Palladium-decorated hierarchical titania constructed from the metal-organic frameworks NH2-MIL-125(Ti) as a robust photocatalyst for hydrogen evolution

No Thumbnail Available
File version
Author(s)
Yan, Baolin
Zhang, Lijuan
Tang, Zhiyong
Al-Mamun, Mohammad
Zhao, Huijun
Su, Xintai
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2017
Size
File type(s)
Location
License
Abstract

Engineering metal-organic frameworks (MOFs) into hierarchical structured materials is crucial for providing a viable platform to construct efficient catalysts and broaden their applications in energy conversion and photocatalysis. Here, a simple and efficient solid-state pyrolysis of Ti-MOFs (NH2-MIL-125) sacrificial template combined with a photo-reduction process was developed to construct a series of hierarchical TiO2 decorated with Pd nanoparticles. The hierarchical TiO2 inherited the well-defined rounded rectangular submicron-tablet from NH2-MIL-125 precursor and was constituted of uniform anatase TiO2 nanoparticles with an average size of 12 nm. Furthermore, the photocatalytic activity for the hydrogen production from water-methanol solution was improved by the optimization of the content of Pd as a cocatalyst, and the maximum was achieved with a Pd loading of 1.5%. The rate of H2 evolution of 1.5% Pd decorated hierarchical TiO2 (1.5% Pd/TiO2) reached to 979.7 μmol h−1 and 112.7 μmol h−1, under UV–vis light and simulated solar light, respectively. This unusual photocatalytic activity may be resulted from the positive synergetic effect of efficient light absorption, promoted separation and migration of photo-induced electron-hole carriers. The work highlights the potential of the MOFs-based hierarchical TiO2 in the photocatalytic water splitting under solar light.

Journal Title
Applied Catalysis B: Environmental
Conference Title
Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject
Physical chemistry
Physical chemistry not elsewhere classified
Chemical engineering
Environmental engineering
Persistent link to this record
Citation