講演情報
[24p-P05-11]Enhanced Photo-Piezocatalytic Performance through Synergistic Effects for Silver-Modified BaTiO3/TiO2 Heterostructures.
〇(B)YenChang Chen1, TingHan Lin1, JiaMao Chang1, MingChung Wu1 (1.Chang Gung Univ.)
キーワード：
Heterostructure、Piezocatalytic、Photocatalytic
With the substantial expansion of industrial scale, the pervasive pollution from organic contaminants increasingly threatens our daily lives. This not only endangers human health but also exerts a detrimental impact on the environment. To address these issues, we propose an innovative approach combining photocatalysis and piezocatalysis for continuous degradation. By utilizing the hydrothermal synthesis technique, we are able to in-situ produce a nanocomposite catalyst, Ag modified BTO/TiO2, which is designed based on the photocatalytic properties of silver-modified titanium dioxide (TiO2) and the piezocatalytic properties of barium titanate (BaTiO3, BTO). By utilizing Ag-doped titanium dioxide as a structural template and meticulously adjusting the compositions, we can precisely tailor the Ag-modified BTO/TiO2 heterostructures. It also varied the morphologies, crystal structures, further resulting in the related performance in organic dye degradation. Furthermomre, we investigate the possible mechanisms to unveil the unique synergistic effects of the catalyst. Attributed to the synergistic effects of photocatalysis and piezocatalysis, the optimized heterostructure photo-piezocatalyst demonstrates significantly enhanced catalytic performance under UV light irradiation and ultrasonic vibration. Compared to piezocatalysis, the heterostructure Ag modified BTO/TiO2 under photo-piezocatalysis conditions achieves approximately 99% degradation efficiency in a 10 ppm methyl orange solution within 150 minutes. The calculated reaction rate constant (k) is 0.01781, a 20% increase compared to that piezocatalysis. This indicates that the integration of BTO and TiO2 facilitates an efficient charge transfer route, while UV light additionally enhances the reaction in the Ag-BTO/TiO2 heterostructure, serving as a nanogenerator.