牙科修复用BiOIO3/g-C3N4复合纳米光催化剂的制备与表征

目的 研究不同剂量NaOH条件对制备BiOIO3/g-C3N4复合纳米光催化剂的结构形貌及其可吸收光谱的影响,为研制适用于口腔修复纳米光催化功能性材料提供依据.方法 水热法制备BiOIO3/g-C3N4,通过XRD(X射线衍射仪)、SEM(扫描电镜图)和UV-vis(紫外-可见光吸收光谱)对其形貌、结构、分子组成和理化...

Preparation and characterization of BiOIO3/g-C3N4 composite nano-photocatalyst for dental restoration

Objective The aim of this study was to detect the effects of different doses of NaOH on the structure and morphology of the as-prepared BiOIO₃/g-C₃N₄ and its absorption of spectroscopy, so as to provide a basis for the development of functional nano-photocatalytic materials suitable for dental restoration. Methods BiOIO₃/g-C₃N₄ was prepared by hydrothermal method. The morphology, structure, molecular composition and physical and chemical properties of BiOIO₃/g-C₃N₄ were characterized by XRD, SEM and UVvis. Results BiOIO₃/g-C₃N₄ (BC-5) was prepared in the presence of 5 mol/L NaOH solution. The strength of peak (010) and peak (040) was the weakest, and the strength of peak (121) was the strongest. The morphology of BiOIO₃/g-C₃N₄ (BC-5) was square-shaped with rounded corners, the size ranged from 100 nm to 200 nm, and the thickness was about 60 nm. It is rich in heterostructures, the band gap is reduced, the absorption spectrum is redshifted and the light absorption boundary is widened obviously. Conclusion The g-C3N₄ doping can form Z-type heterojunction, which can improve the efficiency of electron-hole separation and enhance the responsive performance under visible light. This study is of reference significance to provide diversified selection of antibacterial and bacteriostatic self-cleaning materials for clinical dental restoration.