Enhanced adsorption capacity of porous titanium dioxide nanoparticles synthetized in alkaline sol

Abstract

In recent years, the exploitation of natural resources and industrial development have led to the production of harmful pollutants. Much of these contaminants end up in water resources, reducing the availability of drinking water. Therefore, it is necessary to find remedies to this situation. Solutions could be the adsorption or the degradation through photocatalysis of these compounds. A good candidate for this task is titanium dioxide (TiO2), due to its non-toxicity, stability and low cost. In this work, we propose a novel synthesis of TiO2 nanoparticles (NPs), with high adsorption capacity, produced at low temperature in alkaline environment. Adsorption tests were conducted using methylene blue and diclofenac as model pollutants. Moreover, the obtained NPs have been characterized through Raman spectroscopy, Scanning and Transmission electron microscopies and with thermogravimetric analysis. The results showed a porous structure with a high surface area, able to efficiently adsorb large amounts of dye from the aqueous solution. These properties make the obtained TiO2 powders suitable for applications devoted to the adsorption and recovery of harmful compounds. Graphic abstract

Photocatalytic Degradation of Methylene Blue under Visible Light Using TiO2 Thin Films Impregnated with Porphyrin and Anderson-Type Polyoxometalates (Cu and Zn)

“…In the particular case of the TCPP/ZnPOM/TiO2 film, a R 2 of 0,9678 was obtained for the pseudo-first order model, indicating that, besides the chemisorption, there is also a physisorption involved due to the electrostatic attraction of the involved species. Finally, our results agree with other studies where the nonmodified TiO2 film fitted the pseudo-second order model [62].…”

High anisotropic magnetoresistance, perfect spin-filtering effect, and negative differential resistance effect of Cr-doped anatase phase TiO2

“…Titania (TiO 2 ) is one of the most important transition metal oxides. It has been widely used in industrial applications due to its excellent stability, chemical inertia, low cost, and non-toxicity [1][2][3]. Such as gas sensors [4], dye-sensitized solar cells [5], and photocatalysts based on TiO 2 in nanocluster form [6,7] et al There are three common polymorphs of TiO 2 in nature: rutile, anatase, and brookite [8,9], of which anatase phase TiO 2 has received more attention due to its unique optical, chemical properties, and strong anisotropy [10].…”

Efficient Removal of Tetracycline and Bisphenol A from Water with a New Hybrid Clay/TiO2 Composite

“…Recently, the application of titania (TiO 2 ) nanoparticles (NPs) has attracted remarkable attention in several fields like biotechnology, − air treatment, , water splitting for hydrogen production, , food and cosmetics, , and wastewater treatment. , Titania is inexpensive, chemically stable, nontoxic, and moderately hydrophobic under most conditions . Most previous studies have primarily focused on the photocatalytic properties of TiO 2 NPs, while research into TiO 2 adsorption properties is comparatively rare.…”