Synthesis of novel CdSe QDs/BiFeO3 composite catalysts and its application for the photo-Fenton catalytic degradation of phenol

Huang, Tao; Zhu, Jingjing; Ge, Shengzhuo; Guo, Tianyu; Jiang, Chongwen; Xie, Le

doi:10.1016/j.jece.2020.104384

Cited by 47 publications

(15 citation statements)

References 61 publications

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“…Moreover, the generation of hydroxyl radicals was found to be easier in an acidic medium than in a neutral or basic medium [42]. Noting that, as the solution is too acidic (pH � 3), the excess H + ions could react with hydroxyl radicals OH in the solution, leading to a deterioration in the degradation rate [17].…”

Section: Effect Of Parameters On the Photo-fenton Degradation Of Phenolmentioning

confidence: 99%

“…Under visible light irradiation, the LFO-RHT photocatalyst undergoes charge separation which produces electrons (e − ) and holes (h + ) simultaneously (equation 10). en, the electron is trapped by H 2 O 2 to form the OH as well (equation ( 11)) [17]. erefore, the considerable improvement in the rate of phenol removal benefits from the synergism of photocatalysis and heterogeneous Fenton-like reaction.…”

Section: Effect Of Parameters On the Photo-fenton Degradation Of Phenolmentioning

confidence: 99%

“…Among these AOPs, the photo-Fenton process has been found to be the most promising method in terms of the process efficiency based on organic contaminants removal and operation cost [15]. Recently, the utilization of solar energy appears to be an effective strategy for addressing environmental concerns and energy crises [16][17][18]. Considering the use of solar power, semiconductor photocatalysts, especially iron-containing photocatalysts with narrow band gap energy belonging to the perovskite family, have been developed to decompose organic pollutants under visible light irradiation [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

Phan

Nguyen

et al. 2021

Journal of Chemistry

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Mesoporous LaFeO3 as a visible light-driven photocatalyst was prepared by a nanocasting method using mesoporous silica (SBA-15) as a hard template. The as-prepared LaFeO3 photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption, X-ray photoelectron spectroscopy (XPS), and optical absorption spectra. The characterization studies and experimental results showed that LaFeO3 with porous structure caused by the removal of SBA-15 hard template could enhance the specific surface area of the resulting photocatalyst, which improves the phenol adsorption ability of the photocatalyst and in turn enhances its photo-Fenton catalytic activity. The photo-Fenton catalytic activity of the photocatalyst was investigated by photo-Fenton degradation of aqueous phenol under visible light irradiation. The effects of catalyst dosage, H2O2 concentration, and solution pH on the photo-Fenton catalytic degradation of phenol using mesoporous LaFeO3 were studied and optimized. Under the optimal conditions of 20 mg L−1 phenol, 1.0 g L−1 catalyst, and 10 mM H2O2 at pH = 5, the photo-Fenton degradation of phenol (93.47%) was achieved in 180 min under visible light irradiation. Furthermore, our results proved the stability and reusability of mesoporous LaFeO3 and revealed its catalytic mechanism for the photo-Fenton degradation of phenol.

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Section: Effect Of Parameters On the Photo-fenton Degradation Of Phenolmentioning

confidence: 99%

Section: Effect Of Parameters On the Photo-fenton Degradation Of Phenolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

Phan

Nguyen

et al. 2021

Journal of Chemistry

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“…Recently, many semiconductor-based photo-Fenton systems have been reported, mainly focusing on iron oxides (Fe 2 O 3 , Fe 3 O 4 ), 12,17 iron-containing salts (FeVO 4 , BiFeO 3 ), 18,19 and so on. These systems exhibit delightful catalytic performance; however, current iron oxide systems face two main problems: 1) poor durability owing to iron leaching under oxidation conditions and 2) the toxicity of raw materials, which severally inhibit their practical application.…”

Section: Introductionmentioning

confidence: 99%

NaFeSi₂O₆ nanocrystals as a catalyst for heterogeneous photo-Fenton degradation of organic wastewater

Zhang

et al. 2022

CrystEngComm

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“…However, the large bandgaps of these semiconductors limit them to the use of UV light, thus increasing the cost of operation. Hence, researchers have combined iron-containing materials with lower bandgap semiconductors such as CdSe, C 3 N 4 , and BiVO 4 in order to generate photocarriers under visible light irradiation and, thus, take advantage of the freely-available and unlimited solar energy [15][16][17]. However, while this is an elegant approach, the large-scale implementation of these iron-containing heterojunctions and heterostructures is hampered by the complicated multi-step chemistry required to synthesize them.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Carbon- and Nitrogen-Doped Iron Borate as a Highly Efficient Single-Component Heterogeneous Photo-Fenton Catalyst under Simulated Solar Irradiation

2021

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The development of a heterogeneous catalyst for use in environmental remediation remains a challenging and attractive research endeavor. Specifically, for Fenton reactions, most research approaches have focused on the preparation of iron-containing heterostructures as photo-Fenton catalysts that utilize visible light for enhancing the degradation efficiency. Herein, the synthesis and novel application of C,N-doped iron borates are demonstrated as single-component heterogeneous photo-Fenton catalysts with high Fenton activity under visible light. Under the optimal conditions, 10 mg of the catalyst is shown to achieve effective degradation of 10 ppm methylene blue (MB) dye, Rhodamine B (RhB) dye, and tetracycline (TC) under simulated solar irradiation with a first-order rate constant of k = 0.218 min−1, 0.177 min−1, and 0.116 min−1, respectively. Using MB as a model system, the C,N-doped iron borate exhibits 10- and 26-fold increases in catalytic activity relative to that of the 50 nm hematite nanoparticles and that of the non-doped iron borate, respectively, in the presence of H2O2 under the simulated solar irradiation. Furthermore, the optimum reaction conditions used only 320 equivalents of H2O2 with respect to the concentration of dye, rather than the several thousand equivalents of H2O2 used in conventional heterogeneous Fenton catalysts. In addition, the as-prepared C,N-doped iron borate achieves 75% MB degradation after 20 min in the dark, thus enabling the continuous degradation of pollutants at night and in areas with poor light exposure. The stability and recyclability of C,N-doped iron borate for the oxidation of MB was demonstrated over three cycles with insignificant loss in photo-Fenton activity. The high Fenton activity of the C,N-doped iron borate is considered to be due to the synergistic action between the negatively-charged borate ligands and the metal center in promoting the Fenton reaction. Moreover, carbon and nitrogen doping are shown to be critical in modifying the electronic structure and increasing the conductivity of the catalyst. In view of its synthetic simplicity, high efficiency, low cost of reagents, and minimal cost of operation (driven by natural sunlight), the as-prepared heterogeneous single-component metal borate catalyst has potential application in the industrial treatment of wastewater.

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Synthesis of novel CdSe QDs/BiFeO3 composite catalysts and its application for the photo-Fenton catalytic degradation of phenol

Cited by 47 publications

References 61 publications

Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

NaFeSi₂O₆ nanocrystals as a catalyst for heterogeneous photo-Fenton degradation of organic wastewater

Facile Synthesis of Carbon- and Nitrogen-Doped Iron Borate as a Highly Efficient Single-Component Heterogeneous Photo-Fenton Catalyst under Simulated Solar Irradiation

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Synthesis of novel CdSe QDs/BiFeO3 composite catalysts and its application for the photo-Fenton catalytic degradation of phenol

Cited by 47 publications

References 61 publications

Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

Mesoporous LaFeO3: Synergistic Effect of Adsorption and Visible Light Photo-Fenton Processes for Phenol Removal from Refinery Wastewater

NaFeSi2O6 nanocrystals as a catalyst for heterogeneous photo-Fenton degradation of organic wastewater

Facile Synthesis of Carbon- and Nitrogen-Doped Iron Borate as a Highly Efficient Single-Component Heterogeneous Photo-Fenton Catalyst under Simulated Solar Irradiation

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NaFeSi₂O₆ nanocrystals as a catalyst for heterogeneous photo-Fenton degradation of organic wastewater