Electrospinning Synthesized Cd 0.3 Zn 0.7 S@PVDF/PAN Piezoelectric Nanofiber Membrane for Efficient Photocatalytic Hydrogen Evolution

ABSTRACT Photocatalytic hydrogen evolution technology is a crucial approach to achieve efficient solar energy conversion and green hydrogen production. However, traditional semiconductor photocatalysts often face issues such as weak visible‐light response, high photogenerated charge carrier recombination, and poor structural stability, severely limiting their practical use. In this study, Cd 0.3 Zn 0.7 S (CZS) nanoparticles were employed as the photocatalytic functional unit, and polyvinylidene fluoride/polyacrylonitrile (PVDF/PAN) nanofiber membranes with varying CZS doping concentrations (referred to as CPP membranes) were constructed via electrospinning technology. This design ingeniously integrates the piezoelectric property of PVDF with the electron‐withdrawing characteristic of the ‐CN groups in PAN, thereby forming a functional support that can effectively promote the separation of photogenerated charge carriers and inhibit photocorrosion. Meanwhile, the composite membranes exhibit excellent structural robustness and satisfactory cyclic stability. The results demonstrate that the CPP membrane with a CZS doping ratio of 7.5 wt% achieves optimal comprehensive performance: Under visible‐light irradiation, its photocatalytic hydrogen evolution rate reaches 27.1 mmol g −1 h −1 , which is approximately 1.7 times that of pure CZS particles; moreover, the apparent quantum efficiency (AQE) at a wavelength of 420 nm attains 30.47%. This research provides a novel strategy for the construction of high‐efficiency and stable piezoelectric‐enhanced photocatalytic materials.