Visible-light responsive MOF encapsulation of noble-metal-sensitized semiconductors for high-performance photoelectrochemical water splitting

作者：Dou, Yibo; Zhou, Jian; Zhou, Awu; Li, Jian-Rong^*; Nie, Zuoren^*

来源：Journal of Materials Chemistry A, 2017, 5(36): 19491-19498.

DOI：10.1039/c7ta06443h

• PHOTOCATALYTIC HYDROGEN-PRODUCTION
• ORGANIC FRAMEWORKS
• NANOWIRE ARRAYS
• SOLAR
• NANOPARTICLES
• SHELL
• NANOSTRUCTURES
• CATALYSTS
• PHOTOCATHODES
• NANOMATERIALS

A strategy that visible-light responsive zeolitic-imidazolate-framework-67 ( ZIF-67) encapsulates noblemetal sensitized semiconductors, ZnO@M ( M = Au, Pt, and Ag) to fabricate composite catalysts for photoelectrochemical (PEC) water splitting is proposed. The obtained ZnO@M@ZIF-67 catalysts have good catalytic performance, particularly, the ZnO@Au@ZIF-67 exhibits quite improved photoconversion efficiency and photocurrent density, superior to most of the reported photoelectrode catalysts. This can be attributed to the wider solar spectra harvesting capability originating from visible-light responsive ZIF67 and UV-light active ZnO. Simultaneously, their integration enables interfacial electrons in the ZIF-67 shell to easily transfer to the ZnO@Au core, providing good electron-hole separation. In addition, the porous ZIF-67 as a protective shell ensures structural robustness, while maintaining fast ion or gas bubble diffusion through its pores, accounting for stable and excellent PEC performance.

• 出版日期2017-9-28
• 单位北京工业大学