The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

Meng-yun Chung - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of the suspension stability of silver nanocolloids prepared by electric spark discharge method
    2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018
    Co-Authors: Kuo-hsiung Tseng, Chaur-yang Chang, Meng-yun Chung
    Abstract:

    This study uses the electric spark discharge method (ESDM) to prepare silver nanocolloids (SNC). The devices and material for the preparation include an industrial electric discharge machine (EDM), Magnetic Stirrer, ultrasonic oscillator, 99.9% pure silver wires, and deionized water (DW). According to the analysis of the field-emission scanning electron microscopy (FE-SEM), UV-Vis and Zetasizer, the prepared SNC has nanoparticles (NPs), the wavelength eigenvalue is 393nm, absorbent concentration is 0.22, and zeta-potential is -38.9mV. The results demonstrate that ESDM can prepare SNC with good suspension stability. In this experiment, which discusses the effect of a Magnetic Stirrer and an ultrasonic oscillator on the suspension stability of SNC, the analysis of the absorbent concentration of the UV-Vis showed that the agglomerated NPs can be dispersed by using a Magnetic Stirrer or ultrasonic oscillator. According to the analysis of Zetasizer, the colloids that are remixed by a Magnetic Stirrer or ultrasonic oscillator contain a large number of NPs. As compared to other SNC preparation methods, ESDM can provide a clean process environment without dust emissions, and no suspending agents are added in the process. As the prepared colloids contain no other derivatives, it can be applied to antibacterial deodoriz ation. If it is used for water purification, secondary pollution can be prevented. If used in cosmetics, personal protective products, and medical purposes, it can avoid adverse effects on the human body.

Kuo-hsiung Tseng - One of the best experts on this subject based on the ideXlab platform.

  • Preparation of Graphene Colloids in Different Dispersing Devices by Electric Spark Discharge Method and Analysis of Their Suspension Stability
    2019 IEEE 6th International Conference on Industrial Engineering and Applications (ICIEA), 2019
    Co-Authors: Kuo-hsiung Tseng, Hsueh-chien Ku, Chaur-yang Chang
    Abstract:

    In this study, electrical discharge machine (EDM) was used to prepare graphene colloids by the electric spark discharge method (ESDM). Machine-lathed 99% pure graphite rods were used as the electrodes, deionized water (DI water) was used as the dielectric liquor, and a Magnetic Stirrer and ultrasonic cleaner were used as the dispersing devices. According to the analysis results from ultraviolet-visible spectroscopy (UV-Vis), Zetasizer, and transmission electron microscope (TEM), the characteristic wavelength of graphene was 260 nm with an absorbance of 0.219 and a zeta potential of -36.6 mV, and many graphene laminates could be seen based on the microscale. This study discussed the two different dispersing devices used to make graphene colloids and analyzed their impact on suspension stability. The results showed that a Magnetic Stirrer was suitable for making graphene colloids with high suspension stability and low concentration, while an ultrasonic cleaner was suitable for making graphene colloids with low suspension stability and high concentration. The graphemes made by the chemical method are difficult to suspend in water and chemical or dispersant additives are required to maintain their properties; furthermore, which increases the production time. However, with no need for chemical additions and a short preparation time, ESDM is a safe, environmentally-friendly, and fast green manufacturing method.

  • Analysis of the suspension stability of silver nanocolloids prepared by electric spark discharge method
    2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018
    Co-Authors: Kuo-hsiung Tseng, Chaur-yang Chang, Meng-yun Chung
    Abstract:

    This study uses the electric spark discharge method (ESDM) to prepare silver nanocolloids (SNC). The devices and material for the preparation include an industrial electric discharge machine (EDM), Magnetic Stirrer, ultrasonic oscillator, 99.9% pure silver wires, and deionized water (DW). According to the analysis of the field-emission scanning electron microscopy (FE-SEM), UV-Vis and Zetasizer, the prepared SNC has nanoparticles (NPs), the wavelength eigenvalue is 393nm, absorbent concentration is 0.22, and zeta-potential is -38.9mV. The results demonstrate that ESDM can prepare SNC with good suspension stability. In this experiment, which discusses the effect of a Magnetic Stirrer and an ultrasonic oscillator on the suspension stability of SNC, the analysis of the absorbent concentration of the UV-Vis showed that the agglomerated NPs can be dispersed by using a Magnetic Stirrer or ultrasonic oscillator. According to the analysis of Zetasizer, the colloids that are remixed by a Magnetic Stirrer or ultrasonic oscillator contain a large number of NPs. As compared to other SNC preparation methods, ESDM can provide a clean process environment without dust emissions, and no suspending agents are added in the process. As the prepared colloids contain no other derivatives, it can be applied to antibacterial deodoriz ation. If it is used for water purification, secondary pollution can be prevented. If used in cosmetics, personal protective products, and medical purposes, it can avoid adverse effects on the human body.

Mustafa Tuzen - One of the best experts on this subject based on the ideXlab platform.

  • Magnetic Stirrer induced dispersive ionic liquid microextraction for the determination of vanadium in water and food samples prior to graphite furnace atomic absorption spectrometry
    Food Chemistry, 2015
    Co-Authors: Tasneem Gul Kazi, Mustafa Tuzen
    Abstract:

    A new dispersive liquid-liquid microextraction, Magnetic Stirrer induced dispersive ionic-liquid microextraction (MS-IL-DLLME) was developed to quantify the trace level of vanadium in real water and food samples by graphite furnace atomic absorption spectrometry (GFAAS). In this extraction method Magnetic Stirrer was applied to obtained a dispersive medium of 1-butyl-3-methylimidazolium hexafluorophosphate [C4MIM][PF6] in aqueous solution of (real water samples and digested food samples) to increase phase transfer ratio, which significantly enhance the recovery of vanadium - 4-(2-pyridylazo) resorcinol (PAR) chelate. Variables having vital role on desired microextraction methods were optimised to obtain the maximum recovery of study analyte. Under the optimised experimental variables, enhancement factor (EF) and limit of detection (LOD) were achieved to be 125 and 18 ng L(-1), respectively. Validity and accuracy of the desired method was checked by analysis of certified reference materials (SLRS-4 Riverine water and NIST SRM 1515 Apple leaves). The relative standard deviation (RSD) for 10 replicate determinations at 0.5 μg L(-1) of vanadium level was found to be <5.0%. This method was successfully applied to real water and acid digested food samples.

  • Magnetic Stirrer induced dispersive ionic-liquid microextraction for the determination of vanadium in water and food samples prior to graphite furnace atomic absorption spectrometry.
    Food Chemistry, 2014
    Co-Authors: Naeemullah, Tasneem Gul Kazi, Mustafa Tuzen
    Abstract:

    A new dispersive liquid-liquid microextraction, Magnetic Stirrer induced dispersive ionic-liquid microextraction (MS-IL-DLLME) was developed to quantify the trace level of vanadium in real water and food samples by graphite furnace atomic absorption spectrometry (GFAAS). In this extraction method Magnetic Stirrer was applied to obtained a dispersive medium of 1-butyl-3-methylimidazolium hexafluorophosphate [C4MIM][PF6] in aqueous solution of (real water samples and digested food samples) to increase phase transfer ratio, which significantly enhance the recovery of vanadium - 4-(2-pyridylazo) resorcinol (PAR) chelate. Variables having vital role on desired microextraction methods were optimised to obtain the maximum recovery of study analyte. Under the optimised experimental variables, enhancement factor (EF) and limit of detection (LOD) were achieved to be 125 and 18 ng L(-1), respectively. Validity and accuracy of the desired method was checked by analysis of certified reference materials (SLRS-4 Riverine water and NIST SRM 1515 Apple leaves). The relative standard deviation (RSD) for 10 replicate determinations at 0.5 μg L(-1) of vanadium level was found to be

Chaur-yang Chang - One of the best experts on this subject based on the ideXlab platform.

  • Preparation of Graphene Colloids in Different Dispersing Devices by Electric Spark Discharge Method and Analysis of Their Suspension Stability
    2019 IEEE 6th International Conference on Industrial Engineering and Applications (ICIEA), 2019
    Co-Authors: Kuo-hsiung Tseng, Hsueh-chien Ku, Chaur-yang Chang
    Abstract:

    In this study, electrical discharge machine (EDM) was used to prepare graphene colloids by the electric spark discharge method (ESDM). Machine-lathed 99% pure graphite rods were used as the electrodes, deionized water (DI water) was used as the dielectric liquor, and a Magnetic Stirrer and ultrasonic cleaner were used as the dispersing devices. According to the analysis results from ultraviolet-visible spectroscopy (UV-Vis), Zetasizer, and transmission electron microscope (TEM), the characteristic wavelength of graphene was 260 nm with an absorbance of 0.219 and a zeta potential of -36.6 mV, and many graphene laminates could be seen based on the microscale. This study discussed the two different dispersing devices used to make graphene colloids and analyzed their impact on suspension stability. The results showed that a Magnetic Stirrer was suitable for making graphene colloids with high suspension stability and low concentration, while an ultrasonic cleaner was suitable for making graphene colloids with low suspension stability and high concentration. The graphemes made by the chemical method are difficult to suspend in water and chemical or dispersant additives are required to maintain their properties; furthermore, which increases the production time. However, with no need for chemical additions and a short preparation time, ESDM is a safe, environmentally-friendly, and fast green manufacturing method.

  • Analysis of the suspension stability of silver nanocolloids prepared by electric spark discharge method
    2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018
    Co-Authors: Kuo-hsiung Tseng, Chaur-yang Chang, Meng-yun Chung
    Abstract:

    This study uses the electric spark discharge method (ESDM) to prepare silver nanocolloids (SNC). The devices and material for the preparation include an industrial electric discharge machine (EDM), Magnetic Stirrer, ultrasonic oscillator, 99.9% pure silver wires, and deionized water (DW). According to the analysis of the field-emission scanning electron microscopy (FE-SEM), UV-Vis and Zetasizer, the prepared SNC has nanoparticles (NPs), the wavelength eigenvalue is 393nm, absorbent concentration is 0.22, and zeta-potential is -38.9mV. The results demonstrate that ESDM can prepare SNC with good suspension stability. In this experiment, which discusses the effect of a Magnetic Stirrer and an ultrasonic oscillator on the suspension stability of SNC, the analysis of the absorbent concentration of the UV-Vis showed that the agglomerated NPs can be dispersed by using a Magnetic Stirrer or ultrasonic oscillator. According to the analysis of Zetasizer, the colloids that are remixed by a Magnetic Stirrer or ultrasonic oscillator contain a large number of NPs. As compared to other SNC preparation methods, ESDM can provide a clean process environment without dust emissions, and no suspending agents are added in the process. As the prepared colloids contain no other derivatives, it can be applied to antibacterial deodoriz ation. If it is used for water purification, secondary pollution can be prevented. If used in cosmetics, personal protective products, and medical purposes, it can avoid adverse effects on the human body.

Tasneem Gul Kazi - One of the best experts on this subject based on the ideXlab platform.

  • Magnetic Stirrer induced dispersive ionic liquid microextraction for the determination of vanadium in water and food samples prior to graphite furnace atomic absorption spectrometry
    Food Chemistry, 2015
    Co-Authors: Tasneem Gul Kazi, Mustafa Tuzen
    Abstract:

    A new dispersive liquid-liquid microextraction, Magnetic Stirrer induced dispersive ionic-liquid microextraction (MS-IL-DLLME) was developed to quantify the trace level of vanadium in real water and food samples by graphite furnace atomic absorption spectrometry (GFAAS). In this extraction method Magnetic Stirrer was applied to obtained a dispersive medium of 1-butyl-3-methylimidazolium hexafluorophosphate [C4MIM][PF6] in aqueous solution of (real water samples and digested food samples) to increase phase transfer ratio, which significantly enhance the recovery of vanadium - 4-(2-pyridylazo) resorcinol (PAR) chelate. Variables having vital role on desired microextraction methods were optimised to obtain the maximum recovery of study analyte. Under the optimised experimental variables, enhancement factor (EF) and limit of detection (LOD) were achieved to be 125 and 18 ng L(-1), respectively. Validity and accuracy of the desired method was checked by analysis of certified reference materials (SLRS-4 Riverine water and NIST SRM 1515 Apple leaves). The relative standard deviation (RSD) for 10 replicate determinations at 0.5 μg L(-1) of vanadium level was found to be <5.0%. This method was successfully applied to real water and acid digested food samples.

  • Magnetic Stirrer induced dispersive ionic-liquid microextraction for the determination of vanadium in water and food samples prior to graphite furnace atomic absorption spectrometry.
    Food Chemistry, 2014
    Co-Authors: Naeemullah, Tasneem Gul Kazi, Mustafa Tuzen
    Abstract:

    A new dispersive liquid-liquid microextraction, Magnetic Stirrer induced dispersive ionic-liquid microextraction (MS-IL-DLLME) was developed to quantify the trace level of vanadium in real water and food samples by graphite furnace atomic absorption spectrometry (GFAAS). In this extraction method Magnetic Stirrer was applied to obtained a dispersive medium of 1-butyl-3-methylimidazolium hexafluorophosphate [C4MIM][PF6] in aqueous solution of (real water samples and digested food samples) to increase phase transfer ratio, which significantly enhance the recovery of vanadium - 4-(2-pyridylazo) resorcinol (PAR) chelate. Variables having vital role on desired microextraction methods were optimised to obtain the maximum recovery of study analyte. Under the optimised experimental variables, enhancement factor (EF) and limit of detection (LOD) were achieved to be 125 and 18 ng L(-1), respectively. Validity and accuracy of the desired method was checked by analysis of certified reference materials (SLRS-4 Riverine water and NIST SRM 1515 Apple leaves). The relative standard deviation (RSD) for 10 replicate determinations at 0.5 μg L(-1) of vanadium level was found to be