In this study, an effective low-temperature method was developed, for the first time, for the synthesis of bismuth titanate nanobelts by using Na2Ti3O7 nanobelts as the reactants and templates. The experimental procedure was based on ion substitution followed by a nanoscale solid-state reaction. In the first step, Na2Ti3O7 nanobelts were soaked in a bismuth nitrate solution where ion substituti...

Abstract Two tungstates containing platinum nanoparticles (Pt Npts) were obtained by air-calcining α-Keggin-type diplatinum(II)-coordinated polyoxotungstates, Cs 3 [α-PW 11 O 39 { cis -Pt(NH ) 2 } ]⋅8H ( Cs-P-Pt and 4 [α-SiW ]⋅11H Cs-Si-Pt ), at 700–900 °C for 5 h. The polyoxotungstate was transformed to a mixture of Pt Npts PW 12 40 upon calcination, while the structures W 35 . generated 700 h...

This work reports a novel in situ XRD analysis on the multicycle calcination/carbonation of natural limestone and dolomite at relevant conditions for thermochemical energy storage (TCES) concentrated solar power (CSP) plants. The experiments allow analysing noninvasively time evolution different phases involved Calcium Looping (CaL) process. Our has revealed new key features to understand progr...

It is generally assumed that limestone absorbs SO2 by a mechanism involving two consecutive steps, dissociation of the calcium carbonate followed by reaction of C.0 with sulfur dioxide. be important in any of the proposed pollution control processes. and especially in the dry injection process (Potter, 1968). Several investigators (Harrington, 1968, Potter, 1969) have determined the saturation ...

Titanium dioxide (TiO2) nanofibers with potential applications in the fabrication of dye sensitized solar cells, photocatalysts, gas sensors, and water treatment systems, among others, have been produced at large yield rates utilizing the Forcespinning (FS) technology. This study presents the results of research performed to determine optimal processing parameters to create TiO2 nanofibers at a...

Globally increased bivalve aquaculture production results in a vast amount of by-product discharges such as scallop shells. Utilization these wastes to produce new products antibacterial agents can cooperate reduce environmental problems and provide high value-added product at lower cost. In this study, shells are heat-treated 800°, 900°, 1000°, 1100°C for 4 hours atmospheric conditions. X-ray ...

Hydroxyapatite nanoscale particles (nHA) were prepared by wet chemical precipitation using four different synthesis methods. Differences in physico-chemical properties including morphology, particle-size, and crystallinity were investigated following alteration of critical processing parameters. The nanoparticles were also studied using X-ray diffraction (XRD), Fourier Transform infrared spectr...

The influence of experimental conditions on the formation of ZnO fibers by electrospinning has been investigated. The electrospinning of a viscous suspension containing polyvinylpyrrolidone and zinc acetate in C2H5OH/H2O produced very long fibers (several hundred μm). Upon calcination a thin deposit of precursor fibers at 400 or 500 °C for 1 h the fibers consisting of ZnO nanoparticles were obt...

Nano-structured lanthanum strontium cobalt ferrite, La0.6Sr0.4Co0.2Fe0.8O3 (LSCF), was successfully synthesized via co-precipitation method using metal nitrates as starting materials. Effects of precipitating agent and calcination temperature on the phase composition and morphology of synthesized powders were systematically studied using X-ray diffraction (XRD) and field emission scanning elect...