High-performance for hydrogen evolution and pollutant degradation of reduced graphene oxide/two-phase g-C3N4 heterojunction photocatalysts

• Published in: Environmental science and pollution research international Vol. 25; no. 15; pp. 14486 - 14498
• Main Authors: Song, Chengjie, Fan, Mingshan, Shi, Weidong, Wang, Wei
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2018; Springer Nature B.V
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Carbon nitride; Catalytic activity; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental degradation; Environmental Health; Environmental science; Evolution; Graphene; Heterojunctions; Hydrogen evolution; Interlayers; Irradiation; Light irradiation; Photocatalysis; Photocatalysts; Photoelectric effect; Photoelectric emission; Pollutants; Pollution control; Radiation; Recombination; Research Article; Rhodamine; Waste Water Technology; Water Management; Water Pollution Control; Homojunction g-C; Photocatalysis; N; Hydrothermal reduction method
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-018-1502-8

We have successfully synthesized the composites of two-phase g-C 3 N 4 heterojunction photocatalysts by one-step method. And the reduced graphene oxide/two-phase g-C 3 N 4 heterojunction photocatalyst was fabricated via a facile hydrothermal reduction method. The characterization results indicated that the two-phase g-C 3 N 4 was integrated closely, and the common phenomenon of agglomeration for g-C 3 N 4 was significantly reduced. Moreover, the oxidized graphene was reduced successfully in the composites and the graphene was overlaid on the surface or the interlayers of g-C 3 N 4 heterojunction composite uniformly. In addition, we have carried out the photocatalytic activity experiments by H 2 evolution and rhodamine B removal, tetracycline removal under the visible light irradiation. The results revealed that the composite has improved the separation efficiency a lot than the pure photocatalyst. The photocurrent test demonstrated that the recombination of electrons and holes were efficiently inhibited as well as enhanced the photocatalytic activity. The 0.4% rGO loaded samples, 0.4% rGOCN2, own the best performance. Its rate of H 2 evolution was 15 times as high as that of the pure g-C 3 N 4 .