Preparation of TiO Nanorods@Ni-Foam for Photocatalytic Decomposition of Acetaldehyde-In Situ FTIR Surface Investigation.

TNR@Ni-foam structures were prepared by an alkaline hydrothermal method in an autoclave in a strongly alkaline medium (10 M NaOH) at 150 °C with further acid washing (0.1 M HNO) and a second hydrothermal treatment in an autoclave at 180 °C. Two TiO samples were used for preparation: anatase and P25 of mixed anatase and rutile phases.

Enhanced Degradation of Ethylene in Thermo-Photocatalytic Process Using TiO/Nickel Foam.

The photocatalytic decomposition of ethylene was performed under UV-LED irradiation in the presence of nanocrystalline TiO (anatase, 15 nm) supported on porous nickel foam. The process was conducted in a high-temperature chamber with regulated temperature from ambient to 125 °C, under a flow of reacted gas (ethylene in synthetic air, 50 ppm, flow rate of 20 mL/min), with simultaneous FTIR measurements of the sample surface. Ethylene was decomposed with a higher efficiency at elevated temperatures, with a maximum of 28% at 100-125 °C.

The Superiority of TiO Supported on Nickel Foam over Ni-Doped TiO in the Photothermal Decomposition of Acetaldehyde.

Acetaldehyde decomposition was performed under heating at a temperature range of 25-125 °C and UV irradiation on TiO doped by metallic Ni powder and TiO supported on nickel foam. The process was carried out in a high-temperature reaction chamber, "The Praying Mantis", with simultaneous in situ FTIR measurements and UV irradiation. Ni powder was added to TiO in the quantity of 0.

Fracture toughness of schist, amphibolite, and rhyolite from the Sanford Underground Research Facility (SURF), Lead, South Dakota.

The Cracked Chevron Notched Brazilian Disc (CCNBD) method was selected for Mode I fracture toughness tests on Poorman schist, Yates amphibolite, and rhyolite dikes from the EGS Collab site at the SURF in Lead, South Dakota. The effects of lithology, anisotropy, and loading rate were investigated. Fracture toughness was greatest in amphibolite, with schist and rhyolite having similar toughness values ([Formula: see text] > [Formula: see text] ≈ [Formula: see text]).

[Sorption kinetics of fluoride by artificial and natural hydroxyapatite].

The nature and kinetics of fluoride uptake by hydroxyapatite under various conditions remain the object of interest. This problem was now investigated with an experimental model reproducing as closely as possible the conditions in vivo. The aim of this work was: (1) to study the kinetics of fluoride uptake by natural and artificial hydroxyapatite depending on experimental conditions and to determine the reaction rate constants; (2) to describe the equilibrium of fluoride uptake with adsorption isotherms and develop a best fit mathematical model for the process taking place under various experimental conditions; (3) to determine and compare the capacity for fluoride uptake by natural and artificial hydroxyapatite depending on experimental conditions.