Fabrication of two perovskite-type oxide nanoparticles as the new adsorbents in efficient removal of a pesticide from aqueous solutions: Kinetic, thermodynamic, and adsorption studies

Tavakkoli, Haman; Yazdanbakhsh, Mohammad

doi:10.1016/j.micromeso.2013.03.043

Cited by 58 publications

(21 citation statements)

References 35 publications

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“…Recently, the application of ABO 3 in adsorption [12], photocatalysis [13] and Fenton-like reaction [14][15][16][17] has been reported by changing the element at A and B site. Luo et al demonstrated interesting catalytic properties of BiFeO 3 nanoparticles as Fenton-like catalyst for the degradation of Rhodamine B at pH 5.0 [14], especially for the degradation of bisphenol A in the presence of chelating agents [15].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2

Nie

Zhang

et al. 2015

Journal of Hazardous Materials

108

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Section: Introductionmentioning

confidence: 99%

Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2

Nie

Zhang

et al. 2015

Journal of Hazardous Materials

108

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“…where D hkl (nm) is the particle size perpendicular to the normal line of the (hkl) plane, k (nm) is the X-ray wavelength, b hkl is the FWHM, and h hkl (rad) is the Bragg angle of the (hkl) peak [21][22][23]. The calculated crystallite size of GSFO calcined at 700°C was about 17.3 nm.…”

Section: Xrd Analysismentioning

confidence: 99%

Synthesis of Gd0.5Sr0.5FeO3 perovskite-type nanopowders for adsorptive removal of MB dye from water

Tavakkoli

Hamedi

2015

Res Chem Intermed

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In the present study, nanoparticles of perovskite-type Gd 0.5 Sr 0.5 FeO 3 (GSFO) were fabricated by a sol-gel method. A series of analytical techniques were used to characterize the crystallinity, morphology, specific surface area and grain size of GSFO powders. The thermal decomposition process of the complex precursor was examined by means of differential thermal analysis-thermal gravimetric analysis. X-ray diffraction results showed that a single perovskite phase was completely formed after calcination at 700°C. In addition, transmission electron microscopy images revealed that the average size of the particles is approximately 35.23 nm in diameter. The surface morphology and composition of these nanopowders were also investigated using a scanning electron microscope and an energy dispersive X-ray spectrometer. GSFO nanoparticles showed excellent adsorption efficiency towards methylene blue dye in aqueous solution. The adsorption studies were carried out at different pH values, initial dye concentrations, various adsorbent doses and contact time in batch experiments. The dye removal efficiency was found to be increased with increasing the initial pH of the dye solution, and GSFO exhibited good dye removal efficiency at a basic pH, especially at a pH of 12. Experimental results indicated that the adsorption kinetic data follow a pseudo-second-order rate for the tested dye. The isotherm evaluations revealed that the Redlich-Peterson model attained better fits to the experiment's equilibrium data than the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models.

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“…Compared with the other conventional wastewater treatment means, this technology has such advantages as: 1) wide application, especially to the molecule-structure complexed contaminants which cannot be easily degraded by the traditional methods; 2) the nanoparticles itself has no toxicity to the health of our human livings and 3) it demonstrates a strong destructive power to the pollutants and can mineralize the pollutants into CO2 and H2O. Due to the excellent features of this technology, it appears promising and has drawn the attention of researchers of at home and abroad (Tavakkoli et al, 2013;Yazdanbakhsh et al, 2011;Carbajo et al, 2006).…”

Section: Tavakkoli Et Al Synthesis and Evaluation Catalytic Efficienmentioning

confidence: 99%

Synthesis and Evaluation Catalytic Efficiency of Perovskite-Type Oxide Nanopowders in Removal of Bromocresol Purple from Aqueous Solution

Tavakkoli¹,

Ghaemi²,

Mostofizadeh³

2014

IJSRK

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Abstract. A 1-x A x BO 3 belongs to the perovskite oxides of the ABO 3 structure. In this study, nanoparticles of La 0.5 Ca 0.5 FeO 3 were fabricated by sol-gel citrate technique. A series of common analytical techniques were used to characterize the crystallinity, morphology, specific surface area, and grain size of the nanopowders. These properties were characterised by means of XRD, SEM, EDX and FTIR. The calculated particles size using the Scherrer's formula was about 20 nm. Moreover, the family of perovskite-type oxides could be considered as an adsorbent/catalyst material for the removal of dyes. This study has also investigated the efficiency of La 0.5 Ca 0.5 FeO 3 , as an adsorbent for removal of dye (Bromocresol Purple (BP)), from an aqueous solution. The adsorption studies were carried out at different pH values, various adsorbent dosages and contact time in a batch experiments. The kinetic studies indicate that the removal process obeys the Pseudo-first-order kinetic equation. Also, the isotherm evaluations reveal that the adsorption of BP by the nanoparticles follows the Langmuir model. In addition, this nanoparticle with good specific affinity towards dye molecules was a promising adsorbent for dye removal from natural water.

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Fabrication of two perovskite-type oxide nanoparticles as the new adsorbents in efficient removal of a pesticide from aqueous solutions: Kinetic, thermodynamic, and adsorption studies

Cited by 58 publications

References 35 publications

Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2

Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO3 and H2O2

Synthesis of Gd0.5Sr0.5FeO3 perovskite-type nanopowders for adsorptive removal of MB dye from water

Synthesis and Evaluation Catalytic Efficiency of Perovskite-Type Oxide Nanopowders in Removal of Bromocresol Purple from Aqueous Solution

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