Carbon Dots Mediated In Situ Confined Growth of Bi Clusters on g‐C₃N₄ Nanomeshes for Boosting Plasma‐Assisted Photoreduction of CO₂

Abstract

Synthesis of high‐efficiency, cost‐effective, and stable photocatalysts has long been a priority for sustainable photocatalytic CO2 reduction reactions (CRR), given its importance in achieving carbon neutrality goals under the new development philosophy. Fundamentally, the sluggish interface charge transportation and poor selectivity of products remain a challenge in the CRR progress. Herein, this work unveils a synergistic effect between high‐density monodispersed Bi/carbon dots (CDs) and ultrathin graphite phase carbon nitride (g‐C3N4) nanomeshes for plasma‐assisted photocatalytic CRR. The optimal g‐C3N4/Bi/CDs heterojunction displays a high selectivity of 98% for CO production with a yield up to 22.7 µmol g−1 without any sacrificial agent. The in situ confined growth of plasmonic Bi clusters favors the production of more hot carriers and improves the conductivity of g‐C3N4. Meanwhile, a built‐in electric field driving force modulates the directional injection photogenerated holes from plasmonic Bi clusters and g‐C3N4 photosensitive units to adjacent CDs reservoirs, thus promoting the rapid separation and oriented transfer in the CRR process. This work sheds light on the mechanism of plasma‐assisted photocatalytic CRR and provides a pathway for designing highly efficient plasma‐involved photocatalysts.

Two viologen-functionalized pyrazolide-based metal–organic frameworks for efficient CO2photoreduction reaction

“…The above results verify that the M-VOF can affect the charge transfer owing to the viologen species, the difference between the Co-VOF and Ni-VOF further confirms that the state of viologen plays a key role in the electron transfer during the photocatalytic process. 57,58 The remarkable distinction in photocurrent responsiveness is one of the key factors for the variation in the catalytic performance between the two VOFs. All the above results mean that the diverse cultivations of metal centers make the viologen-based framework have much different photoelectric separation efficiencies due to its inherent features, which will exhibit distinct catalytic performances.…”

Review of S-Scheme Heterojunction Photocatalyst for H₂O₂ Production

“…photocatalytic H2O2 production g-C3N4 as an emerging organic semiconductor photocatalyst, possesses a stacked two-dimensional structure of tri-s-triazine linked via tertiary amines. Owing to its unique structure and physicochemical properties, g-C3N4 exhibits a promising photocatalytic ability and a great potential in various photocatalytic fields [71][72][73][74] . In addition, g-C3N4 has a suitable band structure, which makes it provide sufficient redox potential for photocatalytic H2O2 production.…”

Constructing Bi2MoO6/Pomelo-Peel-Derived Carbon 0D/3D Heterojunctions To Enhance Photothermal Catalytic CO2 Reduction in Full Solar Spectrum

“…As a result, many electrons are transferred from around the Bi atom to around the C atom, which is attributed to the transfer of many photogenerated electrons generated by Bi 2 MoO 6 to the carbon framework surface of the CPP, which once again defines the direction of electron migration across the interface. The characteristic peak of the −C−O bond is at 287 eV, 8,20,39 and the binding energy of CPP/BM QDs and CPP/BM QDs corresponding to the C− O bond shifts toward higher binding energy compared to BM QDs, 40,41 which indicates that C and Bi are interconnected through oxygen-containing functional groups, thus forming a C−O−Bi bond whose electron-losing nature fully suggests that C−O−Bi achieves an interfacial electronic bridge. 42 Besides, the successful construction of the C−O−Bi structure can be confirmed by the ζ potential.…”

“…At present, the global use of fossil fuels is experiencing exploding growth . The large amount of greenhouse gas CO 2 emitted into the atmosphere from combustion products has caused a very serious greenhouse effect, − and the consequent increase in global temperature, soil acidification, global climate deterioration, and other environmental temperatures has seriously infringed on human life. − Therefore, mitigating the greenhouse effect and achieving carbon neutral development have become a critical scientific issue that needs to be addressed urgently. , …”

“…5−7 Therefore, mitigating the greenhouse effect and achieving carbon neutral development have become a critical scientific issue that needs to be addressed urgently. 8,9 Converting greenhouse gas CO 2 into high value-added hydrocarbon fuels has been given new expectations in mitigating the greenhouse effect and achieving carbon neutrality. 10−12 Photocatalytic CO 2 reduction, which uses photochemical reactions to convert CO 2 into high value-added hydrocarbon fuels such as CO and CH 4 driven by sunlight, has become a new favorite in present research.…”