Effects of Lizardite Addition on Technological Properties of Forsterite-monticellite Rich Ceramics Prepared from Natural Magnesite and Dolomite

Lizardite rich peridotite has never been used to prepare ceramic specimens, especially in Morocco. For this raison, potential use of naturally abundant lazirditic material from the Rif domain, as a supply for ceramic industry, has been evaluated. The effects of lizardite addition to magnesite and dolomite mixtures on the thermomechanical properties of the calcined ceramics were also detailed. To achieve this target, natural lizardite, magnesite and dolomite samples were collected in ultrabasic Beni Bousra massif. Those raw samples were used for the synthesis of a forsterite-monticellite rich ceramics. Both raw and sintered samples were characterized by x-ray diffraction, scanning electron microscope and fourier transform infrared. The obtained results showed that both magnesite and dolomite were mainly composed of MgCO3 and CaCO3. In contrast, lizardite sample showed high amounts of SiO2, MgO and Fe2O3. An increased amount of lizardite in the initial mixtures enhanced mechanical and dimensional properties of the prepared ceramic specimens, and subsequently, the production of ceramics with the required technological properties. Thus, the preparation of Moroccan lizardite-based ceramics is technically feasible, economically justifiable and socially desirable due to the contribution to the economic growth of the raw materials sector, especially ceramic industry

Effect of physicochemical parameters on magnetic treatment of water

The main objective of this work is to offer a new knowledge of the water magnetism phenomenon, indeed the present study focused on the search of the most decisive parameters, which influence the process of magnetization of water. The main parameters studied in the present paper are the temperature, the salinity, the pH and the linear flow speed of the water. The increases of temperature, water velocity or salinity extend the magnetization time, however the variation of pH does not have any influence. The outcomes of this work will be very helpful for engineers in agriculture and other industrial fields to a better use of magnetized water (MW)

Complete characterization of Berrechid clays (Morocco) and manufacturing of new ceramic using minimal amounts of feldspars: Economic implication

This work proposes the mixing of two varieties of Moroccan clay (C1 and C2) with silica sand in order to minimize the amount of the feldspar used. The raw materials were previously characterized in terms of their composition and thermal behavior. Two formulations noted M1 and M2 were elaborated according to the experimental protocol and they were evaluated in terms of their mechanical and thermal characteristics. The addition of C2 clay in the formulation allows a reduction in the amounts of feldspar of the order of 5%, while improving the technological characteristics of this new ceramic (M2) compared to that obtained by the conventional formulation. Indeed, the obtained ceramic (M2) shows the following characteristics: porosity (11.65%); density (2.71 g/cm3); shrinkage (4.91%); flexural strength (30.05 N mm−2) and thermal conductivity (2.73 W/mK). Results of this study permit a reduction in the amount of the feldspar used, a relatively expensive raw material, and consequently reduces the cost of ceramics

TiO₂ Based Nanomaterials and Their Application as Anode for Rechargeable Lithium-Ion Batteries

Titanium dioxide- (TiO2-) based nanomaterials have been widely adopted as active materials for photocatalysis, sensors, solar cells, and for energy storage and conversion devices, especially rechargeable lithium-ion batteries (LIBs), due to their excellent structural and cycling stability, high discharge voltage plateau (more than 1.7 V versus Li+/Li), high safety, environmental friendliness, and low cost. However, due to their relatively low theoretical capacity and electrical conductivity, their use in practical applications, i.e. anode materials for LIBs, is limited. Several strategies have been developed to improve the conductivity, the capacity, the cycling stability, and the rate capability of TiO2-based materials such as designing different nanostructures (1D, 2D, and 3D), Coating or combining TiO2 with carbonaceous materials, and selective doping with mono and heteroatoms. This chapter is devoted to the development of a simple and cost-efficient strategies for the preparation of TiO2 nanoparticles as anode material for lithium ion batteries (LIBs). These strategies consist of using the Sol–Gel method, with a sodium alginate biopolymer as a templating agent and studying the influence of calcination temperature and phosphorus doping on the structural, the morphological and the textural properties of TiO2 material. Moreover, the synthetized materials were tested electrochemically as anode material for lithium ion battery. TiO2 electrodes calcined at 300°C and 450°C have delivered a reversible capacity of 266 mAh g−1, 275 mAh g−1 with coulombic efficiencies of 70%, 75% during the first cycle under C/10 current rate, respectively. Besides, the phosphorus doped TiO2 electrodes were presented excellent lithium storage properties compared to the non-doped electrodes which can be attributed to the beneficial role of phosphorus doping to inhibit the growth of TiO2 nanoparticles during the synthesis process and provide a high electronic conductivity

International Renewable and Sustainable Energy Conference IRSEC

A green and friendly synthesis method was used to prepare Anatase TiO2 and the electrochemical performances of this metal oxide as negative electrode for lithium ion batteries were studied. X-Ray diffraction analysis confirm the formation of Titanium Oxide with anatase type structure with a small content of brookite phase. The spherical shape of the particles is clearly highlighted using Scanning Electron Microscopy. The prepared TiO2 electrode delivers a discharge capacity of 290 mAh g(-1) in the first cycle under C/10 current rate. Indeed, a coulombic efficiency higher than 95 and a capacity retention of 85% is obtained after 100 cycles

Facile synthesis of nanoparticles titanium oxide as high-capacity and high-capability electrode for lithium-ion batteries

Anatase TiO2 is prepared via a facile and eco-friendly synthesis method where titanium tetra isopropoxide and sodium alginate are used as the titanium precursor and templating agent, respectively. Structural characterization of the prepared sample via X-ray diffraction and Raman spectroscopies confirm the formation of nanoparticles Titanium Oxide with anatase type structure without impurities. Further morphological characterization of the material showed the spherical shape of the particles. The prepared TiO2 has been studied as an anode material for lithium-ion batteries. TiO2 electrodes have delivered a reversible capacity of 266 mAh g(-1), 275 mAh g(-1) with coulombic efficiencies of 70%, 75% during the first cycle under C/10 current rate for TiO2 calcined at 300 degrees C and 450 degrees C, respectively. The activity of Ti4+/Ti3+ redox couple during the lithiation/delithiation process was evidenced using X-ray Photoelectron Spectrometry. The high capacity retention was maintained for 100 cycles. The prepared nanoparticles TiO2 has prodigious potential for large scale production of anode materials for lithium-ion batteries