Construction of S-scheme Bi2WO6/g-C3N4 heterostructure nanosheets with enhanced visible-light photocatalytic degradation for ammonium dinitramide

Journal of Hazardous Materials, Год журнала: 2021, Номер 412, С. 125217 - 125217

Опубликована: Янв. 23, 2021

Язык: Английский

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Enhanced adsorption and reduction performance of nitrate by Fe–Pd–Fe3O4 embedded multi-walled carbon nanotubes

Chemosphere, Год журнала: 2021, Номер 281, С. 130718 - 130718

Опубликована: Май 14, 2021

Язык: Английский

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Modification strategies for visible-light photocatalysts and their performance-enhancing effects on photocatalytic degradation of volatile organic compounds

Renewable and Sustainable Energy Reviews, Год журнала: 2023, Номер 189, С. 113948 - 113948

Опубликована: Окт. 29, 2023

Язык: Английский

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Formaldehyde Ambient-Temperature Decomposition over Pd/Mn₃O₄–MnO Driven by Active Sites’ Self-Tandem Catalysis

Environmental Science & Technology, Год журнала: 2024, Номер 58(3), С. 1752 - 1762

Опубликована: Янв. 8, 2024

The widespread presence of formaldehyde (HCHO) pollutant has aroused significant environmental and health concerns. catalytic oxidation HCHO into CO2 H2O at ambient temperature is regarded as one the most efficacious environmentally friendly approaches; to achieve this, however, accelerating intermediate formate species formation decomposition remains an ongoing obstacle. Herein, a unique tandem system with outstanding performance in low-temperature proposed on well-structured Pd/Mn3O4–MnO catalysts possessing bifunctional centers. Notably, optimized catalyst achieves complete 100 ppm just 18 °C, much better than Pd/Mn3O4 (30%) Pd/MnO (27%) counterparts well other physical catalysts. operando analyses investigations reveal that primarily activated gaseous HCOOH surface subsequently converted H2CO3 component for deep decomposition. Theoretical studies disclose exhibits favorable reaction energy barrier → step compared Pd/MnO; while conversely, more facilely accomplished over Pd/MnO. Furthermore, nanoscale intimacy between two components enhances mobility lattice oxygen, thereby facilitating interfacial reconstruction promoting interaction active sites local vicinity, which further benefits sustained oxidation. catalysis demonstrated this work provides generalizable platform future design well-defined functional reactions.

Язык: Английский

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Double-Solvent-Induced Derivatization of Bi-MOF to Vacancy-Rich Bi₄O₅Br₂: Toward Efficient Photocatalytic Degradation of Ciprofloxacin in Water and HCHO Gas

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(6), С. 7080 - 7096

Опубликована: Янв. 31, 2024

MOF-derived photocatalytic materials have potential in degrading ciprofloxacin (CIP) water and HCHO gas pollutants. Novel derivatization means defect regulation are effective techniques for improving the performance of photocatalysis. Vacancy-rich Bi4O5Br2 (MBO-x) were derived one step from Bi-MOF (CAU-17) by a modified double-solvent method. MBO-50 produced more oxygen vacancies due to combined effect CAU-17 precursor double solvents. The MBO was evaluated CIP HCHO. Thanks favorable morphology vacancy structure, demonstrated best efficiency, with 97.0% removal (20 mg L–1) 90.1% (6.5 ppm) at 60 min light irradiation. EIS Nyquist measurement, transient photocurrent response, photoluminescence spectra, calculation energy band information indicated that sites can effectively capture photoexcited electrons during charge transfer process, thus limiting recombination holes, making it easier produce superoxide anion radical (·O2–) degrade improvement degradation bromine generation filling mechanism discussed detail. This work provides promising new idea modulation materials.

Язык: Английский

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Phenolic compounds degradation: Insight into the role and evidence of oxygen vacancy defects engineering on nanomaterials

The Science of The Total Environment, Год журнала: 2021, Номер 800, С. 149410 - 149410

Опубликована: Авг. 2, 2021

Язык: Английский

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Swellable Array Strategy Based on Designed Flexible Double Hypercross-linked Polymers for Synergistic Adsorption of Toluene and Formaldehyde

Environmental Science & Technology, Год журнала: 2023, Номер 57(16), С. 6682 - 6694

Опубликована: Апрель 13, 2023

High-capacity adsorption and removal of complex volatile organic compounds (VOCs) from real-world environments is a tough challenge for researchers. Herein, swellable array strategy was proposed to realize the synergistic toluene formaldehyde on flexible double hypercross-linked polymers (FD-HCPs). FD-HCPs exhibited multiple sites awarded by hydrophobic benzene ring/pyrrole ring hydrophilic hydroxyl structural unit. The ring, hydroxyl, pyrrole N in effectively captured molecules through π–π conjugation electrostatic interaction weakened their mutual competitive adsorption. Interestingly, strong binding force skeleton deformed pore structure generated new microenvironments other adsorbate. This behavior significantly improved capacity 20% under VOCs. Moreover, group greatly hindered H2O molecule diffusion pore, thus efficiently weakening toward These fascinating properties enabled achieve multicomponent VOC vapor highly humid environment overcame single-species state-of-the-art porous adsorbents. work provides practical feasibility remove VOCs environments.

Язык: Английский

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Modulation of sulfur vacancies at ZnIn2S4-δ/g-C3N4 heterojunction interface for successive C-H secession in photocatalytic gaseous formaldehyde complete oxidation

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 338, С. 123048 - 123048

Опубликована: Июнь 26, 2023

Язык: Английский

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Decahedral BiVO4/tubular g-C3N4 S-scheme heterojunction photocatalyst for formaldehyde removal: Charge transfer pathway and deactivation mechanism

Separation and Purification Technology, Год журнала: 2023, Номер 327, С. 124966 - 124966

Опубликована: Сен. 1, 2023

Язык: Английский

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Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation

Catalysis Reviews, Год журнала: 2021, Номер 65(2), С. 239 - 425

Опубликована: Окт. 31, 2021

Many natural oxidations are relevant to the origin and running of life but usually proceeded under mild conditions using molecular oxygen (O2) in air as sole oxidant enzymes catalysts. In modern society, catalysis plays an essential role many industries, such chemical pharmaceutical industries. However, most heterogeneous catalytic reactions need high operational reaction temperature pressure. Research interest is redirected green recent years, e.g., conditions, employing solvents oxidants O2, particularly air. One question always exists: can these industrial processes be ultimately run similar oxidation efficiency operation conditions? For reactions, greatest challenge lies activating conditions. Therefore, a molecular-level understanding interactions O2 molecules with catalysts or substrates necessary crucial.In this review, we discuss activation different active species (e.g., O22− O22−) their participation low-temperature (≤300 oC) reactions. The challenges, progress, trends some discussed highlighted. early studies on various mainly paid attention interaction between vacancies metal oxides. contrast, try fully understand generation, measurement, roles species. design that facilely activate at low temperatures importance. With catalysts, it possible reduce energy consumption, improve selectivity oxidations, realize processes. Finally, from current body knowledge, propose future directions effectively utilize for solving practical problems help level.

Язык: Английский

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