Hydrogen Titanate Heterostructure for Photocatalytic and Surface-Enhanced Raman Spectroscopy Applications

• Main Authors: LIN, CHIA-CING, 林佳慶
• Other Authors: CHANG, YU-CHENG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/96279363500756163234

碩士 === 逢甲大學 === 材料科學與工程學系 === 105 === There are three subjects in this thesis, which are the synthesis and application of hydrogen titanate nanowires, hydrogen titanate/zinc oxide nanostructures, and hydrogen titanate/molybdenum disulfide heterostructures, respectively. First, hydrogen titanate nanowires have been directly grown on the titanium foil by a facile hydrothermal method and ion exchange with HCl. The concentration of reaction precursor and reaction time can be used to control the morphology, size, and density of hydrogen titanate nanostructures. The hydrogen titanate nanowires exhibit higher photocatalytic performance in UV light or visible light irradiation. The appropriate Ag sputtering durations on the hydrogen titanate nanowires were optimized to yield the greatest surface-enhanced Raman scattering (SERS) effect in the rhodamine 6G molecule. Second, hydrogen titanate/zinc oxide heterostructures have been successfully synthesized on the titanium foil by a facile hydrothermal method and ion exchange with HCl, and wet chemical growth method. The double-sided plasmonic Ag nanoparticles have been deposited on the hydrogen titanate/zinc oxide heterostructures by a facile ion sputtering method. The resultant quaternary H2Ti3O7/Ag/ZnO/Ag heterostructures have exhibited the highest SERS effect for rhodamine 6G and amoxicillin detection, suggesting their great potential as a convenient SERS substrate for biosensor applications. Third, hydrogen titanate/molybdenum disulfide heterostructures have also been successfully synthesized on the titanium powder by a two-step hydrothermal processes. The photocatalytic activities of the different concentration of molybdenum disulfide reaction precursors were evaluated in the photocatalytic degradation of rhodamine 6G under 10 W UV and visible light irradiation. The hydrogen titanate/molybdenum disulfide heterostructures revealed much higher photodegradation efficiency than commercial ZnO or TiO2 nanopowders. The hydrogen titanate/molybdenum disulfide heterostructures can be used in solar energy conversion, water splitting, and other related applications.