Enhancing the Performance of MoS3/Graphene Composite Photocatalyst toward Hydrogen Prodction by Using the Surface Plasmon Resonance Based on the Au@Ag Nanoparticles with Core-shell Structure

• Main Authors: CHEN,CHUN-CHE, 陳俊哲
• Other Authors: LIN,TSUNG-WU
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/2br64m

碩士 === 東海大學 === 化學系 === 106 === Hydrogen is considered a kind of energy fuels of cleanliness and usefulness. Hydrogen burning is the process of water transformation after releasing energy without pollution.Zero carbon emission can be acieved. However, Pt is too scarce and expensive to utilize widely. Therefore, this study is developing low cost and highly efficient catalyst for hydrogen evolution application in photocatalytic decomposition of water. In this project, we successfully synthesized core-shell structure Au@Ag nanoparticles and loaded it with the MoS3/rGO. To form a photocatalytic composite, we chose the ErY as a photosensor which SPR is similar to the core-shell Au@Ag nanoparticles.Because of Surface Plasmon Resonance, photon effects greatly on the surface that improves quantum conversion efficiency and photocatalytic activity. Besides, as the concentration of ammonium tetrathiomolybdate ((NH4)2MoS4 ) increased, the amount of hydrogen production by the MoS3/rGO composite also increased.However, there is non the same phenomenon the amount of the hydrogen production by MoS3/Au@Ag/rGO composite.We might predict that the coverage of gold and silver core-shell nanoparticles reduce the absorption of visible light because of the excessive load concentration of (NH4)2MoS4. When the concentration of (NH4)2MoS4 is 3mM, the amount of hydrogen producs most highly by the MoS3/Au@Ag/rGO , and the MoS3/rGO with the same loading concentration increases 290% of the hydrogen production. We also do a lot of control experiments to verify the role of each material in the composite. To support the consequence, fluorescence spectrometer, single wavelength test and photocurrent experiments are used. We also do the composite long term stability test. Based on the above results, we discussed the photocatalytic hydrogen production mechanism of MoS3/Au@Ag/rGO.