The purpose of this study is to report the findings on fresh, mechanical & microstructural properties an experimental investigation, which performed by varying percentages polyvinyl chloride (PVC) waste powder in attempt replace cement M40 grade concrete partially. While, preparing test specimens concrete, 8 % silica fume kept constant and PVC (PWP) was varied 0 (treated as control specimen), 5 %, 10 15 20 25 30 weight cement. A slump conducted investigate fresh concrete. At same time, like...

Real-time in situ Raman spectroscopy is used to probe the near-surface structure of α-Mn2O3 nanocrystals during methane combustion for first time. A surface phase-transformation from Mn3O4-like species, as evidenced by formation a single band at 648 cm-1, was observed only or above 400 °C presence pure He mixture O2 + CH4. This modification probably due loss lattice oxygen high temperatures that leads reconstruction. Very interestingly, reversible with decreasing temperature 25 °C. The...

In the present study synthesis of BaTi1–xCrxO3 nanocatalysts (x = 0.0 ≤ x 0.05) by conventional oxalate and microwave assisted hydrothermal methods was carried out to investigate effect on physicochemical catalytic properties nanocatalysts. These catalysts were thoroughly characterized X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), photoelectron (XPS), N2 physisortion, total acidity pyridine adsorption method. Their...

In this article, the SrFeO3−δ photocatalyst was synthesized by a solution combustion method and applied for photocatalytic degradation of aqueous nitrobenzene in presence absence H2O2. The characterized XRD, FT-IR, FE-SEM, TEM, TG-DTG, XPS, UV–visible spectroscopy. band gap energy found to be 3.75 eV which lies UV region. XPS results indicate that oxidation state Sr Fe 2+ 3+, respectively, surface atomic ratio is 0.995. activity reveals over catalyst itself (UV/SFO) superior compared H2O2...

A modified solution combustion approach was applied in the synthesis of nanosize SrFeO(3-δ) (SFO) using single as well mixture citric acid, oxalic and glycine fuels with corresponding metal nitrates precursors. The synthesized calcined powders were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis derivative (TG-DTG), scanning electron microscopy, transmission N2 physisorption methods, acidic strength n-butyl amine titration...

The present study deals with the synthesis of SrTiO3 (STO) nanocatalysts by conventional oxalate and microwave-assisted hydrothermal methods. Thorough characterization synthesized has been done using various techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy, N2 physisorption, transmission electron microscopy, total acidity pyridine adsorption method, acidic strength n-butylamine potentiometric titration, respectively. Structural parameters were estimated...

Highly active and selective Fe, Co Ni doped BaTiO₃ catalysts for catalytic reduction of nitrobenzene to azoxybenzene was reported.

The adsorption of NO and CO was studied on an alumina-supported palladium catalyst by in situdiffuse reflectance infrared spectroscopy (DRIFTS). temperature range 50–160 °C a wide variety partial pressures used. band-target entropy minimization (BTEM) algorithm applied to the DRIFTS data sets resulting pure component spectra numerous species adsorbed both Pd (primarily Pd–CO Pd–NO species, various oxidation states coordinations) alumina surface (i.e. nitrates, nitrites, carbonates,...

Abstract In the present study, SrTiO 3 (STO) was synthesized using oxalate method. A series of V 2 O 5 nanoparticles supported on (V / STO) with vanadia content ranging from 0.5 to wt. % by wet impregnation Physicochemical properties catalysts were determined X‐ray diffraction, Fourier transform infrared spectroscopy, Transmission electron microscopy, N physisorption and photoelectron spectroscopy acidity pyridine adsorption XPS studies reveal that vanadium is in +5 oxidation state. Particle...

The adsorption of NO and CO was studied on an alumina-supported platinum catalyst by in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS). temperature range 50–160 °C a wide variety partial pressures used. band-target entropy minimization (BTEM) algorithm applied to the DRIFTS data sets resulting pure component spectra numerous species adsorbed both Pt (primarily Pt0–CO Pt2+–CO species) alumina surface (i.e. nitrates, nitrites, bicarbonates, isocyanates) as well...

The solid-state reaction between ammonium heptamolybdate (AHM) and zirconium phosphate (ZrP) to give the salt of 12-molybdophosphoric acid (AMPA) was performed at 25-400 degrees C monitored using in situ Raman spectroscopy. Spectral analysis data band-target entropy minimization (BTEM) algorithm resulted spectral estimates for starting materials product, AHM, ZrP, AMPA, as well byproduct MoO3 an intermediate 11(NH4)2O.4(MoO3)7. time-dependent relative concentration profiles were obtained,...