The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
New pyrophosphate of ceramic compounds LiNa3-xAgxP2O7 (x = 0.2 and 0.6) is synthesized by a solid-state method. All the compounds crystallize in the orthorhombic lattice with space group C2221. The infrared spectra of these compounds show characteristic bands due to a P2O7 group. The two semicircles observed in the complex impedance identify the presence of the grain interior and grain boundary contributions...
For over two decades, the high-temperature phase transition (HTPT) at around Tp = 180 °C on KH2PO4 (KDP), which involves an ionic conductivity increase, constitutes a controversial subject; while most authors ratify a physical transformation (tetragonal → monoclinic phase transition), others defend the chemical transformation. A careful high-temperature phase behavior examination of this acid salt...
This paper describes the synthesis of nanoporous AuPt nanoparticles (np-AuPt NPs) by galvanic replacement reactions that involve large-sized silver nanoparticles (Ag NPs) electrodeposited upon an indium tin oxide (ITO) film glass as a sacrificial template. Compared to a previous synthetic route based on the formation and dealloying of Ag/Au alloy nanoparticles, this method can easily fabricate nanoporous...
In general, many attempts have been focused on enhancement of oxy-ion conductivity at intermediate temperature range in order to have a feasible operating temperature of solid oxide fuel cell (SOFC). Every effort is directed towards the creation of defect-rich structure so as to get either ion or vacancy movement, which, in turn, offers more ionic conductivity. Doping is one of the strategies where...
Cu-supported SnO2@C composite coatings constructed by interconnected carbon-based porous branches were fabricated by annealing Cu foils with films formed by knife coating DMF solution containing SnCl2, polyacrylonitrile (PAN), and poly(methyl methacrylate) (PMMA) on their surface in vacuum. The carbon-based porous branches consist of amorphous carbon matrices, SnO2 nanoparticles with a size of 30–100 nm...
Insufficient wetting of Na on Na-β”-alumina is responsible for an increased interfacial polarization in Na-batteries if the operating temperature is below 270–300 °C. In this study, Na alloys (Na–Sn, Na–Bi and Na–In) on the ceramic surface are examined on their capability to improve the wetting with molten sodium at medium temperatures and thereby enabling operation of the cell at temperatures in...
Here, we used waste mineral water bottles as carbon precursor and prepared carbon materials through direct carbonization. The effects of the carbonization temperature and carbonization time on the properties of the carbon materials were studied. The results indicate that the carbonization time in a certain range has no big influence on the properties of the carbon materials, whereas the carbonization...
Herein, porous hollow silica nanospheres were prepared via a facile sol-gel process in an inverse microemulsion, using self-assemblies of chiral amphiphile as a soft template and fine water droplets as a hard template. The shells of the hollow silica nanospheres are composed of flake-like nanoparticles with dense big holes on the surface. After covering a layer of sulfur on the silica nanospheres,...
The synthesis and crystal structure of the bis-(4-benzylpyridinium) tetrabromozincate(II) “(4-BP)2[ZnBr4]” salt are reported in the present paper. After an X-ray investigation, it has been shown that the title compound belongs to the centrosymmetric monoclinic system at 296 K, in the space group P21/n with the following lattice parameters a = 15.0764(8) Å, b = 22.5575(12) Å, c = 16.0739(9) Å, and...
In this work, we research two series of Mn-substituted bismuth molybdates: Bi26-2xMn2xMo10O69-d and Bi26Mo10-2yMn2yO69-d. The synthesis of powder samples is performed by the conventional solid state technology. Samples are characterized by X-ray diffraction, scanning electron microscopy, and chemical analysis methods, and it is shown that single phase Bi26-2xMn2xMo10O69-d and Bi26Mo10-2yMn2yO69-d...
Mn1.5Co1.5O4 hierarchical microspheres have been successfully synthesized via a solvothermal method and an annealing procedure. Mn1.5Co1.5O4 exhibits advanced cycling performance, and it retains a reversible capacity of 633 mA h g−1 at a current density of 400 mA g−1 with a coulombic efficiency of 99.0% after 220 cycles. Its remarkable performance is attributed to the hierarchical structure assembled...
In the present study, copper oxide thin films are deposited using modified successive ionic layer adsorption and reaction (modified SILAR) method on stainless steel (SS) substrates. These deposited CuO films are characterized by different characterization techniques such as X-ray diffraction (XRD). The XRD pattern reveals that CuO films exhibit polycrystalline phase with monoclinic structure which...
Solid polymer electrolytes based on methyl cellulose (MC)-potato starch (PS) blend doped with ammonium nitrate (NH4NO3) are prepared by solution cast technique. The interaction between the electrolyte’s materials is proven by Fourier transform infrared (FTIR) analysis. The thermal stability of the electrolytes is obtained from thermogravimetric analysis (TGA). The room temperature conductivity of...
Cr-doped sodium vanadium phosphate (NVP) in the form of Na3V2-xCrx(PO4)3 (x = 0, 0.02, 0.04, 0.08, 0.10) is synthesized via a facile sol-gel route as cathode materials for sodium ion batteries. The structure and morphology of these materials are systematically characterized by x-ray diffraction (XRD), Fourier-infrared spectra (FT-IR), and scanning electron microscope (SEM). XRD analysis reveals that...
Oligo(ethylene oxide)-functionalized trialkoxysilanes can be used as novel electrolytes for high-voltage cathode, such as LiCoO2 (4.35 V) and Li1.2Ni0.2Mn0.6O2 (4.6 V); however, they are not well compatible with graphite anode. In this study, a synergistic solid electrolyte interphase (SEI) film-forming effect between [3-[2-(2-methoxyethoxy)ethoxy]propyl]-trimethoxysilane (TMSM2) and propylene carbonate...
Polyaniline (PANI) nanowire electrode was successfully prepared using electrodeposition method. The morphology, thickness, and electrochemical performance of PANI electrode can be controlled by varying the deposition scan rates. Lower deposition scan rate results in compact and aggregates of PANI nanowire morphology. The uniform nanowire of PANI was obtained at the applied scan rate of 100 mV s−1,...
Supercapacitor is an important energy storage device. In this work, for the first time, oil (castor oil) is used instead of hazardous acids in the polymerization of aniline. This process yields polyaniline salt containing dual dopants, sulfuric acid, and castor oil. This castor oil is expected to interact with electrolyte in supercapacitor and thereby increases the electrochemical performance of supercapacitor...
The present work represents the mesoporous carbon-supported Pt–Sn and Pt–Sn–Ce catalysts with different mass ratios have been prepared by co-impregnation reduction method. The prepared catalysts were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) investigation. The XRD patterns of prepared Pt/MC (100) Pt–Sn/MC (75:25), Pt–Ce/MC (75:25), and Pt–Sn–Ce/MC (75:20:05)...
Graphene-based materials have exhibited high potential for applications in the field of energy generation and storage because of its high surface area and porosity. Herein, we present a facile strategy to assemble graphene/carbon nanotubes into well-dispersed three-dimensional sponge and subsequently cut nano-scale pores via nickel nanoparticles for enhancing anode’s performance in lithium-ion batteries...
A facile and effective strategy to fabricate non-enzymatic H2O2 sensor was developed based on Nafion/Platinum nanoparticles/reduced graphene oxide (Nafion/Pt NPs/RGO) nanocomposite modified glassy carbon (GC) electrode. The morphology of Nafion/Pt NPs/RGO nanocomposite was characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) analyzer, Fourier transform...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.