Fe_(3)O_(4)基类Fenton催化剂的改性及应用研究进展

Progress in modification and application of Fe_(3)O_(4)-based Fenton-like catalysts

Fe_(3)O_(4)作为尖晶石型非均相类Fenton催化材料,具有绿色无毒、价廉易得、催化活性较高等优点,但纯相Fe_(3)O_(4)催化剂存在H_(2)O_(2)利用率低、适用pH范围窄、活性位点少以及难以回收等问题,影响其实际应用。通过改性Fe_(3)O_(4)或优化反应体系使其具有更高的催化活性是当今国内外学者的研究重点。简述了Fe_(3)O_(4)的理化特性以及类Fenton催化机理,分析了限制Fe_(3)O_(4)催化活性的主要因素,并在此基础上总结了形貌调控、元素掺杂、与载体复合等改性方法在提升Fe_(3)O_(4)催化活性方面的研究进展以及Fenton与其他氧化技术协同提升Fe_(3)O_(4)基催化剂催化活性的机理和应用现状。总结历年来研究成果可知,催化剂自身调控策略以及Fenton体系协同优化均对Fe_(3)O_(4)催化活性提升具有显著作用,但未来仍需在催化剂稳定性、催化机理以及提升类Fenton体系中H_(2)O_(2)利用效率方面进行进一步探索。

As a spinel heterogeneous Fenton-like catalytic material,Fe_(3)O_(4) has the advantages of green,non-toxic,cheap,and high catalytic activity.However,there are still some drawbacks to affect the application of pure phase Fe_(3)O_(4) such as low H_(2)O_(2) utilization rate,narrow range of suitable pH,less active sites and poor recovery.Modification of Fe_(3)O_(4) and optimization of the reaction system are the focus of research to promote catalytic activity.In this paper,the physicochemical properties and Fenton-like catalytic mechanism of Fe_(3)O_(4) were briefly reviewed.The main limit⁃ing factors of Fe_(3)O_(4) catalytic activity were analyzed.And on this basis,the research progress of modification methods such as morphology regulation,element doping and recombination with support to improve the catalytic activity of Fe_(3)O_(4) was summarized.And the mechanism and application of Fe_(3)O_(4)-based Fenton-like catalysts in the collaborative system of other oxidation technologies and Fenton-like technologies were discussed.Based on previous researches,the regulation strategy of catalyst and the collaborative optimization of Fenton system played a significant role in im⁃proving the catalytic activity of Fe_(3)O_(4).But further exploration was still needed in terms of catalyst stability,catalytic mechanism,and improving the utilization efficiency of H2O2 in Fenton-like systems.