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Seied Mahdi Pourmortazavi - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical synthesis and characterization of Zinc Carbonate and Zinc oxide nanoparticles
Journal of Molecular Structure, 2015Co-Authors: Seied Mahdi Pourmortazavi, Zahra Marashianpour, Meisam Sadeghpour Karimi, Mohammad Mohammad-zadehAbstract:Abstract Zinc oxide and its precursor i.e., Zinc Carbonate is widely utilized in various fields of industry, especially in solar energy conversion, optical, and inorganic pigments. In this work, a facile and clean electrodeposition method was utilized for the synthesis of Zinc Carbonate nanoparticles. Also, Zinc oxide nanoparticles were produced by calcination of the prepared Zinc Carbonate powder. Zinc Carbonate nanoparticles with different sizes were electrodeposited by electrolysis of a Zinc plate as anode in the solution of sodium Carbonate. It was found that the particle size of Zinc Carbonate might be tuned by process parameters, i.e., electrolysis voltage, Carbonate ion concentration, solvent composition and stirring rate of the electrolyte solution. An orthogonal array design was utilized to identify the optimum experimental conditions. The experimental results showed that the minimum size of the electrodeposited ZnCO 3 particles is about 24 nm whereas the maximum particle size is around 40 nm. The TG-DSC studies of the nanoparticles indicated that the main thermal degradation of ZnCO 3 occurs in two steps over the temperature ranges of 150–250 and 350–400 °C. The electrosynthesized ZnCO 3 nanoparticles were calcined at the temperature of 600 °C to prepare ZnO nanoparticles. The prepared ZnCO 3 and ZnO nanoparticles were characterized by SEM, X-ray diffraction (XRD), and FT-IR techniques.
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facile synthesis of Zinc Carbonate and Zinc oxide nanoparticles via direct carbonation and thermal decomposition
Ceramics International, 2013Co-Authors: Mojtaba Shamsipur, Mir Mahdi Zahedi, Seiedeh Somayyeh Hajimirsadeghi, Seied Mahdi Pourmortazavi, Mehdi RahiminasrabadiAbstract:Abstract Synthesis of ultrafine Zinc Carbonate and Zinc oxide powders using direct precipitation and thermal decomposition of the precursor was investigated. Nanoparticles of ZnCO3 were prepared by the direct precipitation method with Zn(NO3)2 and Na2CO3 as raw materials. The precipitation process as a popular, facile, controllable and cost-effective method was used to produce insoluble inorganic salts. Therefore, it was very important to improve capability and quality of the process for controlling the product particle size by setting the optimal precipitation reaction parameters. In this research, the parameter design of the Taguchi method was applied to set the optimal parameters of precipitation process for Zinc Carbonate nano-particle preparation. The reaction conditions such as Zinc and Carbonate ion concentrations, flow rate of reagent addition and reactor temperature were optimized by orthogonal array design, OA9. The effect of these factors on the size of ZnCO3 nanoparticles was quantitatively evaluated by the analysis of variance (ANOVA). The results showed that ZnCO3 nanoparticles can be synthesized via direct carbonation process by controlling Zinc and Carbonate ion concentrations and flow rate of reagent addition. The experimental results for preparation of nano-particles of ZnCO3 showed that the minimum size was about 15 nm and the maximum was about 70 nm. In the next step of this study, an efficient one-step thermal decomposition method was described for preparation of ZnO nanoparticles from Zinc Carbonate precursor. The prepared ZnCO3 and ZnO particles were characterized using X-ray diffraction (XRD), SEM, FT-IR and thermal analysis techniques.
Mehdi Rahiminasrabadi - One of the best experts on this subject based on the ideXlab platform.
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facile synthesis of Zinc Carbonate and Zinc oxide nanoparticles via direct carbonation and thermal decomposition
Ceramics International, 2013Co-Authors: Mojtaba Shamsipur, Mir Mahdi Zahedi, Seiedeh Somayyeh Hajimirsadeghi, Seied Mahdi Pourmortazavi, Mehdi RahiminasrabadiAbstract:Abstract Synthesis of ultrafine Zinc Carbonate and Zinc oxide powders using direct precipitation and thermal decomposition of the precursor was investigated. Nanoparticles of ZnCO3 were prepared by the direct precipitation method with Zn(NO3)2 and Na2CO3 as raw materials. The precipitation process as a popular, facile, controllable and cost-effective method was used to produce insoluble inorganic salts. Therefore, it was very important to improve capability and quality of the process for controlling the product particle size by setting the optimal precipitation reaction parameters. In this research, the parameter design of the Taguchi method was applied to set the optimal parameters of precipitation process for Zinc Carbonate nano-particle preparation. The reaction conditions such as Zinc and Carbonate ion concentrations, flow rate of reagent addition and reactor temperature were optimized by orthogonal array design, OA9. The effect of these factors on the size of ZnCO3 nanoparticles was quantitatively evaluated by the analysis of variance (ANOVA). The results showed that ZnCO3 nanoparticles can be synthesized via direct carbonation process by controlling Zinc and Carbonate ion concentrations and flow rate of reagent addition. The experimental results for preparation of nano-particles of ZnCO3 showed that the minimum size was about 15 nm and the maximum was about 70 nm. In the next step of this study, an efficient one-step thermal decomposition method was described for preparation of ZnO nanoparticles from Zinc Carbonate precursor. The prepared ZnCO3 and ZnO particles were characterized using X-ray diffraction (XRD), SEM, FT-IR and thermal analysis techniques.
Bernard Dupré - One of the best experts on this subject based on the ideXlab platform.
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Thermal decomposition of Zinc Carbonate hydroxide
Thermochimica Acta, 2004Co-Authors: Ndue Kanari, Devabrata Mishra, I. Gaballah, Bernard DupréAbstract:This study is devoted to the thermal decomposition of two Zinc Carbonate hydroxide samples up to 400 °C. Thermogravimetric analysis (TGA), boat experiments and differential scanning calorimetry (DSC) measurements were used to follow the decomposition reactions. The initial samples and the solid decomposition products were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and laser particle size analyzer. Results showed that Zinc Carbonate hydroxide decomposition started at about 150 °C and the rate of decomposition became significant at temperatures higher than 200 °C. The apparent activation energies (Ea) in the temperature range 150–240 °C for these two samples were 132 and 153 kJ/mol. The XRD analyses of the intermediately decomposed samples and the DSC results up to 400 °C suggested a single-step decomposition of Zinc Carbonate hydroxide to Zinc oxide with not much change in their overall morphologies.
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Thermal decomposition of Zinc Carbonate hydroxide
Thermochimica Acta, 2004Co-Authors: Ndue Kanari, Devabrata Mishra, I. Gaballah, Bernard DupréAbstract:International audienceThis study is devoted to the thermal decomposition of two Zinc Carbonate hydroxide samples up to 400 °C. Thermogravimetric analysis (TGA), boat experiments and differential scanning calorimetry (DSC) measurements were used to follow the decomposition reactions. The initial samples and the solid decomposition products were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and laser particle size analyzer. Results showed that Zinc Carbonate hydroxide decomposition started at about 150 °C and the rate of decomposition became significant at temperatures higher than 200 °C. The apparent activation energies (Ea) in the temperature range 150–240 °C for these two samples were 132 and 153 kJ/mol. The XRD analyses of the intermediately decomposed samples and the DSC results up to 400 °C suggested a single-step decomposition of Zinc Carbonate hydroxide to Zinc oxide with not much change in their overall morphologies
Mojtaba Shamsipur - One of the best experts on this subject based on the ideXlab platform.
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facile synthesis of Zinc Carbonate and Zinc oxide nanoparticles via direct carbonation and thermal decomposition
Ceramics International, 2013Co-Authors: Mojtaba Shamsipur, Mir Mahdi Zahedi, Seiedeh Somayyeh Hajimirsadeghi, Seied Mahdi Pourmortazavi, Mehdi RahiminasrabadiAbstract:Abstract Synthesis of ultrafine Zinc Carbonate and Zinc oxide powders using direct precipitation and thermal decomposition of the precursor was investigated. Nanoparticles of ZnCO3 were prepared by the direct precipitation method with Zn(NO3)2 and Na2CO3 as raw materials. The precipitation process as a popular, facile, controllable and cost-effective method was used to produce insoluble inorganic salts. Therefore, it was very important to improve capability and quality of the process for controlling the product particle size by setting the optimal precipitation reaction parameters. In this research, the parameter design of the Taguchi method was applied to set the optimal parameters of precipitation process for Zinc Carbonate nano-particle preparation. The reaction conditions such as Zinc and Carbonate ion concentrations, flow rate of reagent addition and reactor temperature were optimized by orthogonal array design, OA9. The effect of these factors on the size of ZnCO3 nanoparticles was quantitatively evaluated by the analysis of variance (ANOVA). The results showed that ZnCO3 nanoparticles can be synthesized via direct carbonation process by controlling Zinc and Carbonate ion concentrations and flow rate of reagent addition. The experimental results for preparation of nano-particles of ZnCO3 showed that the minimum size was about 15 nm and the maximum was about 70 nm. In the next step of this study, an efficient one-step thermal decomposition method was described for preparation of ZnO nanoparticles from Zinc Carbonate precursor. The prepared ZnCO3 and ZnO particles were characterized using X-ray diffraction (XRD), SEM, FT-IR and thermal analysis techniques.
Yinxi Zhang - One of the best experts on this subject based on the ideXlab platform.
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hydrogenated carboxylated nitrile rubber modified Zinc Carbonate basic composites with photoluminescence properties
European Polymer Journal, 2011Co-Authors: Qing Liu, Wentan Ren, Yong Zhang, Yinxi ZhangAbstract:Abstract A functional composite with unique photoluminescence property, excellent mechanical property and fine thermal stabilities were prepared through reactive blending of the hydrogenated carboxylated nitrile rubber (HXNBR) and modified Zinc Carbonate basic (m-3Zn(OH) 2 ·2ZnCO 3 ). The m-3Zn(OH) 2 ·2ZnCO 3 was obtained by sedimentation modification in superheated water using Zinc nitrate and ammonium Carbonate as raw materials, and was afforded better thermal stability. Photoluminescence spectra of the HXNBR/m-3Zn(OH) 2 ·2ZnCO 3 composites showed a characteristic emission band at 353 nm, and the luminescence intensity of the composites increased with increasing sedimentation modification time and loading of m-3Zn(OH) 2 ·2ZnCO 3 . The samples were further studied by X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscope (TEM). The results showed that the unique photoluminescence property of the HXNBR/m-3Zn(OH) 2 ·2ZnCO 3 composites was attributed to formation of the interface kernel/coating by an ester-like linkage –(C O)–O–[ZnO] from HXNBR and m-3Zn(OH) 2 ·2ZnCO 3 .
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Hydrogenated carboxylated nitrile rubber/modified Zinc Carbonate basic composites with photoluminescence properties
European Polymer Journal, 2011Co-Authors: Qing Liu, Wentan Ren, Yong Zhang, Yinxi ZhangAbstract:Abstract A functional composite with unique photoluminescence property, excellent mechanical property and fine thermal stabilities were prepared through reactive blending of the hydrogenated carboxylated nitrile rubber (HXNBR) and modified Zinc Carbonate basic (m-3Zn(OH) 2 ·2ZnCO 3 ). The m-3Zn(OH) 2 ·2ZnCO 3 was obtained by sedimentation modification in superheated water using Zinc nitrate and ammonium Carbonate as raw materials, and was afforded better thermal stability. Photoluminescence spectra of the HXNBR/m-3Zn(OH) 2 ·2ZnCO 3 composites showed a characteristic emission band at 353 nm, and the luminescence intensity of the composites increased with increasing sedimentation modification time and loading of m-3Zn(OH) 2 ·2ZnCO 3 . The samples were further studied by X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscope (TEM). The results showed that the unique photoluminescence property of the HXNBR/m-3Zn(OH) 2 ·2ZnCO 3 composites was attributed to formation of the interface kernel/coating by an ester-like linkage –(C O)–O–[ZnO] from HXNBR and m-3Zn(OH) 2 ·2ZnCO 3 .
