Study of photocatalytic hydrogen production and preparation on mesoporous metal oxide

• Main Authors: Wei-Lin Wang, 王濰琳
• Other Authors: Hsin-yu Lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/33640480487982560606

碩士 === 國立東華大學 === 材料科學與工程學系 === 97 === Develop photocatalyst system for hydrogen generation from water gives us a chance to produce hydrogen fuel by an almost inexhaustible renewable source. The splitting of water into hydrogen and oxygen has been studied extensively over the past decade. There are two parts in our experiment ,the first part：A series of mesoporous Nb2O5, TiO2, and Ti–Nb mixed oxides was synthesized using NbCl5 and /or TTIP as the starting material and triblock copolymer P123 as template. We investigated the influence of titanium content and the temperature of thermal treatment on the synthesis and characteristics of the mesoporous Ti–Nb mixed oxides, and their photocatalytic activities for water splitting. The materials were characterized by powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive spectrometer, N2 sorption and UV–vis spectroscopy. The surface area of mesoporous Nb2O5 was greater than 100 m2/g with a wormhole framework. The optimization of synthesis condition of the mesoporus Ti–Nb oxides catalyst contained a large fraction of highly dispersed titanium (Ti/Nb = 0.8) species intercalated into the framework of mesoporous niobium oxides and exhibited a high photocatalytic activity for water splitting reaction which was about 3 times as compared to mesoporous Nb2O5 and was about 100 times higher than commercial bulk Nb2O5. In mesoporous TiO2 photocatalytic activities, we found pure anatase titanium oxide with higher activity than mixed phase (anatase and rutile phase) titanium oxide.