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Citation: Zhou Xing-Fu, Han Ai-Jie, Chu Dao-Bao, Lin Chang-Jian, Tian Zhong-Qun. Preparation of Nanocrystalline NiO by Electrochemical Dissolution of Nickel[J]. Acta Physico-Chimica Sinica, ;2002, 18(07): 613-616. doi: 10.3866/PKU.WHXB20020709 shu

Preparation of Nanocrystalline NiO by Electrochemical Dissolution of Nickel

1.
College of Chemistry and Materials Science, Anhui Normal University, Wuhu　241000; 1State Key Laboratory for Physics Chemistry of Solid Surfaces, Xiamen University, Xiamen　361005

Received Date: 27 December 2001
Available Online: 15 July 2002

Metallic nickel was electrochemically dissolved in absolute ethanol and acetylacetone solution in the presence of Bu4NBr(as electronconductive additive). The electrolyte solution containing the precursor was then directly hydrolyzed to obtain nanocrystalline NiO. The precursor was characterized by FTIR、1HNMR、Raman spectra and the nanopowder was characterized by XRD and TEM. The results showed that the NiO powder after hydrolysis was amorphous but formed the cubic NaCl structure when calcined at 350 ℃,the NiO powder have a narrow size distribution of 5～10 nm after annealed at 600 ℃. Characterization of the electrochemical product revealed that Ni(OEt)2(acac)2 was formed by anode dissolution of nickel in ethanol and acetylacetone mixed solution. The experiments also showed that the precursor of the nanocrystalline NiO prepared by this method can be dissolved in ethanol solution when temperature increase to 40～50 ℃ region.
- Electrolysis;Nickel anode;Sol-gel;Nanocrystalline NiO;Raman spectrum
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