Melissa Officinalis L. leaf extract assisted green synthesis of CuO/ZnO nanocomposite for the reduction of 4-nitrophenol and Rhodamine B

Bordbar, Maryam; Negahdar, Neda; Nasrollahzadeh, Mahmoud

doi:10.1016/j.seppur.2017.09.044

Cited by 156 publications

(49 citation statements)

References 25 publications

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“…Afterward, the synthesized Ag-TiO 2 was filtered, washed and dried at 80°C for 12 h. Ag-TiO 2 catalysts with 2, 4, 6 and 8% Ag loading were prepared. The leaves of referred plant contain a variety of phytochemicals including flavonoids and phenolic components which are considered as reducing agent for reduction of Ag 1+ to Ag [28][29][30][31][32].…”

Section: Synthesis Of Ag-tiomentioning

confidence: 99%

Azadirachta indica leaves extract assisted green synthesis of Ag-TiO2 for degradation of Methylene blue and Rhodamine B dyes in aqueous medium

Saeed

Muneer

Khosa

et al. 2019

Green Processing and Synthesis

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Aqueous pollution due to textile industry is an important issue. Photocatalysis is one of the methods used for eradication of dyes from textile industrial effluents. In this study, the synthesis, characterization and evaluation of photo catalytic activity of Ag-TiO2 is reported. TiO2 catalysts with 2, 4, 6 and 8% loading of Ag were prepared by green methods using Azadirachta indica leaves extract as reducing agent with titanium dioxide and silver nitrate as precursor materials. Prepared catalyst was characterized by advanced techniques and was used as catalyst for degradation of Methylene blue and Rhodamine B dyes. Deposition of Ag greatly enhanced the catalytic efficiency of TiO2 towards degradation of dyes. Irradiation of catalyst excites electrons from conduction band of catalyst to valence band yielding an electron-hole pair. This electron-hole pair undergoes secondary reactions and produce OH∙ radicals. These active radicals take part in degradation of dyes. More than 90% dyes were degraded in 120 min. Photo catalytic degradation of Methylene blue and Rhodamine B followed Eley-Rideal mechanism which states that dye react in fluid phase with adsorbed oxygen.

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Section: Synthesis Of Ag-tiomentioning

confidence: 99%

Azadirachta indica leaves extract assisted green synthesis of Ag-TiO2 for degradation of Methylene blue and Rhodamine B dyes in aqueous medium

Saeed

Muneer

Khosa

et al. 2019

Green Processing and Synthesis

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“…Nanoscience and nanotechnology are an interdisciplinary field of study that has been found to embed the desirable impact on economy and society in the 21 st century and it has the potential for generating next industrial revolution. The nanomaterials such as nanocomposites (Bordbar et al, 2018[ 9 ]; Pandey et al, 2017[ 40 ]; Das and Srivasatava, 2016[ 11 ]), nanotubes (Eatemadi et al, 2014[ 15 ]; Rao et al, 2007[ 49 ]), nanoelectronics (Pês et al, 2014[ 42 ]; Park et al, 2016[ 41 ]), and NPs are widely used these days. NPs have drawn more attention of scientist community because of their unique physico-chemical properties.…”

Section: Introductionmentioning

confidence: 99%

A review on biogenic synthesis, applications and toxicity aspects of zinc oxide nanoparticles

Sharma

Garg

Kumari

2020

EXCLI Journal; 19:Doc1325; ISSN 1611-2156

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“…Nowadays, numerous nitroaromatic compounds have been discharged into rivers with the overuse of dyes, explosives and pesticides in industry, causing serious water pollution [ 1 ]. Regrettably, 4-nitrophenol (4-NP) is the most typical toxic and refractory organic pollutant, attacking the eco-systems of both humans, as well as animals and consequently promoting various diseases [ 2 ]. Therefore, the degradation of 4-NP into non-toxic small molecules and in turn preventing harm has become a research hotspot in recent years [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

et al. 2018

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In this work, we report the enhanced catalytic reduction of 4-nitrophenol driven by Fe3O4-Au magnetic nanocomposite interface engineering. A facile solvothermal method is employed for Fe3O4 hollow microspheres and Fe3O4-Au magnetic nanocomposite synthesis via a seed deposition process. Complementary structural, chemical composition and valence state studies validate that the as-obtained samples are formed in a pure magnetite phase. A series of characterizations including conventional scanning/transmission electron microscopy (SEM/TEM), Mössbauer spectroscopy, magnetic testing and elemental mapping is conducted to unveil the structural and physical characteristics of the developed Fe3O4-Au magnetic nanocomposites. By adjusting the quantity of Au seeds coating on the polyethyleneimine-dithiocarbamates (PEI-DTC)-modified surfaces of Fe3O4 hollow microspheres, the correlation between the amount of Au seeds and the catalytic ability of Fe3O4-Au magnetic nanocomposites for 4-nitrophenol (4-NP) is investigated systematically. Importantly, bearing remarkable recyclable features, our developed Fe3O4-Au magnetic nanocomposites can be readily separated with a magnet. Such Fe3O4-Au magnetic nanocomposites shine the light on highly efficient catalysts for 4-NP reduction at the mass production level.

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Melissa Officinalis L. leaf extract assisted green synthesis of CuO/ZnO nanocomposite for the reduction of 4-nitrophenol and Rhodamine B

Cited by 156 publications

References 25 publications

Azadirachta indica leaves extract assisted green synthesis of Ag-TiO2 for degradation of Methylene blue and Rhodamine B dyes in aqueous medium

Azadirachta indica leaves extract assisted green synthesis of Ag-TiO2 for degradation of Methylene blue and Rhodamine B dyes in aqueous medium

A review on biogenic synthesis, applications and toxicity aspects of zinc oxide nanoparticles

Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe3O4-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application

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