Corrosion Resistance of ZrO2 Nanofiltration Membranes
Abstract:A stable ZrO2 polymeric sol was synthesized through a sol–gel method using zirconium n-propoxide as precursor. Disk α-Al2O3 supported mesoporous -Al2O3 membrane with an average pore size of 5–6 nm was used as support for nanofiltration membranes deposition. Defect-free ZrO2 nanofiltration membranes superimposed on these supports were fabricated via dip-coating method followed by drying and calcination. The chemical stabilities of supported ZrO2 nanofiltration membranes were detemined by static corrosion tests. Results showed that unsupported ZrO2 membranes calcined at 350 and 400 were found to be chemically stable in a pH window of 1–13. Supported ZrO2 nanofiltration membrane calcined at 400 was found to be chemically stable in a window of pH = 2–12. While the membrane calcined at 350 showed reduced PEG-rentention properties after immersed in pH = 12 and 2 solutions. The result can be attributed to the amorphous phase presented in zirconia separation layer as well as the chemical instability of the γ-Al2O2 layer beneath.
Document Type: Research Article
Affiliations: State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
Publication date: 2013-12-01
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- Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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