Facile preparation of ZnO:g-C3N4 heterostructures and their application in amiloride photodegradation and CO2 photoreduction

One-Pot Thermal Synthesis of g-C3N4/ZnO Composites for the Degradation of 5-Fluoruracil Cytostatic Drug under UV-LED Irradiation

“…During the precursor mixtures, these peaks completely disappear for the composite synthetized with the highest g-C 3 N 4 content, i.e., for CN67/ZnO ( Figure 1 b). The disappearance of the XRD peaks which belongs to the ZnO phase was already reported for CN/ZnO composites with g-C 3 N 4 contents around 50 wt% [ 26 , 27 , 28 ]. It seems that above this critical percentage the C 3 N 4 polymeric network hinders the formation of crystalline ZnO particles.…”

“…The best catalytic performance was obtained with a catalyst containing a ~50 wt% of g-C 3 N 4 for the degradation of methylene blue (MB) under visible radiation ( λ > 400 nm). The same g-C 3 N 4 content was also found in the g-C 3 N 4 /ZnO composites for the degradation of methyl orange [ 27 ] and amiloride [ 28 ] under visible light irradiation. Nevertheless, other authors have reported the best catalytic performance for g-C 3 N 4 /ZnO composites containing a lower g-C 3 N 4 content [ 29 , 30 , 31 , 32 ].…”

“…However, it was clearly not only more active than pristine ZnO, but also than pure CN. As indicated, CN25/ZnO presented the best performance among all of the composites, which was due to an adequate combination of composition, morphology, homogeneity, and enhanced porous texture (this sample presented the highest mesopore volume), intermediate crystal size, and strong interaction between phases, which significantly influence on heterojunctions formation inducing changes in separation photogenerated charges and consequently, on the photocatalytic activity [ 28 , 55 ].…”

“…The results showed that the composite can be used to stabilize ZnO in photodegradation processes. Evidently, in this case, there was no photo corrosion, as the photocatalyst exhibited good photostability and performance to remove 5-FU under UV-LED irradiation, even after 12 h of use [ 26 , 28 , 32 ].…”

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

“…The degradation mechanism furnishes adequate information on the participation of the free radicals, which indirectly provides evidence for the direction of charge carrier pathways in the heterojunction. The ascorbic acid (benzoquinone, acrylamide, l -carnosine, ferulic acid), CH 3 OH (IPA, TBA), K 2 Cr 2 O 7 (AgNO 3 , DMSO), ammonium oxalate (EDTA, triethanolamine, HCOOH, NaI, CH 3 I, citric acid), and NaN 3 ( l -histidine) are normally used as scavengers for superoxide radicals, hydroxyl radicals, photogenerated electrons, holes, and singlet oxygen, respectively. ,,,,,,,,,− All these radicals participate in the mineralization of pollutants, with the prime effects depending on the nature of the heterojunction, charge carrier transfer dynamics, and electron density distribution in the pollutant molecule (Table ). Wang et al suggested that holes and hydroxyl radicals dominate the degradation mechanism under UV and visible light, respectively.…”