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Exploration of long afterglow luminescent materials composited with graphitized carbon nitride for photocatalytic degradation of basic fuchsin

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Abstract

The frequent exposure of the widely used dye, basic fuchsin (BF), is seriously threatening the health of human central nervous system. Thus, removing the environmental pollution caused by BF is crucial, and photocatalytic technology recently has been used to degrade the pollutions dye. In this study, the binary composite SrAl2O4:Eu2+, Dy3+/g-C3N4 was prepared by high-temperature calcination and then applied in BF photodegradation. The results confirmed that the composite material had lower band gap value (Eg) and stronger visible light absorption ability. The photocatalytic capacity of the new composite materials was enhanced compared to that of the non-composite materials. By using the new binary-composited materials, 80% of BF could be degraded in 10 min, and the degradation ratio reached 100% in 30 min. More importantly, even the light source was removed, the photocatalytic reaction could continue due to the luminescence of SrAl2O4:Eu2+, Dy3+, and the degradation efficiency of BF could finally reach more than 90% within 3 h. By quenching experiments and electron spin resonance (ESR) spectra analysis, superoxide anion (·O2) was verified to be the main active substance in this reaction process. Moreover, the excellent stability and recyclability of this catalyst was also proved. Furthermore, the new composite materials were utilized to degrade the BF aqueous solution and actual lake water, and the total organic matter contents (TOC) were measured. TOC values in these two systems decreased after photocatalytic reaction, which indicated that this catalyst has a great development prospect in the removal of organic matter in water. Our study confirmed a new kind of material of high performance with great significance for emergency treatment of water pollution in practical applications.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the Excellent Youth Project of Hunan Province (2022JJ20039), the Foundation of Hunan Educational Committee (21B0283), and the Graduate Research Innovation Project of Changsha University of Science and Technology (CX2021SS85).

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SSL, conceptualization, data curation, formal analysis, investigation, and writing-review and editing; ML, conceptualization and writing-review and editing; LW, conceptualization and writing-review and editing; ZX, conceptualization and validation; YHC, conceptualization and validation; MLC, conceptualization, validation, and writing-review and editing.

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Correspondence to Mao-Long Chen.

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The authors declare no competing interests.

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Responsible Editor: Sami Rtimi

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Li, SS., Liu, M., Wen, L. et al. Exploration of long afterglow luminescent materials composited with graphitized carbon nitride for photocatalytic degradation of basic fuchsin. Environ Sci Pollut Res 30, 322–336 (2023). https://doi.org/10.1007/s11356-022-22097-7

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  • DOI: https://doi.org/10.1007/s11356-022-22097-7

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