La-doped ZnO nanoflower as photocatalyst for methylene blue dye degradation under UV irradiation

Hemalatha, Pushparaj; Karthick, S.; Hemalatha, K.; Yi, Moonsuk; Kim, Hee-Je; Alagar, M.

doi:10.1007/s10854-015-4034-8

Cited by 56 publications

(26 citation statements)

References 47 publications

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“…The peak broadening relates to crystallite size ( D ) according to the following Scherrer's equation:

D = \frac{0.9 λ}{β normalc normalo normals ϴ}

where λ is the wavelength of the X‐ray (λ = 0.154 nm), ϴ is the diffraction angle in degree and β is the full‐width at half maximum in radian. By Eu and Eu/Sr‐substituted HA, the average crystallite size was found to be in the range of 35–44 nm (Table ).…”

Section: Resultsmentioning

confidence: 99%

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

et al. 2017

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In the present investigation, we have successfully synthesized luminescent Eu -doped and Eu /Sr codoped hydroxyapatite (HA) nanoparticles through sol-gel assisted precipitation method with the aim of developing novel biomaterials containing osteoblast mineral (Sr ) and luminescence activator (Eu ). The structure, morphology, thermal stability, and luminescence properties of the resultant spherical nanoparticles (50-100 nm diameters) were studied. Moreover, the in-vitro bioactivity of Eu Sr HA nanoparticles was investigated by immersing in the simulated body fluid for many weeks. The antimicrobial activity results against gram positive and gram negative bacterial stains, showed better resistivity for the Eu Sr HA among the other compositions. The MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay of live/dead cells cultured with Eu /Sr -doped HA nanoparticles retained its normal morphology and did not show a significant impact on cell proliferation at various incubation days, which evidence for the material's superior biocompatible nature even at a higher concentration of 375 µg/mL. Thus, the incorporation of dual ions in HA nanoparticles with strong luminescence properties develops potential biomaterial for live cell imaging and in nanomedicine. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2191-2201, 2018.

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“…The peak broadening relates to crystallite size ( D ) according to the following Scherrer's equation:

D = \frac{0.9 λ}{β normalc normalo normals ϴ}

Section: Resultsmentioning

confidence: 99%

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

et al. 2017

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“…Ce-doped ZnO nanomaterials were synthesized by the previously reported microwave-assisted sol-gel method [33]. The reagents used were obtained from Sigma Aldrich, and were used as such.…”

Section: Preparation Of Photocatalystsmentioning

confidence: 99%

“…For the preparation, specific amounts of Zn(CH 3 COO) 2 •2H 2 O and cerium(III) chloride heptahydrate (Ce(Cl) 3 •7H 2 O) were dissolved in a solution containing 0.5 g polyvinylpyrrolidone, 3 ml monoethanolamine and 47 ml deionized water. After continuous stirring on a magnetic stirrer, the whole solution in an autoclave was subjected to irradiation with a microwave power of 300 W [33]. The final suspension obtained after a specific period of irradiation was filtered, washed, dried and calcined for 2 h at 400 • C to obtain Ce-doped ZnO.…”

Section: Preparation Of Photocatalystsmentioning

confidence: 99%

Effect of cerium doping on the optical and photocatalytic properties of ZnO nanoflowers

2019

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Photocatalytic performances of the synthesized cerium doped (Ce-doped) ZnO nanoflowers are reported in this work. A microwave-assisted sol-gel method is adopted for the synthesis of the nanomaterial and its structural and morphological features are characterized. While doping, the Ce 3+ ions occupy the sites of Zn 2+ ions in the hexagonal ZnO lattice, which is investigated by means of X-ray diffraction studies and energy dispersive X-ray analysis. At higher Ce 3+ concentrations, ultraviolet (UV) light absorption is quite high as evidenced by the UV-Vis absorption spectra. The photoluminescence study demonstrates higher oxygen vacancy and zinc interstitials for the Ce-doped ZnO compared to the undoped ZnO. Ce-doping improves the electrical properties of the sample as well. Finally, it is established that the Ce-doped ZnO nanoflower is highly efficient in UV degrading the methylene blue organic dye.

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“…The pure SnO 2 nanoparticles could just degrade 13% of the dye after 120 min however for 1%, 2%, and 3% Mndoped SnO 2 nanoparticles, the degradation was 20%, 38%, and 59% respectively. More active sites were generated for Mn dopant which improved the degradation of R hB dye [41]. At room temperature, the dielectric constant of the pure and Mn-doped SnO 2 NPs was determined under different frequency level and illustrated by Figure 11.…”

Section: Sagadevan Et Almentioning

confidence: 99%

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Sagadevan¹,

Johan²,

Aziz³

et al. 2019

Journal of Nanoelectronics and Optoelectronics

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A simple, facile co-precipitation technique was successfully used to synthesize the pure, and Mn-doped SnO 2 nanoparticles (NPs) and characterized by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR)), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy and photoluminescence (PL). XRD analysis indicated that the prepared samples have the pure tetragonal structure of SnO 2. The doping of Mn on SnO 2 surface enhances the crystallite size of the SnO 2 NPs. The polycrystalline in nature SnO 2 nanoparticles was confirmed by SAED pattern. FT-IR analysis illustrates the presence of stretching vibration of the O-Sn-O bond in both SnO 2 and Mn-doped SnO 2 NPs. SEM and TEM analysis shows that the SnO 2 particles are spherical in shape and are uniformly dispersed inside the nanocomposite matrix. The average particle size of SnO 2 in pure SnO 2 and Mn-doped SnO 2 NPs was determined as~14 and 12 nm respectively. The optical analysis confirmed a redshift by doping Mn on SnO 2. The band gap energy for pure SnO 2 and Mn-doped SnO 2 NPs are 3.14 eV to 2.87 eV, respectively. The visible emission was observed from PL analysis. Photocatalytic activity of the pure SnO 2 and Mn-doped SnO 2 are tested using Rhodamine B (RhB) dye as a model compound under UV light. The results revealed that the Mn-doped SnO 2 NPs exhibited higher efficiency than pure SnO 2 for the degradation of RhB dye and furthermore with increasing the amount of Mn doping further enhanced the degradation rate of R hB dye. The synthesized samples present good reusable stability. Dielectric loss of the prepared pure and Mn-doped SnO 2 NPs exhibited a linear trend at higher frequency domain. Increased dopant amount reduced the ac conductivity which is attributed to the particle size effect with the presence of the impurities.

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La-doped ZnO nanoflower as photocatalyst for methylene blue dye degradation under UV irradiation

Cited by 56 publications

References 47 publications

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

Effect of cerium doping on the optical and photocatalytic properties of ZnO nanoflowers

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

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La-doped ZnO nanoflower as photocatalyst for methylene blue dye degradation under UV irradiation

Cited by 56 publications

References 47 publications

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu3+/Sr2+ dual‐doped nano‐hydroxyapatite for biomedical applications

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu3+/Sr2+ dual‐doped nano‐hydroxyapatite for biomedical applications

Effect of cerium doping on the optical and photocatalytic properties of ZnO nanoflowers

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

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In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications