A study of the catalytic behavior of phosphotungstic acid-modified Janus particles in a heterogeneous oil/water pickering emulsion system |
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| Affiliation: | 1. Liaoning Shihua University, Fushun, 113001, China;2. Administration Center of the Yellow River Delta Sustainable Development Institute of Shandong Province, Dongying, 257001, China;1. Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 Université de Poitiers - CNRS, 4 rue Michel Brunet, BP633, 86022, Poitiers Cedex, France;2. Solvay Research & Innovation Center of Lyon, 85 rue des Frères Perret, BP 62 69192, Saint Fons, France;1. Ministry of Education Key Laboratory of Enhanced Oil Recovery Technology, Northeast Petroleum University, Daqing 163318, China;2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130012, China;1. Key Laboratory of Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Mei Long Rd., Shanghai 200237, PR China;2. Eco-Efficient Products and Processes Laboratory (E2P2L), UMI 3464 CNRS – Solvay, 3066 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, PR China;3. Laboratoire de Chimie, UMR 5182 CNRS – Ecole Normale Supérieure de Lyon, 46 allée d’Italie, 69364 Lyon, France;1. School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong 255049, PR China;2. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, Shandong 255049, PR China |
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| Abstract: | An emulsion interface materialization method was used to obtain amphiphilic silica Janus nanoparticles. Reducing the photosynthesis of aquatic organisms after water pollution. PW12O403− was introduced onto Janus particles by ion exchange, and an amphiphilic particle emulsion catalyst (PWO-J) was prepared. Hydrogen peroxide was used as the oxygen source, and the amphiphilicty of the catalyst was used to assemble the catalyst at the Pickering emulsion interface. The PWO-J catalyst was found to exhibit very high catalytic activity toward the oxidation of oleic acid in water-in-oil systems. The results showed that PWO-J catalysis of oxidation had similar results as CTAB and phosphotungstic acid (control system) under the same conditions. The azelaic acid recovery rate was 86.7%, and PWO-J could be reused 4 times. A reaction mechanism was proposed, and the constructed model was used to calculate a reaction rate constant of 15.32 × 10−5L•mol−1•s−1 for the PWO-J system. The PWO-J system had a lower activation energy than the control system, showing that the catalytic oxidation of oleic acid into azelaic acid was more likely to occur in the PWO-J system. |
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| Keywords: | Janus particles Pickering emulsion Heterogeneous catalysis Isolation Recovery Aquatic organisms |
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