许卫星,秦志伟,张霞.牙科修复用BiOIO3/g-C3N4复合纳米光催化剂的制备与表征[J].口腔材料器械杂志,2021,30(3):144-148.
牙科修复用BiOIO3/g-C3N4复合纳米光催化剂的制备与表征
Preparation and characterization of BiOIO3/g-C3N4 composite nano-photocatalyst for dental restoration
投稿时间：2021-03-16  修订日期：2021-06-24
DOI：10.11752/j.kqcl.2021.03.04
中文关键词:  光催化剂  BiOIO3/g-C3N4  制备  表征
英文关键词:Photocatalyst  BiOIO3/g-C3N4  Preparation  Characterization
基金项目:上海市黄浦区科委科技项目基金（编号：HKM201833）；黄浦区卫健委重点研究发展专科项目基金（编号：HWZFK201810）
作者单位E-mail
许卫星 上海市黄浦区第二牙病防治所, 上海 200020 smlstar868@163.com 
秦志伟 上海电力大学能源与机械工程学院, 上海 200090  
张霞 上海电力大学能源与机械工程学院, 上海 200090  
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中文摘要:
      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、分子组成和理化特性等进行表征。结果 在5mol/L的NaOH溶液条件下制备出BiOIO3/g-C3N4（BC-5），其（010）峰和（040）峰的强度最弱，（121）峰的强度最强，形貌呈方形块状，出现圆角形状，尺寸在100~200 nm范围，厚度约为60 nm。其富含异质结构，禁带宽度降低，吸收光谱红移，光吸收边界有明显拓宽。结论 g-C3N4掺杂形成了Z型异质结构，提高了电子-空穴分离效率，提升了可见光响应性能。该结果为新型牙科修复功能性光催化材料的选择提供了一定的理论依据。
英文摘要:
      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.
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