Abstract
Enhancing indoor air quality and devising efficient technologies for the degradation of low-concentration volatile organic compounds (VOCs) represent pertinent topics in current research endeavors. In this study, a one-step hydrothermal method was employed to successfully synthesize a Bi2W0.25Mo0.75O6 solid solution photocatalyst featuring Mo and O double vacancies. The catalyst has excellent degradation effect on low concentration (30 ppm) gaseous toluene within 60 min of visible light irradiation, which can achieve 95.36 % in air atmosphere and 99.79 % in pure oxygen atmosphere. The incorporation of Mo vacancies in the solid solution photocatalyst proved instrumental in inhibiting carrier complexation, while O vacancies facilitated the activation of molecular oxygen. Concurrent Mo and O double vacancies extended the photo response range, expedited the transport of photogenerated charges, and diversified the reactive oxygen species pool, collectively enhancing toluene degradation. Hence, this study presents a compelling method for the fabrication of photocatalysts exhibiting visible light catalytic activity, with potential applications in the treatment and mitigation of real-world environmental pollution challenges under mild conditions.
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