题 目：Sensitized TiO2 Nanorods and Inverse Opals for Sacrificial Water Splitting
报告人：Prof. Hong Jin Fan (Assistant Prof. Nanyang Technological University, Singapore)
TiO2 nanostructures are being extensively studied for the solar energy applications, such as DSSC, QDSSC, photocatalysts and solar water splittings. When working as photoelectrodes in these energy devices, TiO2 nanomaterials with tailored structural complexity and appropriate heterojunction formation will provide new pathways for performance enhancement. In this talk I will discuss the application of two types of TiO2 nanostructures (1D nanorods and 3D inverse opals) in photoelectrochemical (PEC) sacrificial water splitting. Chalcogenide quantum dots (QDs) and nanorods are fabricated using either SILAR, ion-exchange reaction, or CVD methods. Their sensitizer properties to TiO2 will be presented and systemically discussed in terms of bandgap and band alignments at the TiO2-sensitzer interfaces. A novel method by combining atomic layer deposition and ion exchange reaction (ALDIER) towards homogeneous coating of photosensitzer on arbitrary TiO2 substrates will be introduced. Furthermore, a smart combination of 3D inverse opal with 1D nanorods allows enhanced light harvesting and higher sensitizer loading, and subsequently higher photocurrent levels.
Dr. Fan Hongjin obtained his PhD in National University of Singapore in 2003. After that he did postdoc in Max-Planck-Institute in Germany and Cambridge University in UK. Since 2008 he is an Assistant Professor in Nanyang Technological University and a member of the Energy Research Institute @ NTU. He has co-authored 105 journal papers including 4 invited review articles. His work has received >3200 citations with an H index of 30. Dr. Fan has organized conference symposia in MRS 2008, 2010 and ICMAT 2011, 2013. He is leading his group of “Functional Nanomaterials and Atomic Layer Deposition” at NTU working on the design and fabrication of nanostructures for energy generation and storage (mainly photoelectrochemical water splitting and supercapacitor), as well as nanophotonic and plasmonics. His research was selected 10 times for highlighting as covers of high-profile journals, such as Advanced Materials, Advanced Functional Materials, ACS Nano, Small.