Photocatalysis of CO₂ Reduction by a Ru(II)–Ru(II) Supramolecular Catalyst Adsorbed on Al₂O₃

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(7), P. 4376 - 4383

Published: March 16, 2023

Various hybrid systems consisting of metal-complex photocatalysts and semiconductor materials have been developed for photocatalytic CO2 reduction via the Z-scheme mechanism. Such are often composed a supramolecular photocatalyst with Ru(II) photosensitizer catalyst (RuRu). In this study, RuRu was adsorbed on Al2O3 particles, activity RuRu/Al2O3 in investigated detail, especially by changing adsorption density RuRu. The production HCOOH, which is main product reduction, decreased upon increasing owing to formation Ru polymers through reductive coupling units moieties at high densities. This behavior contrasts previously reported RuRe/Al2O3 same Re(I) unit. Moreover, co-adsorption mononuclear Ru(II)-complex photosensitizers (Ru) close substantially improved (turnover number HCOOH increased more than 10 times) because photochemically supplies electrons intermediate formed from reduced species suppress decomposition

Language: Английский

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Unlocking full and fast conversion in photocatalytic carbon dioxide reduction for applications in radio-carbonylation

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 24, 2023

Harvesting sunlight to drive carbon dioxide (CO2) valorisation represents an ideal concept support a sustainable and carbon-neutral economy. While the photochemical reduction of CO2 monoxide (CO) has emerged as hot research topic, full CO2-to-CO conversion remains often-overlooked criterion that prevents productive direct CO into high-value-added chemicals. Herein, we report photocatalytic process unlocks fast (<10 min) its straightforward human health related field radiochemistry with isotopes. Guided by reaction-model-based kinetic simulations rationalize reaction optimisations, this manifold opens new opportunities for access 11C- 14C-labeled pharmaceuticals from their primary isotopic sources [11C]CO2 [14C]CO2.

Language: Английский

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Rhenium(I) Complex-Containing Amphiphilic Metallopolymer Stabilizing CdS Quantum Dots for Synergistically Boosting Photoreduction of CO₂

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(18), P. 12391 - 12402

Published: Sept. 6, 2023

Artificial photosynthesis is a viable approach for transforming carbon dioxide (CO2) into value-added chemicals driven by renewable solar energy. Studies on photocatalytic CO2 reduction (CO2R) have thus been expedited in recent years. Cadmium sulfide quantum dots (CdS QDs) regarded as one of the most promising photocatalysts, offering myriad advantages CO2R, such narrow band gap, confinement effect, and tunable redox potential. However, CdS QDs usually suffer from photo, thermal, oxidative instability. In this work, we demonstrate an effective method to endow assembling them with amphiphilic metallopolymers enhance their stability synergistically increase catalytic activity. The were synthesized via precise radical polymerization between 1-ethyl-3-vinylimidazolium bromide rhenium(I)-N-(3-((4′-methoxy-[2,2′-bipyridin]-4-yl)oxy)propyl)acrylamide compounds. resultant positively charged rhenium complex-containing metallopolymer (P(Re-IL)) underwent spontaneous assembly negatively thioglycolate-capped electrostatic interaction, forming highly active stable CdS/P(Re-IL) hybrids. ultimate interfacial interaction two components facilitated photoinduced electron transfer (PET) vicinal bipyridyl ReI(CO)3Cl derivatives, promoting CO high production rate selectivity 25 mL-DMF/water (4:1 v/v) solution under LED 370 nm irradiation. For example, CdS/P(5% Re-IL) was optimum catalyst our system, showing highest 38.3 mmol g–1 h–1 93.8% within 2 h no induction period, which ranked among top state-of-the-art CO2R photocatalysts mixed organic-water media.

Language: Английский

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In situ construction of cyano-modified g-C3N4 nanolayer-coated SrTiO3 nanotubes by gas-solid reaction for efficient photocatalytic solar fuel production

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143817 - 143817

Published: June 1, 2023

Language: Английский

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Comprehensive analysis of photocatalytic and photoreactor challenges in photocatalytic wastewater treatment: A case study with ZnO photocatalyst

Materials Science in Semiconductor Processing, Journal Year: 2024, Volume and Issue: 181, P. 108592 - 108592

Published: June 12, 2024

Language: Английский

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