With the vigorous progress of industrialization,energy shortage and environmental contamination emerge increasingly serious.Photocatalysis technology is known as a hopeful approach to resolving the above crises owing to its numerous prominent advantages and widespread applica-tions.Among various photocatalysts,graphitic carbon nitride(g-C3N4)has been broadly applied in fields of fuel production and environment purification because of its unique electronic structure,extreme thermal stability,and prominent photo-electrical activity.However,single-component g-C3N4,similar to other photocatalysts,usually suffer from low photocatalytic efficiency due to the fact that single-constituent photocatalysts cannot synchronously equip with strong redox abilities of photogenerated charges and high light energy utilization.Fortunately,constructing Step-scheme(S-scheme)hetero-junctions between g-C3N4 with other semiconductor photo-catalysts can simultaneously overcome the typical shortcomings of low light energy utilization,rapid re-combination,and weak redox abilities of carriers,thus pro-minently boosting its catalytic reaction rate.In view of the currently extensive reports of g-C3N4-based S-scheme hetero-junctions,this review presents a relatively comprehensive comment on the latest research progress of the background,the proposal of conception,fundamental theory,design and preparation,characterization methods of g-C3N4-based S-scheme heterojunctions.Additionally,various applications of g-C3N4-based S-scheme heterojunctions have been detailly illustrated through example discussion and list comparison,involving photocatalytic H2 generation,CO2 reduction,H2O2 evolution,pollutant degradation,and others.Finally,the re-search progress and shortcomings of g-C3N4-based S-scheme heterojunctions are summarized,and the future research di-rection is prospected.
Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHubei Provincial Natural Science Foundation of ChinaResearch Project of Hubei Provincial Department of Education
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