Removal of Congo red dye from aqueous medium by its catalytic reduction using sodium borohydride in the presence of various inorganic nano-catalysts: A review

Naseem, Khalida; Farooqi, Zahoor H.; Begum, Robina; Irfan, Ahmad

doi:10.1016/j.jclepro.2018.03.209

Cited by 217 publications

(76 citation statements)

References 39 publications

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“…A similar impressive adsorption capacity of metal oxide nanoparticles and other compounds to various organic compounds has been documented by many researchers [133][134][135][136][137][138]. A significant increase in catalytic activity was found in some metal oxides in the transition to the nanoparticles [138][139][140].…”

Section: Features Of Chemical and Physicalsupporting

confidence: 56%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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The features of the properties and creation of nanocomposite metal oxide materials, especially TiO2, ZnO, SnO2, ZrO2, and Fe3O4, and their applications for ecology are considered in the article. It is shown that nanomaterials based on them are very promising for use in the ecological direction, especially as sorbents, photocatalysts, and sensitive layers of gas sensors. The crystallochemical characteristics, surface structure, and surface phenomena that occur when they enter the water and air environment are given for these metal oxides, and it is shown that they play a significant role in obtaining the sorption and catalytic characteristics of these nanomaterials. Particular attention is paid to the dispersion and morphology of metal oxide particles by which their physical and chemical properties can be controlled. Synthesis methods of metal oxide nanomaterials and ways for creating of nanocomposites based on them are characterized, and it is noted that there are many methods for obtaining individual nanoparticles of metal oxides with certain properties. The main task is the correct selection and testing of parameters. The prospects for the production of metal oxide nanocomposites and their application for environmental applications are noted, which will lead to a fundamentally new class of materials and new environmental technologies with their participation.

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Section: Features Of Chemical and Physicalsupporting

confidence: 56%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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“…The BH 4 +1 acts as a carrier of hydrogen. The hydrogen attacks the dye molecules after the BH 4 +1 transfer electrons from them to the catalyst [58]. As a result of electron carriers, the catalyst nanoparticles activate the -N=N-bonds in the dye molecules.…”

Section: Resultsmentioning

confidence: 99%

NiO powder synthesized through nickel metal complex degradation for water treatment

Kavitha¹,

Kumar²,

Prasad³

et al. 2019

DWT

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a b s t r a c tThis study was aimed to synthesize nickel oxide (NiO) powder and its subsequent use in bactericidal activities by exploring the role of interaction at nanoparticle-bacteria interface of E. coli (gram negative) microorganism as well as water treatment by catalysing the two toxic azo dyes reduction reactions by sodium borohydride. The NiO nanoparticles were synthesized through single-step, residue free, in situ thermal decomposition method. Their size, structural and morphological features were confirmed through various analytical tools. An average size of 7-8 nm, high crystallinity and cubic crystal structure of the synthesized nanoparticles was confirmed by XRD and HR-TEM analyses. The NiO nanoparticles revealed virtuous bactericidal activities against pathogenic E. coli. Field emission scanning electron microscopy images were used as the evidence of the cell wall deterioration. The prepared NiO nanoparticles were also used in the catalytic reduction reactions of methyl orange (MO) and congo red (CR) dyes by sodium tetra-borohydrate. The reaction rate constants for the MO and CR were 0.4989 and 0.298 min -1 , respectively. The reaction mechanism, comparison with other catalyst and recyclability of the NiO were discussed.

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Section: Introductionmentioning

confidence: 99%

“…The Congo red (CR, sodium salt of benzidinediazo-bis-1-naphthylamine-4-sulfonic acid) is a water soluble anionic diazo dye with beneficial aspects such as the detection of amyloidosis, however is also characterized by being carcinogenic and high toxicity [1]. It is widely used in different industries such as textiles, plastics, rubbers, printing, leather, paper, pharmaceutical, food and cosmetics, where a large amount of this dye is released into the aquatic system causing serious pollution problems and generating a major challenge for the agencies of environmental protection [1]. This challenge is increasing due to the high chemical recalcitrance of the CR generated by its aromatic structure with rings of benzene and naphthalene, which gives it a high optical, thermal and physicochemical stability making it difficult to achieve the degradation of the CR by conventional methods [2].…”

Section: Introductionmentioning

confidence: 99%

Physical-chemical characterization of metal hydroxides sludge waste obtained from electrocoagulation processes and its application as adsorbent for organic pollutants removal in aqueous solution

García-Gómez¹,

Vidales-Contreras²,

Márquez-Reyes³

et al. 2019

DWT

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The present work aims at the reuse of metal hydroxide sludge generated by an electrocoagulation process. Its application in the adsorption of pollutants present in aqueous medium is also studied using Congo red as a molecule model and batch reactors. The characterization results demonstrate the presence of the boehmite phase with acceptable textural properties as adsorbent and high stability under different pH conditions. During the adsorption tests, it was shown that both, the pH and the initial concentration, produces a negative influence in the percentage of Congo red retention attributed to the electrostatic repulsion between OHand Congo red at high pH values on one hand and the absence of active sites at high concentration levels on the other hand. On the contrary, the increase in Congo red adsorption was proportional to the temperature associated with the thermodynamic characteristics of the adsorption process that are also presented in this work. The performance of the adsorption followed a second-order kinetics that indicates that adsorption followed a cation exchange process between the adsorbent and adsorbate; besides that different models were applied (Freundlich, Langmuir and Temkin), the Freundlich model described the better adsorption process of Congo red indicating adsorption on a heterogeneous surface and multilayer formation.

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Removal of Congo red dye from aqueous medium by its catalytic reduction using sodium borohydride in the presence of various inorganic nano-catalysts: A review

Cited by 217 publications

References 39 publications

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

NiO powder synthesized through nickel metal complex degradation for water treatment

Physical-chemical characterization of metal hydroxides sludge waste obtained from electrocoagulation processes and its application as adsorbent for organic pollutants removal in aqueous solution

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