Titanium dioxide (TiO2) is one of the most common photocatalysts. In this study, TiO2-vermiculite composite nanofibers with a mesh structure and a diameter of approximately 300 nm were prepared via sol-gel approach combined with electrospinning technique. The samples were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible spectroscopy, etc. The photocatalytic ...

Libby, Montana is the site of a large vermiculite deposit that was mined between 1920 and 1990 to extract vermiculite for commercial applications such as insulation, gardening products, and construction materials. The Libby vermiculite deposit also contains amphibole minerals including tremolite, actinolite, richterite, and winchite. Historically, Libby mine workers experienced high exposures t...

Natural vermiculite, used as layered catalyst support, was modified with different chemical methods, such acid treatment, introducing into Na + and organic modification. The vermiculite-based catalysts were characterized by SEM, BET XRD respect to their images, textures structures. SEM results presented big pieced of lamellate vermiculite which had complete structure piled tightly, the expansio...

Removal of cesium from synthetic aqueous solution through adsorption on vermiculite, under batch equilibrium experimental condition at six initial values of pH (3, 4, 6, 9, 11 and 12) and five temperatures (25, 50, 75, 85 and 95 °C) has been investigated. It is necessary to propose a suitable model for a better understanding of the mecha...

Given the potential of acid-activated clays in adsorptive and catalytic processes, several studies focusing on acid matrices have grown over years, making it possible to study vermiculite, a mineral composed type 2:1 unit cell with tetrahedral octahedral sheets. Therefore, this work aimed vermiculite treated acids for production matrices. In work, treatment natural vermiculite-hydrobiotite, nit...

The synthesis characterization and conductivities of polyaniline/expanded vermiculite intercalated nanocomposite are presented in this paper. The conductive emeraldine salt form of polyaniline is inserted into the interlayer of expanded vermiculite to produce the nanocomposite with high conductivity. The structures and properties are characterized by transmission electron microscopy x-ray diffr...

A SOT.U~ON containing fluoride (0.4 N NH4F, 0.1 br HC1, ~ NH4C1), pcrmi~ the concentration of dioctahedral mica end dioctahedral vermiculite in mixed clay systems. AUophane, haUoysite, kaolinite, and in particular, Mg-rich montmorfllonite, biotite, and vermiculite of clay size, are destroyed in 24-48 hr at room temperature. A salt-free, NH4-saturated sample, weighing 80 mg, is shaken in 80 ml o...