Naimeh Naseri

Naimeh Naseri
Sharif University of Technology | SHARIF · Department of Physics

PhD in Physics

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51
Publications
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1,574
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Publications

Publications (51)
Article
Full-text available
Preparation of the defective TiO2 nanoparticles (NPs) have been recently in particular interest for its outstanding application in visible active photocatalysts. To apply the TiO2 as a visible light active photocatalyst, band gap modifications should be carried out especially via introducing structural defects like oxygen vacancies as an effective...
Article
Although hematite (i.e., α-Fe 2 O 3 ) has been widely investigated in photoelectrochemical water oxidation studies due to its high theoretical photocurrent density, it still suffers from serious surface charge recombination and low...
Article
The necessity of research in food and nutrition and the emergence of diabetes mellitus call for fast and efficient glucose detection. Here, series of highly sensitive non-enzymatic photoelectrochemical glucose sensor based on engineered titanium dioxide nanotube arrays has been synthesized using a simple electrochemical approach to tune nanotubes m...
Article
In the present research, we investigate the synergistic effects of Ru-doping and Ar/H2 reduction treatment on the PEC water splitting performance and hydrogen evolution rate of TiO2 nanotube arrays photoelectrodes. The Ti-Ru alloy with 0.2 at% Ru was used to grow anodic self-organized Ru-doped TiO2 nanotube layers. An ideal synergy between Ar/H2 re...
Article
Hematite is recognized as a promising photoanode for photoelectrochemical water oxidation to produce solar hydrogen due to its favorable properties. However, the high charge carrier recombination rate due to low electrical conductivity and sluggish oxygen reduction kinetics of pure hematite hinder its photocatalytic activity. This work proposed a n...
Article
Inkjet printing (IJP) technology is recognized as a significant breakthrough in manufacturing high-performance electrochemical energy storage systems. In comparison to conventional fabrication protocols, this printing technique offers various advantages, such as contact-less high-resolution patterning capability, low-cost, controlled material deposi...
Article
Full-text available
In this research, the effect of alkali metal cations including Li, Na and Cs in hydrothermal solution is investigated on the morphology, stability, and photoactivity of nanostructured TiO 2 nanoflakes as a photoanode. The TiO 2 nanoflakes are formed through hydrothermal treatment of Ti foil in 1.0 M LiOH, NaOH or CsOH at 100 °C for 3h. By subsequen...
Article
Full-text available
A new synergetic hybrid Ag/ZnO nanostructure was fabricated which is able to cause photocatalytic degradation (in high yields) of methylene blue under visible light as well as in the dark. In this nanostructure, ZnO was synthesized using the arc discharge method in water and was coupled with Ag via a chemical reduction method. X-ray photoelectron s...
Article
Supercapacitors store charge by ion adsorption or fast redox reactions on the surface of porous materials. One of the bottlenecks in this field is how to develop biocompatible and high‐rate supercapacitor devices using scalable fabrication processes. We report Ti‐rich anatase TiO₂ material concept to address the above‐mentioned challenges. Tubular...
Article
Ag-functionalized CuWO4/WO3 heterostructures were successfully prepared via a polyvinyl pyrrolidone (PVP)-assisted sol-gel (PSG) route. Thin films prepared by electrophoretic deposition were used as photoanodes for photoelectrochemical (PEC) water splitting. Compared to pristine CuWO4 and WO3 films, a significant enhancement of the photocurrent (3-...
Article
TiO2 nanotube arrays (TNA) have been modified by cobalt phosphate (CoPi) through potentiostatic electrodeposition method. Different samples have been prepared by changing the loaded CoPi through the deposition time from 10 to 960 min. Formed catalytic materials have been characterized by different methods. Although charge transfer resistance of the...
Article
Hydrogen (H2) production via solar water splitting is one of the most ideal strategies for providing sustainable fuel because this requires only water and sunlight. In achieving high-yield production of hydrogen as a recyclable energy carrier, the nanoscale design of semiconductor (SC) materials plays a pivotal role in both photoelectrochemical (PE...
Article
Effective utilization of solar energy is an urgent global issue for solving current environmental problems and the energy crisis. A challenging issue in water splitting for solar fuel production is developing high performance and scalable photo/electro catalysts using low cost approach. Here, CoOx nanostructures were grown on anodized TiO2 nanotube...
Article
Highly porous nanocomposites of graphitic-carbon nitride and tin oxide (g-C 3 N 4 /SnO 2) were prepared through simple pyrolysis of urea molecules under microwave irradiation. The initial amount of tin was varied in order to investigate the effect of SnO 2 content on preparation and properties of the composites. The synthesized nanocomposites were...
Article
Synthesis of colloidal metal oxides with controllable size and morphology is burgeoning field of research in nanoscience. Low band gap gray Zn/ZnO colloidal nanoparticles were fabricated by plasma-liquid interaction of DC arc discharge in water. Scanning electron microscopy, X-ray diffraction and UV–vis spectroscopy were employed for morphology, cr...
Article
Bead-chain-like ZnO nanoparticles (NPs) formed in colloidal solution from oriented attachment (OA) of spherical nanoparticles. Arc discharge in liquid is a cost-effective method for quick mass production of nanostructured materials without considerable environmental footprints. Applying voltage across two zinc rods as electrodes, which were immerse...
Article
Developing low-cost, scalable and reproducible synthesis methods for water oxidation reaction (WOR) catalysts is highly desirable and also challenging in energy, environmental and industrial applications. In this context, electrochemical deposition is known as an easy and cost-effective technique in nanomaterial growth. Herein, cobalt-based nanofla...
Article
To overcome recent energy and environment challenges, developing efficient and low cost photocatalysts are unavoidable. In this context, design of semiconductor nanostructures modified with earth abundant co-catalysts for water splitting reactions requires well engineered and controlled process to optimize surface interface and maximize nanocomposi...
Article
Full-text available
Correction for ‘Multi-porous Co3O4 nanoflakes@sponge-like few-layer partially reduced graphene oxide hybrids: towards highly stable asymmetric supercapacitors’ by Mohammad Qorbani et al., J. Mater. Chem. A, 2017, DOI: 10.1039/c7ta00694b.
Article
The controlled growth of metal oxide nanostructures within hierarchically porous conductive carbon-based frameworks are critically important to achieving high volumetric performance and appropriate channel size for energy storage applications. In here, we grow cobalt oxide (Co3O4) nanoflakes, using sequential-electrodeposition process, into the sph...
Article
Full-text available
Nowadays, fossil fuel limitations and environmental concerns push researchers to find clean and renewable energy resources. Solar hydrogen production via water splitting reactions in electrochemical and/or photo-electrochemical systems has been accepted as a promising route and efficient electrocatalysts are involved in both. Here, cobalt nanoflake...
Article
Providing solar hydrogen as a clean energy resource is one of the human challenges for future. Controlling oxygen vacancies as well as surface morphology in metal oxide semiconductors enables developing PEC H2 production in some understood ways. Here, the influence of simple change in annealing atmosphere, air and pure oxygen, on photoresponse of n...
Article
Iron(III) oxide (Hematite, Fe2O3) nanofibers, as visible light induced photoanode for water oxidation reaction of a water splitting process, were fabricated through electrospinning method followed by calcination treatment. The prepared samples were characterized with scanning electron microscopy (SEM), and three-electrode galvanostat/potentiostat f...
Article
A series of reduced graphene oxide/ZnxCd1-xS (RGO/ZnxCd1-xS) nanocomposites (0<x<1) with different ratios of Zn/Cd were synthesized via facile hydrothermal route under the optimized experimental conditions and were carefully characterized by various techniques. Because very little is known about the morphology, specific surface area, and crystal ph...
Article
Energy and environment crises motivated scientists to develop sustainable, renewable, and clean energy resources mainly based on solar hydrogen. For this purpose, one main challenge is the low cost flexible substrates for designing earth abundant efficient cocatalysts to reduce required water oxidation overpotential. Here, a systematic morphologica...
Article
This paper analyses three-dimensional (3-D) surface texture of Co/CP/X (X= Cu, Ti, SM and Ni, CP: carbonaceous paste) nanoflakes prepared electrochemically using a conventional three electrode system. Surface chemical composition of the samples was investigated by X-ray photoelectron spectroscopy (XPS). Surface images were recorded using scanning e...
Article
In this research, facile and low cost synthesis methods, electrodeposition at constant current density and anodization at various applied voltages, were used to produce hierarchical cobalt oxide/hydroxide nanoflakes on top of porous anodized cobalt layer. The maximum electrochemical capacitance of 601 mF cm-2 at scan rate of 2 mV s-1 was achieved f...
Article
Today, regarding limitation and environmental side effects of fossil fuel resources, solar hydrogen production is one of the main interests in the energy research area. Visible sensitizing semiconductors based on non toxic, low cost and available bio-species is an ongoing approach for H2 generation based on water splitting reactions. Here, two diff...
Article
Considering hydrogen as a future fuel, development of clean energy sources based on solar power is the main human challenge in recent years. Here, for the first time, Au:WO3 photoanodes are synthesized with different Au concentrations and then applied for photoelectrochemical (PEC) water splitting. A comprehensive statistical study on the prepared...
Article
Considering hydrogen as a future fuel, development of clean approaches based on solar energy conversion is the main human challenge. Here, for the first time, TiO2 photoanodes are decorated with Au-Ag alloy nanoparticles for efficient photoelecrochemical water splitting. The photoanodes are synthesized using one step co-sputtering method. Single su...
Article
Free-standing TiO2 nanotube array (TNA) films were fabricated via two-step anodization of a titanium sheet. The X-ray diffraction pattern indicated amorphous TNAs were transformed into anatase after annealing the films at 500 �C in air. The surface of TNA was modified by a sequential-chemical bath deposition (S-CBD) method to fabricate Ag2S nanopar...
Article
The Multi-walled carbon nanotube (MWCNT)/WO3 nanocomposite thin films with different MWCNT’s weight percentages were prepared by sol–gel method as visible light induced photoanode in water splitting reaction. Weight percentage of MWCNT in the all nanocomposite thin films was confirmed by TGA/DSC analysis. According to XPS analysis, oxygenated group...
Article
The Multi-walled carbon nanotube (MWCNT)/WO3 nanocomposite thin films with different MWCNT’s weight percentages were prepared by sol–gel method as visible light induced photoanode in water splitting reaction. Weight percentage of MWCNT in the all nanocomposite thin films was confirmed by TGA/DSC analysis. According to XPS analysis, oxygenated group...
Article
WO3 thin film photoanodes containing different concentrations of Ag nanoparticles were synthesized by sol–gel method. Based on UV-visible spectra, presence of a surface plasmon resonance peak at 470 nm of wavelength indicated formation of silver nanoparticles in the WO3 films. According to atomic force microscopy (AFM) analysis, the highest value f...
Article
TiO2 thin films containing different concentrations of Ag nanoparticles have been synthesized by sol-gel method. According to UV–visible spectra, presence of an intense surface plasmon resonance peak at 490 nm of wavelength indicated formation of silver nanoparticles in the TiO2 films. Based on atomic force microscopy (AFM) analysis, the surface ro...
Article
WO3 thin films were fabricated by sol–gel method using polyethylene glycol (PEG) as dispersing agent. Physical and photoelectrochemical properties of the synthesized nanocrystalline films were studied by varying weight ratio of PEG to tungsten precursor (x). Based on AFM observations and statistical modeling of the WO3 surface, the thickness of the...
Article
TiO2/ZnO and ZnO/TiO2 nanolayer thin films were synthesized using sol–gel method. Optical analysis revealed high transmittance of the films in the visible range with almost the same bandgap energy for the both systems. XPS technique shows stoichiometric formation of TiO2 and ZnO on the surface of TiO2/ZnO and ZnO/TiO2 layers, respectively. Accordin...
Article
In this study, the effects of TiO2 addition on the physical and photoelectrochemical properties of ZnO thin films have been investigated. The (TiO2)x–(ZnO)1−x nanocomposite thin films were dip-coated on both glass and indium tin oxide (ITO)-coated conducting glass substrates with various values of x, specifically 0, 0.05, 0.1, 0.25 and 0.5. Optical...
Article
The physical and photoelectrochemical properties of the anodized ZnO-TiO(2) thin films were investigated in this study. Impedance spectroscopy revealed a decrease in charge transfer resistance and Tafel plots determined enhancement of about 200 times in the exchange current (i(0)) after anodization at high positive potential. It was found from XPS...
Article
Full-text available
In this study, pure TiO2 and Au:TiO2 nanocomposite thin films are both synthesized using sol–gel and RF reactive co-sputtering methods. Physical and photoelectrochemical properties of the thin films deposited by each method are compared. The optical density spectra and scanning electron microscopy images of the Au:TiO2 films reveal formation of gol...
Article
In this investigation, the effect of annealing temperature and concentration of gold nanoparticles on the photoelectrochemical properties of sol–gel deposited Au : TiO2 nanocomposite thin films is studied. Various gold concentrations have been added to the TiO2 thin films and their properties are compared. All the deposited samples are annealed at...
Article
In this investigation, the effect of gold nanocrystals on the electrochromical properties of sol–gel Au doped WO3 thin films has been studied. The Au–WO3 thin films were dip-coated on both glass and indium tin oxide coated conducting glass substrates with various gold concentrations of 0, 3.2 and 6.4mol%. Optical properties of the samples were stud...
Article
WO3–SiO2 compound thin films were deposited on glass substrates using the sol–gel method, and then all the samples were dried at 100 °C and annealed at 400 °C in air. The effect of WO3 concentration on the hydrophilicity of WO3–SiO2 compound films was studied for the first time and it was shown that the films containing 85 mol% of the concentration...
Article
The influence of annealing temperature on the hydrophilic property of WO3 thin films deposited by thermal evaporation and sol-gel dip-coating methods was studied and compared for the first time. The thermal evaporated WO3 thin films annealed at 400 °C showed a nearly super-hydrophilic property without UV and visible illumination. By analysing the O...

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Projects (6)
Project
we are working on synthesis and photocatalytic properties of ZnO as my thesis. In this project, my purpose is to enhance photocatalytic activity of ZnO with plasmonic nanostructures.