In this study, functional cotton fabrics were prepared through applying nano titanium dioxide as photocatalyst and using green walnut shell dye as both natural dye for coloration and agent capable of modifying TiO₂ nanoparticles. Natural dye extract of green walnut shells was used as photo sensitizer to fabricate titanium dioxide nanoparticles. Surface modification and coloration of cotton fabrics were performed by adding modified titanium dioxide nanoparticles in exhaustion bath. Produced cotton fabrics were characterized by field emission scanning electron microscope, energy-dispersive X-ray spectroscopy and X-ray diffraction. Results indicated that all properties such as self-cleaning, antibacterial and antifungal of treated cotton fabric were superior with modified titanium dioxide compared to treated sample with TiO₂ alone. Moreover, the photocatalytic activity of titanium dioxide has no negative effect on fabric color.

中文翻译：

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纳米二氧化钛与绿色核桃壳染料对棉织物的优异自洁和抗菌性能

在这项研究中，功能性棉织物是通过使用纳米二氧化钛作为光催化剂，并使用绿色胡桃壳染料作为天然着色剂和能够修饰TiO _2的试剂制备的纳米粒子。将绿色核桃壳的天然染料提取物用作光敏剂，以制备二氧化钛纳米粒子。通过在排气浴中添加改性的二氧化钛纳米颗粒进行棉织物的表面改性和着色。通过场发射扫描电子显微镜，能量色散X射线光谱和X射线衍射对棉织物进行表征。结果表明，与仅用TiO ₂进行处理的样品相比，改性的二氧化钛对处理后的棉织物的所有性能（如自洁性，抗菌性和抗真菌性）都优异。而且，二氧化钛的光催化活性对织物颜色没有负面影响。