Titania–zeolite Y composites were synthesized by a facile solid-state dispersion method. The synergistic effects of porous zeolite structure and novel photocatalysis properties of titania nanoparticles were exploited. The physical properties of the composites were characterized by scanning electron microscopy, energy-dispersive X-ray, X-ray diffraction, diffuse reflectance spectroscopy, fourier transform infra-red spectroscopy and photoluminescence spectroscopy. Porosity and surface area of the composites were determined from Brunauer–Emmett–Teller studies. The antibacterial effect and the photocatalysis properties of these composites were studied. Composites exhibited higher growth reduction of Escherichia coli and Staphylococcus aureus as compared with the pure forms (P25 titania and zeolite Y). Maximum growth reduction of both types of bacterial cells (gram-positive as well as gram-negative) was observed with 20% titania–zeolite composite. The composite demonstrated 40 and 30% enhancement in the growth reduction of E. coli and S. aureus, respectively, as compared with the pure forms; 10% composite exhibited 50% enhancement in the photocatalysis efficiency of methylene blue dye degradation as compared with P25 titania nanoparticles and led to a complete removal of the dye in the first 60 min of photocatalysis process. Mechanisms for both applications have been proposed in light of the observed results.

中文翻译：

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用于潜在环境应用的二氧化钛基多孔纳米复合材料

二氧化钛-沸石 Y 复合材料是通过一种简便的固态分散法合成的。利用多孔沸石结构和二氧化钛纳米粒子的新型光催化性能的协同效应。通过扫描电子显微镜、能量色散X射线、X射线衍射、漫反射光谱、傅里叶变换红外光谱和光致发光光谱对复合材料的物理性质进行了表征。复合材料的孔隙率和表面积由 Brunauer-Emmett-Teller 研究确定。研究了这些复合材料的抗菌作用和光催化性能。与纯形式（P25 二氧化钛和沸石 Y）相比，复合材料表现出更高的大肠杆菌和金黄色葡萄球菌生长减少。使用 20% 的二氧化钛-沸石复合材料观察到两种类型的细菌细胞（革兰氏阳性和革兰氏阴性）的最大生长减少。与纯形式相比，复合材料在大肠杆菌和金黄色葡萄球菌的生长减少方面分别表现出 40% 和 30% 的增强；与 P25 二氧化钛纳米粒子相比，10% 的复合材料在亚甲蓝染料降解的光催化效率上提高了 50%，并在光催化过程的前 60 分钟内完全去除了染料。根据观察到的结果，已经提出了这两种应用的机制。与纯形式相比；与 P25 二氧化钛纳米粒子相比，10% 的复合材料在亚甲蓝染料降解的光催化效率上提高了 50%，并在光催化过程的前 60 分钟内完全去除了染料。根据观察到的结果，已经提出了这两种应用的机制。与纯形式相比；与 P25 二氧化钛纳米粒子相比，10% 的复合材料在亚甲蓝染料降解的光催化效率上提高了 50%，并在光催化过程的前 60 分钟内完全去除了染料。根据观察到的结果，已经提出了这两种应用的机制。