School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China.
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150000, People's Republic of China.
Environ Sci Pollut Res Int. 2018 May;25(15):14486-14498. doi: 10.1007/s11356-018-1502-8. Epub 2018 Mar 10.
We have successfully synthesized the composites of two-phase g-CN heterojunction photocatalysts by one-step method. And the reduced graphene oxide/two-phase g-CN heterojunction photocatalyst was fabricated via a facile hydrothermal reduction method. The characterization results indicated that the two-phase g-CN was integrated closely, and the common phenomenon of agglomeration for g-CN was significantly reduced. Moreover, the oxidized graphene was reduced successfully in the composites and the graphene was overlaid on the surface or the interlayers of g-CN heterojunction composite uniformly. In addition, we have carried out the photocatalytic activity experiments by H evolution and rhodamine B removal, tetracycline removal under the visible light irradiation. The results revealed that the composite has improved the separation efficiency a lot than the pure photocatalyst. The photocurrent test demonstrated that the recombination of electrons and holes were efficiently inhibited as well as enhanced the photocatalytic activity. The 0.4% rGO loaded samples, 0.4% rGOCN2, own the best performance. Its rate of H evolution was 15 times as high as that of the pure g-CN.
我们成功地通过一步法合成了两相 g-CN 异质结光催化剂复合材料。并通过简便的水热还原法制备了还原氧化石墨烯/两相 g-CN 异质结光催化剂。表征结果表明，两相 g-CN 紧密结合，g-CN 的团聚现象明显减少。此外，复合材料中氧化石墨烯被成功还原，石墨烯均匀地覆盖在 g-CN 异质结复合材料的表面或层间。此外，我们还进行了 H 2 析出和罗丹明 B 去除、可见光照射下四环素去除的光催化活性实验。结果表明，该复合材料比纯光催化剂大大提高了分离效率。光电流测试表明，电子和空穴的复合得到了有效抑制，同时提高了光催化活性。负载 0.4%rGO 的样品，即 0.4%rGOCN2，性能最佳。其 H 2 析出速率是纯 g-CN 的 15 倍。
