Tuning the antimicrobial efficacy of nano-Ca(OH)2 against E. coli using molarity

Harish,; Kumar, Pushpendra; Kumari, Sapna; Debnath, Mousumi; Salim, Amena; Singhal, Rahul; Joshi, Ritesh; Mukhopadhyay, Anoop Kumar

doi:10.1007/s10853-022-07198-5

Cited by 8 publications

(11 citation statements)

References 60 publications

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“…However, in present study the chemical precipitation method was used to synthesize Ca(OH) 2 of 0.6 M molarity. It is already reported in the literature that the change in molarity also affects the antibacterial property of Ca(OH) 2 [34] . The involvement of new bacterial strains, changes in chemical synthesising mechanisms, and molarity make this study different and interesting.…”

Section: Introductionmentioning

confidence: 90%

“…However, it is also reported in the literature that a compound showing high antibacterial efficacy against gram‐negative may not necessarily show good antibacterial efficacy against other gram‐negative bacteria [17] . Table 1 summarises a pertinent survey on the antibacterial efficacy of Ca(OH) 2 against different bacterial strains [18–34] …”

Section: Introductionmentioning

confidence: 99%

“…It is already reported in the literature that the change in molarity also affects the antibacterial property of Ca(OH) 2 . [34] The involvement of new bacterial strains, changes in chemical ChemistrySelect synthesising mechanisms, and molarity make this study different and interesting. As a result, the antibacterial activity of Ca(OH) 2 is analysed against new bacterial strains and explained in terms of bacterial type, shape, and composition.…”

Section: Introductionmentioning

confidence: 99%

“…[17] Table 1 summarises a pertinent survey on the antibacterial efficacy of Ca(OH) 2 against different bacterial strains. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] In the present communication, the objective is to inspect the effect of four different bacteria, two gram-positive bacteria (Bacillus subtilis, Staphylococcus aureus) and two gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa) against Ca(OH) 2 NPs. However, for this antibacterial study, extremophilic novel species isolated from Sambhar lake viz.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Harish

Kumari²,

Parihar

et al. 2022

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Calcium hydroxide nanoparticles (Ca(OH)2 NPs) are of great interest in the development of new products due to their antibacterial properties. Chemical precipitation process was used for synthesizing Ca(OH)2 NPs. The synthesized Ca(OH)2 NPs were characterized by using X‐ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transmission Infrared Spectroscopy (FTIR), UV‐Visible spectroscopy, DLS (Dynamic Light Scattering) techniques. Ca(OH)2 NPs were assessed for antibacterial activity against gram‐positive bacteria (Bacillus subtilis, Staphylococcus aureus) and gram‐negative bacteria (Escherichia coli, Pseudomonas aeruginosa). The results showed reasonable bactericidal activity and flash out that the antibacterial activity of Ca(OH)2 had an important inhibitory activity against B. subtilis and P. aeruginosa which are gram‐positive and gram‐negative bacteria respectively. Reactive oxygen species (ROS) generation of Ca(OH)2 NPs were also studied and shows significant results against both gram negative and gram positive bacteria. From the analysis of the results, it was observed that Ca(OH)2 shows the best antibacterial activity against gram‐positive bacteria B. subtilis. Further, the possible mechanisms of antibacterial behaviour of Ca(OH)2 against each bacteria were suggested. These outcomes indicate that Ca(OH)2 could be utilized as a functional antibacterial material.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Harish

Kumari²,

Parihar

et al. 2022

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“…[4] The metal hydroxide-organic frameworks (MHOFs) for oxygen evolution reaction has been reported by Yuan et al and found that the oxygen evolution reaction activity can be enhanced by over three orders of magnitude per metal site when the Ni based MHOFs substituted with acidic cations. [5] Ca(OH) 2 has many applications in biomedical, [6,7] dental traumatology, [8,9] and Portland cement production. [10] In the ozonation of cinnamaldehyde to benzaldehyde Ca(OH) 2 is also used as a catalyst.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrate Doping on the Properties of Chemically Synthesized Calcium Hydroxide Nanoparticles

et al. 2022

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Calcium hydroxide has drawn a significant attention of current researchers due to its multifunctional applications in the field of biomedical, catalysis, and culture heritage conservation. In this work, the synthesis of calcium hydroxide was done by using the simple chemical precipitation method. The prepared calcium hydroxide was then doped with the three different concentrations e. g., 4, 7 and 10 Wt. % of calcium nitrate. The entire prepared samples were characterized by the XRD (X‐ray diffraction), FESEM (field emission scanning electron microscope), DTA‐TGA (Thermogravimetric analysis‐ Differential thermal analysis), and UV‐Vis spectroscopy techniques. From the X‐ray diffraction results, it was observed that with increase in calcium nitrate doping the crystallites size decreases from 83 nm to 70 nm. The thermal properties also varied as a function of calcium nitrate doping. Further, the UV‐Vis spectroscopy results showed the increase in optical band gap with increase in calcium nitrate doping. These results are explained in terms of structural, microstructural, thermal, and optical band gap characteristics. Finally, the implication of these results in development of a better material for thermochemical energy storage is discussed.

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Optical band gap enhancements of chemically synthesized α‐Ni(OH)₂ nanoparticles by a novel technique: Precipitator molarity variation

et al. 2022

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Nickel hydroxide nanoparticles (NHNPs) are extremely important semiconducting materials for applications in energy storage and energy harvesting devices. This study uses a novel variation in molarity of the sodium hydroxide (NaOH) precipitator solution to enhance the direct optical band gap in the NHNPs chemically synthesized by using nickel nitrate hexahydrate (Ni(NO 3 ) 2 Á6H 2 O) as the precursor. The simple, energy benign chemical precipitation route involved the usage of 1 M (Ni (NO 3 ) 2 Á6H 2 O) solutions as the precursor and 0.4 M, 0.6 M, and 0.8 M NaOH solutions as the precipitator solutions. The simple variation in precipitator molarity induces an increase in pH from about 6.9 to 7.5 of the reactant solution. As the molarity of the precursor solution does not change, the change in pH of the reactant solution is equivalent to the change in the pH of the precipitator solution. The NHNPs characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), dynamic light scattering (DLS), Fourier-transform infrared (FTIR) and ultraviolet-visible (UV-vis) techniques confirm a reduction of the nanocrystallite size from about 6.8 to 4.5 nm with a concomitant enhancement in the direct optical band gap energy from about 2.64 to 2.74 eV. The possible mechanisms that could be operative behind obtaining microstructurally tuned (MT)-NHNPs and band gap engineering (BGE) of the MT-NHNPs are discussed from both theoretical and physical process perspectives. Further, the implications of these novel results for possible future applications are briefly touched upon. The reported results might be useful to assess the material as an active electrode to improve the performance of batteries.

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Tuning the antimicrobial efficacy of nano-Ca(OH)2 against E. coli using molarity

Cited by 8 publications

References 60 publications

Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Effect of Nitrate Doping on the Properties of Chemically Synthesized Calcium Hydroxide Nanoparticles

Optical band gap enhancements of chemically synthesized α‐Ni(OH)₂ nanoparticles by a novel technique: Precipitator molarity variation

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Tuning the antimicrobial efficacy of nano-Ca(OH)2 against E. coli using molarity

Cited by 8 publications

References 60 publications

Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Synthesis, Characterization, and Antibacterial Activity of Calcium Hydroxide Nanoparticles Against Gram‐Positive and Gram‐Negative Bacteria

Effect of Nitrate Doping on the Properties of Chemically Synthesized Calcium Hydroxide Nanoparticles

Optical band gap enhancements of chemically synthesized α‐Ni(OH)2 nanoparticles by a novel technique: Precipitator molarity variation

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Product

Resources

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Optical band gap enhancements of chemically synthesized α‐Ni(OH)₂ nanoparticles by a novel technique: Precipitator molarity variation