Heterogeneous catalytic reduction of 4-nitroaniline by RGO-Ni nanocomposite for water resource management

Das, Piu; Ghosh, Sanjukta; Baskey, Moni

doi:10.1007/s10854-019-02323-8

Cited by 29 publications

(18 citation statements)

References 51 publications

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“…However, it is important to know that the elimination of nanoparticles after water purification needs to be addressed [81]. Multiple scientific works covered dye degradation using nanocomposites including graphene oxide/zinc oxide (GO/ZnO) [111], polyaniline/SiO 2 [121] and RGO-Ni [130]. Umar et al [150] used Pd-Ni bimetallic nanoparticles to treat Acid orange 8 (Table 1).…”

Section: Nanoparticle Utilizationmentioning

confidence: 99%

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Slama¹,

et al. 2021

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Natural dyes have been used from ancient times for multiple purposes, most importantly in the field of textile dying. The increasing demand and excessive costs of natural dye extraction engendered the discovery of synthetic dyes from petrochemical compounds. Nowadays, they are dominating the textile market, with nearly 8 × 105 tons produced per year due to their wide range of color pigments and consistent coloration. Textile industries consume huge amounts of water in the dyeing processes, making it hard to treat the enormous quantities of this hazardous wastewater. Thus, they have harmful impacts when discharged in non-treated or partially treated forms in the environment (air, soil, plants and water), causing several human diseases. In the present work we focused on synthetic dyes. We started by studying their classification which depended on the nature of the manufactured fiber (cellulose, protein and synthetic fiber dyes). Then, we mentioned the characteristics of synthetic dyes, however, we focused more on their negative impacts on the ecosystem (soil, plants, water and air) and on humans. Lastly, we discussed the applied physical, chemical and biological strategies solely or in combination for textile dye wastewater treatments. Additionally, we described the newly established nanotechnology which achieves complete discharge decontamination.

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Section: Nanoparticle Utilizationmentioning

confidence: 99%

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Slama¹,

et al. 2021

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“…It is well known that graphene [29,30] is a rising star in nanoscientific world since in presence of it the superiority of the nanocomposites becomes elevated. Recently, graphene-based nanomaterials have been chosen to improve the photoactivity of the nanocatalysts due to the excellent surface area of graphene [31,32]. It is substantiated that among the graphene-based nanostructures, graphene-cadmium sulfide nanocomposites have been explored much attraction for the removal of toxic materials from the aqueous environment [33,34].…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

et al. 2021

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Fabrication of effective photocatalyst using semiconductors and graphene or reduced graphene oxide has been regarded as one of the most promising task to attenuate the environmental pollution. This paper reports the synthesis of different nanocomposites of reduced graphene oxide-cadmium sulfide (RGO-CdS) with varying weight ratio of RGO by simple reflux condensation reaction, during which the reduction of graphene oxide (GO) and formation of CdS nanoparticles occur simultaneously. The combination of CdS nanoparticles (NPs) with the optimum amount of RGO gives a noticeable effect on the properties of the synthesized hybrid nanocomposites, such as enhanced optical, photocatalytic properties. The microscopic studies proved that with the increasing RGO content in the nanocomposites, the particle size decreases and got different shapes. These nanocomposites have been investigated separately as nanocatalyst for the reduction of Cr(VI) to Cr(III) in the presence of visible light irradiation and the catalytic activity depends on the pH of the medium and also the particle size of the CdS NPs which are supported by the band gap energy derived from Tauc's equation. The significant increase in photocatalytic performance of the RGO-CdS nanocomposite was attributed to high electron conductivity of the CdS NPs and RGO surface which facilitates charge separation and prolongs the lifetime of photogenerated electron-hole pairs by decreasing the recombination rate. Antibacterial and antiprotozoal activities have been investigated to determine the efficiency of these RGO-CdS nanocomposites on different bacterial and protozoan strains.

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“…Das et al. [27] analyzed the impact of nanocomposites on reducing nitro compounds resulting from dyes in wastewater. The results exhibited that the synthesized Ni−RGO nanocomposites via the hydrothermal method could remove the dye concentration by about 93 % at 190 min.…”

Section: Introductionmentioning

confidence: 99%

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium

2022

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The primary objective of this research is to investigate the reduction of 4‐nitroaniline (4‐NA) and 2‐nitroaniline (2‐NA) using synthesized copper ferrite nanoparticles (NPs) via facile one‐step hydrothermal method as a heterogeneous nano‐catalyst. Nitroanilines were reduced in the presence and without the catalyst with a constant amount (100 mg) of reducing agent of sodium borohydride (NaBH 4 ) at room temperature in water to amino compounds. To characterize the functional groups, size, structure, and morphology of as‐prepared magnetic NPs, FTIR, XRD, SEM, and TEM were employed. The UV‐Vis spectrum was utilized to explore the catalytic effect of CuFe 2 O 4 . The outcomes revealed that the synthesized CuFe 2 O 4 as a heterogeneous magnetic nano‐catalyst catalyzed the reduction of 4‐NA and 2‐NA significantly faster than other candidate catalysts. The outcomes demonstrated that the catalyst catalyzed 4‐nitroaniline to para ‐phenylenediamine ( p ‐PDA) and 2‐nitroaniline to ortho ‐phenylenediamine (o‐PDA) with a constant rate of 7.49×10 −2 s −1 and 3.19×10 −2 s −1 , and conversion percentage of 96.5 and 95.6, in 40 s and 90 s, sequentially. Furthermore, the nanoparticles could be recovered by a magnetic separation method and reused for six consecutive cycles without remarkable loss of catalytic ability.

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Heterogeneous catalytic reduction of 4-nitroaniline by RGO-Ni nanocomposite for water resource management

Cited by 29 publications

References 51 publications

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium

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Heterogeneous catalytic reduction of 4-nitroaniline by RGO-Ni nanocomposite for water resource management

Cited by 29 publications

References 51 publications

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe2O4 Nanoparticles in an Aqueous Medium

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The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium