Fig. 5From: Photocatalytic Applications of Heterostructure Graphitic Carbon Nitride: Pollutant Degradation, Hydrogen Gas Production (water splitting), and CO2 ReductionA comparison of the charge transfer between type II heterojunction (a) and Z-scheme heterojunction (b). Reproduced with permission [3]. Copyright 2017 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimBack to article page