Synthesis and characterization of ZnO-MWCNT nanocomposites for 1-butanol sensing application at room temperature

Bhat, Pratima; K, Naveen Kumar S; Nagaraju, P.

doi:10.1016/j.physb.2019.06.008

Cited by 35 publications

(15 citation statements)

References 23 publications

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“…In physics, this phenomenon is described as the bathochromic effect. The bandgap (E g ) of the Fe 3 O 4 /PVA/(C 6 H 7 O 6 Na) n was calculated using the equation αhυ = A(hυ − E g ) 1/2 , where α, h, υ, and A are the absorption coefficient, Planck's constant, the frequency, and a constant, respectively 31 . The linear part of the curve was extrapolated to the intersection with the energy axis to determine the bandgap 32 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of New Fe3O4/PVA/(C6H7O6Na)n Nanohybrid Ferrogels for Antibacterial Applications

et al. 2021

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New Fe 3 O 4 /polyvinyl alcohol (PVA)/sodium alginate (C 6 H 7 O 6 Na) n nanohybrid ferrogels for antibacterial applications were fabricated. The crystal and molecular structures along with optical and magnetic properties of the prepared samples were characterized. The antibacterial activity of the ferrogels against Bacillus subtilis and Escherichia coli was investigated using the agar dilution method. X-ray diffraction analysis showed that the Fe 3 O 4 /PVA comprised a PVA amorphous phase and a spinel-structured Fe 3 O 4 crystalline phase. The Fe 3 O 4 /PVA crystallite size was 7.5-9.9 nm and the scanning electron micrographs showed that the Fe 3 O 4 /PVA agglomerated. The ferrogels were superparamagnetic with saturation magnetizations from 14.8 × 10 −3 to 82.1 × 10 −3 emu/g. The absorption of the ferrogels showed a bathochromic effect, accompanied by an increase in the bandgap from 2.09 to 2.18 eV with increasing Fe 3 O 4 content in the ferrogels. The ferrogels demonstrated new potency as antibacterial agents against B. subtilis and E. coli, where their antibacterial performance increased with increasing Fe 3 O 4 content.

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Section: Resultsmentioning

confidence: 99%

Fabrication of New Fe3O4/PVA/(C6H7O6Na)n Nanohybrid Ferrogels for Antibacterial Applications

et al. 2021

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“…Due to CNTs’ high conductivity, electrons can effectively transfer from ammonia molecules attached by CNTs to ZnO-T, enhancing the sensing performance of the network effectively. Bhat et al [ 133 ] synthesized a ZnO-MWCNT nanocomposite. Although the sensitivity of the composite was less than that of pure ZnO, the response–recovery property was improved.…”

Section: The Methods To Improve the Propertiesmentioning

confidence: 99%

Improving Gas-Sensing Performance Based on MOS Nanomaterials: A Review

et al. 2021

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In order to solve issues of air pollution, to monitor human health, and to promote agricultural production, gas sensors have been used widely. Metal oxide semiconductor (MOS) gas sensors have become an important area of research in the field of gas sensing due to their high sensitivity, quick response time, and short recovery time for NO2, CO2, acetone, etc. In our article, we mainly focus on the gas-sensing properties of MOS gas sensors and summarize the methods that are based on the interface effect of MOS materials and micro–nanostructures to improve their performance. These methods include noble metal modification, doping, and core-shell (C-S) nanostructure. Moreover, we also describe the mechanism of these methods to analyze the advantages and disadvantages of energy barrier modulation and electron transfer for gas adsorption. Finally, we put forward a variety of research ideas based on the above methods to improve the gas-sensing properties. Some perspectives for the development of MOS gas sensors are also discussed.

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“…Zinc Oxide infrared spectra shows signature bands at 500 and 442 cm -1 attributed to Zn-O stretching. 15 The spectra of Eugenol exhibit its signature peaks at 3515, 3072 and 3002 and 1638 cm -1 , corresponding to O-H stretching, Ar-H stretching and vinyl (C=C) stretching. In addition, sharp peaks at 1610 and 1512 cm -1 were also found in eugenol, which can be due C=C stretching of the aromatic moiety and at 1265 cm -1 , which correspond to C-O stretching.…”

Section: Physiochemical Properties Of Cz Pastementioning

confidence: 99%

Evaluation of a Novel Endodontic Paste for Primary Teeth with Necrotic Pulp

Machado¹,

Oliveira²,

Carvalho³

et al. 2020

JYP

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Background: The ideal root canal filling for endodontic treatment of primary teeth with necrotic pulp must have antimicrobial activity, not cause tooth discoloration or interfere with the eruption of permanent successor teeth. This study aimed to evaluate physiochemical properties of a novel paste (CZ Paste) for endodontic treatment of primary teeth with necrotic pulp and compare its antimicrobial activity to Chloramphenicol, Tetracycline, Zinc oxide (CTZ) and Zinc Oxide eugenol (ZOE) pastes. Methods: CZ, CTZ and ZOE pastes were homogenized with eugenol at the time of testing. Fourier Transform Infrared spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) tests were performed. Antimicrobial activity was assessed using agar diffusion test (ADT), direct contact test (DCT) and bactericidal effect assessment against Staphylococcus aureus, Enterococcus faecalis and Pseudomonas aeruginosa. Results: FTIR showed that CZ paste has a similar profile to chloramphenicol spectrum and in DSC thermograms it demonstrated a slight change in endothermic transition temperature. In the ADT, CTZ paste and CZ paste presented similar inhibition zone diameters and were higher than ZOE paste (P < 0.05). All pastes inhibited the growth of tested microorganisms in DCT. Bactericidal assessment test showed that only CZ and CTZ pastes had bactericidal effect. Conclusion: CZ paste could be an alternative for endodontic treatment of primary teeth with necrotic pulp.

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Synthesis and characterization of ZnO-MWCNT nanocomposites for 1-butanol sensing application at room temperature

Cited by 35 publications

References 23 publications

Fabrication of New Fe3O4/PVA/(C6H7O6Na)n Nanohybrid Ferrogels for Antibacterial Applications

Fabrication of New Fe3O4/PVA/(C6H7O6Na)n Nanohybrid Ferrogels for Antibacterial Applications

Improving Gas-Sensing Performance Based on MOS Nanomaterials: A Review

Evaluation of a Novel Endodontic Paste for Primary Teeth with Necrotic Pulp

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