Atomic-level coordination structures meet graphitic carbon nitride (g-C3N4) for photocatalysis: Energy conversion and environmental remediation

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 123683 - 123683

Опубликована: Янв. 1, 2024

Язык: Английский

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Engineering Built‐In Electric Field Microenvironment of CQDs/g‐C₃N₄ Heterojunction for Efficient Photocatalytic CO₂ Reduction

Advanced Science, Год журнала: 2024, Номер 11(28)

Опубликована: Май 10, 2024

Abstract Graphitic carbon nitride (CN), as a nonmetallic photocatalyst, has gained considerable attention for its cost‐effectiveness and environmentally friendly nature in catalyzing solar‐driven CO 2 conversion into valuable products. However, the photocatalytic efficiency of reduction with CN remains low, accompanied by challenges achieving desirable product selectivity. To address these limitations, two‐step hydrothermal‐calcination tandem synthesis strategy is presented, introducing quantum dots (CQDs) forming ultra‐thin CQD/CN nanosheets. The integration CQDs induces distinct work function CN, creating robust interface electric field after combination. This facilitates accumulation photoelectrons region, providing an abundant source reduced electrons process. Remarkably, nanosheets exhibit average yield 120 µmol g −1 , showcasing outstanding selectivity 92.8%. discovery not only presents innovative pathway development high‐performance photocatalysts grounded non‐metallic materials employing but also opens new avenues versatile application prospects environmental protection sustainable cleaning energy.

Язык: Английский

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Photocontrolled heterojunctions constructed from holmium single atom modified Mg_1.2Ti_1.8O₅/g-C₃N₄ with enhanced photocatalytic CO₂ conversion

Energy & Environmental Science, Год журнала: 2024, Номер 17(14), С. 5039 - 5047

Опубликована: Янв. 1, 2024

This work is the first to introduce photocontrolled catalysts into CO 2 RR, and further RE single atom catalysts, aiming optimize photocatalytic performance by utilizing synergistic effect of composites.

Язык: Английский

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Unveiling the synergistic role of nitrogen vacancies and Z-scheme heterojunction in g-C3N4/β-Bi2O3 hybrids for enhanced CO2 photoreduction

Nano Energy, Год журнала: 2024, Номер 124, С. 109494 - 109494

Опубликована: Март 13, 2024

Язык: Английский

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Recent Advances and Challenges in Efficient Selective Photocatalytic CO₂ Methanation

Small, Год журнала: 2024, Номер 20(32)

Опубликована: Март 15, 2024

Abstract Solar‐driven carbon dioxide (CO 2 ) methanation holds significant research value in the context of emission reduction and energy crisis. However, this eight‐electron catalytic reaction presents substantial challenges activity selectivity. In regard, researchers have conducted extensive exploration achieved developments. This review provides an overview recent advances efficient selective photocatalytic CO methanation. It begins by discussing fundamental principles detail, analyzing strategies for improving efficiency conversion to CH 4 comprehensively. Subsequently, it outlines applications advanced characterization methods Finally, highlights prospects opportunities area, aiming inspire into high‐value shed light on mechanisms.

Язык: Английский

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Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction

Small, Год журнала: 2024, Номер unknown

Опубликована: Апрель 30, 2024

Abstract Photocatalytic CO 2 reduction technology, capable of converting low‐density solar energy into high‐density chemical energy, stands as a promising approach to alleviate the crisis and achieve carbon neutrality. Semiconductor metal oxides, characterized by their abundant reserves, good stability, easily tunable structures, have found extensive applications in field photocatalysis. However, wide bandgap inherent oxides contributes poor efficiency photocatalytic reduction. Defect engineering presents an effective strategy address these challenges. This paper reviews research progress defect enhance performance summarizing classifications, preparation methods, characterization techniques. The focus is on engineering, represented vacancies doping, for improving oxide photocatalysts. includes advancements expanding photoresponse range, enhancing photogenerated charge separation, promoting molecule activation. Finally, provides summary current issues challenges faced along with prospective outlook future development technology.

Язык: Английский

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A review on Photocatalytic CO2 reduction of g-C3N4 and g-C3N4-Based Photocatalysts modified by CQDs

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 115348 - 115348

Опубликована: Янв. 1, 2025

Язык: Английский

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Solar‐Driven Conversion of CO₂ to C₂ Products by the 3d Transition Metal Intercalates of Layered Lead Iodides

Advanced Materials, Год журнала: 2024, Номер 36(30)

Опубликована: Май 2, 2024

Abstract Photocatalytic CO 2 reduction to high‐value‐added C 2+ products presents significant challenges, which is attributed the slow kinetics of multi‐e − photoreduction and high thermodynamic barrier for C–C coupling. Incorporating redox‐active Co /Ni cations into lead halide photocatalysts has potentials improve carrier transport introduce charge polarized bimetallic sites, addressing kinetic issues, respectively. In this study, a coordination‐driven synthetic strategy developed 3d transition metals interlamellar region layered organolead iodides with atomic precision. The resultant hybrids exhibit selective H 5 OH using O vapor at evolution rates 24.9–31.4 µmol g −1 h selectivity 89.5–93.6%, while pristine iodide yields only 1 products. Band structure calculations photoluminescence studies indicate that interlayer species greatly contribute frontier orbitals enhance exciton dissociation free carriers, facilitating between adjacent layers. addition, Bader distribution in situ experimental spectroscopic reveal asymmetric Ni–O–Pb catalytic sites intrinsic polarization, promoting coupling leading formation key *OC–CHO intermediate.

Язык: Английский

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Structurally and Surficially Activated TiO2 Nanomaterials for Photochemical Reactions

Nanoscale, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This review highlights recent advancements in TiO 2 photocatalysts, emphasizing key strategies to enhance their performance for environmental remediation and energy conversion technologies.

Язык: Английский

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Large‐Scale Synthesis of High‐Loading Single Metallic Atom Catalysts by a Metal Coordination Route

Advanced Materials, Год журнала: 2024, Номер 36(32)

Опубликована: Июнь 11, 2024

Abstract Single atom catalyst (SAC) is one of the most efficient and versatile catalysts with well‐defined active sites. However, its facile large‐scale preparation, prerequisite industrial applications, has been very challenging. This dilemma originates from Gibbs–Thomson effect, which renders it rather difficult to achieve high single loading (< 3 mol%). Further, synthesizing procedures are quite complex, resulting in significant mass loss thus low yields. Herein, a novel metal coordination route developed address these issues simultaneously, realized owing rapid complexation between ligands (e.g., biuret) ions aqueous solutions subsequent situ polymerization formed complexes yield SACs. The whole preparation process involves only heating step operated air without any special protecting atmospheres, showing general applicability for diverse transition metals. Take Cu SAC an example, record up 3.565 kg pot ultrahigh 16.03 mol% on carbon nitride (Cu/CN) approached. as‐prepared SACs demonstrated possess activity, outstanding selectivity, robust cyclicity CO 2 photoreduction HCOOH. research explores toward cost‐effective, massive production potential applications.

Язык: Английский

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