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首页> 外文期刊>The Journal of the Textile Institute >Self-cleaning wool: effect of noble metals and silica on visible-light-induced functionalities of nano TiO_2 colloid
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Self-cleaning wool: effect of noble metals and silica on visible-light-induced functionalities of nano TiO_2 colloid

机译：自洁羊毛：贵金属和二氧化硅对纳米TiO_2胶体的可见光诱导功能的影响

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摘要

This study intends to enhance the functionality of titanium dioxide (TiO2) nanoparticles applied to wool fabrics under visible light. Herein, TiO2, TiO2/SiO2, TiO2/Metal, and TiO2/Metal/SiO2 nanocomposite sols were synthesized and applied to wool fabrics through a low-temperature sol-gel method. The impacts of three types of noble metals, namely gold (Au), platinum (Pt), and silver (Ag), on the photoefficiency of TiO2 and TiO2/SiO2 under visible light were studied. Different molar ratios of Metal toTiO(2) (0.01, 0.1, 0.5, and 1%) were employed in synthesizing the sols. Photocatalytic efficiency of fabrics was analyzed through monitoring the removal of red wine stain and degradation of methylene blue under simulated sunlight and visible light, respectively. Also, the antimicrobial activity against Escherichia coli (E. coli) bacterium and the mechanical properties of fabrics were investigated. Through applying binary and ternary nanocomposite sols to fabrics, an enhanced visible-light-induced self-cleaning property was imparted to wool fabrics. It was concluded that the presence of silica and optimized amount of noble metals had a synergistic impact on boosting the photocatalytic and antimicrobial activities of coated samples. The fabrics were further characterized using attenuated total reflectance, energy-dispersive X-ray spectrometry, and scanning electron microscopy images.
机译：这项研究旨在增强可见光下应用于羊毛织物的二氧化钛（TiO2）纳米颗粒的功能。在此，合成了TiO 2，TiO 2 / SiO 2，TiO 2 /金属和TiO 2 /金属/ SiO 2纳米复合溶胶，并通过低温溶胶-凝胶法将其应用于羊毛织物。研究了可见光下金（Au），铂（Pt）和银（Ag）三种贵金属对TiO2和TiO2 / SiO2光效率的影响。金属与TiO（2）的摩尔比（0.01、0.1、0.5和1％）用于合成溶胶。通过在模拟阳光和可见光下分别监测红酒渍的去除和亚甲基蓝的降解，分析了织物的光催化效率。另外，还研究了对大肠杆菌（E. coli）细菌的抗菌活性和织物的机械性能。通过将二元和三元纳米复合溶胶应用于织物，羊毛织物具有增强的可见光诱导的自洁性能。结论是二氧化硅的存在和优化量的贵金属对提高涂层样品的光催化和抗菌活性具有协同作用。使用衰减的全反射率，能量色散X射线光谱法和扫描电子显微镜图像进一步表征织物。

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