Zhang Caihong, Han Xiaoyu, Wang Fei, Wang Lijuan, Liang Jinsheng
Key Laboratory of Special Functional Materials for Ecological Environment and Information, Hebei University of Technology, Ministry of Education, Tianjin, China.
Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin, China.
Front Chem. 2021 Aug 16;9:736369. doi: 10.3389/fchem.2021.736369. eCollection 2021.
The excellent photo-response of ZnFeO in the visible light region makes it a promising catalyst, whereas some defects like serious particle agglomeration and easy recombination of photo-generated electron-hole pairs hinder its application. In this work, the ZnFeO/sepiolite (ZF-Sep) composites were synthesized using a co-precipitation method. The obtained ZF-Sep composites were characterized by XRD, SEM, TEM, FT-IR, XPS, BET, VSM and DRS. Moreover, the photocatalytic performance was evaluated by the tetracycline hydrochloride removal efficiency under simulated visible light illumination. The results displayed that the ZnFeO with average sizes about 20 nm were highly dispersed on sepiolite nanofibers. All the composites exhibited better photocatalytic performance than pure ZnFeO due to the synergistic effect of the improvement on the agglomeration phenomenon of ZnFeO and the reduction on the recombination rate of photo-generated electrons and holes. The optimum removal efficiency was that of the ZF-Sep-11 composite, which reached 93.6% within 3 h. Besides, the composite exhibited an excellent stability and reusability. Therefore, ZF-Sep composite is a promising catalyst for the treatment of wastewater contained antibiotics.
ZnFeO在可见光区域具有出色的光响应，使其成为一种有前景的催化剂，然而一些缺陷，如严重的颗粒团聚和光生电子 - 空穴对的容易复合，阻碍了其应用。在这项工作中，采用共沉淀法合成了ZnFeO/海泡石（ZF-Sep）复合材料。通过XRD、SEM、TEM、FT-IR、XPS、BET、VSM和DRS对所得的ZF-Sep复合材料进行了表征。此外，通过模拟可见光照射下盐酸四环素的去除效率评估了光催化性能。结果表明，平均尺寸约为20nm的ZnFeO高度分散在海泡石纳米纤维上。由于改善了ZnFeO的团聚现象以及降低了光生电子和空穴的复合率的协同效应，所有复合材料都表现出比纯ZnFeO更好的光催化性能。最佳去除效率是ZF-Sep-11复合材料的，在3小时内达到93.6%。此外，该复合材料表现出优异的稳定性和可重复使用性。因此，ZF-Sep复合材料是一种有前景的用于处理含抗生素废水的催化剂。
