2020


Graphical abstract

CuO thin films deposited by DC sputtering and their photocatalytic performance under simulated sunlight

2020

CuO thin films were obtained by DC Sputtering varying the deposit time: 10, 20 and 30 min with the thickness of 60, 120 and 180 nm, respectively. These films were used photocatalysts in two different photocatalytic processes: hydrogen production and CO2 photoreduction under simulated sunlight. The film with 120 nm of thickness generated the highest amount of hydrogen (24 μmol) of the films tested. Furthermore, the ellipsometry results showed that this film absorbs the simulated light in the UV-to-IR region...

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2019


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Facile preparation of KBiO3/g-C3N4 composites with microwave irradiation for photocatalytic hydrogen production

2019

KBiO3/g-C3N4 composites were prepared under microwave irradiation to different weight ratio of KBiO3 (5, 10, 20, 30, 40, 50, 60, 70 80, 90 %wt) using a Mars-6 for 30 min at 100 W...

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Graphical abstract

Optical properties of TiO2 Nanorods and their effect in photocatalytic hydrogen production

2019

TiO2 nanorods were prepare by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods are presented the rutile phase...

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Graphical abstract

Facile preparation of BiVO4 thin film by screen-printing technique for its photocatalytic performance in the degradation of ciprofloxacin under simulated sunlight irradiation

2019

BiVO4 film has been fabricated using a screen printing process on common glass. XRD analysis indicated that the film after calcination at 400 °C for 2 h appear to be the optimal conditions...

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Graphical abstract

The role of the oxidizing species and the influence of KBiO3 synthesis method in the photodegradation of Methylene Blue and Ciprofloxacin

2019

KBiO3 was synthesized by three methods: chemical substitution, hydrothermal and sonochemical. All reaction products were analyzed by means of X-ray powder diffraction and reveals that KBiO3 presents a cubic structure...

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An efficient and stable WO3/g-C3N4 photocatalyst for ciprofloxacin and orange G degradation

2019

In this work, the WO3/g-C3N4 heterojunction system has been prepared through a sonochemical process at 37 kHz. The composites were characterized by powder X-ray diffraction, diffuse reflectance and Fourier transform infrared spectroscopies, scanning electron microscopy and nitrogen adsorption-desorption measurements. The photocatalytic activity of the coupled system was evaluated by the photodegradation of the Orange G dye and the ciprofloxacin antibiotic under solar-like irradiation conditions....

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Schematic diagram of the proposed photocatalytic mechanism for the CIP degradation

Novel and stable Fe-BiVO4 nanocatalyst by efficient dual process in the ciprofloxacin degradation

2019

Novel Fe-impregnated BiVO4 was synthetized by a sonochemistry method, then the Fe-impregnation was prepared through an easy and low-cost method by the directly hydrolyzes iron salt onto BiVO4 nanoparticles. Scanning electron microscope equipped with an energy dispersive spectrometer analysis indicated the presence of Fe on the impregnated BiVO4. Half-time of Fe-BiVO4 (1%) sample was 10 times greater than BiVO4 pure in the ciprofloxacin degradation by a dual effect process under UV-Vis light irradiation...

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Graphical abstract

TiO2 nanorods grown by hydrothermal method and their photocatalytic activity for hydrogen production

2019

TiO2 nanorods were prepared by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods, the rutile phase is present. The thin film thickness were measured using a profilometer, resulting in a thickness of 310 nm for the seed layer and ∼400 nm for TiO2 nanorods. ...

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Graphical abstract.

Visible-light-driven BaBiO3 perovskite photocatalysts: effect of physicochemical properties on the photoactivity towards water splitting and the removal of rhodamine B from aqueous systems

2019

In this work, visible-active BaBiO3 perovskite photocatalysts were prepared by solid state and hydrothermal methods. The physicochemical characterization of the materials was carried out by XRD, SEM, UV–vis, PL and EIS analysis. It was found that the materials exhibit a base centered monoclinic structure with morphology of dense irregular particles and an absorption edge near to 620nm (∼2eV) in the visible region...

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2018


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Extended visible light harvesting and boosted charge carrier dynamics in heterostructured zirconate-FeS2 photocatalysts for efficient solar water splitting

2018

Limited visible light absorption, slow charge transference, and high recombination are some of the main problems associated with low efficiency in photocatalytic processes. For these reasons, in the present work, we develope novel zirconate–FeS2 heterostructured photocatalysts with improved visible light harvesting, effective charge separation and high photocatalytic water splitting performance.

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Graphical abstract.

Electrophoretic deposition of PbMoO4 nanoparticles for photocatalytic degradation of tetracycline

2018

In the present work, we report the electrophoretic deposition of lead molybdate nanoparticles which were synthesized by an ultrasonic-assisted method using Pb(NO3)2 and H2MoO4 as precursors...

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2017


Photocatalytic degradation of an aqueous solution of Tetracycline with the phases synthesized by solvo-combustion method.

Photocatalytic performance of titanates with formula MTiO3 (M= Fe, Ni and Co) synthesized by solvo-combustion method.

2017

This work reports the synthesis of a variety of materials with an ilmenite-type structure MTiO3 formula, where M= Fe, Co, and Ni, these materials were synthesized by the method of solvo-combustion, a simple and rapid method...

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Graphical abstract.

Novel visible light-driven PbMoO4/g-C3N4 hybrid composite with enhanced photocatalytic performance

August 1, 2017

Novel visible light-driven PbMoO4/g-C3N4 hybrid composites were synthesized with loadings 0, 20, 50, 80 and 100 wt.% of PbMoO4 by sonochemical method. The PbMoO4/g-C3N4 hybrid composites were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS)...

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Reaction mechanism for photocatalytic H2 generation.

Cu2O precipitation-assisted with ultrasound and microwave radiation for photocatalytic hydrogen production

May 4, 2017

Copper oxides are considered efficient photocatalysts for H2 generation. In addition, due to their interesting properties such as surface plasmon resonance, they are applied in photo-induced reactions. In heterogeneous photocatalysis, CuO and Cu2O are the main oxides...

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Variation of the UV–vis absorption spectra during the photocatalytic degradation of CPFX (10 mg L−1) during 4 h of reaction.

Sonochemical synthesis of CaBi6O10 nanoplates: Photocatalytic degradation of organic pollutants (ciprofloxacin and methylene blue) and oxidizing species study (h+, OH·, H2O2 and O2·-)

March 30, 2017

CaBi6O10 nanoplates were synthesized by a sonochemical method using a high-power ultrasonic processor. Also, the CaBi6O10 was synthesized by an impregnation-calcination method in order to compare the effect of the synthesis method on the photocatalytic activity of the photocatalyst...

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2016


Graphical abstract.

Performance of the polymeric g-C3N4 photocatalyst through the degradation of pharmaceutical pollutants under UV–vis irradiation

June 30, 2016

The graphite-like C3N4 was prepared by means the polycondensation of melamine at 500 C for 4 h. The polymeric photocatalyst was characterized by several techniques such as X-ray powder diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS) and scanning electron microscopy (SEM)...

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Schematic representation of the formation of Bi2O3 particles exposed for 1, 2 or 3 h to ultrasound radiation.

Photocatalytic properties of Bi2O3 powders obtained by an ultrasound-assisted precipitation method

January, 2016

Bi2O3 nanoplates were synthesized by an ultrasound-assisted precipitation method in aqueous solution with different times of exposure to ultrasound radiation. The formation of Bi2O3 oxide with a monoclinic structure was confirmed by X-ray powder diffraction (XRD)...

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2015


Photocatalytic degradaton of rhB (5mg.L-1) by WO3 synthesized via microwave assisted by hydrothermal under different experimental conditions.

Influence of the synthesis method on the morphology and photocatalytic properties of WO3 (Only available in spanish)

November, 2015

In the present work WO3 nanoparticles by two synthesis methods were prepared: microwave assisted hydrothermal and ultrasound synthesis method assisted with CTAB. The nanoparticles were characterized by XRD, SEM, UV-vis and surface area by BET method...

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Variation of the UV–Vis absorption spectra of rhodamine B (c) solution at 5, 30, and 20 mg l−1.

Photocatalytic properties of BiVO4 synthesized by microwave-assisted hydrothermal method under simulated sunlight irradiation

November, 2015

BiVO4 with monoclinic-type structure were successfully synthesized by microwave-assisted hydrothermal method (BiMH) and hydrothermal reaction (BiH500) in aqueous medium. The materials were characterized by X-ray diffraction, scanning electron microscopy, Barrett–Emmett–Teller technique...

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Basic mechanism of water splitting over the SrZrO3 semiconductor..

SrZrO3 powders: Alternative synthesis, characterization and application as photocatalysts for hydrogen evolution from water splitting

October, 2015

In this study, it was synthesized strontium zirconate (SrZrO3) powders using three methods: a traditional solid-state reaction, molten salts and ultrasound-assisted synthesis. The structural, morphological, optical and textural properties of the prepared powders were investigated using...

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Graphical abstract.

CTAB-assisted ultrasonic synthesis, characterization and photocatalytic properties of WO3

January, 2015

WO3 2D nanostructures have been prepared by ultrasound synthesis method assisted with CTAB using different molar ratios. The formation of monoclinic crystal structure of WO3 was confirmed by X-ray powder diffraction (XRD)....

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2014


Graphical abstract.

Facile solvo-combustion synthesis of crystalline NaTaO3 and its photocatalytic performance for hydrogen production

August 15, 2014

Significant attention has been paid on the photocatalytic production of hydrogen from water splitting by using semiconductor materials. The NaTaO3 phase has been studied for this purpose due to its high potential to generate charge carriers by absorbing the photons energy...

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Photocatalytic degradation of rhB (5 mg L−1) under UV–vis irradiation; the photocatalyst was WO3 synthesized under different experimental conditions.

Characterization and photocatalytic properties of hexagonal and monoclinic WO3 prepared via microwave-assisted hydrothermal synthesis

April, 2014

WO3 nanoparticles with hexagonal and monoclinic structures were synthesized via a microwave-assisted hydrothermal process without the use of any additives in which the microwave hydrothermal reaction time was 30 or 60 min and was followed by different thermal treatments...

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Schematic illustration of the process of formation of MoO3 and Sm2O3 structures.

Innovative solvo-combustion route for the rapid synthesis of MoO3 and Sm2O3 materials

January, 2014

This paper reports the development of a solvo-combustion synthesis route using acetylacetone as the novel fuel and ethanol as the solvent, with water excluded from the system. MoO3 and Sm2O3 materials synthesized by this route were characterized by various physicochemical techniques...

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2013


Graphical abstract.

Facile synthesis of m-WO3 powders via precipitation in ethanol solution and evaluation of their photocatalytic activities

June 15, 2013

Tungsten(VI) oxide (WO3) powders have been synthesized from a precursor material prepared via a simple precipitation method in ethanol medium followed by thermal treatments at 500 and 700 °C. Structural characterization by X-ray Rietveld refinement...

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Graphical abstract.

Synthesis of WO3 nanoparticles by citric acid-assisted precipitation and evaluation of their photocatalytic properties

February, 2013

WO3 nanoparticles were synthesized by citric acid-assisted precipitation method using a 1:1.5 molar ratio of ammonium paratungstate hydrate (H42N10O42W12·xH2O):citric acid (C6H8O7). The formation of monoclinic crystal structure of WO3 at different temperatures was confirmed by...

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2011


Graphical abstract.

Photocatalytic properties of WO3 nanoparticles obtained by precipitation in presence of urea as complexing agent

May 15, 2011

WO3 nanoparticles were synthesized by a precipitation method in presence of urea at different calcination temperatures. The characterization of the WO3 samples was carried out by X-ray powder diffraction (XRD)...

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2010


Graphical abstract.

Synthesis and characterization of WO3 nanoparticles prepared by the precipitation method: Evaluation of photocatalytic activity under vis-irradiation

January, 2010

WO3 nanoparticles were synthesized by the precipitation method varying the time employed in the formation of their precursor in aqueous media and the calcination temperature. The WO3 crystallization process and morphology of the synthesized samples were ...

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2008


Photocatalytic tests at different concentrations.

Photocatalytic activity of L-Bi2MoO6 and H-Bi2MoO6 in rhodamine B degradation by action of visible light (Only available in spanish)

April, 2008

The photocatalytic activity of the semiconductor oxide Bi2MoO6 by visible light in the degradation of Rhodamine B in aqueous solution was evaluated in this research. The Bi2MoO6 was synthesized by solid state in the two crystaline forms...

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