期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 606, 期 -, 页码 898-911出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.06.005
关键词
Perylene diimide; P-n heterojunction; Highly ordered H-type pi-pi stacking; 3D EEMs
资金
- Fundamental Research Funds for the Central Universities [2232020D-20, 2232021G-04]
- National Program on Key Research Project [2016YFC0400504]
- Graduate Student Innovation Fund of Donghua University [GSIF-DH-M-2021003]
- China Postdoctoral Foundation Project [2017M611419]
A novel PDI/CuS P-N heterojunction system was synthesized and showed high photocatalytic activity for pollutant removal. The enhancement of photocatalytic activity was mainly attributed to pi-pi stacking and P-N junction, with improved light absorption properties playing an important role.
Developing photocatalysts that are inexpensive and efficient in degrading pollutants are essential for environmental remediation. Herein, a novel system of perylene diimide (PDI)/CuS p-n heterojunction was synthesized by a two-step self-assembly strategy for removal of tetracycline in waste water. Results showed that PDI/CuS-10% exhibited highest photocatalytic behavior. The apparent rate constants for tetracycline (TC) degradation for the blend 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 pi-pi 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 an important role in providing desired photocatalytic properties. Surprisingly, PDI/CuS could maintain high catalytic activity even after 5 cycles under simulated conditions, indicating that the composite had high potential for practical applications. Owing to high efficiency, low cost and wide application range, the PDI/CuS nanocomposites are promising candidates for environmental remediation. (C) 2021 Elsevier Inc. All rights reserved.
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