Carbon self-doping induced high electronic conductivity and photoreactivity of g-C3N4

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Abstract

We theoretically and experimentally demonstrate that carbon self-doping could induce intrinsic electronic and band structure change of g-C(3)N(4)via the formation of delocalized big π bonds to increase visible light absorption and electrical conductivity as well as surface area and thus enhance both photooxidation and photoreduction activities.

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Simple pyrolysis of urea into graphitic carbon nitride with recyclable adsorption and photocatalytic activity

Jinghai Liu, Tiekai Zhang, Zhichao Wang … (2011)

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mpg-C(3)N(4)-Catalyzed selective oxidation of alcohols using O(2) and visible light.

Fangzheng Su, Smitha C Mathew, Grzegorz Lipner … (2010)

Mesoporous carbon nitride (mpg-C(3)N(4)) polymer can function as a metal-free photocatalyst to activate O(2) for the selective oxidation of benzyl alcohols with visible light, avoiding the cost, toxicity, and purification problems associated with corresponding transition-metal systems. By combining the surface basicity and semiconductor functions of mpg-C(3)N(4), the photocatalytic system can realize a high catalytic selectivity to generate benzaldehyde. The metal-free photocatalytic system also selectively converts other alcohol substrates to their corresponding aldehydes/ketones, demonstrating a potential pathway of accessing traditional mild radical chemistry with nitroxyl radicals.