Fatimah Siti, Khoerunnisa Fitri, Ko Young Gun
Materials Electrochemistry Group, School of Materials Science and Engineering, Yeungnam University Gyeongsan 38541 Republic of Korea
Department of Chemistry, Indonesia University of Education Bandung 40154 Indonesia.
RSC Adv. 2018 Jul 27;8(47):26804-26816. doi: 10.1039/c8ra04708a. eCollection 2018 Jul 24.
In this study, we describe the green plasma electrolysis of a magnesium alloy in alkaline electrolyte to produce a hybrid inorganic layer with nickel (hydr)oxide incorporated in a matrix of magnesium oxide, and investigate the electrochemical and optical properties of this material. The addition of Ni(NO)·6HO to the electrolyte reduced the size of the micro-defects found in the inorganic layer after plasma electrolysis by inducing soft plasma discharges. As a result, through cyclic voltammetry and polarization tests, the corrosion stability of the sample containing nickel (hydr)oxide was significantly enhanced. Measurement of the optical properties reveals that the material possesses excellent energy efficiency as indicated by a high solar absorptivity of ∼0.92 and a low infrared emissivity of ∼0.13 which are presumably due to the inherent dark-brown colour of nickel (hydr)oxide. We expect that these results will have implications in the development of functional materials with excellent optical and corrosion properties by considering green processing utilizing alkaline electrolyte.
在本研究中，我们描述了在碱性电解液中对镁合金进行绿色等离子体电解，以制备一种混合无机层，该无机层在氧化镁基体中掺入了镍（氢）氧化物，并研究了该材料的电化学和光学性质。向电解液中添加Ni(NO)·6HO通过诱导软等离子体放电，减小了等离子体电解后在无机层中发现的微缺陷尺寸。结果，通过循环伏安法和极化测试，含镍（氢）氧化物样品的耐腐蚀稳定性显著提高。光学性质测量表明，该材料具有优异的能量效率，其太阳能吸收率约为0.92，红外发射率约为0.13，这可能归因于镍（氢）氧化物固有的深棕色。我们期望这些结果将对通过考虑利用碱性电解液的绿色工艺来开发具有优异光学和耐腐蚀性能的功能材料产生影响。
