Corrosion-Resistant Polymer-Derived SiOC Membrane for Effective Organic Removal via Synergistic Adsorption and Peroxymonosulfate Activation
Jiankun Ji, Yarong Gu, Jianning Zhang, Chongwen Yu, Xiao Hu, Yueping Bao, Yujie Song
Corrosion-Resistant Polymer-Derived SiOC Membrane for Effective Organic Removal via Synergistic Adsorption and Peroxymonosulfate Activation
A major challenge is to construct ceramic membranes with tunable structures and functions for water treatment. Herein, a novel corrosion-resistant polymer-derived silicon oxycarbide (SiOC) ceramic membrane with designed architectures was fabricated by a phase separation method and was applied in organic removal via adsorption and oxidation for the first time. The pore structure of the as-prepared SiOC ceramic membranes was well controlled by changing the sintering temperature and polydimethylsiloxane content, leading to a pore size of 0.84–1.62 μm and porosity of 25.0–43.8%. Corrosion resistance test results showed that the SiOC membranes sustained minimal damage during 24 h exposure to high-intensity acid–base conditions, which could be attributed to the chemical inertness of SiOC. With rhodamine 6G (R6G) as the model pollutant, the SiOC membrane demonstrated an initial effective removal rate of 99% via adsorption; however, the removal rate decreased as the system approached adsorption saturation. When peroxymonosulfate was added into the system, efficient and continuous degradation of R6G was observed throughout the entire period, indicating the potential of the as-prepared SiOC membrane in oxidation-related processes. Thus, this work provides new insights into the construction of novel polymer-derived ceramic membranes with well-defined structures and functions.
Polymer-derived ceramics / Membrane / Corrosion resistance / Adsorption / Oxidation
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