Sustainable and efficient photocatalytic tandem reaction system for H2O2 production simultaneous bleaching of fabric over K-doped g-C3N4

The primary aim of this study was to devise an efficient and environmentally eco-friendly alternative technology to traditional hydrogen peroxide (H2O2) fabric bleaching, while also introducing a novel bleaching mechanism. Initially, K-doped g-C3N4 was synthesized and subsequently employed in a photocatalytic bleaching fabric system based on H2O2 ready-to-use process. Results revealed that the impressive fabric whiteness values were achieved with an obvious reduced additives and lower temperatures contrasted with traditional H2O2 bleaching methods. And the K doping content played pivotal role in influencing H2O2 yields and fabric whiteness. Remarkably, unlike the degradation of free mulberry, the removal on cotton fabrics shows an induction period.& sdot;O2-and H2O2 were found as primary species responsible for fabric whitening, rather than active ingredients derived from H2O2 decomposition, which differs from conventional bleaching mechanism. Consequently, this study offers a fresh perspective on the promising path towards green and efficient fabric bleaching method, ultimately contributing to a cleaner production in the printing and dyeing industry.