发布于 2025-04-21

As a novel two-dimensional (2D) material with superior electrical conductivity, Mo2TiC2 MXene has been synthesized and applied in the fields of supercapacitors, lithium batteries, and electrocatalysis. Moreover, Mo2TiC2 MXene exhibits significant potential in photocatalytic processes due to its excellent light absorption and electron acceptance properties. Consequently, a few-layered Mo2TiC2 MXene with a large lamellar structure was designed and synthesized using etching and intercalation method

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发布于 2025-04-21

The rational design of S-scheme heterojunctions holds significant potential for efficient photocatalytic energy conversion, attributed to their enhanced carrier separation efficiency and high redox capacity. Nevertheless, achieving precise control and transfer dynamics in S-scheme heterojunctions remains a substantial challenge. Herein, a unique architecture is devised featuring porous rod-shaped Fe2O3 particles loaded onto Fe single-sites modified g-C3N4 nanosheets via single-sites mediated het

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发布于 2025-04-02

Artificial photosynthesis of H2O2 from inexhaustible seawater is a desirable energy production strategy, but substantial challenge. Herein, we present the Nb2C quantum dots anchored on pyrene-based covalent organic framework (Nb2C QDs@PY-DHBD-COF, NQPD-x) heterostructures for efficient non-sacrificial H2O2 photosynthesis directly from air and seawater. The optimal NQPD-3 catalyst achieves an impressive H2O2 production rate of 3560 μmol g- 1 h- 1, and apparent quantum yield of 12.8 % at 400 nm to

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发布于 2025-04-02

Traditional photocatalysts often have limited efficiency due to the high recombination rate of photogenerated electron-hole pairs. In this work, we synthesized 3D/2D ZnSe-MXene Schottky heterojunctions by an in situ electrostatic self-assembly method. Notably, the 3% MXene-ZnSe composite exhibited an optimized photocatalytic hydrogen production rate of 765.0 μmol g 1 h 1, about 1.6 times higher than that of pristine ZnSe. MXene’s high conductivity and large surface area enhance catalytic perform

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发布于 2024-11-15

Utilizing of oxygen and water for hydrogen peroxide (H2O2) production presents an attractive approach for solarto-chemical energy conversion. The rapid recombination of charge carriers generated by individual covalent organic frameworks (COFs) remains a major limitation in the field of H2O2 photoproduction. In this work, we developed binary heterojunction photocatalysts by facilely combining bipyridine-based COF (COF-TpBpy) with flower-like In2S3 nanosheets using an in-situ solvothermal method.

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发布于 2024-11-15

Photocatalytic water splitting for hydrogen production is a sustainable and environmentally friendly technology. However, the rapid recombination of photo-induced electrons and holes results in low hydrogen production activity of photocatalysts. Constructing low-cost and high-efficiency heterojunctions is an imperative strategy to address the current challenges in photocatalytic hydrogen production. This study presents a novel binary heterojunction photocatalyst constructed of ZnIn2S4 nanoflower

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发布于 2024-09-12

The design and modification of heterojunction photocatalysts to enhance efficient interfacial charge transfer and superior photocatalytic performance are fundamental objectives in the field of solar-light-driven energy conversion and production. This study presents a novel S-scheme heterojunction which features lattice-matched morphological hetero-nanostructures, composing of two-dimensional (2D) graphitic carbon nitride (CN) loaded with uniformly distributed and size-consistent 2D nano-rhombohe

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发布于 2024-09-09

The energy crisis has already seriously affected the daily lives of people around the world. As a result, designing efficient catalysts for photocatalytic hydrogen evolution is a promising strategy to energy supply. Co-catalyst modification can significantly enhance the photocatalytic activity of single semiconductors, overcoming limitations posed by their narrow visible light absorption range and high electron-hole recombination rate. MXene-based composites demonstrate immense potential as co-c

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发布于 2024-08-23

Cooperative coupling of alkene epoxidation with in situ H2O2 photosynthesis is a prospective but challenging strategy for maximizing energy utilization and fabricating value-added chemicals. Herein, a covalent assembly of bipyridine-linked covalent organic framework onto VNbC solid-solution MXene heterostructures (COF-TpBpy@VNbC, TBNV-x) has been constructed, exhibiting high catalytic activity for selective styrene epoxidation (as a model reaction) with in situ photogenerated H2O2. Significantly

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发布于 2024-07-05

Hydrogen peroxide (H2O2) is one of the most environmentally friendly and versatile chemical oxidizing agents, with only O2 and H2O as reaction products. It is widely used in environmental protection, industrial production, and medical fields. At present, most of the industrial production of H2O2 adopts anthraquinone oxidation, but there are shortcomings such as pollution of the environment and large energy consumption. Covalent organic frameworks (COFs) are a class of porous crystalline material

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