Leupold Michael S, Reuschenbach Max, Renner Gerrit, Asghar Anam, Kerpen Klaus, Fischer Lukas, Schmidt Torsten C
Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstr.5, Essen 45141, Germany.
Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstr.2, Essen 45141, Germany.
MethodsX. 2025 Jul 1;15:103478. doi: 10.1016/j.mex.2025.103478. eCollection 2025 Dec.
This study presents the Modular Annular Photocatalytic Membrane Reactor (MAPMR), designed to address key challenges in conventional photocatalytic reactors, such as uniform light distribution, efficient photocatalyst recovery, and a precise control over reaction conditions. The MAPMR features:1)A modular, annular configuration with vertically stacked photocatalyst-immobilized membranes surrounding the light source, ensuring uniform light distribution.2)Continuous separation and recovery of photocatalysts, while providing precise control over parameters such as reaction time, temperature, and light intensity.3)Use of UV-cut filters to block light wavelength below specific thresholds.The reactor was tested with TiO₂-decorated polyethersulfone (PES) membranes (TiO₂-PES) and equipped with selective UV cut-off filters to selectively assess individual micropollutant degradation processes. These filters block wavelengths below 296 nm, 325 nm, and 405 nm, facilitating separate studies of UV- and visible light-driven photocatalysis while preventing direct photolysis. The reactor's modular design facilitates easy membrane replacement, supports diverse operational modes, and integrates in-line and on-line monitoring for real-time analytical insights. Amoxicillin (AMX), a model organic pollutant, was used as the probe compound to evaluate reactor performance with potassium nitrate as a UV cut-off filter (λ < 325 nm) providing precise evaluation of both photocatalytic and photolytic AMX degradation.
本研究介绍了模块化环形光催化膜反应器（MAPMR），其设计旨在应对传统光催化反应器中的关键挑战，如均匀的光分布、高效的光催化剂回收以及对反应条件的精确控制。MAPMR的特点包括：1）模块化环形结构，光源周围垂直堆叠固定有光催化剂的膜，确保光的均匀分布。2）光催化剂的连续分离和回收，同时可精确控制反应时间、温度和光强度等参数。3）使用紫外线截止滤光片来阻挡特定阈值以下的光波长。该反应器使用二氧化钛修饰的聚醚砜（PES）膜（TiO₂ - PES）进行测试，并配备选择性紫外线截止滤光片，以选择性地评估单个微污染物的降解过程。这些滤光片阻挡296nm、325nm和405nm以下的波长，便于分别研究紫外线和可见光驱动的光催化作用，同时防止直接光解。该反应器的模块化设计便于轻松更换膜，支持多种操作模式，并集成在线和在线监测以获得实时分析见解。以阿莫西林（AMX）作为典型有机污染物作为探针化合物，以硝酸钾作为紫外线截止滤光片（λ < 325nm）来评估反应器性能，从而精确评估光催化和光解AMX的降解情况。
