Study on preparation

In this study, we report on the hydrothermal synthesis of ZnO nanorods and the change in photocatalytic properties with different hydrothermal temperatures in the decomposition of Methylene blue (MB) and Rhodamine B (RhB) under visible light.

11p viengfa 28-10-2024 1 0   Download

The objective of this study was to evaluate the effects of land preparation methods and iron-coated (Fe-coated) rice seeds on the growth, yield, and Fe uptake of rice in alluvial soils in the Mekong Delta region.

10p vibecca 01-10-2024 2 1   Download

In this study, experimental results on mesoporous zeolite preparation from a common solid waste, the rice husk ash by a top-down and bottom-up approach were reported. In top-down method, the consecutive treatments of zeolite by acid and alkaline in the presence of a cationic surfactant (CTAB) successfully generated mesopores in the zeolite.

6p vikwong 29-09-2024 4 1   Download

This study focused on preparing the two low cost ILs triethylammonium oleate and triethylammonium stearate from low cost triethylamine and corresponding fatty acids. The long hydrocarbon chains of the carboxylate in ILs make them to stably disperse in the lubricants and increase the effeciency of additives. In addition, carboxylate ions are stable and not hydrolysed in contact with water.

7p vikwong 29-09-2024 1 1   Download

Porous carbon material is one of the most common and very important for various applications thank to its high surface area and adsorption capability. In this study, mesoporous carbon was prepared by thermal decomposition of copper-based metal-organic framework MOF-199 under inert atmosphere and followed by immersing in diluted HNO3 solution in order to remove metal/metal oxide and activation of the resultant porous carbon.

5p vikwong 29-09-2024 4 1   Download

The single phase of Mn0.5Fe2.5O4 spinel crystals was prepared by the microemulsion method with the oil phase is DGDE (diethylene glycol diethyl ether). The characteristics of the materials have been determined by the X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX), Scanning electron microscopy (SEM) and Brunaure-Emmet-Teller (BET) nitrogen adsorption and desorption, Vibration sampling magnetometer (VSM), Fourier transform infrared spectroscopy (FTIR).

7p vikwong 29-09-2024 3 1   Download

This study focused on the preparation of silver nanoparticles embedded on the supports such as bentonites, zeolites, activated carbon, zinc oxide, and aluminum oxide. Catalytic activity was evaluated via the transfer hydrogenation of 4-methoxybenzaldehyde. The results will be presented in this report.

5p vikwong 29-09-2024 4 2   Download

In this study, ZnO was synthesized by the simple hydrothermal method. The physicochemical properties of the materials were characterized by SEM, XRD, N adsorption/desorption isotherm methods.

6p vikwong 29-09-2024 2 1   Download

Non-metallic C, N, and S doped TiO2 materials were prepared using the hydrothermal method from titanyl sulfate solution with different doped precursors. The influence of non-metallic elements on crystal structure, morphology, surface area, bonding state, and light absorption ability of materials was studied through XRD, SEM, BET spectra, and UVis - DRS.

5p vikwong 29-09-2024 3 1   Download

In this study, SrTiO3 catalyst was prepared by sol-gel method and CuOZnO by co-precipitation for oxidative coupling of methane (OCM). The XRDresults showed a stable phase structure and high crystallinity with both samples. NH3-TPD recorded weak acid centers on SrTiO3, leading to coke formation on the impact surface. H2-TPR and O2 - TPD express the redox of CuO-ZnO, resulting in a deep oxidation product of CO2.

8p vikwong 29-09-2024 4 1   Download

AD/CAM hybrid ceramic restorations have been developed enormously in recent years. This study aimed to evaluate the treatment outcomes of CAD/CAM hybrid ceramic overlays (Shofu HC). A prospective, descriptive clinical trial study has been conducted on 30 permanent posterior teeth with cavities that need to be restored by overlay. All 30 teeth were prepared and restored by CAD/CAM hybrid ceramic overlays (Shofu disc HC).

6p viormkorn 27-09-2024 2 1   Download

In this work, SrFe12O19 samples were synthesized by hydrothermal method. We systematically studied the influence of an alkaline environment (NaOH) with the molar ratio (R) of 2 , 3 and 4 on the structure, magnetic properties of SrFe12O19 particles prepared by hydrothermal method. The relation between morphology, magnetic properties and microwave absorption properties of materials have been investigated.

8p viambani 18-06-2024 2 1   Download

In this study, we synthesized hydroxyapatite (HA) on polyvinyl alcohol/TiO2 (PVA/TiO2) in which TiO2 was prepared by the sol-gel method. HA was formed by immersing the membrane in the simulated body fluid (SBF) solution. We improved the mechanical strength of the membranes by adding glutaraldehyde (GA) combining with heat treatment to cross-link the polymer network.

14p dianmotminh02 03-05-2024 3 2   Download

The present study focuses on the preparation of silver/copper bimetallic hybrid nanoparticles by green method from precursor solutions of silver nitrate & copper nitrate and the locally available citrus fruit (lemon) peel extract which behaves as the stabilizing and reducing agent. Initially, the formation of hybrid nanoparticles was noticed in the reaction mixture by colour change.

7p dianmotminh02 03-05-2024 6 2   Download

Lead-free (Na0.59K0.41)(Nb1-xSbx)O3 ceramic (x = 0 ÷ 0.12) were prepared by the solid phase reaction method. This study aimed to address the need for practical applications by examining the impact of (K0.41Na0.59)NbO3 lead-free.

8p viritesh 02-04-2024 7 3   Download

Amorphous alloy ribbons of (Fe50Ni50)73.5Si13.5B9Nb3Cu1 were fabricated by rapid cooling technique on single copper wheel. After fabrication, the crystalline structure of the ribbons were examined by X-ray diffraction method. The results show that the samples possess a complete amorphous state.

6p viberkshire 09-08-2023 12 5   Download

The study was carried out by retrospective descriptive method with the list of drugs used at the hospital in 2021 including 237 drugs. Results: Class A drugs accounted for 20.25% of the total number of drugs, accounting for 80% of the use value; class B drugs accounted for 21.52% in quantity and 14.94% in use value; class C drugs accounted for 58.23% in quantity and 5.06% in use value. In class A, the class of traditional medicine preparations accounts for 18.75% in quantity and 21.56% in use value.

9p nhanchienthien 25-07-2023 8 3   Download

The specific objectives of this study are: 1. To conduct a literature review on carbon-based hydrogen storage electrodes and direct proton absorbance in various forms of carbon; 2. To prepare and characterise activated carbon samples with proper porosity for the present application; 3. To manufacture and characterise a range of composite materials containing carbon material and a proton-conducting medium such as nafion in various levels of hydration 4. To fabricate a number of membrane-electrode-assembly (MEA) from the composite materials;…

264p runthenight05 01-03-2023 6 3   Download

This study focuses on the stability of nano-emulsions produced by phase inversion temperature method using n-Decane and n-Dodecane as the dispersed phase and pure water/brine as the aqueous phase (continuous phase). A non-ionic surfactant (Brij 30) was used in the preparation of the nano-emulsions. Three different types salt namely \(NaCl\), \(KCl\) and \(MgC{l_2}\) were used at different concentrations.

173p runthenight07 01-03-2023 3 3   Download

The focus of this study is to investigate its optical and conductive properties under different conditions of doping environments, temperature and polymerization conditions. Optical characterization technique such as UV-Visible spectroscopy is developed to carry out the investigation. The developed nanofibers have been demonstrated to possess optical and conductive properties to be dependent on doping variables. Study of these optical properties could prove very useful in the development of electrochromic devices and gas sensors.

103p runthenight07 01-03-2023 7 3   Download