Electrospinning Machine | Constructing 0D Bismuth-Metal Nanosphere Networks on1D/2D BizWO6 Heteromorphic Junctions for Efficient Photocatalytic Degradation of Acetaldehyde

Challenge: Semiconductor photocatalysis has great potential in degrading volatile organic compounds (VOCs), but photocatalyst efficiency is often low due to insufficient surface catalytic active sites, limited light absorption, and poor carrier separation efficiency. 

Method: Professor Yan Jianhua's team at Donghua University, inspired by eucalyptus structure, proposed a selective reduction strategy to grow bismuth nanosphere networks on 1D/2D Bi2WO6 (BWO) heterojunctions composed of interwoven mesoporous nanofibers (NFs) and nanosheets (NSs). This establishes a synergistic mechanism of "surface active sites-intrinsic defects-carrier separation". 

Innovation 1: Electrospun BWO precursor NFs were calcined in air, causing 2D NSs to grow radially along the NFs at ordered intervals, forming 1D/2D BWO structure. Subsequently, under H2/Ar reduction, Bi3+ was preferentially reduced to Bi⁰ along the NF axis and NS corners, forming a dynamically evolving metal defect regulation system. 

Innovation 2: The 0D/1D/2D Bi-BWO photocatalyst can rapidly degrade 100% acetaldehyde and exhibits excellent stability over 5 cycles. Its degradation rate is 3.5 times faster than 1D/2D BWO, significantly outperforming conventional BWO. 

https://doi.org/10.1002/adma.202513684