Crystalline orthorhombic Bi2WO6 powders were synthesized by a hydrothermal method from aqueous solutions of Bi(NO3)3 5H2O and Na2WO4 2H2O over a range of three selected pH values (2.0, 5.0 and 7.0), using NaOH as precipitating agent. The as-prepared catalysts were char- acterized by XRD, BET, FE-SEM, TEM, XPS and UV-vis spectroscopy. The effect...
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November 25, 2021 (v1)PublicationUploaded on: March 27, 2023
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February 27, 2015 (v1)Publication
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Uploaded on: March 27, 2023 -
November 27, 2014 (v1)Publication
Se obtuvo dióxido de titanio por medio de una nueva ruta de síntesis que combina la técnica solgel con reacción a presión autógena. Se ensayaron dos geles de síntesis con diferentes fuentes de titanio; una de ellas usó tetraisopropil ortotitanato empleando agua e isopropanol como estructurantes en diversas proporciones, obteniéndose en todos...
Uploaded on: March 27, 2023 -
September 6, 2022 (v1)Publication
Sistemas Óxido de Titanio/Óxido de Silicio (TiO2/SiO2) fueron obtenidos por anclaje de TiO2 en SiO2. El fotocatalizador TiO2 se obtuvo por alcohólisis del TiCl4 con 2-propanol y posterior cristalización a presión autógena a 200 °C, excluyendo etapas de calcinación a altas temperaturas. Se emplearon diferentes relaciones SiO2/TiCl4 para...
Uploaded on: March 24, 2023 -
June 15, 2023 (v1)Publication
AgBr/NaTaO3 composites, with diferent molar % of NaTaO3 (Br/NTO(X%)), have been synthesized by simple precipitation methods; bare NaTaO3 was synthesized by hydrothermal procedure, while AgBr was synthesized by a precipitation procedure using cetyl-tri-methyl-ammonium bromide (CTAB) and AgNO3. Samples have been characterized by X-ray diffraction...
Uploaded on: June 16, 2023 -
February 12, 2019 (v1)Publication
A comparative study of the photodeposition of Pt, Au and Pd under the same experimental conditions onto pre-sulphated and non-sulphated TiO2 was performed. Morphological and surface characterisation of the samples as well as photocatalytic activity for phenol photooxidation was studied. The influence of sulphate pre-treatment on the deposits...
Uploaded on: December 4, 2022 -
October 6, 2022 (v1)Publication
In this work, a new photocatalyst based on bismuth titanates with outstanding visible photocatalytic activity was prepared by a facile hydrothermal method. The synthesised material showed visible activity as high as UV activity of commercial TiO2 P25 under the same experimental conditions for phenol degradation. A wide characterisation of the...
Uploaded on: December 5, 2022 -
November 29, 2023 (v1)Publication
Procedimiento para la obtención de polvos nanométricos de óxido de circonio con modificación de su superficie específica y estructura tetragonal estable. El procedimiento está basado en la formación inicial de un sol por hidrólisis a partir de una disolución de cloruro de circonilo y amoniaco en medio acuoso, que posteriormente evoluciona a un...
Uploaded on: December 3, 2023 -
March 22, 2018 (v1)Publication
TiO2 nanoparticles have been prepared by amine assisted sol–gel precipitation of Ti4+ aqueous solutions and further hydrothermal treatment. The effect of different starting acidic solution (nitric, chlorhydric and acetic acids) as well as the addition of triethylamine (TEA) at different pH has been widely investigated. It has been stated that...
Uploaded on: December 4, 2022 -
February 1, 2019 (v1)Publication
Two different catalysts consisting of Pt/TiO2 and Pd/TiO 2 were submitted to diverse oxidative and reductive calcination treatments and tested for photocatalytic reforming of glucose water solution (as a model of biomass component) in H2 production. Oxidation and reduction at 850°C resulted in better photocatalysts for hydrogen production than...
Uploaded on: December 4, 2022 -
October 14, 2022 (v1)Publication
In this work, the optimization of Ni amount on LaFeO3 photocatalyst was studied in the photocatalytic molecular hydrogen production from glucose aqueous solution under UV light irradiation. LaFeO3 was synthesized via solution combustion synthesis and different amount of Ni were dispersed on LaFeO3 surface through deposition method in aqueous...
Uploaded on: March 24, 2023 -
October 5, 2018 (v1)Publication
Surface fluorinated TiO2 materials with high {001} facet exposure were prepared by a simple and high yield preparation procedure. Faceted/fluorinated samples showed a high photocatalytic performance not only in oxidation processes, tested inphenol and Methyl Orange degradation, but also in a reduction process as Cr(VI) photoreduction. Reaction...
Uploaded on: December 4, 2022 -
November 13, 2018 (v1)Publication
Mixed oxides, α-Fe2O3/Bi2WO6, were prepared using a mechanical mixing procedure by adding to the Bi2WO6 previously obtained by hydrothermal method the corresponding amount of a prepared α-Fe2O3, the latter obtained by thermal decomposition of Fe(NO3)∙9H2O. The physicochemical surface, structural, morphological characteristics and optical...
Uploaded on: March 27, 2023 -
April 13, 2018 (v1)Publication
This study proposes a direct synthetic route to single titanate sheets through the mild and versatile conditions of the >chimie douce>. The stages of the production include the complexation of the titanium alkoxide precursor by benzoic acid, the formation of titanium oxo-clusters and their controlled transformation into single sheet titanates...
Uploaded on: March 27, 2023 -
April 17, 2019 (v1)Publication
In this study, commercial and lab-prepared TiO 2 were modified by fluorination and platinum photodeposition; and the effect of these modifications over the physicochemical and photocatalytic properties of TiO 2 was evaluated. It was found that F and Pt addition leads to the modification of the optical and textural properties of TiO2. The...
Uploaded on: December 4, 2022 -
October 28, 2021 (v1)Publication
UV/H2 O2 process and TiO2-based photocatalysis were studied in the present work. The effectiveness of these methods was tested in the treatment of effluents taken from handicraft factories. Microorganisms, dyes, and different organic pollutants were detected in the industrial effluents. The experimental procedure for the wastewater treatment...
Uploaded on: March 25, 2023