Stereolitografijos būdu gauti boro nitrido pagrindu sukurti 3D fotokatalizatoriai su kontroliuojama architektūra vandens valymui

Anotacija

A novel boron nitride (BN) containing composite photoresin was developed and used to fabricate BN-based three-dimensional (3D) photocatalysts with controlled geometries via stereolithography (SLA), followed by pyrolysis. Three architectures – gyroid, honeycomb and cubic lattice structures with different structural periodicities – were produced and characterised. The influence of 3D architecture on structural integrity and photocatalytic performance was evaluated through the degradation of Rhodamine B (RhB) under halogen lamp irradiation. The photocatalytic performance strongly depended on the architecture, with increasing structural periodicity leading to a higher density of fabrication defects, a reduced solution permeability, and a lower accessible active surface area. Among all investigated structures, the 2 × 2 cubic lattice exhibited the highest photocatalytic performance, achieving 88.44% RhB degradation after 150 min of halogen lamp irradiation and the highest surface area-normalised efficiency of 259.9 mg/m2. These findings demonstrate that additive manufacturing enables the fabrication of efficient, reusable, self-supporting h-BN-based photocatalysts.