Li Qian, Jiang Xiaoyu, Lian Yongfu
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
Nanomaterials (Basel). 2021 May 13;11(5):1276. doi: 10.3390/nano11051276.
The MnFeO/BGA (boron-doped graphene aerogel) composite was prepared by hydrothermal treatment of MnFeO particles, boric acid, and graphene oxide. When applied as a photo-Fenton catalyst for the degradation of rhodamine B, the MnFeO/BGA composite yielded a degradation efficiency much higher than the sum of those of individual MnFeO and BGA under identical experimental conditions, indicating a strong synergetic effect established between MnFeO and BGA. The catalytic degradation of rhodamine B was proved to follow pseudo first-order kinetics, and the apparent reaction rate constant on the MnFeO/BGA composite was calculated to be three- and seven-fold that on BGA and MnFeO, respectively. Moreover, the MnFeO/BGA composite also demonstrated good reusability and could be reused for four cycles without obvious loss of photocatalytic activity.
通过对MnFeO颗粒、硼酸和氧化石墨烯进行水热处理制备了MnFeO/BGA（硼掺杂石墨烯气凝胶）复合材料。当用作光芬顿催化剂用于罗丹明B的降解时，在相同实验条件下，MnFeO/BGA复合材料产生的降解效率远高于单独的MnFeO和BGA的降解效率之和，这表明MnFeO和BGA之间建立了强烈的协同效应。罗丹明B的催化降解被证明遵循准一级动力学，计算得出MnFeO/BGA复合材料上的表观反应速率常数分别是BGA和MnFeO上的表观反应速率常数的三倍和七倍。此外，MnFeO/BGA复合材料还表现出良好的可重复使用性，可重复使用四个循环而光催化活性无明显损失。
