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Journal of Dispersion Science and Technology Volume 40, 2019 - Issue 3
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Original Articles

Role of ammonium ions on the stability of TiO2 sol

Jun ZhangDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
,
Peng JiangDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
,
Peng SunDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
,
Qi WangDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
,
Jianlei KuangDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
,
Wenxiu LiuDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaView further author information
&
Wen-Bin CaoDepartment of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology, Beijing, PR ChinaCorrespondence[email protected]
View further author information
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Pages 425-430 | Received 11 Oct 2017, Accepted 28 Apr 2018, Published online: 08 Oct 2018
 
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Abstract

In this paper, the role of the trace ammonium ions on the stability of TiO2 sol prepared by peroxo titanic acid (PTA) sol was investigated. The results showed that the removal of ammonium ions in PTA sol is beneficial to reduce agglomeration and increase the negative charge on the surface of TiO2 colloidal particles, contributing to the higher stability and longer storage time of the TiO2 sol. It was also approved by the increase of interaction energy calculated by classical DLVO theory. In addition, the photocatalytic performance of TiO2 sol was improved due to the decrease of aggregation of TiO2 colloidal particles.

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Additional information

Funding

This work is supported by the China National Key Research & Development Plan [Grant Nos. 2016YFC0700901, 2016YFC0700607] and China Postdoctoral Science Foundation [Grant Nos. 2016M600917].

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