Reduced Ag NPs-modified NaTaO3 layer improves photocatalytic degradation and antimicrobial ability through LSPR effect and doping behavior

作者：Cuicui Wang, Ruixue Yin, Hairong Yin, Haoran Kang, Xin Yuan, Zhizun Yue, Chuan-Li Zhang, Hongxia Ren · 发表于：Applied Surface Science · 年份：2024 · DOI：10.1016/j.apsusc.2024.161079 · 被引用次数：14 · 研究领域：Advanced Photocatalysis Techniques、Advanced Nanomaterials in Catalysis、Quantum Dots Synthesis And Properties

Reduced Ag NPs modified Ag-doped NaTaO 3 layer photocatalysts were prepared using the hydrothermal method . The research investigated the microstructure and degradation ability of composite layer containing Ag-NaTaO 3 . Various techniques, including SEM,TEM, XRD, UV–Vis and PL analyses, were used for the evaluation. The antibacterial effect of the Ag-NaTaO 3 layers on Staphylococcus aureus (S. aureus) before and after modification with reduced Ag NPs was evaluated. The Ag-NaTaO 3 composite layer showed stronger degradation effect and bactericidal activity than NaTaO 3 under the optimal conditions (Concentration of Ag + -containing solution 0.1 mol/L, reaction temperature 200 ℃, reaction time 3 h). The degradation efficiency of Ag3-NaTaO 3 for MB was 87.6 % after 50 min, and the bactericidal inhibition rate was 100 % after 20 min. The degradation process, with electron hole ( h + ) as the main active substance, conforms to the first-order kinetic with a rate constant ( K ) value of 0.0310 min −1 . The band gaps (Eg) of the calculated pure phase NaTaO 3 and Ag3-NaTaO 3 are 3.18 eV and 2.75 eV, correspondingly. The fluorescence decay spectra indicate that the average expected lifetimes of Ag3-NaTaO 3 composites rounded is 11.45 ns, respectively. The NaTaO 3 nano-cubic structure, prepared using Ta 2 O 5 precursor, reduces the grain size, provides more surface active sites, and effectively improves the range of the NaTaO 3 photoresponse. AgNO 3 solution is used to reduce Ag NPs an...