| 초록 |
Heterojunction structures are attracting lots of attention for enhancing the electron injection across the interface. This work consists mainly on the production of hybrid nanostructures based on PANI (polyaniline) composites were synthesized by dilute polymerization of TiO2 nanorods obtained by controlled hydrothermal method and aniline supported on FTO glass. The morphology, composition, and electrochemical behavior of the TiO2/PANI core/shell structure are studied and compared with those of the TiO2 nanorods on FTO glass substrate. The Electrochemical measurements were performed using a 1 kW xenon lamp (Newport) with its infrared wavelengths filtered out by water, and wavelengths below 420 nm removed by an optical filter, enabling measurements under visible light. The light irradiance, measured by a thermopile detector, was 100 mW/cm2. A monochromator (74,000, Newport) was used to investigate the monochromatic responses (for IPCE, applied bias photon to current efficiency (ABPE), and band gap energy measurements) of samples.1 Clearly anchored PANI shell inhibit efficiently the recombination between the photo-generated electrons and holes (e-h) making them available for water oxidation. This work is very promising. The adopted chemical approach to produce such a nanostructure is very versatile and easy to achieve. Different polymerization PANI shell could be tested and the resulting heterostructures could be evaluated for the desired application. Several techniques were carried out to characterize the resulting heterojunction including FESEM, TEM, XRD and DRUV-Vis absorption spectroscopy. |
