Specific Adsorption and Efficient Degradation of Cylindrospermopsin on Oxygen-Vacancy Sites of BiOBr

ACS Catalysis, Год журнала: 2022, Номер 13(1), С. 445 - 458

Опубликована: Дек. 19, 2022

The oxygen-vacancy (OV)-rich BiOBr exhibits higher photocatalytic activity than that of the OV-deficient one. interaction target substrate with surface OV sites should be essential for high activity, but it is not well understood so far. Here, we used a cyanotoxin cylindrospermopsin (CYN) as model to investigate specific adsorption pollutants highly hydrophilic groups on BiOBr. We found CYN rich OVs much stronger poor OVs, and also degradation rate CYN. Various experiments indicated strong OV-rich originates from between sulfate group sites. Density functional theory calculations suggest that, sites, Brönsted acid (OHB) are formed through dissociative water molecules. combining effect hydrogen bonding these OHB coordination Lewis Bi make quite strong. Such can explain rapid CYN, which proceeds direct oxidation by h+ or OHB-derived •OH. Based ultra-performance liquid chromatography–tandem mass spectrometry analysis, begins via hydroxylation at C5–C6 double bond in uracil ring •OH, further degraded two pathways. This work provides deeper understanding critical roles processes photocatalysis organic pollutant removal.

Язык: Английский

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Visible light driven S-scheme GQDs/BiOBr heterojunction with enhanced photocatalytic degradation of Rhodamine B and mechanism insight

Journal of Water Process Engineering, Год журнала: 2023, Номер 57, С. 104588 - 104588

Опубликована: Ноя. 25, 2023

Язык: Английский

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Evaluation of tetracycline removal by magnetic metal organic framework from aqueous solutions: Adsorption isotherm, kinetics, thermodynamics, and Box-Behnken design optimization

Journal of Saudi Chemical Society, Год журнала: 2023, Номер 27(5), С. 101706 - 101706

Опубликована: Авг. 3, 2023

In our current research, an intriguing magnetic nano sorbent Fe3O4@Zr-MOF was synthesized in the lab. We used this adsorbent for successfully removing tetracycline (TC) from water. performed a number of experiments and studies to further support this, including following: vibrating sample magnetometer (VSM), Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray photoelectron (XPS), scanning electron microscope (SEM), diffraction (XRD), Brunauer-Emmett-Teller surface area (BET). Our have determined that boasts considerable 868 m2/g with highest adsorption capacity (qmax) 942.12 mg/g. Study factors effect on process such as pH, TC concentration, dose, temperature. The isotherm fitted Langmuir equation, whereas kinetic pseudo-second-order equation. chemisorption well energy 20 kJ/mol. Adsorption thermodynamics indicated both endothermic spontaneous. As temperatures increased, amounts materials absorbed also increased. has properties it easily remove solution after process. five cycles high efficiency without change chemical composition XRD same before reusability. mechanism interaction between expected on: Electrostatic interaction, π-π hydrogen bonding, pore filling. results were optimized using Box Behnken-design (BBD).

Язык: Английский

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Enhanced electrocatalytic cathodic degradation of 2,4-dichlorophenoxyacetic acid based on a synergistic effect obtained from Co single atoms and Cu nanoclusters

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 332, С. 122748 - 122748

Опубликована: Апрель 10, 2023

Язык: Английский

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Electrocatalytic degradation of p-nitrophenol on metal-free cathode: Superoxide radical (O2•−) production via molecular oxygen activation

Journal of Hazardous Materials, Год журнала: 2023, Номер 462, С. 132797 - 132797

Опубликована: Окт. 17, 2023

Язык: Английский

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Jointly augmented photocatalytic NO removal by S-scheme Bi12SiO20/Ag2MoO4 heterojunctions with surface oxygen vacancies

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 649, С. 713 - 723

Опубликована: Июнь 25, 2023

Язык: Английский

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Rapid peroxymonosulfate activation by self-assembly of layered fluorine-free MXene with nanofibrous Co3O4: Antibiotic degradation and electron transfer mechanism

Separation and Purification Technology, Год журнала: 2023, Номер 329, С. 125241 - 125241

Опубликована: Окт. 13, 2023

Язык: Английский

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Mn3O4-ZnMn2O4/SnO2 nanocomposite activated peroxymonosulfate for efficient degradation of ciprofloxacin in water

Separation and Purification Technology, Год журнала: 2023, Номер 311, С. 123342 - 123342

Опубликована: Фев. 3, 2023

Язык: Английский

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Insight into adsorption properties and mechanism of geopolymer adsorbents with inherent alkali release for tetracycline

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(3), С. 112663 - 112663

Опубликована: Апрель 5, 2024

Язык: Английский

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Highly Efficient Ultrasound-Driven Ti³⁺-Doped TiO₂ with Oxygen Vacancies: A Promising Visible-Light Catalyst for Complete Sonophotocatalytic Degradation of Tetracycline

Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(12), С. 5135 - 5147

Опубликована: Март 13, 2024

Tetracycline (TC), a widely prescribed antibiotic to treat bacterial infections in humans and animals, poses substantial threat the environment due its extensive use. To address this issue, TiO2-based photocatalyst was employed for effective sonophotocatalytic degradation of TC. The ultrasound-driven TiO2 synthesis induced oxygen vacancies Ti3+ species, enhancing efficiency. formation confirmed by using various analytical techniques. synthesized with ultrasound (TiO2 US) demonstrates remarkable TC under halogen lamp irradiation, achieving an efficiency ∼96%, 1.56 times higher than that without WUS). Under diffuse sunlight, US WUS exhibit efficiencies 95 79%, respectively. Notably, effectively degraded hospital effluent, 83% This nanophotocatalyst displays appreciable reusability stability, offering promising solution efficiently degrading persistent emerging contaminants.

Язык: Английский

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