writer：Lingfeng Yan;Wei Wang ;Qiangqiang Zhao,Zhijia Zhu;Baojiang Liu*;Chunyan Hu*
keywords：perylene diimidep-n heterojunctionhighly ordered H-type π–π stacking3D EEMs
source：期刊
specific source：Journal of Colloid and Interface Science
Issue time：2021年
Developing photocatalysts with efficient pollutant degradation properties is essential for environmental purification. Herein, a novel system of perylene diimide (PDI)/CuS p-n heterojunction was synthesized by the two-step self-assembly strategy. Results showed that PDI/CuS-10% exhibited a highest photocatalytic behavior. The apparent rate constants for tetracycline (TC) degradation were 5.27 and 2.68 times higher than that of CuS or PDI, respectively. The enhancement of photocatalytic activity was mainly attributed to the π–π stacking and p-n junction, which can accelerate the separation of the photo-generated h+-e- pairs. Besides, the light absorption of PDI/CuS from 800 to 200 nm was significantly enhanced and the absorption edge even reached the near-infrared region, which also played the important role in the satisfactory photocatalytic properties. Furthermore, LC-MS and 3D EEMs were proposed to explore the possible degradation process of TC. Surprisingly, PDI/CuS could maintain high catalytic activity even after 5 cycles under simulated actual water quality conditions, indicating this composite had excellent application performance. Owing to the characteristics of high efficiency, low cost and wide application range, the PDI/CuS nanocomposites are promising candidates as highly effective environmental remediation.