Accelerated Dual Activation of Lattice Oxygen and Molecule Oxygen over CoMn₂O₄ Catalysts for VOC Oxidation: Promoting the Role of Oxygen Vacancies

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(6), P. 4340 - 4351

Published: March 7, 2024

The in-depth activation mechanism of oxygen species (including lattice and gaseous oxygen) for catalytic oxidation reactions has not been elucidated still remains a question on the experimental level. In this work, dual molecule highly efficient volatile organic compound was observed spinel catalysts through construction vacancy engineering (urea modification). active surface were generated via weakening metal–oxygen bond strength, which could be easily activated to participate in toluene form CO2. Simultaneously, ability molecular also enhanced promote replenishment species. Moreover, formation consumption rates intermediates significantly accelerated due Hence, U400 catalyst (T90 = 217 °C) exhibited performance compared with pristine 250 °C). This work provided credible comprehension process heterogeneous reaction, developing pathway boost activity.

Language: Английский

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Efficient Catalytic Elimination of Toxic Volatile Organic Compounds via Advanced Oxidation Process Wet Scrubbing with Bifunctional Cobalt Sulfide/Activated Carbon Catalysts

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(20), P. 8846 - 8856

Published: May 10, 2024

Advanced oxidation process (AOP) wet scrubber is a powerful and clean technology for organic pollutant treatment but still presents great challenges in removing the highly toxic hydrophobic volatile compounds (VOCs). Herein, we elaborately designed bifunctional cobalt sulfide (CoS2)/activated carbon (AC) catalyst to activate peroxymonosulfate (PMS) efficient VOC removal an AOP scrubber. By combining excellent adsorption capacity of AC with PMS activation activity CoS2, CoS2/AC can rapidly capture VOCs from gas phase proceed SO4•– HO• radical-induced reaction. More than 90% aromatic were removed over wide pH range (3–11) low Co ion leaching (0.19 mg/L). The electron-rich sulfur vacancies low-valence species main active sites activation. was mainly responsible initial VOCs, while O2 acted subsequent ring-opening mineralization processes intermediates. No gaseous intermediates detected, liquid like benzene also greatly decreased, thus effectively reducing health toxicity associated byproduct emissions. This work provided comprehensive understanding deep via scrubber, significantly accelerating its application environmental remediation.

Language: Английский

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Recent progress on VOC pollution control via the catalytic method

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 61, P. 71 - 96

Published: June 1, 2024

Language: Английский

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TiO2-based photocatalysts for emerging gaseous pollutants removal: From photocatalysts to reactors design

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 515, P. 215960 - 215960

Published: May 23, 2024

Language: Английский

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In Situ Construction of Manganese Oxide Photothermocatalysts for the Deep Removal of Toluene by Highly Utilizing Sunlight Energy

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(10), P. 4286 - 4297

Published: March 1, 2023

The alternative use of electric energy by renewable to supply power for catalytic oxidation pollutants is a sustainable technology, requiring competent catalyst realize efficient utilization light and drive the reaction. Herein, in situ-synthesized manganese oxide heterostructure composites are developed through solvothermal reduction subsequent calcination amorphous (AMO). 95% toluene conversion 80% CO2 mineralization were achieved over calcined at 250 °C (AMO-250) under irradiation, stability was maintained least 40 h. Highly energy, uniformly dispersed nanoparticles, large specific surface area, improved metal reducibility, oxygen desorption migration ability low temperature contribute good activity AMO-250. Light activated more lattice participate reaction via Mars-van Krevelen (MvK) mechanism, traditional e--h+ photocatalytic behavior exists AMO-250 composite as an auxiliary degradation path. pathways photothermocatalysis thermocatalysis close, except emergence different copolymers, where enhances deep intermediates. A proof-of-concept study natural sunlight has confirmed feasibility practical application photothermocatalytic pollutants.

Language: Английский

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Review and Perspectives of Enhancement in the Catalytic Stability for the Complete Combustion of CO, CH₄, and Volatile Organic Compounds

Energy & Fuels, Journal Year: 2023, Volume and Issue: 37(5), P. 3590 - 3604

Published: Feb. 15, 2023

As typical air pollutants, CO, CH4, and volatile organic compounds (VOCs) have received great attention due to their negative impact on the environment human health. Heterogeneous catalysts are widely used in catalytic removal of exhaust emission from industrial automobile sources but still suffer deactivation because various factors. The development a catalyst with excellent stability is highly desired. We herein summarized recent progress for enhancing tried obtain an in-depth understanding long-term durability, resistance sinter, tolerance multi-impurities. Finally, current challenges future perspectives developing stable efficient fields synergistic pollutants or resource utilization VOCs via selective oxidation proposed.

Language: Английский

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Recent Progress in Metal Oxide-Based Photocatalysts for CO2 Reduction to Solar Fuels: A Review

Molecules, Journal Year: 2023, Volume and Issue: 28(4), P. 1653 - 1653

Published: Feb. 9, 2023

One of the challenges in developing practical CO2 photoconversion catalysts is design materials with a low cost, high activity and good stability. In this paper, excellent photocatalysts based on TiO2, WO3, ZnO, Cu2O CeO2 metal oxide materials, which are cost-effective, long-lasting, easy to fabricate, evaluated. The characteristics nanohybrid depend greatly their architecture design. Thus, we focus outstanding that offer effective solutions. Strategies improve conversion efficiency summarized, including heterojunction, ion doping, defects, sensitization morphology control, can inspire future improvement photochemistry. capacity adsorption also pivotal, varies morphological electronic structures. Forms 0D, 1D, 2D 3DOM (zero/one/two-dimensional- three-dimensional-ordered macroporous, respectively) involved. Particularly, several advantages material make it an candidate for conversion. Hence, explain its preparation method. Based discussion, new insights prospects designing high-efficient metallic reduce emissions presented.

Language: Английский

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Advances in photothermal catalysis for air pollutants

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150192 - 150192

Published: March 6, 2024

Language: Английский

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Construction of Pd/Mn3O4 heterojunction catalyst for efficient photothermal synergetic catalytic propane total oxidation

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 336, P. 126255 - 126255

Published: Jan. 6, 2024

Language: Английский

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Boosting Photothermocatalytic Oxidation of Toluene Over Pt/N-TiO₂: The Gear Effect of Light and Heat

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(17), P. 7662 - 7671

Published: April 5, 2024

Photothermal catalysis is extremely promising for the removal of various indoor pollutants owing to its photothermal synergistic effect, while low light utilization efficiency and unclear catalytic mechanism hinder practical applications. Here, nitrogen atoms are introduced, Pt nanoparticles loaded on TiO2 construct Pt/N-TiO2-H2, which exhibits 3.5-fold higher toluene conversion rate than pure TiO2. Compared both photocatalytic thermocatalytic processes, Pt/N-TiO2-H2 exhibited remarkable performance stability in photothermocatalytic oxidation toluene, achieving 98.4% 98.3% CO2 yield under a intensity 260 mW cm–2. Furthermore, demonstrated potential applicability elimination volatile organic compounds. The effect occurs as thermocatalysis accelerates accumulation carboxylate species degradation aldehyde species, photocatalysis promotes generation consumption species. This ultimately enhances process. involves specific intermediates through interplay heat, providing novel insights design materials understanding mechanisms.

Language: Английский

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