Abstract：
In this study, a highly efficient CoFe2O4-anchored g-C3N4 nanocomposite with Z-scheme photocatalyst was developed by facile calcination and hydrothermal technique. To evaluate the crystalline structure, sample surface morphology, elemental compositions, and charge conductivity of the as-synthesized catalysts by various characterization techniques. The high interfacial contact of CoFe2O4 nanoparticles (NPs) with g-C3N4 nanosheets reduced the optical bandgap from 2.67 to 2.5 eV, which improved the charge carrier separation and transfer. The photo-degradation of methylene blue (MB) and rhodamine B (Rh B) aqueous pollutant suspension under visible-light influence was used to investigate the photocatalytic degradation activity of the efficient CoFe2O4/g-C3N4 composite catalyst. The heterostructured spinel CoFe2O4 anchored g-C3N4 photocatalysts (PCs) with Z-scheme show better photocatalytic degradation performance for both organic dyes. Meanwhile, the efficiency of aqueous MB and Rh B degradation in 120 and 100 min under visible-light could be up to 91.1% and 73.7%, which is greater than pristine g-C3N4 and CoFe2O4 catalysts. The recycling stability test showed no significant changes in the photo-degradation activity after four repeated cycles. Thus, this work provides an efficient tactic for the construction of highly efficient magnetic PCs for the removal of hazardous pollutants in the aquatic environment.
摘要：
在这项研究中,通过简单的煅烧和水热技术，开发了一种具有Z方案光催化剂的高效CoFe2O4锚定g-C3N4纳米复合材料。为了评估晶体结构，样品表面形貌，元素成分，通过各种表征技术对合成催化剂的电荷电导率和电荷电导率。CoFe2O4纳米颗粒（NPs）与g-C3N4纳米片的高界面接触将光学带隙从2.67降低到2.5eV，提高了载流子的分离和转移。以亚甲基蓝（MB）和罗丹明B（RhB）水性污染物悬浮液在可见光影响下的光降解为研究有效的CoFe2O4/g-C3N4复合催化剂的光催化降解活性。具有Z方案的异质结构尖晶石CoFe2O4锚定g-C3N4光催化剂（PC）对两种有机染料均显示出更好的光催化降解性能。同时,在可见光下120分钟和100分钟内，水性MB和RhB的降解效率可达91.1%和73.7%，其大于原始g-C3N4和CoFe2O4催化剂。循环稳定性测试显示在四个重复循环后光降解活性没有显著变化。因此，这项工作为构建高效磁性PC以去除水生环境中的有害污染物提供了有效的策略。
