Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4. Issue 7 (24th January 2020)

• Record Type: Journal Article
• Authors: Aleksandrzak, Malgorzata; Sielicki, Krzysztof; Mijowska, Ewa
• Is Part Of: RSC advances. Volume 10:Issue 7(2020)
• Page Start: 4032
• Page End: 4039
• Publication Date: 2020-01-24
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra08388j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN). Abstract : The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN). Thermal treatment of MOF5 affected the formation of ZnO nanoparticles which played the role of co-catalyst for H2 evolution. Moreover, significant band-gap narrowing of MOF5 was observed, which also affected the narrowing of the hybrid band gap. The appropriate conduction band position of the carbonized MOF allowed photogenerated electron transfer from gCN to the carbonized MOF, hence, improving the separation of the charge carriers and reducing the overpotential for H2 generation. The mechanism of the photocatalytic process was also discussed.