Constructing Nano-Heterostructure with Dual-Site to Boost H 2 O 2 Activation and Regulate the Transformation of Free Radicals.

A major issue with Fenton-like reaction is the excessive consumption of H 2 O 2 caused by the sluggish regeneration rate of low-valent metal, and how to improve the activation efficiency of H 2 O 2 has become a key in current research. Herein, a nano-heterostructure catalyst (1.0-MnCu/C) based on nano-interface engineering is constructed by supporting Cu and MnO on carbon skeleton, and its kinetic rate for the degradation of tetracycline hydrochloride is 0.0436 min -1 , which is 2.9 times higher than that of Cu/C system (0.0151 min -1 ). The enhancement of removal rate results from the introduced Mn species can aggregate and transfer electrons to Cu sites through the electron bridge Mn-N/O-Cu, thus preventing Cu 2+ from oxidizing H 2 O 2 to form O 2 •- , and facilitating the reduction of Cu 2+ and generating more reactive oxygen species ( 1 O 2 and ·OH) with stronger oxidation ability, resulting in H 2 O 2 utilization efficiency is 1.9 times as much as that of Cu/C. Additionally, the good and stable practical application capacity in different bodies demonstrates that it has great potential for practical environmental remediation.