Fig. 6From: Photocatalytic Applications of Heterostructure Graphitic Carbon Nitride: Pollutant Degradation, Hydrogen Gas Production (water splitting), and CO2 ReductionA systematic depiction of the general mechanism of photocatalytic semiconductor. Reproduced with permission [29]. Copyright 2013 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimBack to article page