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

Xu, Tao; Shen, Wenbiao; Li, Dongyi; Li, Binrong; Wang, Yemei; Song, Xianghai; Zhu, Zhi; Huo, Pengwei

doi:10.1016/j.jallcom.2023.170044

Cited by 58 publications

(12 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These peaks correspond to the periodic conjugation of C−N heterocyclic symmetry units and aromatic interlayer stacking, respectively. 25 After the incorporation of ACT, the primary peak of g-CN was retained, indicating that the triazine framework in the g-CN-ACTx was not significantly affected by the presence of external species. Noteworthy, when the incorporation amount of ACT increased, the intensity of both (100) and (002) peaks dropped, suggesting that ACT partially destroyed the ordered structure of g-CN.…”

Section: Resultsmentioning

confidence: 94%

“…The diffraction pattern of g-CN exhibits two peaks at approximately 12.9° (100) and 27.4° (002). These peaks correspond to the periodic conjugation of C–N heterocyclic symmetry units and aromatic interlayer stacking, respectively . After the incorporation of ACT, the primary peak of g-CN was retained, indicating that the triazine framework in the g-CN-ACT x was not significantly affected by the presence of external species.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Wang

et al. 2023

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

Charge-transfer dynamics and light utilization efficiency are two critical factors that significantly impact the catalytic performance of a photocatalyst. Therefore, developing a reasonable method to enhance these aspects is a valuable strategy for creating efficient photocatalysts. In this study, we fabricated a donor–acceptor (D–A) structure by modifying graphitic phase carbon nitride (g-CN) nanosheets with 2-aminothiophene-3-carbonitrile (ACT). The introduction of ACT altered the dipole moment of g-CN and significantly extended the conjugated system of g-CN, thereby enhancing the n → π* electronic transition. These improvements in molecular dipole and conjugated system effectively enhanced the charge-transfer dynamics and light utilization efficiency. In addition, the introduction of ACT greatly improved the CO2 adsorption capacity of g-CN nanosheets. Experimental results showed that g-CN-ACT0.05 exhibited the best photocatalytic CO2 reduction performance, with a CO evolution rate of 8.27 μmol g–1 h–1, which was eight times higher than that of unmodified g-CN. This research serves as a reference for developing catalysts with high photocatalytic activity for CO2 reduction.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Wang

et al. 2023

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Finally, the obtained CH 4 * became CH 4 through the desorption process (eq ). − Moreover, the possible mechanism for photoreduction of CO 2 and charge transfer behavior is shown in Scheme . normalO − CN + h υ → normalO − CN ( normale − + normalh + ) normalC O 2 + H 2 normalO → H + + normalH normalC O 3 ‐ normalH normalC O 3 ‐ → H + + normalC normalO 3 2 − normalC O 2 ( g ) → normalC O 2 * normalC normalO 2 * + normalH + + normale − → normalC normalO normalO normalH * normalC normalO normalO normalH …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Oxygen-Doped Red Carbon Nitride: Enhanced Charge Separation and Light Absorption for Robust CO₂ Photoreduction

Zhu,

Shen,

et al. 2023

Inorg. Chem.

Self Cite

View full text Add to dashboard Cite

Utilizing artificial photosynthesis for the conversion of CO2 into value-added fuels has been recognized as a promising strategy for the ever-increasing energy crisis and the greenhouse effect. Herein, the element doping engineering of red spherical g-C3N4 having oxygen bonded with compositional carbon (C–O–C) for CO2 photoreduction has been explored to address this challenge. The C–O bond was formed by hydrothermal treatment with dicyandiamide and 1,3,5-trichlorotriazine. The experimental and DFT results displayed the optimum oxygen substitution sites and demonstrated that the oxygen doping greatly improved the light utilization efficiency, CO2 affinity, and charge carrier transfer, which enhanced photoreduction efficiency of CO2. The evolution rates of CO (47.2 μmol g–1) and CH4 (9.1 μmol g–1) using O–CN were much higher than that of bulk-CN without a cocatalyst. The main reason was the contribution of the O 2p orbital to the conduction band (CB) and valence band of O–CN, which effectively reduced the electron mass, facilitating electron/hole separation and enhancing its fluidity. Furthermore, the Fermi level also shifted to the bottom of the CB, leading to higher electron density, which further improved the CO2 reduction ability. Our study marks an important step for developing high-performance photocatalysts for reduction of CO2.

show abstract

“…6 During the massive industrial revolution, the development of catalysis technology was reported as basic science for the removal of pollutants. [7][8][9] ZnO is one of the broader bandgap materials that has a large excitation binding energy of 60 meV and is environmentally friendly and cost-effective. 10 However, it has catalytic drawbacks, including a low surface area and photon-induced electron-hole recombination.…”

Section: Introductionmentioning

confidence: 99%

Chemistry of iron and copper co-doped zinc oxide: reduction and degradation of pollutants

Belay,

Abebe,

Tsegaye

et al. 2023

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

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

Cited by 58 publications

References 32 publications

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Oxygen-Doped Red Carbon Nitride: Enhanced Charge Separation and Light Absorption for Robust CO₂ Photoreduction

Chemistry of iron and copper co-doped zinc oxide: reduction and degradation of pollutants

Contact Info

Product

Resources

About

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

Cited by 58 publications

References 32 publications

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Oxygen-Doped Red Carbon Nitride: Enhanced Charge Separation and Light Absorption for Robust CO2 Photoreduction

Chemistry of iron and copper co-doped zinc oxide: reduction and degradation of pollutants

Contact Info

Product

Resources

About

Oxygen-Doped Red Carbon Nitride: Enhanced Charge Separation and Light Absorption for Robust CO₂ Photoreduction