Abstract

TiO₂-SiO₂ mixed oxides in ratios between 20:80 and 80:20 have been prepared using a sol-gel method. To make full use of catalysis, optimization conditions such as SiO₂ content, solution pH, and catalyst loading were investigated. The photocatalysts were characterized spectroscopically as nanoparticles of small crystallite size. Their efficiency for UV-A light induced photocatalytic degradation of amoxicillin and ofloxacin was evaluated, with 80% TiO₂-20% SiO₂ being the most active, resulting in complete mineralization and non-toxicity. The catalyst shows some recyclability up to the seventh cycle.

中文翻译：

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TiO2-SiO2复合材料光催化降解阿莫西林和氧氟沙星

摘要

使用溶胶-凝胶法制备了比例在 20:80 和 80:20 之间的TiO ₂ -SiO ₂混合氧化物。为充分发挥催化作用，对SiO ₂含量、溶液pH值和催化剂负载量等优化条件进行了研究。光催化剂在光谱上被表征为小晶粒尺寸的纳米颗粒。评估了它们对 UV-A 光诱导的阿莫西林和氧氟沙星光催化降解的效率，其中 80% TiO ₂ -20% SiO ₂是最活跃的，导致完全矿化和无毒。直到第七次循环，催化剂显示出一定的可回收性。