http://scholars.ntou.edu.tw/handle/123456789/214 Sun, 26 Apr 2026 04:56:24 GMT 2026-04-26T04:56:24Z http://scholars.ntou.edu.tw:80/retrieve/96/光電與材料科技學系.png http://scholars.ntou.edu.tw/handle/123456789/214 http://scholars.ntou.edu.tw/handle/123456789/26536 標題: The effect of Ta segregation on the corrosion resistance of the Fe₃₀Ni₃₀Cr₃₀Al_10-xTa_x high entropy alloys in lead-bismuth eutectic at 800 °C 作者: Wang, Weibing; Kai, Wu; Yang, Tao; Chen, Da; Zhang, Jixun; Luan, Junhua; Yang, Chin-Hua; Wang, Bo; Zhang, Meng; Kai, Ji-jung 摘要: Lead-bismuth eutectic (LBE)-cooled reactors were considered promising candidates for Generation IV nuclear reactor systems due to the favorable physical properties and exceptional safety performance of LBE. This study investigated the role of Ta in enhancing the corrosion resistance of Fe30Ni30Cr30Al10-xTax high-entropy alloys (HEAs) exposed to static LBE at 800 degrees C. Multiscale characterization revealed that Ta-free HEA (0Ta-HEA) formed an outer FeCr2O4 spinel layer, which permitted significant LBE penetration and inward diffusion of oxygen within the first 48h. In contrast, the 2 at.% (in atomic percent) Ta HEA (2Ta-HEA) exhibited superior corrosion resistance, with corrosion depth reduced by similar to 40 %. The low solubility of Ta in LBE led to its rapid saturation and local precipitation, which, in turn, formed protective phases comprising a mixed layer of Al2O3, Cr-rich phase, and FeCr phase. After 168 h of exposure, the competitive mechanism between dissolution and oxidation dominated in the 2Ta-HEA. The mixed layer formed during the initial stage of corrosion gradually evolved into a double-layered scale, consisting of an outer Ta-rich LBE layer and an inner layer of Cr2O3 and FeCr2O4. The discontinuous Al2O3 only inhibited the penetration of LBE at the initial stage of corrosion. These findings highlighted Ta as a strategic alloying element for mitigating LBE corrosion in nuclear applications, stabilizing interfaces, and minimizing elemental loss. Thu, 01 Jan 2026 00:00:00 GMT http://scholars.ntou.edu.tw/handle/123456789/26536 2026-01-01T00:00:00Z http://scholars.ntou.edu.tw/handle/123456789/26535 標題: Charge transport modulation in photoreduction-derived metal-polymer/ oxide hybrid interfaces for bifunctional performance 作者: Liang, Yuan-Chang; Lu, Rui-Ling 摘要: The study focused on developing porous ZnO nanosheets through a low-temperature hydrothermal method, followed by spin-coating with PANI and adjusting the photoreduction time to create Ag-particle-decorated ZPA composites. The objective was to examine how modulation of the interfacial structure influences both photoelectrochemical and antibacterial performance. As an n-type semiconductor, ZnO encounters challenges such as surface carrier recombination and photocorrosion. However, the introduction of PANI facilitates the formation of a p-n heterojunction, which effectively promotes the separation of charge carriers. Additionally, PANI enhances the absorption of visible light and improves conductivity, thereby increasing interfacial transport efficiency. Controlled photoreduction generates silver particles that form Schottky contacts with the ZnO/PANI composite, further enhancing visible light absorption, electron trapping, and carrier transport. The ZnO/PANI/Ag composite exhibits significant antibacterial activity against both Escherichia coli and Staphylococcus aureus, thereby achieving robust photoelectrochemical performance alongside effective antibacterial functionality. This study underscores the importance of interfacial engineering in the development of multifunctional photoelectronic materials for antibacterial applications. Thu, 01 Jan 2026 00:00:00 GMT http://scholars.ntou.edu.tw/handle/123456789/26535 2026-01-01T00:00:00Z http://scholars.ntou.edu.tw/handle/123456789/26533 標題: Engineering Ag-Bi₂O₃/WO₃ nanocomposites with porous morphology for photocatalytic enhancement 作者: Liang, Yuan-Chang; Chen, Shang-Hao; Chang, Kun-Hsien 摘要: We successfully synthesized Ag-Bi2O3/WO3 composites with a porous sheet morphology using chemical bath deposition and sputtering methods. Structural and compositional analyses indicate that varying the sputtering time of silver (Ag) nanoparticles results in their successful decoration onto the Bi2O3/WO3 composites. The Ag-Bi2O3/WO3 composites demonstrated superior electrical and photocatalytic properties compared to both the Bi2O3/WO3 composite and the WO3 underlayer film. This can be attributed to the Schottky barrier and photo-induced S-scheme charge transfer mechanism in the Ag-Bi2O3/WO3 composites. The bending of the energy bands at the Bi2O3/WO3 composites interface makes Bi2O3/WO3 composites a S-scheme charge transfer mechanism under irradiation. This successfully and effectively retains photo-generated carriers with a strong redox ability for photodegradation towards organic dye. Furthermore, Ag nanoparticles promote the visible light absorption ability and transfer of photo-generated electrons in the Ag-Bi2O3/WO3 composite system, further improving the photoactive performance. The current research provides the design of metal particle-decorated porous composites for photocatalytic applications. Thu, 01 Jan 2026 00:00:00 GMT http://scholars.ntou.edu.tw/handle/123456789/26533 2026-01-01T00:00:00Z http://scholars.ntou.edu.tw/handle/123456789/26509 標題: Tunable light emissions of PEAI-doped FA0.6Cs0.4Pb(I0.6Br0.4)3 thin films via manipulating self-healing and phase segregation effects 作者: Chandel, Anjali; Tsai, Chia-Lung; Chang, Sheng Hsiung 摘要: The near-infrared emission intensity of aged FA0.6Cs0.4Pb(I0.6Br0.4)3 mixed perovskite films are increased by more than 2 times via the surface passivation with phenethylammonium iodide (PEAI) molecules. When the PEAI concentration is 3 mg/mL, the near-infrared emission of the laser-induced mixed perovskite film is stable and fixed at the peak wavelength of about 740 nm after 20 s. The X-ray diffraction patterns, Urbach energy values, atomic-force microscopic images, and time-dependent two-photon photoluminescence (TPPL) spectra are used to understand the time-dependent PL spectra and enhanced PL intensity of the mixed perovskite thin films without and with the PEAI additives. Our findings provide a method to adjust the light emission wavelength of mixed perovskite thin films in the near-infrared wavelength range. Wed, 01 Jan 2025 00:00:00 GMT http://scholars.ntou.edu.tw/handle/123456789/26509 2025-01-01T00:00:00Z