Enhanced heterogeneous Electro-Fenton catalysis using CNT/MoS2/FeCo-LDH cathode membranes for efficient phenol removal from wastewater
Peng Zhang, Xin Meng, Xiaomin Luo, Jian Wang, Jianyan Feng, Yun Ma, Ka Li, Ying Liu, Lufeng Ji
Abstract
Herein, we innovatively crafted a novel CNT/MoS2/FeCo-LDH cathode membrane using a facile vacuum filtration method. Benefiting from the unique heterostructure between FeCo-LDH and MoS2, the prepared CNT/MoS2/FeCo-LDH cathode membranes catalyzed the production of high-concentration H2O2 (7.59 mg/L) at a low current density of 1.50 mA/cm2. The peak degradation efficiency of phenol (98.80%) was reached in only 60 minutes. Under optimized operating conditions, the phenol removal rate of the CNT/MoS2/FeCo-LDH cathode membrane remained above 80.00% within a wide pH range (3.0-9.0), demonstrating excellent adaptability. The synergistic incorporation of Mo, Fe, and Co ions facilitated additional chemical reaction pathways for Fenton-like reactions, thereby significantly enhancing hydrogen peroxide production. Notably, our approach exhibited moderate total organic carbon degradation efficiency, even for the actual pretreatment of coking wastewater, presenting a promising strategy for addressing recalcitrant industrial wastewater.