Synthesis and characterization of Bi1.56Sb1.48Co0.96O7 pyrochlore sun-light-responsive photocatalyst

Naceur, Benhadria; Abdelkader, Elaziouti; Nadjia, Laouedj; Sellami, Mayouf; Bettahar, Noureddine

doi:10.1016/j.materresbull.2015.11.012

Cited by 11 publications

(4 citation statements)

References 72 publications

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“…Furthermore, the peak shift at 1665–1600 cm −1 (-NH 2 bending mode) reflected the interaction between the Fe 3+ ion and -NH 2 group [ 23 ]. Moreover, the hydroxyl and carboxyl bands in the spectrum of MIL-125-CS-Pb were better defined than those in the spectrum of pure MIL-125-CS, which implied that Pb(II) was embedded through interactions with both the O–H and COO− units [ 24 ]. Reportedly, the stretching and torsional vibrations of these functional groups weaken with the increasing ionic volume, thus resulting in an altered adsorption maximal [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Liang

Wang

et al. 2018

Molecules

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In this study, novel composite titanium-based metal-organic framework (MOF) beads were synthesized from titanium based metal organic framework MIL-125 and chitosan (CS) and used to remove Pb(II) from wastewater. The MIL-125-CS beads were prepared by combining the titanium-based MIL-125 MOF and chitosan using a template-free solvothermal approach under ambient conditions. The surface and elemental properties of these beads were analyzed using scanning electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopies, as well as thermal gravimetric analysis. Moreover, a series of experiments designed to determine the influences of factors such as initial Pb(II) concentration, pH, reaction time and adsorption temperature was conducted. Notably, it was found that the adsorption of Pb(II) onto the MIL-125-CS beads reached equilibrium in 180 min to a level of 407.50 mg/g at ambient temperature. In addition, kinetic and equilibrium experiments provided data that were fit to the Langmuir isotherm model and pseudo-second-order kinetics. Furthermore, reusability tests showed that MIL-125-CS retained 85% of its Pb(II)-removal capacity after five reuse cycles. All in all, we believe that the developed MIL-125-CS beads are a promising adsorbent material for the remediation of environmental water polluted by heavy metal ions.

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Section: Resultsmentioning

confidence: 99%

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Liang

Wang

et al. 2018

Molecules

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“…Such a feature has already been reported by several authors for other rutile-type phases. 40,46 The substitution by bismuth does not affect the formation of these phases except at high content, where the precipitation of a new antimonate phase is observed. With the substitution of Sb by Bi in the VSb 1− x Bi x O 4 solid solution, a decrease of V 3+ and V 4+ content and an increase of V 5+ occur.…”

Section: Resultsmentioning

confidence: 98%

“…39) Bi 1.5 Sb 1.5− x Nb x CuO 7 (ref. 40) or Bi 1.56 Sb 1.48 Co 0.96 O 7 . 41 An average of five EDX analyses was carried out for the two phases constituting the VSb 0.8 Bi 0.2 O 4 solid.…”

Section: Resultsmentioning

confidence: 99%

Dissecting the role of Bi and Ba in the catalytic efficiency of VSbBiBa/Al₂O₃ catalysts in oxidative dehydrogenation and oxidation of propane

Bouzeggane¹,

Bargiela²,

Aouine³

et al. 2023

Catal. Sci. Technol.

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“…Upon illumination by LED 15 W, electrons (e -) in adsorbed RhB-homo (+ 0.95 V/NHE) are excited to RhB*-lumo (-1.42 V/NHE) (Eq. ( 10)) [60]. Based on the band edge position, the electrons (e -) are injected from adsorbed RhB*-lumo into CB of an adjacent WO3, thus generating dye cationic radical RhB • + (Eq.…”

Section: Mechanism Of Photocatalytic Degradationmentioning

confidence: 99%

Solvothermal synthesis and characterization of monoclinic WO3 nanoplatelets: investigation of their photocatalytic performance

et al. 2022

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An original, facile way based on a non-aqueous sol-gel solvothermal process has been developed to synthesize 2D tungsten trioxide (WO3) nanoplatelets in one pot. The reaction between Tungstic acid (H2WO4) and 1-hexanol was a simple process, which resulted in the formation of highly crystalline metal oxide based on WO3 with an average size ranging between 30 and 50 nm, and with a correspondingly high surface area. The structural, morphological, functional group, optical qualities of the materials and the properties of the adsorption surfaces were all examined , and the degree of surface hydroxyls ( -OH groups) has been examined. The products of the reaction were characterized by X-ray Powder Diffraction, Scanning Electron Microscopy, Transmission Electron Microscopy, Nitrogen adsorption ,and pore-size distribution Brunauer-Emmett-Teller, Fourier Transform Infrared Spectroscopy and Nuclear Magnetic Resonance Spectroscopy techniques. which indicated the formation of di-hexyl ether as a result of the solvothermal reaction.The optical absorption, measured using UV-Vis Diffuse Reflectance Spectroscopy, revealed a narrow bandgap (Eg = 2.18 and 2.48 eV for WO3-24 and WO3-48, respectively) compared to that of for bulk WO3 (2.7 eV), attributable to oxygen vacancies. Upon increasing dwell time from 24 to 48 h, a blue-shift was observed, highlighting a quantum size effect. The as-prepared WO3 nanoplatelets displayed excellent photocatalytic performance for degrading Rhodamine B under visible light-emitting diode light with up 99 % degradation rate was achieved in 120 min. Thus, the enhanced Rhodamine B photodegradation in the presence WO3-24 along with H2O2 was assigned to the reactive oxygen species (ROS) such as • OH and RhB *+ , involving in the strong synergistic effect between WO3 and H2O2, effectively separating of photocarriers and, as a consequence, boosting the photocatalytic efficiency.

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Synthesis and characterization of Bi1.56Sb1.48Co0.96O7 pyrochlore sun-light-responsive photocatalyst

Cited by 11 publications

References 72 publications

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Dissecting the role of Bi and Ba in the catalytic efficiency of VSbBiBa/Al₂O₃ catalysts in oxidative dehydrogenation and oxidation of propane

Solvothermal synthesis and characterization of monoclinic WO3 nanoplatelets: investigation of their photocatalytic performance

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Synthesis and characterization of Bi1.56Sb1.48Co0.96O7 pyrochlore sun-light-responsive photocatalyst

Cited by 11 publications

References 72 publications

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

Dissecting the role of Bi and Ba in the catalytic efficiency of VSbBiBa/Al2O3 catalysts in oxidative dehydrogenation and oxidation of propane

Solvothermal synthesis and characterization of monoclinic WO3 nanoplatelets: investigation of their photocatalytic performance

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Dissecting the role of Bi and Ba in the catalytic efficiency of VSbBiBa/Al₂O₃ catalysts in oxidative dehydrogenation and oxidation of propane