Photocatalytic degradation of Rhodamine B by zinc oxide nanoparticles synthesized using the leaf extract of Cyanometra ramiflora

Varadavenkatesan, Thivaharan; Lyubchik, Elizaveta; Pai, Sathish; Pugazhendhi, Arivalagan; Vinayagam, Ramesh; Selvaraj, Raja

doi:10.1016/j.jphotobiol.2019.111621

Cited by 219 publications

(65 citation statements)

References 40 publications

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“…A study that synthesized ZnO nanoflowers using Calliandra haematocephala (Vinayagam et al, 2020) showed that synthesized nanoparticles had an excellent photodegradation ability against methylene blue dye and they concluded that 88% of the dye could be degraded within 270 min. A similar study using a leaf extract of Cyanometraramiflora to synthesize ZnO nanoparticles showed that the degradation efficiency of pollutant dye Rhodamine B was 98% within 200 min under the influence of sunlight irradiation (Varadavenkatesan et al, 2019). In our study, after 80 mins, ∼ 90% of MO degradation was observed which was evident in both the absorbance peak intensity at 463 nm and the visual color observation.…”

Section: Photocatalytic Degradation Potentialsupporting

confidence: 75%

Microbial Fabrication of Zinc Oxide Nanoparticles and Evaluation of Their Antimicrobial and Photocatalytic Properties

et al. 2020

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Zinc oxide (ZnO) nanoparticles have attracted significant interest in a number of applications ranging from electronics to biomedical sciences due to their large exaction binding energy (60 meV) and wide bandgap of 3.37 eV. In the present study, we report the low-cost bacterium based "eco-friendly" efficient synthesis of ZnO nanoparticles by using the zinc-tolerant bacteria Serratia nematodiphila. The physicochemical characterization of ZnO nanoparticles was performed by employing UV-vis spectroscopy, XRD, TEM, DLS, Zeta potential, and Raman spectroscopy. The antimicrobial and antifungal studies were investigated at different concentrations using the agar well-diffusion method, whereby the microbial growth rate decreases with the increase in nanoparticle concentration. Further, photocatalytic performance studies were conducted by taking methyl orange (MO) as a reference dye.

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Section: Photocatalytic Degradation Potentialsupporting

confidence: 75%

Microbial Fabrication of Zinc Oxide Nanoparticles and Evaluation of Their Antimicrobial and Photocatalytic Properties

et al. 2020

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“…Iron oxide NPs produce hydroxyl radical (•OH) under sunlight radiation which are reposnsible for the degradation of remazol yellow RR dye and the probable degradation mechanism is shown in Figure 8 . Generally, when NPs were irradiated under sulight, an electron (e − ) and hole (h + ) pair is produced ( Varadavenkatesan et al., 2019 , Varadavenkatesan et al., 2019 ). The produced electron is excited from the valence band to the conduction band, leaving the h + in the valence band.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of iron oxide nanoparticle using Carica papaya leaf extract: application for photocatalytic degradation of remazol yellow RR dye and antibacterial activity

Bhuiyan

Miah

Paul

et al. 2020

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Synthesis of iron oxide nanoparticles by the recently developed green approach is extremely promising because of its non-toxicity and environmentally friendly behavior. In this study, nano scaled iron oxide particles (α-Fe 2 O 3 ) were synthesized from hexahydrate ferric chloride (FeCl 3 .6H 2 O) with the addition of papaya ( Carica papaya ) leaf extract under atmospheric conditions. The synthesis of iron oxide nanoparticles was confirmed by systematic characterization using FTIR, XRD, FESEM, EDX and TGA studies. The removal efficiency of remazol yellow RR dye with the synthesized iron oxide nanoparticles as a photocatalyst was determined along with emphasizing on the parameters of catalyst dosage, initial dye concentration and pH. Increasing the dose of iron oxide nanoparticles enhanced the decolorization of the dyes and a maximum 76.6% dye degradation was occurred at pH 2 after 6 h at a catalyst dose of 0.8 g/L. Unit removal capacity of the photocatalyst was found to be 340 mg/g at dye concentration of 70 ppm and at a catalyst dose of 0.4 g/L. The synthesized nanoparticles showed moderate antibacterial activity against Klebsiella spp. , E.Coli , Pseudomonas spp. , S.aureus bacterial strains. Although the cytotoxic effect of nanoparticles against Hela, BHK-21 and Vero cell line was found to be toxic at maximum doses but it can be considered for tumor cell damage because it showed excellent activity against the Hela and BHK-21 cell lines.

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“…Figure 2 presents the UV-Vis absorption spectra of ZnO nanoparticles, ZnO-Ag and ZnO-Cu nanocomposites and the dye. There is an excitonic peak between 206 nm for the dyes and 251 nm for the ZnO-Ag, these peaks are characteristic of the polyphenolic compounds which acted actively during the synthetic and reduction processes between the phyto-compounds of B. ferruginea, and metal precursors [42]. These peaks also pointed to presence of ZnO nanoparticles, which lies much below the bandgap wavelength [41].…”

Section: Ftir Spectroscopy Of the Synthesized Nanoparticles And Nanocmentioning

confidence: 93%

Green synthesis of zinc oxide nanoparticles and zinc oxide–silver, zinc oxide–copper nanocomposites using Bridelia ferruginea as biotemplate

et al. 2020

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The quest to synthesize nanomaterials with improved properties, but less undesirable effects on the environment necessitated this research. Zinc Oxide (ZnO) nanoparticles and zinc oxide-silver (ZnO-Ag), zinc oxide-copper (ZnO-Cu) nanocomposites were synthesized with pure eco-friendly dye extracted from Bridelia ferruginea, zinc acetate (Zn(CH 3 COO) 2 ) as host, copper acetate (Cu (CH 3 COO) 2 ), and silver nitrate (AgNO 3 ) as dopant precursors. Phytochemical screening of dyes showed high, presence of phenols and terpenoids. The nanomaterials were characterized by Fourier-transform infrared, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy and ultraviolet-visible spectroscopy. The results showed the capping agents in the dyes were responsible for reducing the bulk materials. The crystallinity of the nanomaterials were found to be 19.02, 18.98 and 18.90 nm for the ZnO, ZnO-Ag and ZnO-Cu nanoparticles respectively. The ZnO nanoparticles were flakelike in shape, whereas the Cu and Ag doped particles were spherical. An optical bandgap of 4.73 eV was recorded for the dye and 3.24 eV for the ZnO nanoparticles. This was narrowed to 3.18 and 3.13 eV by silver and copper dopant respectively. These results showed the nanoparticles as a potential agent for photovoltaics and other optical applications.

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Photocatalytic degradation of Rhodamine B by zinc oxide nanoparticles synthesized using the leaf extract of Cyanometra ramiflora

Cited by 219 publications

References 40 publications

Microbial Fabrication of Zinc Oxide Nanoparticles and Evaluation of Their Antimicrobial and Photocatalytic Properties

Microbial Fabrication of Zinc Oxide Nanoparticles and Evaluation of Their Antimicrobial and Photocatalytic Properties

Green synthesis of iron oxide nanoparticle using Carica papaya leaf extract: application for photocatalytic degradation of remazol yellow RR dye and antibacterial activity

Green synthesis of zinc oxide nanoparticles and zinc oxide–silver, zinc oxide–copper nanocomposites using Bridelia ferruginea as biotemplate

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