RPG Student List



Doctor Candidate in Chemical and Biomolecular Engineering

Supervisor: Prof. King Lun YEUNG


Research Topic

Design of Nanophotoelectrochemical Device for Solar Conversion


As a consequence of rapid growing world population, the global energy demand is increasing drastically, and is forecasted to be doubled by 2050. Currently, most of the global energy relies on the combustion of fossil fuels, which are deteriorating the environment due to massive release of CO2. The searching for more sustainable and environmental friendly energy sources is therefore a crucial issue. One of the most promising approaches for sustainable energy production is to convert CO2 back into fuels or value-added chemicals by using solar energy as the driving force. This process is commonly known as artificial photosynthesis. In the artificial photosynthesis process, the photocatalyst is used to capture the energy from sunlight to convert CO2 into hydrocarbon compounds.

Among other available photocatalyst, TiO2 has several advantages that make it a suitable catalyst for CO2 reduction. However, the main two drawbacks of using TiO2 catalyst are high charge recombination rate and wide band gap energy. Different strategies for TiO2 modification, such as metal or non-metal doping, dye sensitization, semiconductor coupling, and nanostructure engineering, have successfully shown to help improve the performance of the catalyst. The hybrid nanostructured catalyst is one of the interesting methods for the catalyst development because it can greatly increase the active surface area of the catalyst and improve the charge separation process. In this research, the hybrid nanostructured TiO2, consisting of doped titanate nanorod on the TiO2 nanorod arrays, would be synthesized, and the prepared catalyst will be tested for photocatalytic CO2 reduction performance.