A5101678651- Adsorption and biosorption for pollutant removal
- Electrochemical sensors and biosensors
- Nanomaterials for catalytic reactions
- Graphene and Nanomaterials Applications
- Bone Tissue Engineering Materials
- Advanced Photocatalysis Techniques
- Nanoparticles: synthesis and applications
- Analytical Chemistry and Sensors
- Quantum Dots Synthesis And Properties
- ZnO doping and properties
- Analytical chemistry methods development
- Coding theory and cryptography
- Conducting polymers and applications
- Nanocomposite Films for Food Packaging
- Advanced biosensing and bioanalysis techniques
- Fixed Point Theorems Analysis
- Environmental remediation with nanomaterials
- Opportunistic and Delay-Tolerant Networks
- Dental materials and restorations
- Multiferroics and related materials
- Mesoporous Materials and Catalysis
- Magnesium Oxide Properties and Applications
- Carbon and Quantum Dots Applications
- Advanced Nanomaterials in Catalysis
- Titanium Alloys Microstructure and Properties
Hanoi University of Science and Technology
2011-2024
The State Bank of Vietnam
2024
Yokohama National University
2022
National Institute of Advanced Industrial Science and Technology
2022
University of Electro-Communications
2022
Ho Chi Minh City University of Education
2020
Dong Thap University
2016
Hanoi University
2009-2010
University of California, Los Angeles
2003
ZnO/chitosan nanocomposite was successfully synthesized by in-situ precipitation method. The material characterized XRD, FESEM, TEM, FTIR, BET, and TGA. Results show that has spherical shape with the average size of 20–25 nm. BET surface area pore are 2.2436 (m 2 /g) 12.2 nm, respectively. applied as an adsorbent for congo red removal from aqueous solutions. adsorption is better described Langmuir model (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
An eco-friendly method for the synthesis of ZnO nanoparticles was studied. Zinc acetate precursor thermally decomposed without adding any chemical agents. The synthesized materials were thoroughly characterized by various analytical tools. results indicated that nanomaterials have a wurtzite structure. estimated crystallite sizes obtained at 450, 550, 650, and 750°C (named as ZnO-450, ZnO-550, ZnO-650, ZnO-750) 33, 36, 38, 42 nm, respectively. morphology revealed to be affected calcination...
In this study, we present a novel approach to prepare of colorimetric chemical sensor for H2O2 and glucose biosensor basing on the use peroxidase-like activity silver nanoparticles decorated reduced graphene oxide sheets ([email protected]) nanocomposite. Herein, [email protected] nanocomposite was synthesized by one-step hydrothermal reducing method its physico-chemical properties were characterized X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Ultraviolet–visible...
Abstract This paper describes a glucose electrochemical biosensor, layer-by-layer fabricated from graphene and polyaniline films. Graphene sheets (0.5×0.5 cm 2 ) with the thickness of 5 nm (15 layers) were synthesized by thermal chemical vapor deposition (CVD) under ambient pressure on copper tapes. Then they transferred into integrated Fe 3 O 4 -doped (PANi) based microelectrodes. The properties nanocomposite films thoroughly characterized scanning electron microscopy (SEM), Raman...
Abstract Polyaniline-carboxylic multiwalled carbon nanotubes composite film (PANi-MWCNT) has been polymerized on the surface of interdigitated platinum electrode (fabricated by MEMS technology) which was compatibly connected to Autolab interface via universal serial bus (USB). An amperometric biosensor based covalent immobilization cholesterol oxidase (ChOx) PANi–MWCNT with potassium ferricyanide (FeCN) as redox mediator developed. The helps shuttle electrons between immobilized ChOx and...
In this work, PrFeO3 nanoparticles were synthesized by modified co-precipitation method and annealed at different temperatures up to 850?C. The have single phase orthorhombic structure the average particle size of 25-30 nm. Due very small prepared are capable being used as photocatalyst materials thanks their strong adsorption bands 230-400 nm 400-800 observed from UV-Vis spectra. Additionally, paramagnetic with Hc ~ 10Oe Mr 0. These findings demonstrate potential use not only...
Abstract Being naturally abundant resources and having many interesting physicochemical biological properties, chitin/chitosan have been found to be useful in fields, especially biomedical ones. This paper describes the strategy design multifunctional, hybrid chitosan-based nanomaterials test them some typical applications.
In this study, Graphene oxide (GO) was synthesized for the treatment of antibiotic residues in aquatic environment. The characteristics GO material were analyzed by XRD, and SEM methods. used adsorption tetracycline hydrochloride (TCH) an aqueous equilibration time is 30 min. factors that affect process investigated including initial TCH concentration (10-40 mg/L), content (0,1-0,5 g/L), pH solution (1-9). on consistent with Freundlich isotherm model. exothermic.
Magnetic Fe3O4 nanoparticles (Fe3O4 NPs) were synthesized by co-precipitation (of Fe2+ and Fe3+) surface-carboxylated poly(styrene-co-acrylic acid) (PSA). Then they thoroughly characterized Scanning Electron Microscope Transmission analyses. Using glutaraldehyde cross-linking immobilization strategy, cholesterol oxidase (ChOx) was immobilized onto Fe3O4/PSA microspheres. The Fe3O4/PSA-ChOx has been successfully on the planar platinum polyaniline (PANi) modified electrode. PANi/Fe3O4/PSA-ChOx...
Magnetite (Fe3O4) nanoparticles were synthesized by the ultrasound assisted co-precipitation method. The thoroughly characterized various analytical tools including XRD, FESEM & TEM, VSM, BET, and FTIR. It was indicated that Fe3O4 have cubic structure. size of spherical-shape particles ranges from 10 to 15 nm. magnetic applied as a adsorbent remove Congo red aqueous solution. is assumed adsorption process follows pseudo-second-order kinetics equation. Equilibrium data fits well with Langmuir...
In this study we synthesized nano-sized ZnO particles by ultrasonic-assisted sol-gel method. The materials were, then, sintered at different temperatures of 400 o C, 500 600 and 700 C. structural, morphological, optical properties the obtained nanoparticles were characterized XRD, UV VIS, FE-SEM, TEM. results showed that have a hexagonal wurtzite crystalline structure, spherical shapes, an average size 22-30 nm. used as photocatalysts to decompose methylene blue under ultraviolet light. are...
In this paper, we are concerned with abstract random linear operators on probabilistic unitary spaces which a generalization of generalized Hilbert space defined in [25]. The representation theorem for bounded and some results the adjoint given.
In mobile ad hoc networks (MANET) nodes are often organized into groups with different tasks and, correspondingly, functional and operational characteristics. particular, in the same group have coordinated motion. The motion pattern considerably simplifies mobility management allows efficient scalable routing. this paper, we propose an scheme to discover identifier of a given destination. Our utilizes underlying landmark routing protocol (LANMAR) structures. our scheme, when communication is...
In this work, the CdS and CdSe QDs modification expands photoresponse range ofTiO2 nanoparticles from ultraviolet region to visible range. It is demonstrated thatsequentially assembled significantly improved light harvesting abilityand photocurrent efficiency, a high incident photon current conversion efficiency of1.52 % was obtained. Further coating TiO2/CdS/CdSe electrodes with barrier layer ofZnS increases 264 %.
Nano ZnO/chitosan composite was synthesized using precipitation method. The material characterized by physicochemical analysis methods including XRD and TEM. results showed that the spherical rod-shaped particles were well-dispersed with average size of 30-40 nm. applied as an adsorbent to remove congo red from aqueous solution. Equilibrium data fitted well Langmuir model. It is assumed adsorption process follows pseudo-second-order kinetics equation. maximum capacity 281.69 mg/g. This...
This paper presents a facile synthesis of nano-silica by hydrothermal treatment assisted cetyltrimethylammonium bromide (CTAB). The effect CTAB on the morphology material was also investigated. Structure, morphology, and composition were studied byvarious methods such as XRD, SEM, FT-IR, EDX.The results showed that sample nanosilica with amount 1,0 g at pH 10-11 reached most appropriate size, average length width are 231,34±48,98 nm và 113,05±16,45 nm, respectively. In addition, indicated...
Dougall 5F4求和公式是特殊函数论中一个重要的级数求和公式，其在不同领域中的应用已被人们广泛讨论.本文以该公式为基础导出了一些新的求和公式，并利用这些公式给出了一系列新的关于1/π和1/π2的Ramanujan型级数公式.