报告时间：10月29日（星期二）10:00-11:30
报告地点：师昌绪楼403会议室
报告人简介:
Teera Butburee
National Nanotechnology Center,National Science and Technology Development Agency,111 Thailand Science Park,
Pathum Thani 12120,Thailand
e-mail: teera.but@nanotec.or.th
NANOARCHITECHTURALDESIGNSANDTECHNICALSYNTHESIS OFTITANIUMDIOXIDES FOREFFICIENTARTIFICIALPHOTOSYNTHESIS
Titanium dioxide (TiO2) has been the most widely used material among photo-active metal-oxide semiconductors, due to its high photo/chemical stability, respectable photocatalytic activity, and low cost. Efficient charge separation and transport are the prerequisites for photovoltaic and photoelectrochemical applications, but the conventional particle-based films usually suffer from severe charge recombination and poor charge transport. Our research has tried to address these limitations by developing the synthesis techniques to directly grow the novel nano-architectures of TiO2 on transparent conductive substrates, forming the thin films which are promising for various photoelectrochemical devices. For example, porous single-crystalline TiO2 with shortened charge migration length and excellent charge delivery is grown on Fluorine-doped Tin Oxide (FTO) glass, showing near theoretical performance in photoelectrochemical water splitting.1 TiO2 with controllable crystal facets is vertically grown on FTO substrate for selective photoelectrochemical catalysis.2 Branched TiO2 nanostructures with tunable dimensions and crystal phases,3 as well as their composites,4 exhibit outstanding photocatalytic performance towards artificial photosynthesis due to their enlarged surface area while keeping good charge transport. The photo/electrochemical properties of these unique nanostructures were systematically studied by various techniques such as linear sweep voltammetry (LSV), chronoamperometry (CA), cyclic voltammetry (CV), electronic impedance spectroscopy (EIS), intensity-modulated photocurrent spectroscopy (IMPS), and Mott-Schottky analysis. We aim to adapt these nanocatalysts for green and sustainable technologies such as green hydrogen production, carbon dioxide reduction, and biorefinery.
References:
1. T. Butburee et al., Advanced Materials, 2018, 30, 1705666.
2. T. Butburee et al., Journal of Materials Chemistry A, 2019, 7, 8156-8166.
3. T. Butburee et al., Journal of Materials Chemistry A, 2021, 9, 23313-23322.
4. T. Butburee et al., Nano Energy, 2019, 62, 426-433.
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