A facile hydrothermal synthesis, adsorption kinetics and isotherms to Congo Red azo-dye from aqueous solution of NiO/graphene nanosheets adsorbent

Rong, Xinshan; Qiu, Fengxian; Qin, Jiao; Zhao, Hao; Yan, Jie; Yang, Dongya

doi:10.1016/j.jiec.2014.12.009

Cited by 107 publications

(37 citation statements)

References 55 publications

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“…Moreover, the peak at 531.4 was attributed to the C=O group or shoulder peak of NiO. Furthermore, the peaks of 532.6 and 535.0 eV represent Ni-O-H bonds and H 2 O adsorbed on the surface of the NiO nanoparticles [35]. The broad-spectrum Ni (Figure 6d) represents the characteristic peaks of Ni 2+ 2p 3/2 , and its satellite peaks were found at 853.4, 855.6, and 861.0 eV, respectively, while the Ni 2+2p1/2 peak was observed at 872.9 and its satellite peak was located at the position of 879.2 eV, which strongly confirmed the formation of NiO structures.…”

Section: Xps Studiesmentioning

confidence: 96%

Phytogenic Generation of NiO Nanoparticles Using Stevia Leaf Extract and Evaluation of Their In-Vitro Antioxidant and Antimicrobial Properties

Thyagarajan²,

et al. 2020

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In the present study, economically viable NiO nanoparticles were produced by biogenic preparation using stevia leaf broth and their in-vitro antioxidant and antimicrobial activities were evaluated. The properties of the prepared NiO nanoparticles were confirmed by analytical techniques such as Ultraviolet-Visible (UV-Vis), X-ray diffraction (XRD), FE-SEM, and Fourier transform infrared spectroscopy (FTIR) analyses. Morphological studies using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the size of synthesized nanoparticles ranged from 20 to 50 nm, most of which were spherical and few of which were agglomerated. The role of the biological moieties, which reduce and cap the nanoparticles, was studied using FTIR analysis. The prepared nanoparticles strongly inhibited gram-negative bacteria, which is a camper with gram-positive bacteria and fungi. Furthermore, it performs an effective in-vitro activity through α,α-diphenyl-β-picrylhydrazyl (DPPH) reduction. Thus, it can be concluded that the effective and easy green synthesis process used for NiO nanoparticles provides potential antimicrobial agents against multidrug-resistant microbes.

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Section: Xps Studiesmentioning

confidence: 96%

Phytogenic Generation of NiO Nanoparticles Using Stevia Leaf Extract and Evaluation of Their In-Vitro Antioxidant and Antimicrobial Properties

Thyagarajan²,

et al. 2020

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“…Azo dyes account for 60-70% of total dye consumption in many industries [7]. Congo red (CR) is the synthetic anionic azo dye [9] and the effluent had to be adequately treated and discharged into the environment, otherwise it can metabolize into benzidine, which is a human carcinogen [10]. CR dye contains complex aromatic structure which complicates the treatment process.…”

Section: Introductionmentioning

confidence: 99%

Chrysanthemum indicum microparticles on removal of hazardous Congo red dye using response surface methodology

Chukki

Abinandan²,

Shanthakumar

2018

Int J Ind Chem

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Biomass-derived adsorbents have been intensively studied due to their competence in reducing pollutants with conventional methods. Flowers are used as source in medicine, cosmetics and even as adsorbents for pollutant abatement. In this study, the microparticles from Chrysanthemum indicum were used as adsorbent for reducing the Congo red dye concentration from synthetic solution. Batch trials were evaluated to understand the influence of factors and optimization was carried out using central composite design. Maximum reduction (84.1%) achieved under the optimized settings of pH (1.0), adsorbent dose (300 ppm), stirring speed (150 rpm), and contact time (75 min) at initial dye concentration (150 ppm at 30 °C). Microparticle size ensured with surface morphology of the adsorbent using electron microscopy and functional groups was studied using infrared spectroscopy techniques, respectively. Regression coefficient (R 2) value was obtained as 0.956 which indicates that the predicted values were in good agreement with their corresponding experimental values for the Congo red dye adsorption. Based on the investigation, it is inferred that the Chrysanthemum indicum flower has the potential for Congo red dye reduction from aqueous solution.

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“…6 Nowadays, an interest in NiO semiconductor material is growing because of its favorable physicochemical properties for a range of applications, such as photovoltaics, supercapacitor, batteries, photocatalysis, and absorbents. [7][8][9][10][11] Similar to nickel oxide, nickel sulde is also one of the widely studied semiconductor materials due to its excellent electrocatalytic activity. 12 Due to this reason, extensive effort has been made to develop high efficient and cost-effective nickel based materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a hierarchical structured NiO/NiS composite catalyst for reduction of 4-nitrophenol and organic dyes

Zelekew

Kuo

2017

RSC Adv.

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A facile hydrothermal synthesis, adsorption kinetics and isotherms to Congo Red azo-dye from aqueous solution of NiO/graphene nanosheets adsorbent

Cited by 107 publications

References 55 publications

Phytogenic Generation of NiO Nanoparticles Using Stevia Leaf Extract and Evaluation of Their In-Vitro Antioxidant and Antimicrobial Properties

Phytogenic Generation of NiO Nanoparticles Using Stevia Leaf Extract and Evaluation of Their In-Vitro Antioxidant and Antimicrobial Properties

Chrysanthemum indicum microparticles on removal of hazardous Congo red dye using response surface methodology

Synthesis of a hierarchical structured NiO/NiS composite catalyst for reduction of 4-nitrophenol and organic dyes

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