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用分子自组装的方法在玻璃衬底上分别制备了TiO2纳米颗粒层和SiO2-TiO2复合纳米颗粒阵列结构.其中,SiO2纳米颗粒层用旋涂法制备,得到密排阵列结构,而TiO2纳米颗粒层则用浸渍提拉法制备.文章分析了TiO2纳米颗粒层和SiO2-TiO2复合纳米颗粒阵列结构的理论粗糙度,并通过扫描电子显微镜研究了它们的微观结构,用接触角测试仪测定了其紫外光照前后的水接触角变化,并结合分光光度计分析和研究了其光催化降解有机物的能力.实验结果表明:在紫外光照射后,TiO2纳米颗粒层和SiO2-TiO2双层颗粒阵列结构均呈现出超亲水性,其接触角接近0°,但避光保存一段时间后,它们的接触角都有所增大,直至到一个较稳定的接触角;SiO2-TiO2复合纳米颗粒阵列结构的亲水性优于纳米TiO2单层;SiO2-TiO2双层颗粒的光催化降解有机物的能力也明显优于TiO2颗粒单层.
The molecular structure of TiO2nanoparticles and SiO2-TiO2nanocomposites were prepared on glass substrates by molecular self-assembly method, respectively.The SiO2nanoparticles were prepared by spin-coating method, Layer was prepared by dip-pull method.The theoretical roughness of the array structure of TiO2 nanoparticles and SiO2-TiO2 composite nanoparticles was analyzed and their microstructures were studied by scanning electron microscopy The changes of the contact angle of water before and after UV irradiation were analyzed and the photocatalytic ability of photocatalytic degradation of organic compounds was analyzed.Experimental results show that the structure of TiO2 nanoparticles layer and SiO2-TiO2 bilayer particles after ultraviolet irradiation Showing a super-hydrophilic, the contact angle close to 0 °, but after a period of dark preservation, their contact angle has increased until it reaches a more stable contact angle; SiO2-TiO2 composite nanoparticle array structure Hydrophilicity is better than nano-TiO2 single layer; SiO2-TiO2 double-layer particles photocatalytic degradation of organic matter was also significantly better than the single layer of TiO2 particles.