In this study, ZnO/SiO2-clay heterostructures were successfully synthesized by a facile two-step process applied to two types of clays: montmorillonite layered silicate and sepiolite microfibrous clay mineral. In the first step, intermediate silica-organoclay hybrid heterostructures were prepared following a colloidal route based on the controlled hydrolysis of tetramethoxysilane in the presenc...

The study focussed on stabilizing potential of ash obtained from calcination of cattle bones from slaughter house in Ibadan. Cattle bones obtained were burnt in an open air. The residue was fed into furnace at about 1100 o C for four hours, allowed to cool, milled and sieved with sieve of aperture 75 micro metre to obtain bone ash (BA). The bone ash (BA) was used to stabilize four soil samples ...

The presence of arsenic in water supplies is a major problem for public health and still concerns large parts of population in Southeast Asia, Latin America and Europe. Removal of arsenic is usually accomplished either by coagulation with iron salts or by adsorption with iron oxides or activated alumina. However, these materials, although very efficient for arsenic, normally do not remove other...

Formation of vanadia species during the calcination of ball milled mixture of V2O5 with TiO2 was studied by Raman spectroscopy in situ and at ambient conditions. It is found that calcination in air leads to fast (1–3 h) spreading of vanadia over TiO2 followed by a slower process leading to the formation of a monolayer vanadia. The calcinated catalyst showed higher activity during toluene oxidat...

Cobalt oxide [Co3O4] anode materials were synthesized by a simple hydrothermal process, and the reaction conditions were optimized to provide good electrochemical properties. The effect of various synthetic reaction and heat treatment conditions on the structure and electrochemical properties of Co3O4 powder was also studied. Physical characterizations of Co3O4 are investigated by X-ray diffrac...

Considering the BSSF steelmaking slag generated in a Brazilian steelwork, it would be worth to separate iron and calcium from it, with objective of increasing its content, or producing Fe2O3 CaO by selective precipitation cations aqueous solution. In this way, materials could produced used in-house, e.g., sintering plant. This possibility was explored through acid leaching for an industrial sam...

In this work, naturally available moringa oleifera leaves are chosen as a heterogeneous catalyst for biodiesel production from palm oil. The dry calcinated up to 700 °C 3 hours improve their adsorbing property. characterization analysis XRD and EDX highlights the presence of calcium, potassium, other elements. Response surface method (RSM) optimization artificial neural network (ANN) modeling w...

Palm oil wastewater treatment was investigated via a filtration process using raw and calcinated limestone. Column studies were conducted different limestone sizes (4, 12, 20 mm), calcination temperature (800 °C 600 °C) various rates (20, 60, 100 mL/min), comparison made with under similar conditions. The response surface methodology central composite design employed to optimize the parameter. ...

Nano hexagonal wurtzite ZnO has been prepared on zeoliteA by the sono-chemical method. The zeoliteA was mixed into Zinc gel, after stirring for two days, the mixture was irradiated 30 min by ultrasonic probe. The filtrated composite gel was calcinated at 500°C for 3h in furnace. The produced composite was characterized using X-ray diffraction, FT-IR spectroscopy and field emission scanning elec...