In this work, we reported a method for a fabrication of bead-on-string structured g-C3N4/CoFe2O4 composite nanofibers by electrospinning coupled with in situ calcination. For the first time, this catalyst effectively removed high concentrations of mixed organic pollutants through the synergistic effects of adsorption and photocatalysis. The composite materials removal efficiency of adsorption and photocatalytic for high concentrations of organic pollutants in wastewater can exceed 90%. Surface potential analysis using in situ Kelvin probe force microscopy demonstrated the electron transfer pathways on the catalyst surface. The formation of the heterojunction was demonstrated through DFT calculations to significantly enhance the efficiency of electron–hole separation. This work provided valuable insights for the development of efficient catalysts for the synergistic adsorption-photocatalytic treatment of environmental pollutants, thus addressing increasingly severe environmental challenges.

A beaded g-C3N4CoFe2O4 nanofibers for efficient adsorbing and catalytical degrading multiple pollutants
    Abstract
    1 Introduction
    2 Experimental section
        2.1 Adsorption and photocatalysis experiments
            2.1.1 Adsorption experiments
            2.1.2 Photocatalysis experiments
        2.2 Preparation of photocatalysts
            2.2.1 Synthesis of cluster g-C3N4
            2.2.2 Synthesis of CoFe2O4 and g-C3N4CoFe2O4 fiber films
    3 Results and discussion
        3.1 Morphological and structural characterizations
        3.2 Adsorption performance study
        3.3 Adsorption mechanism
        3.4 Investigation of photocatalytic performance
        3.5 Degradation pathway and toxicological analysis
        3.6 Photocatalytic mechanism
    4 Conclusion
    Acknowledgements 
    References

• Zhi Li(Collaborative Innovation Center for Nanomaterials and Devices, College of Physics, Shandong Key Laboratory of Medical and Health Textile Materials, Qingdao University, Qingdao 266071, China)
• Rui Liu(Collaborative Innovation Center for Nanomaterials and Devices, College of Physics, Shandong Key Laboratory of Medical and Health Textile Materials, Qingdao University, Qingdao 266071, China)
• Wen‑Jie Zhang(Collaborative Innovation Center for Nanomaterials and Devices, College of Physics, Shandong Key Laboratory of Medical and Health Textile Materials, Qingdao University, Qingdao 266071, China)
• Yu‑Ze Sun(Collaborative Innovation Center for Nanomaterials and Devices, College of Physics, Shandong Key Laboratory of Medical and Health Textile Materials, Qingdao University, Qingdao 266071, China)
• Yun‑Ze Long(Collaborative Innovation Center for Nanomaterials and Devices, College of Physics, Shandong Key Laboratory of Medical and Health Textile Materials, Qingdao University, Qingdao 266071, China, State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University), Qingdao 266071, China)
• Ru Li(Instrumental Analysis Center of Qingdao University, Qingdao 2266071, China)
• Yong Wan(College of Physics Science, Qingdao University, Qingdao 266071, China)
• Lei Yang(Research Center for Smart Intelligent and Wearable Technology College of Textiles and Clothing, Qingdao University, Qingdao 266071, China)