Facile synthesis of flake-like dihydrate zinc oxalate particles
Monodispersed dihydrated zinc oxalate (ZnC2O4·2H2O) particles with characteristic morphology were synthesized by aging a mixed solution of zinc nitrate (Zn(NO3)2) and sodium oxalate (Na2C2O4) in the presence of a citrate ligand, with an average flat size of approximately 10–15 μm. The important parameters, including the solution pH values and the concentration of the zinc ions and citrate ligand, were investigated using a series of experiments. It is verified that the citrate ligand significantly affects the morphology of zinc oxalate particles, probably via its multiple roles of chelating, dispersing, and selective absorption. Thermodynamic equilibrium of the distribution of zinc species in an aqueous solution of Zn(II)-citrate-oxalate-H2O was estimated to explain the experimental results and to clarify the size and morphological evolution mechanism of the precipitated particles.
Keywordsfacile synthesis zinc oxalate flaky morphology citrate ligand one-pot synthesis
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The authors want to thank Dr. Li from the China Academic Institute of Automatics for his help during SEM observations.
- Q. Nie, L. Yang, C. Cao, Y.M. Zeng, G.Z. Wang, C.Z. Wang, and S.W. Lin, Interface optimization of ZnO nanorod/CdS quantum dots heterostructure by a facile two-step low-temperature thermal treatment for improved photoelectrochemical water splitting, Chem. Eng. J., 325(2017), p. 151.CrossRefGoogle Scholar
- S. Watanabe, S. Ohsaki, T. Hanafusa, K. Takada, H. Tanaka, K. Mae, and M.T. Miyahara, Synthesis of zeolitic imidazolate framework-8 particles of controlled sizes, shapes, and gate adsorption characteristics using a central collision-type microreactor, Chem. Eng. J., 313(2017), p. 724.CrossRefGoogle Scholar
- T. Wang, L.Y. Zhang, H.Y. Wang, W.C. Yang, Y.C. Fu, W.L. Zhou, W.T. Yu, K.S. Xiang, Z. Su, S. Dai, and L.Y. Chai, Controllable synthesis of hierarchical porous Fe3O4 particles mediated by poly(diallyldimethylammonium chloride) and their application in arsenic removal, ACS Appl. Mater. Interfaces, 5(2013), No. 23, p. 12449.CrossRefGoogle Scholar
- T. Tang and T.Z. Yang, Fundamental and Technology of Complex Metallurgy, Central South University Press, Changsha, 2011, p. 4.Google Scholar