吉林大学学报(医学版) ›› 2025, Vol. 51 ›› Issue (6): 1571-1583.doi: 10.13481/j.1671-587X.20250613

• 基础研究 • 上一篇    

新型可见光活化的钒硅共掺杂TiO2涂层的合成及其抗菌性评价

陈铎1,2,段佩佩3,亢雪萍4,陈诗曼1,2,何佳玥1,2,刘钰昕1,2,李跞鑫1,2,沈玉凤5(),周政1()   

  1. 1.石河子大学第一附属医院兵团口腔医院修复科,新疆 石河子 832000
    2.石河子大学医学院,新疆 石河子 832000
    3.武汉大学口腔医院修复科,湖北 武汉 430079
    4.西安交通大学口腔医院正畸科,陕西 西安 710004
    5.石河子大学第一附属医院兵团口腔医院正畸科,新疆 石河子 832000
  • 收稿日期:2025-01-12 接受日期:2025-02-17 出版日期:2025-11-28 发布日期:2025-12-15
  • 通讯作者: 沈玉凤,周政 E-mail:shenyf1016@163.com;shzuzzheng0526@163.com
  • 作者简介:陈 铎(1999-),男,山西省长治市人,在读硕士研究生,主要从事口腔生物材料方面的研究。
  • 基金资助:
    兵团科技局指导性科技计划项目(2023ZD062);新疆维吾尔自治区卫健委“天山英才”医药卫生高层次人才培养计划中青年骨干项目(CZ001224);兵团党委组织部兵团英才支持计划青年项目(CZ001247);西安交通大学口腔医院陕西省牙颌疾病临床医学研究中心开放课题项目(2021YHJB10);石河子大学自主资助支持校级科研项目(ZZZC202185)

Synthesis of novel visible-light-activated vanadium and silicon co-doped TiO2 coating and its antibacterial property evaluation

Duo CHEN1,2,Peipei DUAN3,Xueping KANG4,Shiman CHEN1,2,Jiayue HE1,2,Yuxin LIU1,2,Luoxin LI1,2,Yufeng SHEN5(),Zheng ZHOU1()   

  1. 1.Department of Prosthodontics,First Affiliated Hospital,Corps Stomatology Hospital,Shihezi University,Shihezi 832000,China
    2.School of Medical Sciences,Shihezi University,Shihezi 832000,China
    3.Department of Prosthodontics,Stomatology Hospital,Wuhan University,Wuhan 430079,China
    4.Department of Orthodontics,Stomatology Hospital,Xi’an Jiaotong University,Xi’an 710004,China
    5.Department of Orthodontics,First Affiliated Hospital,Corps Stomatology Hospital,Shihezi University,Shihezi 832000,China
  • Received:2025-01-12 Accepted:2025-02-17 Online:2025-11-28 Published:2025-12-15
  • Contact: Yufeng SHEN,Zheng ZHOU E-mail:shenyf1016@163.com;shzuzzheng0526@163.com

摘要:

目的 探讨钛表面电化学处理形成钒(V)和硅(Si)共掺杂TiO2涂层(V-Si TiO2)的最佳掺杂浓度,并评估其在可见光照射下的抗菌作用,阐明其可见光响应机制。 方法 将医用纯钛片采用微弧氧化后进行高温煅烧,通过调整电解液中V和Si比例制备不同掺杂浓度的V-Si TiO2涂层,实验分为1V∶10Si(V5Si50)组、2V∶10Si(V10Si50)组和3V∶10Si(V15Si50)组,另设对照组(仅包含细胞培养基),结合表面形态表现、离子释放、光催化能力及生物相容性等评估筛选出最佳掺杂浓度,细胞计数试剂盒8(CCK-8)检测各组细胞增殖活性和细胞存活率。通过扫描电子显微镜(SEM)、 原子力显微镜(AFM)、 数字涡流涂层测厚仪、 X射线衍射(XRD)、 X射线光电子能谱(XPS)和紫外-可见光吸收光谱(UV-vis)对优化涂层进行表征分析比较,实验分为PT组(空白对照)、PEO组(无元素掺杂)、V10组(V掺杂)、Si50组(Si掺杂)和V10Si50组(2V∶10Si),检测可见光下涂层材料降解亚甲基蓝(MB)的能力及活性氧(ROS)生成情况。抗菌实验选用金黄色葡萄球菌(S.aureus)和大肠杆菌(E.coli),分别对各组涂层样品进行可见光照2 h和黑暗处理2 h后记录各组平板菌落数,2',7'-二氯荧光黄双乙酸盐(DCFH-DA)ROS探针检测ROS水平,ROS清除实验选用最佳掺杂浓度V10Si50组。将2种细菌分为PT组、N-乙酰半胱氨酸(NAC)组、V10Si50组和NAC+V10Si50组,可见光照射2 h后记录各组平板菌落数。 结果 电解质溶液中V浓度0.01 mol·L-1和Si浓度0.05 mol·L-1为V-Si TiO2涂层的最佳掺杂浓度。SEM观察,与V5Si50组和V15Si50组比较,V10Si50组涂层材料表面孔径明显减小(P<0.05),涂层厚度明显增加(P<0.05),其晶体结构主要为锐钛矿型,且可见光催化9 h后V10Si50组涂层材料MB降解率明显升高(P<0.05)。与对照组比较,细胞培养1、2和4 d时V10Si50组细胞增殖活性和细胞存活率均明显升高(P<0.05);细胞培养2和4 d时,V5Si50组和V15Si50组细胞增殖活性和细胞存活率均明显降低(P<0.05)。与PT、PEO和Si50组比较,经过可见光照射2 h后V10组和V10Si50组2种细菌菌落数均明显降低(P<0.05)。与PT组和PEO组比较,光照2 h后V10Si50组2种细菌中ROS水平明显升高(P<0.05)。与V10Si50组比较,NAC+V10Si50组2种细菌菌落数明显增加(P<0.05)。 结论 筛选出合理负载化的V-Si TiO2涂层材料(V10Si50),其可以保持良好生物活性且在可见光照射下显著增强抗菌效果。

关键词: 钛植入物, 抗菌性涂层, 光动力, 活性氧, 钒,

Abstract:

Objective To discuss the optimal doping concentration of vanadium (V) and silicon (Si) co-doped TiO? coating (V-Si TiO?) formed on titanium surface by electrochemical treatment, to evaluate its antibacterial effect under visible light irradiation, and to clarify its visible light response mechanism. Methods The medical pure titanium sheets were subjected to micro-arc oxidation followed by high-temperature calcination, and V-Si TiO2 coatings with different doping concentrations were prepared by adjusting the ratio of V to Si in the electrolyte. The experiment was divided into 1V∶10Si (V5Si50) group, 2V∶10Si (V10Si50) group, and 3V∶10Si (V15Si50) group; control group was set up(contains only bacterial culture medium). The optimal doping concentration was screened based on comprehensive evaluation of surface morphology, ion release, photocatalytic ability, and biocompatibility; cell counting kit-8(CCK-8) method was used to detect the proliferation activities and the survival rates of the cells in various group. Subsequently, the optimized coating was characterized and compared by scanning electron microscope (SEM), atomic force microscopy (AFM), digital eddy current coating thickness gauge, X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), and ultraviolet-visible absorption spectroscopy (UV-vis). The experiment was divided into PT group (blank control), PEO group (no element doping), V10 group (V doping), Si50 group (Si doping), and V10Si50 group (2V∶10Si). The ability of the coating materials to degrade methylene blue (MB) and generation of reactive oxygen species (ROS) under visible light were detected. For antibacterial experiments, Staphylococcus aureusS.aureus) and Escherichia coliE.coli) were used. The colony counts on plates in various groups were recorded after visible light irradiation for 2 h and dark treatment for 2 h, respectively. The ROS levels were detected using 2',7'-dichlorofluorescein diacetate (DCFH-DA) ROS probe. ROS scavenging experiment was performed using the optimal doping concentration V10Si50 group, and the two kinds of bacteria were divided into blank control group, N-acetylcysteine (NAC) group, V10Si50 group, and NAC+V10Si50 group. The colony counts on plates in various groups were recorded after visible light irradiation for 2 h. Results The V concentration of 0.01 mol·L?1 and Si concentration of 0.05 mol·L?1 in the electrolyte solution were the optimal doping concentrations for the V-Si TiO? coating. The SEM observation results showed that compared with V5Si50 group and V15Si50 group, the surface pore size of the coating material in V10Si50 group was significantly decreased (P<0.05), and the coating thickness was significantly increased (P<0.05); its crystal structure was mainly anatase type, and the MB degradation rate of the coating material in V10Si50 group after 9 h of visible light catalysis was significantly increased (P<0.05). Compared with control group, the cell proliferation activity and cell survival rate in V10Si50 group were significantly increased at 1, 2, and 4 d of cell culture (P<0.05); at 2 and 4 d of cell culture, the cell proliferation activity and cell survival rate in V5Si50 group and V15Si50 group were significantly decreased (P<0.05). Compared with PT, PEO, and Si50 groups, the colony counts of two kinds of the bacteria in V10 group and V10Si50 group after visible light irradiation for 2 h were significantly decreased (P<0.05). Compared with PT group and PEO group, the ROS levels in two kinds of the bacteria in V10Si50 group after 2 h of irradiation were significantly increased (P<0.05). Compared with V10Si50 group, the colony counts of two kinds of the bacteria in NAC+V10Si50 group were significantly increased (P<0.05). Conclusion A reasonably loaded V-Si TiO? coating material (V10Si50) was screened out, which maintained good biological activity and significantly enhanced the antibacterial effect under visible light irradiation.

Key words: Titanium implant, Antibacterial coating, Photodynamic, Reactive oxygen species, Vanadium, Silicon

中图分类号: 

  • R783.1