A review on photodegradation of organic pollutants using spinel oxide

Kirankumar, V.S.; Sumathi, S.

doi:10.1016/j.mtchem.2020.100355

Cited by 70 publications

(33 citation statements)

References 165 publications

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“…Chemical precipitation methods contain homogeneous precipitation, direct precipitation and co-sedimentation. Preparation of photocatalyst with this method is often used for nanoscale synthesis [30]. The difference between these methods is in the number of cations.…”

Section: Precipitation Methodsmentioning

confidence: 99%

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Akhoondi

Feleni

Bethi³

et al. 2021

Synth. Sinter.

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Among the ongoing research on photocatalysis under visible-light, it has been shown that doped or hybrid catalysts are more active than a single catalyst alone. However, problems including visible light absorption, a low quantity of energetic sites on surfaces, and rapid recombination of the photo-electron hole pair produced by light have prohibited photocatalysts from being used in a practical and widespread manner. To overcome these problems, synthesis of nanostructure hybrid catalyst using several methods has attracted much attention. Several procedures have been suggested for the preparation of photocatalysts with the desired structure and morphology. Preparation methods similar to partial modification may lead to diverse structures and qualities. In this regard, the development of efficient, low-cost photocatalysts and rapid synthesis is the most important issues that should be considered. This review discusses various methods and mechanisms that work with the modification of vanadium compounds as photocatalysts to progress their photocatalytic efficiency. In addition, the effects of synthesis temperature, solution pH and concentration on the photocatalytic performance are also described in detail.

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Section: Precipitation Methodsmentioning

confidence: 99%

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Akhoondi

Feleni

Bethi³

et al. 2021

Synth. Sinter.

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“…A-and B-sites represent metallic cations located at two crystallographic sites, tetrahedral; and octahedral, respectively, with ferric ion (Fe +3 ) as a prime component in their structure. The metallic cations of the two mentioned sites are tetra-/octahedrally connected to the oxygen, respectively (Kefeni and Mamba, 2020;Kirankumar and Sumathi, 2020a). Also, the spinel ferrites with the general structure MFe 2 O 4 or MO.Fe 2 O 3 have a crystallographic building similar to the mineral spinel MgAl 2 O 4, which occurs naturally (Bragg, 1915).…”

Section: Structural Analysismentioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

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“…17 Fe, Co, and so forth; B = Al, Ga, In, Cr, Fe, Ni, Mn, Co, and so forth. 18 Their excellent characteristics such as the thermostabilized structure, low price, simple synthetic method, and environmental friendliness lead to many applications, especially in catalysis, because of the flexible adjustment of the atomic composition, structure, valence, and morphology. 19 MgAl 2 O 4 , a common spinel material, is widely used as a catalyst or catalyst support in the fields of petroleum processing and green chemical production because of its unique acid−base properties and excellent thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Spinels are materials with a particular crystalline structure, which widely exist in nature . Typically, spinels are concisely depicted as AB 2 O 4 , where A = Mg, Ca, Zn, Mn, Ni, Ba, Cu, Ge, Fe, Co, and so forth; B = Al, Ga, In, Cr, Fe, Ni, Mn, Co, and so forth . Their excellent characteristics such as the thermostabilized structure, low price, simple synthetic method, and environmental friendliness lead to many applications, especially in catalysis, because of the flexible adjustment of the atomic composition, structure, valence, and morphology .…”

Section: Introductionmentioning

confidence: 99%

Ga-Doped MgAl₂O₄ Spinel as an Efficient Catalyst for Ethane Dehydrogenation to Ethylene Assisted by CO₂

Xie

Miao

Hua

et al. 2021

Ind. Eng. Chem. Res.

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A series of Ga-doped MgAl2O4 spinels was prepared via a simple coprecipitation method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption, X-ray photoelectron spectroscopy (XPS), and thermogravimetry (TG) techniques. Their acidity and basicity were measured by NH3-temperature-programmed desorption (TPD) and CO2-TPD, respectively. These spinel catalysts exhibit good catalytic performance toward ethane dehydrogenation after Ga-doping either in the absence or in the presence of CO2. Their dehydrogenation activity is positively associated with the amount of surface acid sites of medium-strong strength, confirming that the coordinatively unsaturated Ga3+ cations are the active species in the reaction. The introduction of CO2 shows an obvious promoting effect on the dehydrogenation activity of the catalysts because of their high activity for the reverse water-gas shift reaction along with an improved catalyst stability, as a result of the coexisting Boudouard reaction. An ethane conversion of 43% and ethylene selectivity of 92% can be achieved, and the activity and selectivity of this type of catalysts can be fully recovered by regeneration through calcination in flowing air.

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A review on photodegradation of organic pollutants using spinel oxide

Cited by 70 publications

References 165 publications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Ga-Doped MgAl₂O₄ Spinel as an Efficient Catalyst for Ethane Dehydrogenation to Ethylene Assisted by CO₂

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A review on photodegradation of organic pollutants using spinel oxide

Cited by 70 publications

References 165 publications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Ga-Doped MgAl2O4 Spinel as an Efficient Catalyst for Ethane Dehydrogenation to Ethylene Assisted by CO2

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Ga-Doped MgAl₂O₄ Spinel as an Efficient Catalyst for Ethane Dehydrogenation to Ethylene Assisted by CO₂