Research on cobalt-doping sites in g-C3N4 framework and photocatalytic reduction CO2 mechanism insights

Review Chemistry, Physical

Environmental remediation and sustainable energy generation via photocatalytic technology using rare earth metals modified g-C3N4: A review

Mohammed Ismael

Summary: Rare earth element-modified g-C3N4 photocatalysts have shown promising applications and significant improvement in photocatalytic activity.

JOURNAL OF ALLOYS AND COMPOUNDS (2023)

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Article Chemistry, Physical

Heteroatom bay-annulated perylene imides/g-C3N4 heterojunctions for efficient photocatalytic H2O2 evolution

Shufan Feng et al.

Summary: Developing PDI-based photocatalysts with different substitutes, the Se-HPDI/g-C3N4 heterojunction showed the highest H2O2 production rate of 224.27 μM h-1 under visible light, which is 10.1 times higher than bare g-C3N4. The enhancement is attributed to the disparity of electron distribution between different constituent layers in heterojunctions, facilitated by the introduction of substitutes at the bay position. Additionally, the load of PDIs broadens the optical absorption range of g-C3N4 and suppresses H2O2 decomposition. This work provides inspiration for the further design of PDI-based photocatalysts.

JOURNAL OF ALLOYS AND COMPOUNDS (2023)

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Article Materials Science, Multidisciplinary

Controllable construction 2D-CN photocatalyst for degradation MBT and mechanism insights

Xiuna Yu et al.

Summary: A nonmetal two-dimensional carbon nitride (2D-CN) with different thickness was synthesized by a facile hydrothermal and calcination method. The 2D-CN-7.0 exhibited significantly enhanced photocatalytic activity (82%) for degrading 2-mercaptobenzothiazole (MBT), attributed to the ultrathin 2D structure that improved the transfer efficiency of charge carriers and reduced the diffusion path to MBT, resulting in accelerated reaction rates. Density functional theory (DFT) computation and experimental results showed no correlation between band gap and CN thickness. The research also discussed the possible mechanisms for the enhanced photocatalytic performance, degradation pathway of MBT, and photogenerated carrier transfer behaviors in detail. This study provides a novel strategy to control the thickness of CN for improved photocatalytic activity.

MATERIALS RESEARCH BULLETIN (2023)

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Article Chemistry, Inorganic & Nuclear

Pd Nanosheet-Decorated 2D/2D g-C3N4/WO3•H2O S-Scheme Photocatalyst for High Selective Photoreduction of CO2 to CO

Qi Liu et al.

Summary: The global economy, environmental problems, and greenhouse effect have been a concern for countries worldwide. This study focuses on the development of hybrid photocatalytic nanostructures to reduce CO2 emissions and improve the efficiency of electron transfer. The introduction of ultrathin Pd nanosheets enhances the reaction and widens the absorption area of the composite material.

INORGANIC CHEMISTRY (2022)

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Article Chemistry, Physical

Charge transfer in photocatalysis of direct Z-scheme g-C3N4-based ferroelectric heterojunction

Ying Yang et al.

Summary: In this study, g-C3N4-based ferroelectric catalysts with various BiFeO3 contents were prepared with a simple approach, and the direct Z-scheme heterojunction between BFO and g-C3N4 was experimentally proved. The research confirmed that the direct Z-scheme g-C3N4-based ferroelectric heterostructure plays a positive role in photocatalytic activity, and discussed the charge transfer mechanism in detail, providing a new strategy for improving the performance of g-C3N4-based ferroelectric catalysts.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

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Article Chemistry, Multidisciplinary

Site-Specific Electron-Driving Observations of CO2-to-CH4 Photoreduction on Co-Doped CeO2/Crystalline Carbon Nitride S-Scheme Heterojunctions

Lei Cheng et al.

Summary: This study reports a method of controlling directional charge transfer by embedding single-atomic Co into CeO2 catalyst to achieve selective CO2 photoreduction to CH4. The results show that Co embedded into CeO2 catalyst can accelerate the transfer of electrons from carbon nitride to specific Co sites, thereby promoting CH4 formation. This method achieves high yield and high turnover number of CH4 production without the need for any sacrificial agent.

ADVANCED MATERIALS (2022)

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Article Chemistry, Physical

Nanoarchitectonics of uniformly distributed noble-metal-free CoP in g-C3N4 via in-situ fabrication for enhanced photocatalytic and electrocatalytic hydrogen production

Xingyan Liu et al.

Summary: This study reports the development of a non-noble metal bifunctional catalyst for both photocatalytic and electrocatalytic hydrogen production. The optimal composite material exhibits excellent performance in both photo and electrocatalysis, and its superior structural features and electron transfer ability are confirmed by various experimental techniques.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

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Article Chemistry, Multidisciplinary

P and Cu Dual Sites on Graphitic Carbon Nitride for Photocatalytic CO2 Reduction to Hydrocarbon Fuels with High C2H6 Evolution

Gang Wang et al.

Summary: In this study, a photocatalyst composed of P and Cu dual sites was developed for highly efficient reduction of CO2 to high-value carbon products. The formation of charge-enriched Cu sites and the role of isolated P atoms during photocatalysis were identified through spectroscopic characterizations and theoretical simulations. This work offers new insights into the design of photocatalysts for efficient CO2 conversion.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Engineering, Chemical

Boosting photocatalytic H2 evolution by ingenious construction of isotype heptazine/triazine based porous carbon nitride heterojunction

Xueru Chen et al.

Summary: The study prepared a high surface area isotype heptazine/triazine based carbon nitride heterojunction (HTCN-1M) using a molten salt method, which utilized H2SO4-treated melamine as precursor. The synergistic effect of the structure's built-in electric field and the abundant specific surface area led to excellent photocatalytic performance with H(2) evolution up to 5764 mu mol h(-1) g(-1), significantly higher than pure g-C3N4.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

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Article Chemistry, Physical

Quantum effect and Mo-N surface bonding states of α-MoC1-x modified carbon nitride for boosting photocatalytic performance

Zhi Zhu et al.

Summary: In this study, a novel photocatalyst was developed and demonstrated to enhance the degradation of tetracycline under visible light. The mechanism behind the improved photocatalytic activity was investigated and explained using experimental and computational methods.

CATALYSIS SCIENCE & TECHNOLOGY (2022)

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Article Chemistry, Physical

Insights into enhancing photocatalytic reduction of CO2: Substitutional defect strategy of modified g-C3N4 by experimental and theoretical calculation approaches

Nur Umisyuhada Mohd Nor et al.

Summary: The study looks into the effects of C/doping on the optical and electronic structure of g-C3N4, revealing that substitution of C atom with N site can enhance photocatalytic activity and increase methanol yield. The introduction of carbon dopant leads to a tunable energy band gap that enhances light harvesting and performance in photocatalytic carbon dioxide reduction to methanol.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Physical

In situ synthesis of 2D ultrathin cobalt doped g-C3N4 nanosheets enhances photocatalytic performance by accelerating charge transfer

Xi Yang et al.

Summary: A series of cobalt-doped g-C3N4 nanosheet photocatalysts with different cobalt doping content were prepared, among which the 1 wt% sample showed excellent photocatalytic activity and stability, with higher H2 evolution and MB degradation performance compared to bulk g-C3N4.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Physical

Insight into the Effect of the Cl 3p Orbital on g-C3N4 Mimicking Photosynthesis under CO2 Reduction

Yi Wang et al.

Summary: This research successfully synthesized chlorine-doped g-C3N4 photocatalysts (Cl-CN) through a simple multiple calcination method, which exhibited satisfactory photocatalytic activity in the photoreduction of CO2 and provided a deeper understanding of the effect of chlorine doping on the electronic structure and CO2 reduction activity.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

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Article Chemistry, Multidisciplinary

Ordered Macroporous Carbonous Frameworks Implanted with CdS Quantum Dots for Efficient Photocatalytic CO2 Reduction

Fengliang Wang et al.

Summary: Solar-driven photocatalytic CO2 reduction is a promising approach for addressing the energy crisis and CO2 pollution. A newly developed photocatalyst shows high efficiency in CO2 reduction and introduces an amines oxidation reaction to further enhance the process.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

AgCl/Au/g-C3N4 ternary composites: Efficient photocatalysts for degradation of anionic dyes

Wenjun Zhang et al.

Summary: In this study, ternary composites containing AgCl and Au nanoparticles on g-C3N4 were prepared, showing excellent photocatalytic performance in degrading cationic dyes.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Physical

Accurate engineering of hexagonal hollow carbon nitride with carbon vacancies: enhanced photocatalytic H2 evolution and its mechanism

Xueru Chen et al.

Summary: The vacancy engineering and morphology construction of hexagonal hollow carbon nitride (HHCN) were achieved simultaneously through self-assembly using melamine (MA) and cyanuric acid (CA) in the presence of P123 and H2SO4. This synergistic effect of P123 as a structure directing agent and H2SO4 as a hole-maker and stability-maintainer led to the formation of HHCN with carbon vacancies. The introduction of carbon vacancies improved the photocatalytic hydrogen evolution rate of HHCN significantly, demonstrating its superior performance compared to g-C3N4.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Sulfur-doped g-C3N4 for efficient photocatalytic CO2 reduction: insights by experiment and first-principles calculations

Zhi Zhu et al.

Summary: The study designed and synthesized a new two-dimensional S-doped g-C3N4 photocatalyst, which showed high CO evolution rate and stability in water. The results revealed the formation of S-C bond, the impact of S atoms on band gap and charge separation, and the mechanism of enhanced CO2 reduction activity of S-CN compared to bulk-CN.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

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Article Nanoscience & Nanotechnology

Biomass-Assisted Synthesis of CeO2 Nanorods for CO2 Photoreduction under Visible Light

Zhi Liu et al.

Summary: This study successfully synthesized a highly efficient photocatalyst for converting CO2 into high-valued fuels by utilizing commercial chemicals and plant leaves. The amount of plant leaves introduced during the synthesis process had a significant impact on the growth morphology of the resulting CeO2 nanocrystals.

ACS APPLIED NANO MATERIALS (2021)

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Article Materials Science, Ceramics