Optimization of synthesis procedure and structure characterization of manganese tungstate nanoplates

Mehdi Rahimi-Nasrabadi 1 , S. Pourmortazavi 2 , Morteza Khalilian-Shalamzari 1 , S. Hajimirsadeghi 3 , and M. Zahedi 3
  • 1 Department of Chemistry, Imam Hossein University, P.O. Box 16575-347, Tehran, Iran
  • 2 Faculty of Material and Manufacturing Technologies, Malek Ashtar University of Technology, P.O. Box 16765-3454, Tehran, Iran
  • 3 Varamin Pishva Branch, Islamic Azad University, 33817-7489, Varamin, Iran

Abstract

A simple and fast chemical method was used for synthesis of manganese tungstate nanoplates in flower-like clusters; while Taguchi robust design was employed as statistical method for optimization of the experimental parameters for the procedure. Ultrafine manganese tungstate plates in flower-like clusters were synthesized via a direct precipitation method involving addition of manganese ion solution to the aqueous tungstate reagent. Effects of various reaction conditions such as manganese and tungstate concentrations, flow rate of reagent addition and reactor temperature on the thickness of the synthesized manganese tungstate plates were investigated experimentally. Analysis of variance (ANOVA) showed that manganese tungstate nanoplates could be effectively synthesized by tuning significant parameters of precipitation procedure. Meanwhile, optimum conditions for synthesis of MnWO4 nanoplates via this simple, fast, and cost effective method were proposed. The structure and composition of the prepared nanoplates under optimum conditions were characterized by EDX, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), FT-IR spectroscopy, and photoluminescence techniques.

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