期刊
SOLID STATE SCIENCES
卷 83, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2018.07.001
关键词
Janus particles; Pickering emulsion; Heterogeneous catalysis; Isolation; Recovery; Aquatic organisms
资金
- Research Fund for the Foundation of Liaoning Education Committee [L2017LQN002]
- Liaoning BaiQianWan Talent Program
- Talent Scientific Research Fund of LSHU [2016XJJ-064]
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 x 10(-5) L.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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