Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China.
Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Innovation Center for Textile Science and Technology, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China; Department of Textile, Garment & Design, Changshu Institute of Technology, Suzhou 215500, China.
J Colloid Interface Sci. 2022 Jan 15;606(Pt 1):898-911. doi: 10.1016/j.jcis.2021.06.005. Epub 2021 Jun 4.
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 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 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.
开发廉价且高效的光催化剂来降解污染物对于环境修复至关重要。在此，通过两步自组装策略合成了一种新型的苝二酰亚胺（PDI）/CuS p-n 异质结体系，用于去除废水中的四环素。结果表明，PDI/CuS-10%表现出最高的光催化性能。该共混物降解四环素（TC）的表观速率常数分别比 CuS 和 PDI 高 5.27 倍和 2.68 倍。光催化活性的增强主要归因于π-π堆积和 p-n 结，这可以加速光生 h-e 对的分离。此外，PDI/CuS 的光吸收从 800nm 显著增强到 200nm，吸收边缘甚至达到近红外区域，这也对提供所需的光催化性能起到了重要作用。令人惊讶的是，PDI/CuS 在模拟条件下经过 5 次循环后仍能保持高催化活性，表明该复合材料具有很高的实际应用潜力。由于其高效、低成本和广泛的应用范围，PDI/CuS 纳米复合材料是环境修复的有前途的候选材料。
