ABSTRACT Water pollution from organic contaminants, such as dyes, poses significant environmental threats, highlighting the need for efficient and sustainable remediation strategies. Photocatalysis using titanium dioxide (TiO 2 ) nanoparticles is widely employed for degrading such pollutants; however, its low recoverability and limited reusability hinder large‐scale implementation. Here, we report a systematic strategy to overcome these limitations through doping of TiO 2 nanoparticles followed by in situ growth of sodalite (SOD) frameworks around the nanoparticles, in contrast to the conventional approach of depositing TiO 2 onto pre‐formed zeolites. Doping narrows TiO 2 ’s bandgap, enhancing visible‐light‐driven photocatalytic activity, while in situ growth of SOD ensures firm immobilization, preventing leaching and structural degradation. Systematic variation of (1) type and concentration of dopant, (2) TiO 2 loading, and (3) SOD crystallization parameters yields a photocatalyst that is effective irrespective of pollutant charge and retains structural integrity and catalytic performance over multiple cycles, demonstrating excellent recoverability and reusability (∼78.6% of original weight and ∼34.8% degradation efficiency after three reuse cycles). The composite also maintains high aqueous stability (zeta potential ∼−32 mV), allowing ease of processing into thin films and coatings. This integrated approach offers a scalable and sustainable platform for designing efficient and durable photocatalysts for environmental remediation.
Usman et al. (Fri,) studied this question.