Diatomite, a porous non-metal mineral, was used as support to prepare TiO2/diatomite composites by a modified sol-gel method. The as-prepared composites were calcined at temperatures ranging from 450 to 950 °C. The characterization tests included X-ray powder diffraction (XRD), scanning electron microscopy (SEM) with an energy-dispersive X-ray spectrometer (EDS), high-resolution transmission el...

Absolute ground state atomic hydrogen densities were measured, by the utilization of two-photon absorption laser induced fluorescence, in a low-pressure electron cyclotron resonance plasma as function nitrogen admixtures—0 to 5000 ppm. At admixtures 1500 ppm and higher, spectral distribution fluorescence changes from single Gaussian double distribution; this is due separate, nascent contributio...

A series of different M/TiO2 catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, tested for activity as photocatalysts the water gas shift reaction, WGSR, using continuous flow, phase reactor. For both thermal (dark) photocatalytic (UV irradiated) WGSR best catalyst/photocatalyst is Au/TiO2. The kinetics studied function reactor temperature, Au loading concentrations CO...

Abstract First‐principles computations are performed to investigate the catalytic oxidation of CO on a Ti‐decorated Cr 2 TiC O MXene monolayer, through comprehensive analysis charge transfer, electronic density states, and difference interacting systems. By comparing reaction energy barriers, it is found that, rather than traditional Langmuir–Hinshelwood, Eley–Rideal, Mars‐van Krevelen (MvK) me...

In this research, Carbon-doped TiO2 nano-photocatalyst is synthesized via sol-gel technique and photo-catalytic degradation of phenol has been studied under ultraviolet and visible light irradiation in a fluidized bed reactor. Various techniques are used to characterize TiO2 nano-photocatalyst such as X-Ray Diffraction, Fourier transform infrared spectroscopy,  Energy Disp...

Over the years, hydrotreating process has been considerably improved in order to facilitate production of environmentally friendly diesel fuels by reducing sulphur and aromatics concentrations, as mandated contemporary emissions regulations. In this study, different kinetic models for hydrodearomatisation reaction influence rate on performance industrial trickle bed reactor gas oil light cycle ...

The photo-catalytic degradation of a textile azo-dye as Methyl Orange was studied in an innovative unit constituted by channel over which layer titanium dioxide (TiO2) catalyst anatase form deposited and activated UVB irradiation. kinetics were followed after variation the chemical, physical, hydraulic/hydrodynamic parameters system. For this purpose, influence TiO2 dosage (g/cm3), dye concentr...

Methyl oleate, an example of a FAME (fatty acid methyl ester), was produced by oleic (OA) photoesterification with TiO2 and UVA light. Different parameters were evaluated optimised: catalyst pretreatment, temperature (25–65 °C), loading (1–30 % w/wOA) : alcohol molar ratio (1 3–1 55). Response surface quadratic methodology obtained central composite rotational design (RSM-CCRD) used to evaluate...

The oxidation kinetics of a-CHx overcoats during exposure to oxygen and water vapor have been measured using X-ray photoemission spectroscopy (XPS) in an apparatus that allows oxidation and analysis of freshly deposited a-CHx overcoats without prior exposure of the overcoats to air. The uptake of oxygen on the surfaces of the a-CHx overcoats has been measured at O2 and H2O pressures in the rang...

The activated carbon-supported TiO2 nanoparticles (TiO2/AC) were prepared by a properly controlled sol-gel method. The effects of activated carbons (AC) support on inactivated properties of TiO2 nanoparticles were evaluated by photocatalytic inactivation experiments of Escherichia coli. The key factors affecting the inactivation efficiency were investigated, including electric power of lamp, te...