Synthesis, characterization and electrochemical performance of cobalt fluoride nanoparticles by reverse micro-emulsion method

Abstract In this work, the cobalt fluoride (CoF2) nanoparticles (NPs) were prepared by reverse micro-emulsion method for first time using cetyltrimethylammonium bromide as surfactant and 2-octanol and water as solvents. Two types of hydrated and sintered CoF2 NPs were prepared with different ratio by changing water to surfactant ratio while keeping the temperature constant at 22 °C. The hydrated CoF2 NPs were sintered at 400 °C under inert atmosphere at 5.0 millibar pressure for 3 h in vacuum chamber in order to obtain sintered CoF2 NPs. The particle sizes of the as-prepared NPs were found to be ~20–70 nm. As-prepared hydrated and sintered CoF2 NPs were characterized by Energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, Scanning electron microscopy, UV–Vis spectroscopy, thermogravimetric analysis, and X-ray diffraction. Further, cyclic voltammetry has been used to measure the electrochemical performance of as-prepared NPs and the results show that electrochemical performance i.e. reversibility and cyclic stability of the synthesized NPs are highly improved. The sintered CoF2 NPs (~20–50 nm) obtained at ratio 2:2.5 with uniform composition show better electrochemical performances (0.079 mA g−1) as compared to its counterparts. This study reveals that CoF2 NPs has great potential as cathode material in energy storage devices due to its excellent efficiency, low cost, easy synthesis and high yield.

[1]  Nathalie Pereira,et al.  Carbon-Metal Fluoride Nanocomposites Structure and Electrochemistry of FeF3: C , 2003 .

[2]  L. Motte,et al.  Synthesis in situ of nanosize silver sulphide semiconductor particles in reverse micelles , 1996 .

[3]  M. Guo,et al.  Electrochemical performance and morphological evolution of hollow Sn microspheres , 2018, Solid State Ionics.

[4]  S. A. Gómez-Lopera,et al.  Stability of Dispersions of Colloidal Nickel Ferrite Spheres , 2001 .

[5]  M. Salavati‐Niasari,et al.  Removal of malachite green (a toxic dye) from water by cobalt ferrite silica magnetic nanocomposite: Herbal and green sol-gel autocombustion synthesis , 2017 .

[6]  R. G. Wheeler,et al.  Photoionization dynamics and abundance patterns in laser vaporized tin and lead clusters , 1987 .

[7]  R. Najjar.  Microemulsions - An Introduction to Properties and Applications , 2012 .

[8]  M. Salavati‐Niasari,et al.  Praseodymium oxide nanostructures: novel solvent-less preparation, characterization and investigation of their optical and photocatalytic properties , 2015 .

[9]  M. Salavati‐Niasari,et al.  Synthesis and in vitro evaluation of a novel magnetic drug delivery system; proecological method for the preparation of CoFe2O4 nanostructures , 2018 .

[10]  M. Morse.  Clusters of transition-metal atoms , 1986 .

[11]  M. Kagawa,et al.  Preparation of Ultrafine MgO by the Spray‐ICP Technique , 1981 .

[12]  A. Iqbal,et al.  Influence of Mn-doping on the photocatalytic and solar cell efficiency of CuO nanowires , 2017 .

[13]  Yuehuan Li,et al.  Effect of Sn doping on the electrochemical performance of NaTi2(PO4)3/C composite , 2018, Ceramics International.

[14]  M. Salavati‐Niasari,et al.  Modified single-phase hematite nanoparticles via a facile approach for large-scale synthesis , 2011 .

[15]  X. Q. Wei,et al.  Temperature dependence of Ni 3 S 2 nanostructures with high electrochemical performance , 2018 .

[16]  Junfeng Ding,et al.  Investigation of the conversion mechanism of nanosized CoF2 , 2013 .

[17]  Shuyi Qin,et al.  Rational construction of bowl-like MnO2 nanosheets with excellent electrochemical performance for supercapacitor electrodes , 2018, Chemical Engineering Journal.

[18]  E. Elahi,et al.  Agricultural advisory and financial services; farm level access, outreach and impact in a mixed cropping district of Punjab, Pakistan , 2018 .

[19]  J. Boilot,et al.  Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors , 2000 .

[20]  X. Bai,et al.  Preparation and electrochemical performance of F-doped Li4Ti5O12 for use in the lithium-ion batteries , 2018, Solid State Ionics.

[21]  M. Bawendi,et al.  Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites , 1993 .

[22]  Hui‐Ming Cheng,et al.  Highly stable graphene-oxide-based membranes with superior permeability , 2018, Nature Communications.

[23]  Xiaodong Li,et al.  Needle-like Co3O4 anchored on the graphene with enhanced electrochemical performance for aqueous supercapacitors. , 2014, ACS applied materials & interfaces.

[24]  M. Salavati‐Niasari,et al.  Synthesis and characterization of ZnO nanocrystals from thermolysis of new precursor , 2009 .

[25]  S. Feng,et al.  Sol-Hydrothermal Synthesis and Hydrothermally Structural Evolution of Nanocrystal Titanium Dioxide , 2002 .

[26]  Hui‐Ming Cheng,et al.  Reduced graphene oxide/metal oxide nanoparticles composite membranes for highly efficient molecular separation , 2018, Journal of Materials Science & Technology.

[27]  M. Salavati‐Niasari,et al.  Synthesis and characterization of ZnS nanoclusters via hydrothermal processing from [bis(salicylidene)zinc(II)] , 2009 .

[28]  Justin D. Holmes,et al.  Supercritical-fluid synthesis of FeF2 and CoF2 Li-ion conversion materials , 2013 .

[29]  E. Elahi,et al.  Domestic water buffaloes: Access to surface water, disease prevalence and associated economic losses. , 2018, Preventive veterinary medicine.

[30]  Byers,et al.  Sol-Gel and Ultrafine Particle Formation via Dielectric Tuning of Inorganic Salt-Alcohol-Water Solutions. , 2000, Journal of colloid and interface science.

[31]  E. E. Carpenter,et al.  Synthesis and reactivity of nanophase ferrites in reverse micellar solutions , 1999 .

[32]  Jackie Y. Ying,et al.  Sol−Gel Synthesis and Hydrothermal Processing of Anatase and Rutile Titania Nanocrystals , 1999 .

[33]  Baris Key,et al.  Identifying the local structures formed during lithiation of the conversion material, iron fluoride, in a Li ion battery: a solid-state NMR, X-ray diffraction, and pair distribution function analysis study. , 2009, Journal of the American Chemical Society.

[34]  M. Salavati‐Niasari,et al.  Microwave-assisted synthesis and photovoltaic measurements of CuInS2 nanoparticles prepared by using metal–organic precursors , 2012 .

[35]  Ahmad Akbari,et al.  Caffeine: A novel green precursor for synthesis of magnetic CoFe2O4 nanoparticles and pH-sensitive magnetic alginate beads for drug delivery. , 2017, Materials science & engineering. C, Materials for biological applications.

[36]  T. Hirai,et al.  Preparation of Gd2O3 : Eu3+ and Gd2O2S : Eu3+ Phosphor Fine Particles Using an Emulsion Liquid Membrane System , 2002 .

[37]  M. Salavati‐Niasari,et al.  Magnetic nickel ferrite nanoparticles: Green synthesis by Urtica and therapeutic effect of frequency magnetic field on creating cytotoxic response in neural cell lines. , 2018, Colloids and surfaces. B, Biointerfaces.

[38]  Clifford R. Pollock,et al.  Synthesis and Fluorescence of Neodymium-Doped Barium Fluoride Nanoparticles , 2000 .

[39]  M. Salavati‐Niasari,et al.  A magnetic CoFe2O4/SiO2 nanocomposite fabricated by the sol-gel method for electrocatalytic oxidation and determination of L-cysteine , 2017, Microchimica Acta.

[40]  Xiaodong Li,et al.  Porous CoF2 Spheres Synthesized by a One‐Pot Solvothermal Method as High Capacity Cathode Materials for Lithium‐Ion Batteries , 2017 .

[41]  Yadong Li,et al.  A Solvothermal Elemental Reaction To Produce Nanocrystalline ZnSe , 1998 .