Preparation of Mg-doped TiO2 nanoparticles for photocatalytic degradation of some organic pollutants

Giahi, Masoud; Pathania, Deepak; Agarwal, Shilpi; Ali, Gomaa A. M.; Chong, Kwok Feng; Gupta, Vinod Kumar

doi:10.24193/subbchem.2019.1.01

Cited by 31 publications

(17 citation statements)

References 40 publications

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“…Upon applying optimal experimental conditions, an 80% degradation rate achieved within 60 min was observed in Figure 4 a,b. The following formula calculates the degradation efficiency [ 70 , 71 , 72 , 73 ]:

where

is the initial concentration of CR, and

is the immediate concentration.…”

Section: Resultsmentioning

confidence: 99%

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Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

et al. 2021

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In this study, silver/silver oxide nanoparticles (Ag/Ag2O NPs) were successfully biosynthesized using Phoenix dactylifera L. aqueous leaves extract. The effect of different plant extract/precursor contractions (volume ratio, v/v%) on Ag/Ag2O NP formation, their optical properties, and photocatalytic activity towards azo dye degradation, i.e., Congo red (CR) and methylene blue (MB), were investigated. X-ray diffraction confirmed the crystalline nature of Ag/Ag2O NPs with a crystallite size range from 28 to 39 nm. Scanning electron microscope images showed that the Ag/Ag2O NPs have an oval and spherical shape. UV–vis spectroscopy showed that Ag/Ag2O NPs have a direct bandgap of 2.07–2.86 eV and an indirect bandgap of 1.60–1.76 eV. Fourier transform infrared analysis suggests that the synthesized Ag/Ag2O NPs might be stabilized through the interactions of -OH and C=O groups in the carbohydrates, flavonoids, tannins, and phenolic acids present in Phoenix dactylifera L. Interestingly, the prepared Ag/Ag2O NPs showed high catalytic degradation activity for CR dye. The photocatalytic degradation of the azo dye was monitored spectrophotometrically in a wavelength range of 250–900 nm, and a high decolorization efficiency (84.50%) was obtained after 50 min of reaction. As a result, the use of Phoenix dactylifera L. aqueous leaves extract offers a cost-effective and eco-friendly method.

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where

is the initial concentration of CR, and

is the immediate concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Upon applying optimal experimental conditions, an 80% degradation rate achieved within 60 min was observed in Figure 4a,b. The following formula calculates the degradation efficiency [70][71][72][73]:…”

Section: Photocatalytic Activity Of Ag/ag 2 O Nps For Azo Dye Degradationmentioning

confidence: 99%

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

et al. 2021

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“…Among these semiconductor materials, titanium dioxide (TiO 2 ) was widely used in many photocatalytic applications because of its low toxicity, chemical stability, availability, convenient physical and optical properties, and low cost [8,9]. Numerous works recognized TiO 2 -based heterogeneous photocatalysis as an efficient technology for the elimination of different organic pollutants from water [10][11][12]. However, an important drawback in its use is related to the high recombination rate (within nanoseconds) of charge carries, which limits its photocatalytic efficiency [13].…”

Section: Introductionmentioning

confidence: 99%

TiO2 Doped with Noble Metals as an Efficient Solution for the Photodegradation of Hazardous Organic Water Pollutants at Ambient Conditions

Sescu

Favier

Lutic

et al. 2020

Water

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This work highlights new insights into the performance of TiO2 doped with noble metal catalysts for the photocatalytic degradation of organic water pollutants. Different samples of titanium dioxide doped with noble metals (Au and Pd) were successfully synthesized via incipient wet impregnation (IWI) and ultrasound-assisted impregnation (US) methods. X-ray diffraction, scanning electron microscopy and UV-Vis reflectance spectroscopy were used for the characterization of the obtained materials. Their photocatalytic efficiency was investigated in aqueous suspension thorough a series of laboratory tests performed under ultraviolet (UV-A) irradiation conditions using 2,4 dinitrophenol (2,4 DNP) as a target molecule. The results clearly show that the method used for the catalyst synthesis affects its photocatalytic activity. It was found that the samples prepared by the IWI method exhibited high photocatalytic activity, and the removal rate obtained with TiO2-Pd/IWI was higher than that found for TiO2-Au/IWI. Furthermore, for the best catalyst, some extra photocatalytic experiments were conducted with rhodamine 6G (R6G), a highly stable molecule with a very different chemical structure to 2,4 DNP, in order to check the reactivity of this material. Moreover, the recycling experiments carried out with TiO2-Pd/IWI clearly demonstrated the high photocatalytic stability of this material for the degradation of 2,4 DNP. All of the collected data confirmed the interesting photocatalytic potential of the selected catalyst in the elimination of organic pollutants with no obvious change in its reactivity after four reaction cycles, which is very promising for promoting future applications in water depollution.

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“…Graphene nanosheets which localized inside the chloroplast activated photosynthetic pigments, growth, primary metabolism, antioxidants as well as yield performance of peppers and eggplants (Younes et al, 2019). TiO 2 extensively used in photocatalytic reactions; upon exposure to ultraviolet light, it mineralizes the organic chemicals in rivers to water and CO 2 with the potency to devastate microorganisms (Lei et al, 2007;Giahi et al, 2019). Nowadays, TiO 2 NPs are used vastly in paints, plastics, cosmetics, and catalysts, thus its participation in agriculture fields will be prospected.…”

Section: Introductionmentioning

confidence: 99%

Impact of synthesized metal oxide nanomaterials on seedlings production of three Solanaceae crops

Younes

Shokry

Elkady

et al. 2020

Heliyon

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A B S T R A C TProspective involvement of metal oxide nanomaterials as a prominent agriculture practice for improving existing crop production directed the present investigation for synthesizing of ZnO and TiO 2 nanomaterials as an attempt to enhance the transplants production of some Solanaceae crops. The morphological characterizations of the prepared nanomaterials indicated that the hydrothermal synthesized ZnO was produced in nanorod structure with an average aspect ratio of 7. However, SEM and TEM micrographs of microwave prepared TiO 2 evident that it has a nanoparticle structure with an average diameter of 43 nm. The BET results confirmed the high specific areas of the two prepared metal oxide nanomaterials. The two synthesized metal oxide nanomaterials were coated in gel and mixed with the seeds of eggplant, pepper and tomato crops at four concentrations 0, 50, 100 and 150 mg/L, whilst the control seeds were germinated in distilled water without gel-coating. The results pointed to the outstanding effect of TiO 2 and ZnO nanoparticles on germination characters and seedlings growth. The maximum transplants lengths, fresh and dry weight were recorded at the level 100 mg/L whatever the crop plant used. Hastening germination operation of nanomaterials-gel coated seedlings compared to control plants may be ascribed to the reduction of mean germination time and coefficient variation of the germination process besides increasing the mean germination rate and the synchrony of germination traits. Overall, better performance of growing transplants has been accredited for nanoparticles-gel coated seedlings more than the control treatments which could be efficient for the safer production of transplants in an innovative way.

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Preparation of Mg-doped TiO2 nanoparticles for photocatalytic degradation of some organic pollutants

Cited by 31 publications

References 40 publications

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

TiO2 Doped with Noble Metals as an Efficient Solution for the Photodegradation of Hazardous Organic Water Pollutants at Ambient Conditions

Impact of synthesized metal oxide nanomaterials on seedlings production of three Solanaceae crops

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