Abstract Photocatalytic microcompartments have attracted increasing interests in the field of photocatalytic degradation. This work focused on the construction and characterization of a novel photocatalytic microsystem comprising polydopamine-modified TiO2 nanoparticles (NPs) dispersed in clay-based colloidosomes, utilizing partially hydrophobic montmorillonite particles as building blocks for colloidosome membrane assembly. Assessment of photocatalytic activity was performed by photocatalytic degradation of methylene blue and rhodamine B, with the small molecule dyes decomposing within the compartmentalized microsystems. Encapsulation of TiO2 NPs within the clay colloidosomes enhanced the efficiency of photocatalytic degradation. The results showed a selective degradation of methylene blue in the presence of rhodamine B, with associated λMB/λRhB of 2.04. The present study indicates that photocatalytic semiconductor NPs encapsulated in clay colloidosomes form a promising microsystem with great potential for application in environmental remediation.

中文翻译：

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基于纳米TiO 2 粘土胶体的光催化微反应器

摘要 光催化微室在光催化降解领域引起了越来越多的关注。这项工作的重点是构建和表征一种新型光催化微系统，该微系统包含分散在粘土基胶体中的聚多巴胺修饰的 TiO2 纳米粒子 (NPs)，利用部分疏水的蒙脱石颗粒作为胶体膜组装的构件。光催化活性的评估是通过亚甲蓝和罗丹明 B 的光催化降解进行的，小分子染料在分隔微系统内分解。TiO2 NPs 在粘土胶体中的封装提高了光催化降解的效率。结果表明，在罗丹明 B 存在下，亚甲蓝选择性降解，相关的 λMB/λRhB 为 2.04。目前的研究表明，封装在粘土胶体中的光催化半导体纳米颗粒形成了一个很有前景的微系统，在环境修复中具有巨大的应用潜力。