TiO2 nanosheet-anchoring Au nanoplates: high-energy facet and wide spectra surface plasmon-promoting photocatalytic efficiency and selectivity for CO2 reduction

An Au–TiO2 nanocomposite consisting of (001) exposed TiO2 nanosheet-anchored Au nanoplates was successfully fabricated and applied for the photocatalytic reduction of CO2 into hydrocarbon fuels.

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Surface-Alkalinized Ti3C2 MXene as an Efficient Cocatalyst for Enhanced Photocatalytic CO2 Reduction over ZnO

Catalysis Science & Technology ◽

10.1039/d1cy00716e ◽

2021 ◽

Author(s):

Junyue Li ◽

Ziyi Wang ◽

Huayu Chen ◽

Qiqi Zhang ◽

Huilin Hu ◽

...

Keyword(s):

Carbon Dioxide ◽

Co2 Reduction ◽

Charge Carriers ◽

Hydrocarbon Fuels ◽

Photocatalytic Reduction ◽

Research Attention ◽

Carbon Dioxide Co2 ◽

Photoinduced Charge

Photocatalytic reduction of carbon dioxide (CO2) into hydrocarbon fuels has attracted increasing research attention in recent years. However, the fast recombination of photoinduced charge carriers and poor adsorption/activation capability of...

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Lasing at the nanoscale: coherent emission of surface plasmons by an electrically driven nanolaser

Nanophotonics ◽

10.1515/nanoph-2020-0157 ◽

2020 ◽

Vol 9 (12) ◽

pp. 3965-3975 ◽

Cited By ~ 1

Author(s):

Dmitry Yu. Fedyanin ◽

Alexey V. Krasavin ◽

Aleksey V. Arsenin ◽

Anatoly V. Zayats

Keyword(s):

Data Storage ◽

Surface Plasmon ◽

Single Molecule ◽

Optical Communication ◽

Surface Plasmon Polariton ◽

High Energy ◽

Photonic Devices ◽

Sensing Applications ◽

Diverse Application ◽

Plasmon Polariton

AbstractPlasmonics offers a unique opportunity to break the diffraction limit of light and bring photonic devices to the nanoscale. As the most prominent example, an integrated nanolaser is a key to truly nanoscale photonic circuits required for optical communication, sensing applications and high-density data storage. Here, we develop a concept of an electrically driven subwavelength surface-plasmon-polariton nanolaser, which is based on a novel amplification scheme, with all linear dimensions smaller than the operational free-space wavelength λ and a mode volume of under λ3/30. The proposed pumping approach is based on a double-heterostructure tunneling Schottky barrier diode and gives the possibility to reduce the physical size of the device and ensure in-plane emission so that the nanolaser output can be naturally coupled to a plasmonic or nanophotonic waveguide circuitry. With the high energy efficiency (8% at 300 K and 37% at 150 K), the output power of up to 100 μW and the ability to operate at room temperature, the proposed surface plasmon polariton nanolaser opens up new avenues in diverse application areas, ranging from ultrawideband optical communication on a chip to low-power nonlinear photonics, coherent nanospectroscopy, and single-molecule biosensing.

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Surface overgrowth on gold nanoparticles modulating high-energy facets for efficient electrochemical CO2 reduction

Nanoscale ◽

10.1039/d1nr03928h ◽

2021 ◽

Author(s):

Woong Choi ◽

Joon Woo Park ◽

Woonghyeon Park ◽

Yousung Jung ◽

Hyunjoon Song

Keyword(s):

Gold Nanoparticles ◽

Renewable Energy ◽

Renewable Energy Sources ◽

Co2 Reduction ◽

High Energy ◽

Reduction Reaction ◽

Chemical Energy ◽

Energy Sources ◽

Electrochemical Co2 Reduction

Electrochemical CO2 reduction reaction (eCO2RR) has been considered one of the potential technologies to store electricity from renewable energy sources into chemical energy. For this aim, designing catalysts with high...

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Carbon nitride derivatives as photocatalysts for the CO2 reduction reaction: computational study

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05713d ◽

2021 ◽

Vol 23 (5) ◽

pp. 3401-3406

Author(s):

Siru Li ◽

Yu Tian ◽

Likai Yan ◽

Zhongmin Su

Keyword(s):

Carbon Nitride ◽

Computational Study ◽

Co2 Reduction ◽

Environmental Problems ◽

Reduction Reaction ◽

Photocatalytic Reduction ◽

Energy Crisis ◽

Promising Strategy ◽

Co2 Reduction Reaction

Photocatalytic reduction of CO2 to hydrocarbons is considered to be a promising strategy to solve the energy crisis and environmental problems.

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Direct Z-scheme Sn-In2O3/In2S3 heterojunction nanostructures for enhanced photocatalytic CO2 reduction activity

Journal of Materials Chemistry C ◽

10.1039/d1tc00014d ◽

2021 ◽

Author(s):

Yinyi Ma ◽

Zemin Zhang ◽

Xiao Jiang ◽

Rongke Sun ◽

Mingzheng Xie ◽

...

Keyword(s):

Carbon Dioxide ◽

Environmental Pollution ◽

Light Absorption ◽

Co2 Reduction ◽

Photocatalytic Reduction ◽

Practical Significance ◽

Energy Crisis ◽

Low Light ◽

Reduction Activity

Photocatalytic reduction of carbon dioxide into chemical fuels has great practical significance in solving energy crisis and environmental pollution, but remains a big challenge owing to its low light absorption...

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Peanut Shell for Energy: Properties and Its Potential to Respect the Environment

Sustainability ◽

10.3390/su10093254 ◽

2018 ◽

Vol 10 (9) ◽

pp. 3254 ◽

Cited By ~ 16

Author(s):

Miguel-Angel Perea-Moreno ◽

Francisco Manzano-Agugliaro ◽

Quetzalcoatl Hernandez-Escobedo ◽

Alberto-Jesus Perea-Moreno

Keyword(s):

Energy Source ◽

Prediction Models ◽

Energy Content ◽

Co2 Reduction ◽

High Energy ◽

Peanut Shell ◽

Agroindustrial Waste ◽

Solid Biofuel ◽

Peanut Shells ◽

Industrial Heating

The peanut (Arachys hypogaea) is a plant of the Fabaceae family (legumes), as are chickpeas, lentils, beans, and peas. It is originally from South America and is used mainly for culinary purposes, in confectionery products, or as a nut as well as for the production of biscuits, breads, sweets, cereals, and salads. Also, due to its high percentage of fat, peanuts are used for industrialized products such as oils, flours, inks, creams, lipsticks, etc. According to the Food and Agriculture Organization (FAO) statistical yearbook in 2016, the production of peanuts was 43,982,066 t, produced in 27,660,802 hectares. Peanuts are grown mainly in Asia, with a global production rate of 65.3%, followed by Africa with 26.2%, the Americas with 8.4%, and Oceania with 0.1%. The peanut industry is one of the main generators of agroindustrial waste (shells). This residual biomass (25–30% of the total weight) has a high energy content that is worth exploring. The main objectives of this study are, firstly, to evaluate the energy parameters of peanut shells as a possible solid biofuel applied as an energy source in residential and industrial heating installations. Secondly, different models are analysed to estimate the higher heating value (HHV) for biomass proposed by different scientists and to determine which most accurately fits the determination of this value for peanut shells. Thirdly, we evaluate the reduction in global CO2 emissions that would result from the use of peanut shells as biofuel. The obtained HHV of peanut shells (18.547 MJ/kg) is higher than other biomass sources evaluated, such as olive stones (17.884 MJ/kg) or almond shells (18.200 MJ/kg), and similar to other sources of biomass used at present for home and industrial heating applications. Different prediction models of the HHV value proposed by scientists for different types of biomass have been analysed and the one that best fits the calculation for the peanut shell has been determined. The CO2 reduction that would result from the use of peanut shells as an energy source has been evaluated in all production countries, obtaining values above 0.5 ‰ of their total emissions.

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Ultrafast charge transfer dynamics in 2D Covalent Organic Frameworks/Re-complex hybrid photocatalyst for CO2 reduction: hot electrons vs. cold electrons

10.21203/rs.3.rs-448398/v1 ◽

2021 ◽

Author(s):

Qinying Pan ◽

Mohamed Abdellah ◽

Yuehan Cao ◽

Yang Liu ◽

Weihua Lin ◽

...

Keyword(s):

Excited State ◽

Charge Transfer ◽

Excitation Energy ◽

Co2 Reduction ◽

Underlying Mechanism ◽

High Energy ◽

Hot Electrons ◽

Covalent Organic Frameworks ◽

Energy Excitation ◽

Energy Dependent

Abstract Rhenium(I)-carbonyl-diimine complexes are promising photocatalysts for CO2 reduction. Covalent organic frameworks (COFs) can be perfect sensitizers to enhance the reduction activities. Here we investigated the excited state dynamics of COF (TpBpy) with 2,2'-bipyridine incorporating Re(CO)5Cl (Re-TpBpy) to rationalize the underlying mechanism. The time-dependent DFT calculation first clarified excited state structure of the hybrid catalyst. The studies from transient visible and infrared spectroscopies revealed the excitation energy-dependent photo-induced charge transfer pathways in Re-TpBpy. Under low energy excitation, the electrons at the LUMO level are quickly injected from Bpy into ReI center (1–2 ps) followed by backward recombination (13 ps). Under high energy excitation, the hot-electrons are first injected into the higher unoccupied level of ReI center (1–2 ps) and then slowly relax back to the HOMO in COF (24 ps). There also remains long-lived free electrons in the COF moiety. This explained the excitation energy-dependent CO2 reduction performance in our system.

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Valence Regulation of Ultrathin Cerium Vanadate Nanosheets for Enhanced Photocatalytic CO2 Reduction to CO

Catalysts ◽

10.3390/catal11091115 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1115

Author(s):

Lujia Ding ◽

Qiutong Han ◽

Hong Lu ◽

Yong Yang ◽

Gang Lu ◽

...

Keyword(s):

Co2 Reduction ◽

Catalytic Efficiency ◽

State Regulation ◽

Photocatalytic Reaction ◽

Photocatalytic Efficiency ◽

Structure Directing Agent ◽

Valence States ◽

Cerium Vanadate ◽

One Step ◽

The Relationship

Atomic valence state regulation is an advantageous approach for improving photocatalytic efficiency and product selectivity. However, it is difficult to precisely control the ratio of the different valence states on the surface and the relationship between the surface valence change and catalytic efficiency in the photocatalytic reaction process is unclear. Herein, CeVO4 ultrathin nanosheets were fabricated by one-step solvothermal method with ethanolamine (MEA) as the structure-directing agent. The ratio of the concentrations of intrinsic Ce4+ and Ce3+ ions is precisely modulated from 19.82:100 to 13.33:100 changed by the volume of MEA added without morphology modification. The photocatalytic efficiency increases as the concentrations of intrinsic Ce4+ and Ce3+ ions decrease and CV3 (prepared with 3 mL of MEA) shows the highest CO generation rate approximately 6 and 14 times larger than CV (prepared without MEA) and CV1 (prepared with 1 mL of MEA), respectively, in the photocatalytic CO2 reduction. Interestingly, about 6.8% photo-induced Ce4+ ions were generated on the surface of the catalysts during the photocatalytic CO2 reduction without any phase and morphology changes for CV3. The photocatalytic reaction mechanism is proposed considering the intrinsic and photo-induced Ce4+ ions to obtain efficient photocatalysts.

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