Abstract
With a view to balancing light absorption and redox capabilities, narrowing band gap and adjusting bandgap structure, a novel tubular Bi12O17ClxBr2−x (BCxB2−x) solid solution structure was fabricated using a facile polyvinylpyrrolidone K30 assisted solvothermal strategy. Photocatalytic degradation experiments were conducted under visible light, utilizing tetrachlorobiphenyl A (TCBPA) as the target pollutant. Within 120 min of irradiation, the Bi12O17ClBr (BCB) solid solution nanotubes exhibited approximately 92.8 % TCBPA degradation efficiency. Moreover, the active radical trapping experiments and electron spin resonance measurements show that superoxide and hydroxyl radicals play important roles. Importantly, BCB solid solution photocatalysts have a stable crystal structure and good recycling ability after five cycles of photodegradation. The work presents a feasible synthesis method for the design of solid solution materials and introduction of oxygen vacancies to improve visible-light photocatalytic ability for the treatment of environmentally refractory organic pollutants.
Published Version
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