期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 269, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118774
关键词
Photocatalysis; Solid solution; Bi12O17Cl12; Tetrachlorobiphenyl A; Degradation mechanism
资金
- National Natural Science Foundation of China [51578354]
- Six Talent Peaks Program [2016JNHB-067]
- Suzhou Science and Technology Bureau [SS201802]
- Natural Science Research Project of Jiangsu Province Higher Education [18KJA610002]
- Pre-research Fund of Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment [XTCXSZ2019-4]
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.
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