Browsing by Author "Thitinat Sukonket"

Now showing 1 - 7 of 7
  • Default Image
    Item
    A facile fynthesis of ZnS nanostructures via liquid-solid reactions
    (Trans Tech Publications Ltd, 2014) Weerachon Phoohinkong; Thitinat Sukonket; Udomsak Kitthawee
    Zinc sulfide (ZnS) nanostructures are important materials for many technologies such as sensors, infrared windows, transistors, LED displays, and solar cells. However, many methods of synthesizing ZnS nanostructures are complex and require expensive equipment. In this study, a liquid-solid chemical reaction without surfactant was used to synthesize ZnS at room temperature. In addition, commercial grade zinc oxide (ZnO) particles were used as a precursor. The effect of the addition of acids and inorganic salts were investigated. The products were characterized by field emission scanning electron microscopy (FESEM) coupled with energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The results show that the nanoparticles of ZnS were obtained in hydrochloric acid and acetic acid addition. The diameters were in the range of 10 to 20 nm and 50 to 100 nm, respectively. In the case of a sodium chloride salt addition, a ZnS structure was obtained with a particle size of approximately 5 nm and a flake-like morphology. © (2014) Trans Tech Publications, Switzerland.
  • Default Image
    Item
    A simple method for large-scale synthesis of nano-sized zinc sulfide
    (Trans Tech Publications Ltd, 2014) Weerachon Phoohinkong; Thitinat Sukonket
    Nano-sized zinc sulfide (ZnS) is a special property semiconductor material widely used in many applications such as catalyst, light emitting diode, transistor, gas sensors, biosensors, UV-light sensors, and photovoltaic cell. The wet chemical method is a simple and low-cost method to prepare nano-sized zinc sulfide. However, the wet chemical reaction using sodium sulfide without surfactant or template has rarely been reported. In the present work nano-sized zinc sulfide particles were synthesized by simple wet chemical reaction method at room temperature and without any surfactant. The influence of sulfur source, sodium sulfide and potassium sulfide used as the reactant were investigated. The samples were characterized by scanning electron microscopy coupling with energy-dispersive X-ray spectroscopy (FESEM-EDX), and transmission electron microscopy (TEM). The results show that the nanoparticles of zinc sulfide were obtained from sodium sulfide and potassium sulfide with particles sizes are in the range of 10 to 50 nm and 25 to 50 nm respectively. In addition, from FESEM microphotograph the primary ZnS particles size of around 5 nm and 25 nm were obtained by 10% salt (sodium chloride, potassium chloride, sodium acetate) addition with sodium sulfide and potassium sulfide reactant respectively. © (2014) Trans Tech Publications, Switzerland.
  • Default Image
    Item
    Improved hydrogen production from dry reforming reaction using a catalytic packed-bed membrane reactor with Ni-based catalyst and dense PdAgCu alloy membrane
    (Elsevier Ltd, 2016) Sarocha Sumrunronnasak; Supawan Tantayanon; Somchai Kiatgamolchai; Thitinat Sukonket; S. Tantayanon; Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; email: supawan.t@chula.ac.th
    A catalytic Pd76Ag19Cu5 alloy membrane reactor packed with 5% Ni/Ce0.6Zr0.4O2 catalyst was adopted in this study to investigate hydrogen production performance from the dry reforming reaction of methane and carbon dioxide. The 1:1 CH4/CO2 feed was introduced to the reactor with 60 mg of the catalyst at a flow rate of 20 ml/min at 550 �C. The effluent gas compositions were examined using an online gas chromatographer (GC). Compared to a conventional reactor without the membrane, the CH4 and CO2 conversions were significantly increased by 3.5-fold and 1.5-fold, respectively. Correspondingly, the overall H2 yield was greatly improved from about 10-35%. Additionally, the hydrogen selectivity increased from 47 to 53%. It is theorized that the in-situ partial hydrogen withdrawal by the membrane mainly caused the dry reforming reaction equilibrium to shift forward and created a hydrogen-deprived environment unfavorable for the competing reversible water-gas shift reaction to take place. � 2015 Hydrogen Energy Publications, LLC.
  • Default Image
    Item
    Preparation of nano-sized manganese oxide particles via solid-state route reaction
    (Trans Tech Publications Ltd, 2016) Weerachon Phoohinkong; Thitinat Sukonket
    Nano-sized manganese oxide particles are attracted considerable interest in many industry areas especially in energy storage device applications because of their unique properties. For industry large scale synthesis, it needs a simple and low energy technique for scaling up production process. In this work, nano-sized manganese oxide particles were prepared via a solid-state reaction route at room temperature. The products were characterized by field emission scanning electron microscopy (FE-SEM) coupled with energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction infrared spectroscopy (XRD), and raman spectroscopy. The results show that the sizes of particles were smaller than 50 nm with narrow size distribution and high yield were obtained. In addition, this technique may be applicable to industry production of nano-sized manganese oxide or nano-sized manganese oxide composite. � 2016 Trans Tech Publications, Switzerland.
  • Default Image
    Item
    Utilization of Natural Polymer Wall Materials for Health-Effective Lycopene Encapsulation
    (Research and Development Institute Suan Dusit University, 2023) Yotsinee Huadong; Tita Foophow; Thitinat Sukonket; Weerachon Phoohinkong; W. Phoohinkong; Faculty of Science and Technology, Suan Dusit University, Bangkok, 10700, Thailand; email: weerachon_pho@dusit.ac.th
    Natural phytochemical carotenoids, pivotal for human health, enhance wellness, and exhibits anti-aging properties. Lycopene, distinguished by exceptional antioxidant properties, offers protection against oxidative stress. Studied extensively for its potential in medical interventions, it mitigates the risk of diseases like arteriosclerosis and breast cancer. However, lycopene's high antioxidant activity makes it prone to degradation from environmental stresses like oxygen and light, impacting processing and storage. Its water and ethanol insolubility contribute to poor bioavailability. Encapsulation technology addresses these challenges, gaining interest for health benefits in functional foods and cosmeceutical products. The process of lycopene encapsulation, with a specific focus on the selection of diverse wall materials, has demonstrated a substantial impact on both the physical and functional attributes of the encapsulated lycopene within natural biomaterials employed for biomedicine. Natural polymers assume a crucial role in the advancement of biomedicine, nutraceuticals and the functional food industry, particularly in the encapsulation of natural active compounds such as lycopene. Consequently, there is a discernible trend towards the extensive utilization of natural polymers. The choice of a suitable wall material is of paramount importance as it significantly determines the efficacy and success of the encapsulation process. The utilization of natural polymer wall materials presents potential strategies for health-effective lycopene encapsulation. This paper provides a comprehensive overview of lycopene encapsulation, specifically focusing on polysaccharides and proteins, including oligosaccharides and cyclodextrin. The incorporation of these natural polymers in lycopene encapsulation enhances the bioavailability and stability of lycopene, rendering it suitable for diverse biomedical and nutritional applications. © 2023, Research and Development Institute Suan Dusit University. All rights reserved.
  • Thumbnail Image
    Item
    Utilization of Natural Polymer Wall Materials in Strategies for Health-Effective Lycopene Encapsulation
    (J. Food Health and Bioenvironmental Science 16(3): 57-62., 2023-11-27) Yotsinee Huadong; Tita Foophow; Thitinat Sukonket; Weerachon Phoohinkong
    Natural phytochemical carotenoids, pivotal for human health, enhance wellness, and exhibits anti-aging properties. Lycopene, distinguished by exceptionalantioxidant properties, offers protection against oxidative stress. Studied extensivelyfor its potential in medical interventions, it mitigates the risk of diseases like arteriosclerosis and breast cancer. However, lycopene's high antioxidant activity makes it prone to degradation from environmental stresses like oxygen and light, impacting processing and storage. Its water and ethanol insolubility contribute to poor bioavailability. Encapsulation technology addresses these challenges, gaining interest for health benefits in functional foods and cosmeceutical products. The process of lycopene encapsulation, with a specific focus on the selection of diverse wall materials, has demonstrated a substantial impact on both the physical and functional attributes of the encapsulated lycopene within natural biomaterials employed for biomedicine. Natural polymers assume a crucial role in the advancement of biomedicine, nutraceuticals and the functional food industry, particularly in the encapsulation of natural active compounds such as lycopene. Consequently, there is a discernible trend towards the extensive utilization of natural polymers. The choice of a suitable wall material is of paramount importance as it significantly determines the efficacy and success of the encapsulation process. The utilization of natural polymer wall materials presents potential strategies for health-effective lycopene encapsulation. This paper provides a comprehensive overview of lycopene encapsulation, specifically focusing on polysaccharides and proteins, including oligosaccharides and cyclodextrin. The incorporation of these natural polymers in lycopene encapsulation enhances the bioavailability and stability of lycopene, rendering it suitable for diverse biomedical and nutritional applications.
  • Default Image
    Item
    Utilization of Natural Polymer Wall Materials in Strategies for Health-Effective Lycopene Encapsulation
    (Graphicsite, 2023-12-18) Yotsinee Huadong; Tita Foophow; Thitinat Sukonket; Weerachon Phoohinkong
    Natural phytochemical carotenoids, pivotal for human health, enhance wellness, and exhibits anti-aging properties. Lycopene, distinguished by exceptional antioxidant properties, offers protection against oxidative stress. Studied extensively for its potential in medical interventions, it mitigates the risk of diseases like arteriosclerosis and breast cancer. However, lycopene's high antioxidant activity makes it prone to degradation from environmental stresses like oxygen and light, impacting processing and storage. Its water and ethanol insolubility contribute to poor bioavailability. Encapsulation technology addresses these challenges, gaining interest for health benefits in functional foods and cosmeceutical products. The process of lycopene encapsulation, with a specific focus on the selection of diverse wall materials, has demonstrated a substantial impact on both the physical and functional attributes of the encapsulated lycopene within natural biomaterials employed for biomedicine. Natural polymers assume a crucial role in the advancement of biomedicine, nutraceuticals and the functional food industry, particularly in the encapsulation of natural active compounds such as lycopene. Consequently, there is a discernible trend towards the extensive utilization of natural polymers. The choice of a suitable wall material is of paramount importance as it significantly determines the efficacy and success of the encapsulation process. The utilization of natural polymer wall materials presents potential strategies for health-effective lycopene encapsulation. This paper provides a comprehensive overview of lycopene encapsulation, specifically focusing on polysaccharides and proteins, including oligosaccharides and cyclodextrin. The incorporation of these natural polymers in lycopene encapsulation enhances the bioavailability and stability of lycopene, rendering it suitable for diverse biomedical and nutritional applications.