Title of Paper:Formation Mechanism of Zinc Oxalate Particles in the Internal Aqueous Droplets of Emulsion Liquid Membrane

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Date of Publication:2014-10-01

Journal:JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

Included Journals:SCIE、EI

Volume:35

Issue:10

Page Number:1369-1377

ISSN No.:0193-2691

Key Words:aggregation mechanism; emulsion liquid membrane; heterojunction; surfactant adsorption; zinc oxide

Abstract:We have investigated the formation and evolution of zinc oxalate particles in internal aqueous droplets and their effects of emulsion interface properties. The formation of particles follows an aggregation-controlled mechanism that depends on the size of droplets and surfactant. The size of droplets determines the final shape of the particles by affecting the supersaturation ratio to form rod-like and sheet-like particles. The surfactant adsorbed on the particles changes the wettability, leading to the aggregation of the primary particles at the internal water-oil interface. Moreover, the adsorption can cause a higher level of impurity and defects in as-synthesized particles. This effect could be directly employed to fabricate heterojunction rectifier.