Effective parameter study for the facile and controlled growth of silver molybdate nano/micro rods

doi:10.1007/s11706-016-0360-x

Front. Mater. Sci.

2016, Vol. 10

Issue (4) : 375-384 https://doi.org/10.1007/s11706-016-0360-x

RESEARCH ARTICLE

Effective parameter study for the facile and controlled growth of silver molybdate nano/micro rods

Javier Esteban Enríquez MONTENEGRO and Dinesh Pratap SINGH(

)

Department of Physics, University of Santiago, Chile, Avenida Ecuador 3493, Estacion Central, Santiago 9170124, Chile

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Abstract

Controlled growth of nano/micro structures by controlling the effective parameters is the basic requirement for the application point of view in various areas. Here we report the facile growth of silver molybdate nano/micro rods by mixing the solution of silver nitrate and ammonium molybdate at ambient condition followed by hydrothermal treatment at various temperatures for 12 h. To achieve the goal for the synthesis of long, high yield and homogeneous nanorods various effective parameters have been studied to set the most effective conditions for the growth. Among possible effective parameters first the temperature of the furnace was set by warring the temperature and then at the set temperature the concentration of reactants (NH₄)₆Mo₇O₂₄ and silver nitrate are varied respect to each other. The pH and temperature values were monitored during the mixing of the reactants. Structural/microstructural characterization revealed the optimum condition of 150°C of the furnace and the concentration of (NH₄)₆Mo₇O₂₄ and silver nitrate as described in various tables.

Keywords silver molybdate nanorod Ag₆Mo₁₀O₃₃ controlled growth silver nitrate

Corresponding Author(s): Javier Esteban Enríquez MONTENEGRO and Dinesh Pratap SINGH

Online First Date: 14 November 2016 Issue Date: 24 November 2016

Cite this article:

Javier Esteban Enríquez MONTENEGRO and Dinesh Pratap SINGH. Effective parameter study for the facile and controlled growth of silver molybdate nano/micro rods[J]. Front. Mater. Sci., 2016, 10(4): 375-384.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-016-0360-x
https://academic.hep.com.cn/foms/EN/Y2016/V10/I4/375

Fig.1 Table represents various samples synthesized at different conditions and their corresponding optical images. The constant conditions in all cases are: c(AgNO₃) = 0.025 mol/L (15 mL); c((NH₄)₆Mo₇O₂₄) = 0.075 mol/L (15 mL); time in the furnace, t = 12 h. (a) Curves of pH vs. time for different samples during the mixing. (b) Curves of temperature vs. time for different samples during mixing of the reactants.

Fig.2 SEM images of as-obtained materials after hydrothermal treatment at (a)(b) RT, (c)(d) 50°C, (e)(f) 100°C, (g)(h) 150°C and (i)(j) 200°C. Corresponding sample names are also indicated in the low- and high-magnified images.

Fig.3 Table represents the variation of the molar concentration of AgNO₃ with respect to the constant concentration of (NH₄)₆Mo₇O₂₄ (0.075 mol/L) and their corresponding optical images. (a) Curves of pH vs. time for different samples during the mixing. (b) Curves of temperature vs. time for different samples during mixing of the reactants.

Fig.4 SEM images of as-synthesized materials at various molar concentrations of AgNO₃ of (a)(b) 0.025 mol/L, (c)(d) 0.050 mol/L and (e)(f) 0.100 mol/L keeping the (NH₄)₆Mo₇O₂₄ concentration constant as 0.075 mol/L. Corresponding sample names are also indicated in the low- and high-magnified images.

Fig.5 The table represents the variation of the molar concentration of (NH₄)₆Mo₇O₂₄ with respect to the constant concentration of AgNO₃ (0.075 mol/L) and their corresponding optical images. (a) Curves of pH vs. time for different samples during the mixing. (b) Curves of temperature vs. time for different samples during mixing of the reactants.

Fig.6 SEM images of as-synthesized materials at various molar concentrations for (NH₄)₆Mo₇O₂₄ of (a)(b) 0.025 mol/L, (c)(d) 0.050 mol/L and (e)(f) 0.100 mol/L, keeping the AgNO₃ concentration constant as 0.075 mol/L. Corresponding sample names are also indicated in the low- and high-magnified images.

Fig.7 Table represents the variation of the molar concentration of AgNO₃ with respect to the constant concentration of (NH₄)₆Mo₇O₂₄ (0.025 mol/L) and their corresponding optical images. (a) Curves of pH vs. time for different samples during the mixing. (b) Curves of temperature vs. time for different samples during the mixing of the reactants.

Fig.8 SEM images of as-synthesized materials at various molar concentrations for AgNO₃ of (a)(b) 0.025 mol/L, (c)(d) 0.050 mol/L and (e)(f) 0.100 mol/L, keeping the (NH₄)₆Mo₇O₂₄ concentration constant as 0.025 mol/L. Corresponding sample names are also indicated in the low- and high-magnified images.

Fig.9 XRD patterns of the best samples as obtained in each set of experiments described by bold letters in various tables: (a) SM240314; (b) SM310314; (c) SM280714; (d) SM050814.

Fig.10 The schematic growth mechanism and effective parameter dependency for the growth of long and high yield nanowires/microwires.

Fig.11 The magnetic behaviors of the synthesized best samples: (a) SM240314; (b) SM310314; (c) SM280714; (d) SM050814.

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