物理化学学报 >> 2024, Vol. 40 >> Issue (12): 2403005.doi: 10.3866/PKU.WHXB202403005

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一种新型Carbon Quantum Dots/CdS/Ta3N5 S型异质结纤维光催化材料用于高效降解抗生素

李世杰1,2,*(), 戎珂1, 王晓琴1, 申楚琦1, 杨方3, 张青红2,*()   

  1. 1 浙江海洋大学, 海洋科学与技术学院, 国家海洋设施养殖工程技术研究中心, 浙江省海产品健康危害因素关键技术研究重点实验室, 浙江 舟山 316022
    2 东华大学, 纤维材料改性国家重点实验室(东华大学), 上海 201620
    3 上海工程技术大学, 机械与汽车工程学院, 上海 201620
  • 收稿日期:2024-03-07 修回日期:2024-04-18 录用日期:2024-04-19 发布日期:2024-04-23
  • 通讯作者: Email: lishijie@zjou.edu.cn (李世杰)zhangqh@dhu.edu.cn (张青红)
  • 基金资助:
    纤维材料改性国家重点实验室资助课题(KF2321); 浙江省自然科学基金(LY20E080014); 舟山科技项目(2022C41011)

Design of Carbon Quantum Dots/CdS/Ta3N5 S-scheme Heterojunction Nanofibers for Efficient Photocatalytic Antibiotic Removal

Shijie Li1,2,*(), Ke Rong1, Xiaoqin Wang1, Chuqi Shen1, Fang Yang3, Qinghong Zhang2,*()   

  1. 1 Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, National Engineering Research Center for Marine Aquaculture, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang Province, China
    2 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
    3 School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2024-03-07 Revised:2024-04-18 Accepted:2024-04-19 Published:2024-04-23
  • Contact: Email: lishijie@zjou.edu.cn (Shijie Li)zhangqh@dhu.edu.cn (Qinghong Zhang)
  • Supported by:
    the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(KF2321); the Natural Science Foundation of Zhejiang Province of China(LY20E080014); the Science and Technology Project of Zhoushan of China(2022C41011)

摘要:

近年来随着工业化的深入发展,全球环境污染日益加重,尤其是水体中的抗生素污染, 亟需重点关注并采取科学、有效方法予以解决。光催化技术是一种非常有前景的水体治理技术,为解决水体抗生素污染提供了重要途径。该技术实现大规模应用的关键在于开发出高效且稳定的光催化材料。现有的光催化材料的性能主要受制于其弱的太阳能利用率,快速复合的光生载流子以及氧化还原能力弱等问题。研究发现科学设计和构筑碳量子调控S型异质结材料可以有效克服以上问题。相比于单一的S型异质结,该新型异质结体系整合了两者的优势,具有巨大的应用前景。因此,开发新型碳量子调控S型异质结材料,有望实现对抗生素污染水体的快速治理,进一步促进光催化水体修复技术的发展。在本文研究中,我们成功开发了一种新型的碳量子点调控的S型carbon quantum dots/CdS/Ta3N5异质结纤维用于高效去除左氧氟沙星。其对左氧氟沙星去除速率常数为0.0404 min−1,比Ta3N5,CdS/Ta3N5和CdS分别提高了39.4、2.1和7.2倍。这主要得益于独特1D/0D/0D核壳结构,该异质结构有效促进了碳量子点和S型异质结的协同增效机制。本研究为开发高效Ta3N5基催化体系用于环境治理开辟了一种新的思路。

关键词: 碳量子点, S型异质结, Ta3N5纤维, 协同效应, 光催化

Abstract:

Photocatalytic pollutant removal provides a competitive manner for wastewater purification. The exploration of efficient and durable photocatalysts is significant for this technique. Integrating carbon quantum dots and S-scheme junction into one system represents an effective strategy for achieving the outstanding photocatalytic efficacy. In comparison to S-scheme junction, photocatalysts combining carbon quantum dots and S-scheme junction harness the merits of both, thus holding greater potential. Herein, a multicomponent fibrous photocatalyst of carbon quantum dots/CdS/Ta3N5 that incorporates S-scheme heterojunction and carbon quantum dots is developed for high-efficient destruction of levofloxacin antibiotic. The as-prepared carbon quantum dots/CdS/Ta3N5 heterojunction nanofibers manifest a significantly strengthened photocatalytic levofloxacin degradation activity, with the rate constant (0.0404 min−1) exceeding Ta3N5, CdS/Ta3N5, and CdS by 39.4, 2.1, and 7.2 folds. Such remarkable photocatalytic performance is credited to the unique 1D/0D/0D core-shell heterostructure with compact-bound hetero-interface, which favors the synergistic effect between carbon quantum dots modification and S-scheme junction. This work offers a new way for developing new Ta3N5-based heterojunctions for environmental remediation.

Key words: Carbon quantum dots, S-scheme heterojunction, Ta3N5 fibers, Synergistic effect, Photocatalysis