Ultrasound assisted sol-gel TiO 2 powders and thin films for photocatalytic removal of toxic pollutants

Bogatu, Cristina; Perniu, Dana; Său, Ciprian; Iorga, Ovidiu; Cosnita, Mihaela; Duţă, Anca

doi:10.1016/j.ceramint.2017.03.054

Cited by 23 publications

(5 citation statements)

References 19 publications

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“…The particle size can also be controlled by sonication time and power. Ultrasound also prevents particle agglomeration and breaks down the agglomerates (Bogatu et al., 2017). Ultrasound affects synthesis of nanoparticles in various ways, nucleation, particle growth, and as well as dissolution and reprecipitation process.…”

Section: Ultrasound Assisted Sol‐gel Synthesis Of Nanocatalystsmentioning

confidence: 99%

A review on ultrasound assisted synthesis of metal oxide and doped metal oxide nanocatalysts and subsequent application as photocatalyst for dye degradation

Dey

Gogate

Gote

2023

Environmental Quality Mgmt

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In recent years, research on improving the synthesis of catalysts has been at the forefront because of advancements in nanotechnology and greener conventions. Using ultrasound (US) during nanocatalysts synthesis is one of the green approaches that can yield improved catalyst characteristics under conditions of shorter reaction time and requirement of low temperature and pressure. The current paper aims at giving an insight into US‐assisted synthesis (emphasized on sol‐gel and hydrothermal) of different metal oxide nanocatalysts. It has been elucidated that US‐assisted synthesis gives nanocatalyst with narrower particle size distribution with lower mean size, higher surface area, better morphology with less agglomeration, and higher catalytic activity. Ultrasound has thus been demonstrated to yield improvements in morphological, optical, and electronic properties of the nanocatalysts, however, scalability and industrial application of sonochemical synthesis have not been seen very popular. Some guidelines for future research into the development of novel nanocatalysts and industrial scale‐up studies are also provided. The review also summarizes the application of these metal oxides as photocatalysts for dye degradation or effluent treatment containing dyes, highlighting the fundamentals of photocatalysis as well. A comparative study has been reported for catalysts obtained using the US‐assisted synthesis and conventional synthesis of the photocatalysts in terms of catalytic activity. The benefits of using ultrasound‐assisted synthesis in terms of higher photocatalytic degradation have been clearly demonstrated.

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Section: Ultrasound Assisted Sol‐gel Synthesis Of Nanocatalystsmentioning

confidence: 99%

A review on ultrasound assisted synthesis of metal oxide and doped metal oxide nanocatalysts and subsequent application as photocatalyst for dye degradation

Dey

Gogate

Gote

2023

Environmental Quality Mgmt

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“… − Titanium dioxide (TiO 2 ) is one of the most favorable catalysts that has been examined in various experimental studies for its resistivity to corrosion hasty. , It is considered a promising catalyst that could be used in visible light. , Immobilizing TiO 2 on supportive catalysts has been conducted in many studies and has shown promising findings . Different coating methods can be used for coating the photoelectrodes by TiO 2 catalysts, including electrodeposition, sol–gel, − sol–spray, chemical vapor deposition, thermal treatment, and hydrothermal treatment . The fabrication and morphologies of TiO 2 have been investigated in various studies through zero-dimensional (0D), one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) nanostructures .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Novel Photoelectrochemical Hydrogen Cell Design for Clean Hydrogen Generation

Qureshy

Dinçer

2021

Ind. Eng. Chem. Res.

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A unique meshy dome-type photoanode design is investigated to utilize the available light at any angle of the sunbeams during daytime due to its specific configuration. The configuration of the working photoanode aims to harvest the maximum available sunlight by increasing the illuminated area. The mesh content allows the light beams to spread inside the dome electrode to increase the absorbed light at the different angles of the sunbeams during the daytime. The present dome mesh cathode and photoanode are manufactured from cheap materials such as titanium and stainless steel. The stainless-steel photoanode is deposited by titanium dioxide using the sol–gel dip-coating method. The current electrodes are placed in a potassium dioxide solution of 0.25 M and tested under artificial light at two conditions, including 45° tilted and vertical light. The current experimental results show that the greatest photocurrent density obtained is 5.05 mA/cm2. The maximum hydrogen production rates obtained under the tilted and vertical-light conditions are 14.01 and 14.36 μg/s, respectively. The highest overall energy efficiency obtained at the vertical-light condition is 2.92%. The enhancement of the hydrogen production rate fluctuates in the range of 75–80% that occurs with tilted light, compared with the enhancement under vertical-light conditions.

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“…In order to solve various problems encountered by conventional methods for the degradation of organic species resistant to them, many researchers have turned their attention to a particular group of oxidation techniques called Advanced Oxidation Processes (AOPs). Among AOPs, heterogeneous and homogeneous photocatalytic oxidation has been studied extensively and it has been demonstrated to be an alternative to conventional methods for the removal of organic pollutants from water and air [22,23] . Meanwhile, photocatalytic oxidation has the potential to use solar energy, integrating, in this way, mild energy into environment protection.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic oxidation of psychoactive drug Duloxetine: Degradation kinetics, inorganic ions and phytotoxicity evaluation

Tsoumachidou

Valari

Poulios

2020

ACE

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Pharmaceutically active compounds, emerging extensively in ecosystems as pollutants, have become an important environmental and public health issue, since they can contaminate drinking water and pose threat to wildlife and human health. Therefore, efforts should be made in order to establish proper methods for their inactivation or elimination in the environment. The photocatalytic oxidation of psychoactive drug Duloxetine (DLX) has been investigated. In the case of heterogeneous photocatalytic oxidation, the effect of TiO2 P25 concentration (0.1–1 g L-1), initial concentration of H2O2 (0.25–0.2 g L-1) and Fe3+ (0.00175–0.014 g L-1) and pH of the solution (3–10) on initial reaction rates were evaluated, while for homogeneous photocatalytic oxidation the effect of the amount of H2O2 (0.25–0.2 g L-1) and Fe3+ (0.00175–0.014 g L-1) were investigated. Additionally, the conversion of the heteroatoms in the molecule of DLX to inorganic ions (NO3-, NH4+, SO42-) during photocatalytic process has been observed, and phytotoxicity testing, using three plant species, was carried out in order to examine the effect of photocatalytic oxidation on the toxicity of DLX. According to the results presented in this study, both heterogeneous and homogeneous photocatalytic oxidation is an efficient methodology for DLX degradation.

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Ultrasound assisted sol-gel TiO 2 powders and thin films for photocatalytic removal of toxic pollutants

Cited by 23 publications

References 19 publications

A review on ultrasound assisted synthesis of metal oxide and doped metal oxide nanocatalysts and subsequent application as photocatalyst for dye degradation

A review on ultrasound assisted synthesis of metal oxide and doped metal oxide nanocatalysts and subsequent application as photocatalyst for dye degradation

Experimental Study of a Novel Photoelectrochemical Hydrogen Cell Design for Clean Hydrogen Generation

Photocatalytic oxidation of psychoactive drug Duloxetine: Degradation kinetics, inorganic ions and phytotoxicity evaluation

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