Internal electric field in carbon nitride-based heterojunctions for photocatalysis

Nano Energy, Journal Year: 2023, Volume and Issue: 108, P. 108228 - 108228

Published: Jan. 23, 2023

Carbon nitride is one of the most promising metal-free photocatalysts to harvest solar light for energy conversion and pollutant treatment. Unfortunately, its photocatalytic performance impeded by sluggish charge carriers due high symmetry unit cells chemical structure. Fabrication an internal electric field (IEF) in carbon nitride-based evidenced be a productive strategy actuate fast separation photo-excited navigate their migrations active sites apparent quantum efficiency (AQE) throughputs. In current work, comprehensive review IEF different types heterojunctions will well presented. Emphasis put on latest progress generation hosting 2-dimensional (2D) nanosheets with dimensional materials, modulation interfacial engineering as identification monitoring. Relationships between performances various processes also enlightened. Finally, this suggest challenges future perspectives IEF-driven photocatalysis. This brings intrinsic impetus photocatalyst forefront anticipated provide guidance configure powered 2D heterostructures toward efficient environmental purification.

Language: Английский

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Reinforcing the Efficiency of Photothermal Catalytic CO₂ Methanation through Integration of Ru Nanoparticles with Photothermal MnCo₂O₄ Nanosheets

ACS Nano, Journal Year: 2023, Volume and Issue: 17(23), P. 23761 - 23771

Published: Nov. 20, 2023

Carbon dioxide (CO2) hydrogenation to methane (CH4) is regarded as a promising approach for CO2 utilization, whereas achieving desirable conversion efficiency under mild conditions remains significant challenge. Herein, we have identified ultrasmall Ru nanoparticles (∼2.5 nm) anchored on MnCo2O4 nanosheets prospective photothermal catalysts methanation at ambient pressure with light irradiation. Our findings revealed that exhibit dual functionality substrates localized temperature enhancement and photocatalysts electron donation. As such, the optimized Ru/MnCo2O4-2 gave high CH4 production rate of 66.3 mmol gcat-1 h-1 (corresponding 5.1 mol gRu-1 h-1) 96% selectivity 230 °C irradiation (420-780 nm, 1.25 W cm-2), outperforming most reported plasmonic metal-based catalysts. The mechanisms behind intriguing catalytic performance improvement were substantiated through comprehensive investigation involving experimental characterizations, numerical simulations density functional theory (DFT) calculations, which unveiled synergistic effects enhanced charge separation efficiency, improved reaction kinetics, facilitated reactant adsorption/activation accelerated intermediate over Ru/MnCo2O4. A comparison study showed that, identical external input energy during reaction, had much higher compared Ru/TiO2 Ru/Al2O3. This underscores pivotal role played by supports believed engender heightened interest in metal conditions.

Language: Английский

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Tracking Heterogeneous Interface Charge Reverse Separation in SrTiO₃/NiO/NiS Nanofibers with In Situ Irradiation XPS

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(44)

Published: Sept. 1, 2023

Abstract Photocatalytic conversion of H 2 O and CO into solar fuels is considered to be a green renewable technology while photocatalytic performance hampered by the severe recombination photogenerated electron–hole pairs. Drawing inspiration from concepts electrons transfer layer (ETL) holes (HTL) in perovskite cells, multicomponent photocatalyst SrTiO 3 /NiO/NiS that incorporates p–n heterojunction Schottky junction constructed for converting energy easily storable fuels. The NiS NiO play roles analogy ETL HTL which accomplishes reverse migration holes, accordingly, exhibits noticeable enhancement performance. However, lack direct observation charge pathways complex photocatalysts makes it challenging thoroughly investigate their catalytic mechanisms. Herein, situ irradiation X‐ray photoelectron spectroscopy (ISI–XPS) employed track charges between microscopic heterogeneous interfaces, thereby providing comprehensive elucidation mechanism formation process integrating photoelectrochemical tests. This study not only serves as compelling evidence capability ISI–XPS directly accurately tracking but also an intriguing highlight within catalyst design strategy.

Language: Английский

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The water splitting cycle for hydrogen production at photo-induced oxygen vacancies using solar energy: experiments and DFT calculation on pure and metal-doped CeO₂

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(13), P. 7128 - 7141

Published: Jan. 1, 2023

Water splitting driven by photo-induced oxygen vacancies for H 2 production was proved to be facile on metal doped CeO .

Language: Английский

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Photon and phonon powered photothermal catalysis

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(13), P. 4461 - 4480

Published: Jan. 1, 2024

Synergistic coupling of photons and phonons make the photothermal catalytic conversion various important processes possible.

Language: Английский

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Promoting surface lattice oxygen and oxygen vacancy of CeO2 for photothermal methane dry reforming over Ni/CeO2 catalysts

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154861 - 154861

Published: Aug. 15, 2024

Language: Английский

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Optimization of Schottky barrier height and LSPR effect by dual defect induced work function changes for efficient solar-driven hydrogen production

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 490, P. 151822 - 151822

Published: May 1, 2024

Language: Английский

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Coupled internal electric field with hydrogen release kinetics for promoted photocatalytic hydrogen production through employing carbon coated transition metal as co-catalyst

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 630, P. 274 - 285

Published: Oct. 11, 2022

Language: Английский

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The double-edged effect of single atom metals on photocatalysis

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 453, P. 139833 - 139833

Published: Oct. 19, 2022

Language: Английский

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Plasmon photothermal-promoted solar photocatalytic hydrogen production over a CoCr₂O₄/g-C₃N₄heterojunction

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(42), P. 22819 - 22833

Published: Jan. 1, 2022

The photothermal effect of CoCr 2 O 4 is reported for the first time and applied in solar photocatalytic hydrogen production by construction /g-C 3 N heterojunction.

Language: Английский

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