Using wood flour waste to produce biochar as the support to enhance the visible-light photocatalytic performance of BiOBr for organic and inorganic contaminants removal

Geng, Aobo; Xu, Lijie; Gan, Lu; Mei, Changtong; Wang, Linjie; Fang, Xingyu; Li, Meirun; Pan, Mingzhu; Han, Shuguang; Cui, Juqing

doi:10.1016/j.chemosphere.2020.126291

Cited by 72 publications

(19 citation statements)

References 39 publications

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“…The figure also confirmed that the biochar was amorphous carbon because there was no clear and sharp peak. 32 As the amount of biochar increased, the peaks of C/BiOBr did not change obviously, indicating that biochar synthesis might occur on different exposed surfaces.…”

Section: Resultsmentioning

confidence: 93%

Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

et al. 2021

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Section: Resultsmentioning

confidence: 93%

Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

et al. 2021

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“…On the other hand, the reduction reaction is responsible for eliminating the inorganic pollutant, in our case Cr(IV). The electrons (e − ) in the conduction band reacted directly with Cr(VI) and reduced it to a lower valence state, Cr (III) [ 25 , 63 , 64 ]. This reduction reaction can minimize the risk of Cr(IV) by turning it into Cr (III) [ 1 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The e − can also react and reduce oxygen molecules present in the solution, leading to the formation of superoxide radical O2 • . These O2 • species can also participate in the degradation of organic pollutants through direct reaction with the pollutant but it is not an efficient [64] or indirect reaction as it undergoes a reaction that generates OH [1]. When a light source (energy more than the bandgap) is exposed and exceeds the photocatalyst, electrons (e − ) and holes (h + ) occur in the conduction band (CB) and valance band (VB), respectively [1].…”

Section: Proposed Mechanism Of the Photocatalytic Removalmentioning

confidence: 99%

“…• species can also participate in the degradation of organic pollutants through direct reaction with the pollutant but it is not an efficient [64] or indirect reaction as it undergoes a reaction that generates OH [1].…”

Section: Proposed Mechanism Of the Photocatalytic Removalmentioning

confidence: 99%

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Application of Bi12ZnO20 Sillenite as an Efficient Photocatalyst for Wastewater Treatment: Removal of Both Organic and Inorganic Compounds

et al. 2021

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This work aims to synthesize and characterize a material that can be used as an effective catalyst for photocatalytic application to remove both organic and inorganic compounds from wastewater. In this context, sillenite Bi12ZnO20 (BZO) in a pure phase was synthesized using the sol–gel method. Before calcination, differential scanning calorimetry (DSC) analysis was done to determine the temperature of the formation of the sillenite phase, which was found to be 800 °C. After calcination, the phase was identified by X-ray diffraction (XRD) and then refined using the Rietveld refinement technique. The results prove that BZO crystals have a cubic symmetry with the space group I23 (N°197); the lattice parameters of the structure were also determined. From the crystalline size, the surface area was estimated using the Brunauer-Emmett-Teller (BET) method, which was found to be 11.22 m2/g. The formation of sillenite was also checked using the Raman technique. The morphology of the crystals was visualized using electron scanning microscope (SEM) analysis. After that, the optical properties of BZO were investigated by diffuse reflectance spectroscopy (DRS) and photoluminescence (PL); an optical gap of 2.9 eV was found. In the final step, the photocatalytic activity of the BZO crystals was evaluated for the removal of inorganic and organic pollutants, namely hexavalent chromium Cr(VI) and Cefixime (CFX). An efficient removal rate was achieved for both contaminants within only 3 h, with a 94.34% degradation rate for CFX and a 77.19% reduction rate for Cr(VI). Additionally, a kinetic study was carried out using a first-order model, and the results showed that the kinetic properties are compatible with this model. According to these findings, we can conclude that the sillenite BZO can be used as an efficient photocatalyst for wastewater treatment by eliminating both organic and inorganic compounds.

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Coral-like ZnO/BiOBr Z-scheme heterojunction with excellent visible-light photocatalytic activity

Zhang

Liao

et al. 2022

Appl. Phys. A

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Using wood flour waste to produce biochar as the support to enhance the visible-light photocatalytic performance of BiOBr for organic and inorganic contaminants removal

Cited by 72 publications

References 39 publications

Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

Application of Bi12ZnO20 Sillenite as an Efficient Photocatalyst for Wastewater Treatment: Removal of Both Organic and Inorganic Compounds

Coral-like ZnO/BiOBr Z-scheme heterojunction with excellent visible-light photocatalytic activity

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