CO2 reduction FeTCPP@CNNS GO PANI PTCDA QA75.5-76.95 Rh active sites modification S-scheme heterojunction Sb2S3 SrTiO3 TK7885-7895 ZnO amine-based pharmaceutical artificial neural networks (ANNs) black g-C3N4 catalyst cyano group defects degradation donor-acceptor energy conversion evolutionary algorithms exfoliation g-C3N4 g-C3N4 nanosheets g-C3N4@Cu0.5In0.5S graphene graphitic carbon nitride hollow nanostructure hydrogen peroxide knowledge-based expert systems