Photosensitized reduction of water to hydrogen using novel Maya blue-like organic-inorganic hybrid material.
On the basis of the understanding that membranes play an important role in the separation of the intermediate photoproducts in the photosynthetic process, a novel efficient hydrogen evolution system was constructed with Maya blue-like organic-inorganic hybrid material as a photocatalyst, in which palygorskite acts as matrix and Eosin Y as a photosensitizer. Under visible light irradiation (lambda > or = 420 nm), the highest rate of hydrogen evolution and apparent quantum yield are about 3247.2 micromol h(-1) (g Eosin Y)(-1) and 12.5%, respectively. Negatively charged palygorskite particles could control the photosensitized electron-transfer reaction by means of electrostatic interaction. Based on the activities of hydrogen generation and the experimental measurements of UV-vis absorbance and fluorescence, a probable mechanism for photosensitized hydrogen evolution was postulated.
Zhang
Xiaojie
X
State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
Jin
Zhiliang
Z
Li
Yuexiang
Y
Li
Shuben
S
Lu
Gongxuan
G