Abstract
The electronic interactions of bimetals were investigated in the confined membrane environment. In this work, Cu-Mn oxides were loaded on polytetrafluoroethylene (PTFE) membrane surface for nano-confined PMS activation and sulfamethoxazole (SMX) degradation. The CuO@MnO2/PTFE membrane achieved SMX removal with constant of 0.1268 min−1 in PMS system, which was higher than that in traditional advanced oxidation process (0.0949 min−1). The confined Cu and Mn sites enhanced electronic coupling, which promoted the electron rearrangement of metal sites and facilitated PMS adsorption and activation. As a result, SO4•− (48.11%) and •OH (31.78%) played a dominant role in CuO@MnO2/PTFE membrane/PMS system, hence achieving faster removal of SMX. The obtained results help to understand the PMS activation process with confined bimetals, which ultimately promotes the development and application of confined catalysis.
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