Flexible core–shell difunctional nanoreactor CsPbBr3@Bi2MoO6–CuS/PAN for real-time monitoring of photocatalysis

Abstract

To address the challenges posed by persistent pollutants in aquatic environments, it is essential to establish effective heterogeneous structures to accelerate the separation of photogenerated carriers and promote the generation of free radicals, thereby significantly enhancing the efficiency of photocatalytic degradation of pollutants. Herein, the flexible core–shell fiber nanoreactor CsPbBr₃@Bi₂MoO₆–CuS/PAN (CBC/PAN) is constructed by in situ synthesis and coaxial electrostatic spinning, achieving a synergistic effect of efficient photocatalysis and real-time temperature monitoring. The catalytic activity of CBC/PAN nanoreactor is 8.13 times higher than that of pure Bi₂MoO₆, which is attributed to the construction of exciton dissociation interfaces and charge transport channels, improving the distribution of active centers on the surface. The effective intermolecular collisions in the confined environment circumvent the negative external influences and greatly enhance the stability in extreme environments. Accurate temperature monitoring of a complex catalytic system, based on fluorescence intensity-specific temperature measurements, is achieved via the emission peaks of CsPbBr₃ and polyacrylonitrile, enabling the determination of optimal temperature conditions and the detection of the stability of the catalyst. This bifunctional nanocatalyst combines highly efficient photocatalysis with real-time temperature feedback, offering promising prospects for the application of photocatalytic technology in environmental purification, microbial detection and carbon dioxide reduction.