized through hydrolysis precipitation of titanyl sulfate (TiOSO 4) and calcination. Under optimized hydrolysis conditions (pH 2.5, duration 2.0 h, temperature 90 °C, and mass ratio (TiO 2 /CK) = 1.0), a precipitation efficiency of 81.4 % was achieved. The phase composition remained consistent under varying hydrolysis conditions after significant TiO 2 formation. Furthermore, the oil absorption (mass ratio = 2.0) and hiding power (mass ratio = 1.4) of the composites were determined to be 38.8 g/100 g and 88.4 %, respectively. The composites exhibited high good chemical stability as a pigment, maintaining resistance to strong acid erosion, with only 4.0 % dissolution observed after a 15-day immersion in a pH 2.0 solution. H 2 TiO 3 underwent the dehydration and desulfurization more rapidly in an oxygen-rich environment, and anatase formation was well-developed at a calcination temperature of 750 °C for 1 h. Further analysis revealed that phase transition process of TiO 2 was influenced by TiO 2 content, disordered structure of CK and calcination conditions. TiO 2 particles formed single- or multi-layered chemical coatings on the active CK surface, although the presence of exposed mullite impeded coating formation. This study successfully developed cost-effective CK/TiO 2 composites with favorable pigment properties, providing a certain reference for CK selection. The composites have potential applications in coatings, pigments and related fields. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Journal of Molecular Structure is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 184601225
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Preparation of Calcined kaolinite/TiO2 composites by titanyl sulfate (TiOSO4) hydrolysis precipitation.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Minghao%22">Lin, Minghao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Gangan%22">Wang, Gangan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Junqi%22">Li, Junqi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jqli@gzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chaoyi%22">Chen, Chaoyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lan%2C+Yuanpei%22">Lan, Yuanpei</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Molecular+Structure%22">Journal of Molecular Structure</searchLink>. Jul2025, Vol. 1335, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br /><searchLink fieldCode="DE" term="%22Pollution%22">Pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Finely controlling the hydrolysis conditions enables efficient deposition of TiO 2 on the CK surface. Reduce the production cost of TiO 2 , reduce environmental pollution and energy consumption. • Clarify the important role of the surface active sites of the matrix material in chemical coating. • The composite material exhibits good pigment properties. Calcined kaolinite (CK)/TiO 2 composites were synthesized through hydrolysis precipitation of titanyl sulfate (TiOSO 4) and calcination. Under optimized hydrolysis conditions (pH 2.5, duration 2.0 h, temperature 90 °C, and mass ratio (TiO 2 /CK) = 1.0), a precipitation efficiency of 81.4 % was achieved. The phase composition remained consistent under varying hydrolysis conditions after significant TiO 2 formation. Furthermore, the oil absorption (mass ratio = 2.0) and hiding power (mass ratio = 1.4) of the composites were determined to be 38.8 g/100 g and 88.4 %, respectively. The composites exhibited high good chemical stability as a pigment, maintaining resistance to strong acid erosion, with only 4.0 % dissolution observed after a 15-day immersion in a pH 2.0 solution. H 2 TiO 3 underwent the dehydration and desulfurization more rapidly in an oxygen-rich environment, and anatase formation was well-developed at a calcination temperature of 750 °C for 1 h. Further analysis revealed that phase transition process of TiO 2 was influenced by TiO 2 content, disordered structure of CK and calcination conditions. TiO 2 particles formed single- or multi-layered chemical coatings on the active CK surface, although the presence of exposed mullite impeded coating formation. This study successfully developed cost-effective CK/TiO 2 composites with favorable pigment properties, providing a certain reference for CK selection. The composites have potential applications in coatings, pigments and related fields. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Molecular Structure is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.molstruc.2025.141989
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Titanium dioxide
        Type: general
      – SubjectFull: Chemical stability
        Type: general
      – SubjectFull: Pollution
        Type: general
      – SubjectFull: Energy consumption
        Type: general
    Titles:
      – TitleFull: Preparation of Calcined kaolinite/TiO2 composites by titanyl sulfate (TiOSO4) hydrolysis precipitation.
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            NameFull: Lin, Minghao
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            NameFull: Wang, Gangan
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            NameFull: Li, Junqi
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            NameFull: Chen, Chaoyi
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            NameFull: Lan, Yuanpei
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            – D: 15
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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              Value: 1335
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