银/二氧化钛可见光催化自清洁织物的制备及其性能

为制备基于可见光光催化降解机制的自清洁织物，吡咯(Py)为单体，以硝酸银为银源，通过化学氧化聚合在商业化的纳米二氧化钛(TiO2 )表面形成聚吡咯掺杂银包覆层(PPy-Ag/ TiO2 )，然后高温焙烧去除PPy，获得可见光响应催化剂银/ 二氧化钛(Ag/ TiO2 )。通过共分散溶液用浸渍涂覆法将其涂覆到聚丙烯腈(PAN)纤维上，经加捻、合股织制成织物。借助扫描电子显微镜、红外光谱分析仪、热重分析仪、紫外可见分光光度计等测试织物的结构和性能。结果表明：Ag/ TiO2 粒子较均匀地负载到PAN 纤维表面，其负载率约为3. 17%；涂覆Ag/ TiO2 的织物对亚甲基蓝、罗丹明B 和红酒在可见光下具有良好的降解作用，表现出良好的自清洁效果；经多次洗涤后，该织物仍保持良好的光催化效果，具有良好的耐洗牢度。

Preparation and performance of self-cleaning fabrics based on Ag/TiO2 photocatalysis

In order to prepare self-cleaning fabrics based on photocatalytic mechanism, Ag/ TiO2 visible light response photocatalyst were prepared by using pyrrole (Py) as monomer and silver nitrate as a silver source, performing chemical oxidation polymerization on the surface of commercial TiO2 to form a silverdoped PPy-Ag/ TiO2, and high temperature calcining to remove PPy. The Ag/ TiO2 visible light response photocatalyst was coated on PAN fiber by co-dispersion and dip-coating, and fabrics were prepared by twisting and plying. The structure and properties of the fabrics were studied by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetry and ultraviolet-visible spectroscopy. The results show that Ag/ TiO2 particles are successfully deposited on the surface of PAN fiber with the load quantity about 3. 17%. More importantly, Ag/ TiO2 coated PAN fabrics have good visible-light catalytic degradation to methylene blue, Rhodamine B and red wine under visible light, respectively. Ag/ TiO2 coated PAN fabric show a significant self-cleaning effect. After washing for multiple times, the Ag/ TiO2 coated PAN fabrics still maintain good self-cleaning effect, showing good washing fastness and durability.