Novel Z-scheme composite Ag2CrO4/NG/polyimide as high performance nano catalyst for photoreduction of CO2: design, fabrication, characterization and mechanism by Zhou, Liang, Kamyab, Hesam, Surendar, Aravindhan, Maseleno, Andino, Ibatova, Aygul Z., Chelliapan, Shreeshivadasan, Karachi, Nima, Parsaee, Zohreh