1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes

Chaudhary, Savita; Kaur, Yesbinder; Umar, Ahmad; Chaudhary, Ganga Ram

doi:10.1016/j.molliq.2016.05.011

Cited by 35 publications

(14 citation statements)

References 57 publications

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“…Zinc oxide is a known catalyst and can be used in environmental remediation processes due to its high chemical stability, low toxicity, biocompatibility, high catalytic activity in catalytic ozonation [17], very low solubility, and low price. ZnO powder, as a catalyst, has been used in different particle sizes and shapes for the removal of organic materials [18][19][20]. ZnO has been synthesized by different methods: using a precursor [21], hydrothermal [22], sonochemical [23], and modified sol-gel [24].…”

Section: Introductionmentioning

confidence: 99%

A new nano-ZnO/perlite as an efficient catalyst for catalytic ozonation of azo dye

Shokrollahzadeh

Abassi

Ranjbar

2018

Environmental Engineering Research

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In this investigation, nano ZnO was sonochemically synthesized by a novel method using a methionine precursor. A narrow size distribution (41-50 nm) of nano ZnO was achieved that was immobilized on perlite and applied as a catalyst in catalytic ozonation. The catalyst was characterized by fourier transform infrared spectroscopy, BET surface area, and field emission scanning electron microscope. The ozonation of recalcitrant Remazol black 5 (RB5) di-azo dye solution by means of the synthesized catalyst was investigated in a bubble column slurry reactor. The influence of pH values (7, 9, 11), catalyst dosage (8, 12, 15, 20 g L −1) and reaction time (10, 20, 30, 60 min) was investigated. Although the dye color was completely removed by single ozonation at a higher reaction time, the applied nanocatalyst improved the dye declorination kinetics. Also, the degradation of the hazardous aromatic fraction of the dye was enhanced five-times by catalytic ozonation at a low reaction time (10 min) and a neutral pH. The second-order kinetics was best fitted in terms of both RB5 color and its aromatic fraction removal. The total organic carbon analysis indicated a significant improvement in the mineralization of RB5 by catalytic ozonation using the nano-ZnO/perlite catalyst.

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Section: Introductionmentioning

confidence: 99%

A new nano-ZnO/perlite as an efficient catalyst for catalytic ozonation of azo dye

Shokrollahzadeh

Abassi

Ranjbar

2018

Environmental Engineering Research

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“…These data can be referred to the higher amine contents and porosity of both SiO 2 -5-5 and SiO 2 -10-10 more than SiO 2 -10 adsorbents to enhance the chemical bonding of CB-R250. Finally, it can be concluded that the prepared SiO 2 -5-5, SiO 2 -10-10, and SiO 2 -10 were adsorbed and reused as effective adsorbents for CB-R250 than the reported data in the literature [41][42][43][44][45][46].…”

Section: Adsorbents Langmuir Isotherm Parametersmentioning

confidence: 71%

“…These data confirm the excellent adsorption characteristics of the prepared SiO 2 NPs, which can be used as nano-adsorbent for organic dye water pollutants. In this respect, CB-R250 is one of the non-biodegradable anionic toxic reactive dyes that cannot be easily removed by several adsorbents having adsorption capacities more than 120 mg•g −1 [41][42][43][44][45][46]. The goal of the present work is using mesoporous SiO 2 -10, SiO 2 -5-5, and SiO 2 -10-10 NPs under optimization conditions for nano-adsorbents to remove CB-R250 dye from aqueous solution.…”

Section: Sequestration and Optimization Of Cb-r250 Dye Adsorptionmentioning

confidence: 99%

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Reactive Mesoporous pH-Sensitive Amino-Functionalized Silica Nanoparticles for Efficient Removal of Coomassie Blue Dye

et al. 2019

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In this work, new smart mesoporous amine-functionalized silica nanoparticles were prepared from hydrolyzing microgels based on N-isopropyl acrylamide-co-vinyltrimethoxysilane microgels with tetraethoxysilicate and 3-aminopropyltriethoxysilane by sol-gel method. The thermal stability and Fourier transform infrared were used to determine the amine contents of the silica nanoparticles. The pH sensitivity of the synthesized silica nanoparticles in their aqueous solutions was evaluated by using dynamic light scattering (DLS) and zeta potential measurements. The porosity of the amine-functionalized silica nanoparticles was evaluated from a transmittance electron microscope and Brunauer-Emmett-Teller (BET) plot. The results have positively recommended the pH-sensitive amine-functionalized silica nanoparticles as one of the effective nano-adsorbent to remove 313 mg·g−1 of CB-R250 water pollutant.

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“…Among the most common photocatalysts (e.g. ZnO, ZnS, CdS, Fe2O3, TiO2 and WO3), ZnO has been widely used for the removal of organic compounds [13]. The electrons of nano-ZnO are excited as a result of exposure to UV radiation, which generates electron (e -) hole (h + ) pair, because of the high energy level of the UV lamp.…”

Section: Introductionmentioning

confidence: 99%

An investigation on Removal Efficiency of Direct Blue 71 by ZnO Nano-Particles and Activated Carbon Produced from Agricultural Wastes

Larimi

Ayati

2017

IJEE

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Keywords:pH dye removal COD photocatalytic process adsorption A B S T R A C TThe present study used the adsorption process of activated carbon produced from agricultural wastes and the photocatalytic process of nano-ZnO to break down complex compounds available in removing Direct Blue 71 (henceforth, DB71). The two processes were done under three varied circumstancesadsorption/photocatalytic, photocatalytic/ adsorption, and simultaneous use of the processes. First, DB71 was exposed to activated carbon produced from walnut and almond shells and the efficiency achieved at equilibrium time (45 and 60 minutes) was 55 and 60 percent, respectively. Then, DB71 was exposed to different dosages of nano-ZnO to remove the dye completely. The result showed that amount of AC/ZnO in an optimum condition for two walnut and almond shell absorbents were 0.75/0.096 and1/0.096 g/L. Second, (photocatalytic/ adsorption) the complex compound of DB71 with a dosage of 0.024 g/L was broken down as a result of UV radiation. The experiment proceeded with different dosages of walnut and almond shells after achieving the efficiency of 50% in removing DB71 in the second process. The amounts of AC/ZnO were 0.75/0.024 and 1/0.024 for walnut and almond shells respectively under the optimum condition for the second process. In the third process advantages of the simultaneous use of photocatalytic and adsorption processes were taken in which different dosages of AC/ ZnO were used. Given the smaller dosages of nano-ZnO and less dye removal time, amounts of 0.75/ 0.288 g/L and 0.75/0.288 g/L were measured for walnut and almond shells. The findings show that photocatalytic/adsorption process was the more optimal process because of the less dosages of nano-ZnO, efficiency of removing DB71 and shorter dye removing time. Furthermore, the effect of the intensity of UV radiant on the efficiency and time of removing DB71 was also examined. The experiment revealed that removing COD in the optimum conditions were 47.22 and 49.6 and 62.23 and 63.15 percent using walnut and almond shell respectively both in the first experiment and the simulations use of adsorption and photocatalytic processes after 30 hours. While, in the second experiment (photocatalytic/ adsorption) 42.21 and 39.18 percent of COD were removed using walnut and almond shell respectively after 30 hours. The LC-mass test of photocatalytic/adsorption process also showed the degradation of DB 71 complex compounds.

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1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes

Cited by 35 publications

References 57 publications

A new nano-ZnO/perlite as an efficient catalyst for catalytic ozonation of azo dye

A new nano-ZnO/perlite as an efficient catalyst for catalytic ozonation of azo dye

Reactive Mesoporous pH-Sensitive Amino-Functionalized Silica Nanoparticles for Efficient Removal of Coomassie Blue Dye

An investigation on Removal Efficiency of Direct Blue 71 by ZnO Nano-Particles and Activated Carbon Produced from Agricultural Wastes

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