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为提高钨酸铋（BWO）的光催化活性与抗菌性能，本文设计并制备了银掺杂钨酸铋及其与聚丙烯腈（PAN）复合的静电纺丝Ag-BWO/PAN纳米抗菌纤维膜，并采用扫描电镜、X射线光电子能谱仪、紫外-可见光漫反射光谱、光致发光光谱以及抗菌测试等对纳米纤维膜的成分形貌、催化活性和抗菌性能进行了表征与分析。研究结果表明，相比于BWO,Ag-BWO的分散性更好，颗粒尺寸约为100 nm。Ag-BWO的<1 1 3>方向的晶面间距增大，这主要是因为掺杂银在点阵间隙中以固溶体的形式存在而造成点阵畸变。随银掺杂量的增加，Ag-BWO颗粒在450～500 nm波段范围内的激发波长产生红移，禁带宽度由2.61 eV减少到2.53 eV，使得光生电子和光生空穴得以被更低的可见光能量激发，提高了BWO颗粒光催化性能。此外，从光催化降解曲线中可以看出随着银掺杂量的增加，Ag-BWO/PAN纳米纤维膜在2.5 h就可以达到降解效率90%以上，抗菌率最高可达99.99%，具备优异的催化与抗菌性能。
Abstract：In order to improve the photocatalytic activity and antimicrobial performance of bismuth tungstate(BWO), electrostatically spun Ag-BWO/PAN nanofibrous antimicrobial fibrous membranes composite of silver-doped BWO and polyacrylonitrile(PAN) were designed and prepared in this paper. The compositions, morphologies, catalytic activity and antibacterial performance of the nanofibrous membranes were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflection spectroscopy, photoluminescence spectroscopy, and antimicrobial experiments. The results show that Ag-BWO is better dispersed than BWO, with a particle size of about 100 nm. The crystal spacing in the <1 1 3> direction of BWO increases after Ag doping, and Ag doping in the dot matrix gap causes dot matrix distortion in the form of solid solution. With an increase of doped Ag, the excitation wavelength of Ag-BWO particles in the range of 450～500 nm band is red-shifted, and the forbidden bandwidth is reduced from 2.61 to 2.53 eV. Hence, the photogenerated electrons and holes can be activated by lower visible light energy, which improves the photocatalytic performance of BWO particles. In addition, the photocatalytic degradation curves show that with an increase of doped Ag, the Ag-BWO/PAN nanofiber membrane can reach a degradation efficiency of more than 90% and an antibacterial rate of up to 99.99% in 2.5 h. Therefore, the membrane exhibits excellent catalytic and antimicrobial properties.
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基本信息:
中图分类号:TQ340.64;O643.36;O644.1
引用信息:
[1]杨居一,周镜茹,薛烽,等.静电纺丝Ag-BWO/PAN纳米抗菌纤维膜的制备及性能研究[J].现代交通与冶金材料,2025,5(06):19-25.
基金信息:
国家自然科学基金资助项目(51771054)
2025-08-11
2025
2025-10-27
2025-12-16
2025
1
2025-11-15
2025-11-15