| Summary: | 碩士 === 國立中央大學 === 機械工程學系 === 104 === In this study, we attempted prepare Cu2O nanoparticles by liquid phase synthesis and fabricated them on Sn: In2O3 glass substrates as photocathode for photoelectrochemical (PEC) water splitting application via dipping method.
Effect of percusor concentration on microstructural and optical proprties of Cu2O powder were investigated. On the ther hand, the dipping parameters (i.e.,
heating temperature, heating time and layers) of Cu2O photocathode also were discussed. Result from X-ray diffraction patterns, all sample were revealed the
Cu2O phase. The Cu2O nanoparticles were affected by percusor concentration, the average particle size were increased from 18 to 59 nm with increasing
percusor concentration. UV-vis. absorbance spectra shown all samples have an absorption peak at 675 nm wavelength in visible region. From fabrication of photocathode, the optimized dipping process conditions was 250 oC for 15min
and four dipping times. Base up our observation, the four dipping times Cu2O photocathode had a better photocurrent (-0.065 mA/cm2) due to higher carrier concentration and lower resistance. Also, the four dipping times Cu2O
photocathode revealed a better anti-corrosion property analyzed by open circuit potential (OCP) and Tafel plot.
|
|---|
