Colloids and Surfaces : A Physicochemical and Engineering Aspects

This paper highlights recent work on formulation and stability of nickel sulphate W/O microemulsionusing hydrophilic nonionic surfactant Tween 80, and its use for electrodeposition of uniform Ni-nanoparticles on nickel plating. The prepared microemulsion was found to be crystal clear and very stable for more than 30 days at a wide range of temperature (20 ≥ T ≤ 45 ◦C). The Tween 80/n-hexane/nhexanol/ water microemulsion was used for fabrication of nickel nanoparticles modified nickel electrode. These electrodeposited Ni-nanoparticles were characterized by SEM, which revealed that uniform spherical nanoparticles of diameter 100–160 nm were deposited on electrode surface. The Ni-nanoelectrode was applied for electrooxidation of alcohols. The catalytic efficiency of Ni-nanoelectrode was far better than bulk electrode due to its high surface area.

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