Department Of Environmental Science And Technology

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Browsing Department Of Environmental Science And Technology by Subject "2D layered structures"

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    Graphitic carbon nitride for photocatalytic CO2 reduction. Energy and Air Pollution.
    (Elsevier, 2022-01-15T00:00:00) Teja, Y.N.; Sakar, M.; Yogalakshmi, K.N.
    Among the various emerging photocatalytic materials, graphitic carbon nitride (g-C3N4) has gained significant importance due to their two-dimensional (2D) structure, promising electronic, optical, and interfacial properties. The features such as narrow band gap energy, reduced recombination process, enhanced transportation of charge carriers to the surrounding, and appropriate band edge potential to produce the required redox species are making the g-C3N4 as a promising candidate for various photocatalytic applications, especially for CO2 reduction into hydrocarbon fuels. It should be noted that the CO2 conversion essentially involves two simultaneous process known as the CO2 reduction and protonation. The effectiveness in such simultaneous process requires the appropriate positioning of band edge potential in the system, which can be effectively engineered in g-C3N4-based materials as compared to the other metal oxide-based systems. Interestingly, in addition to the chemical induced redox process, the CO2 conversion properties of g-C3N4 can also be attributed to their physical structures such as 2D layers and porous structures, where it causes the shifting of band edge positions and enhanced CO2 adsorption in g-C3N4. To this end, this chapter provides a glimpse of structure-property relationship of g-C3N4 based materials towards their photocatalytic CO2 conversion properties, where it discusses the various g-C3N4 material systems and their efficiency towards the conversion of CO2 into various hydrocarbon fuels under light visible light/sunlight irradiations. � 2022 Elsevier Inc. All rights reserved.