期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 15, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/s11051-013-1773-4
关键词
BiOI; Nanoplates; Adsorption; Visible light irradiation; Solvothermal process
资金
- National Natural Science Foundation of China [51172109]
- Natural Science Foundation of Jiangsu Province of China [BK2010497]
Uniform well-crystallized flower-like BiOI nanoplates contained 3.7 nm mesopores, which may be attributed to the internanosheet spaces of BiOI with maximum pore diameters of about 30 nm, were successfully synthesized via a simple ethylene glycol-assisted solvothermal method. The as-prepared porous BiOI nanoplates exhibited excellent adsorption ability, and the saturated extent of adsorption of BiOI over an RhB solution was as high as 197 mg/g, which is much higher than those for BiOCl and BiOBr prepared via the same method and with a similar surface area. The probable adsorption mechanism could have originated from the interaction between the I atom in BiOI and a proton in RhB at different pH values and temperatures. With visible light irradiation (lambda > 420 nm), 80 % of the RhB was degraded in 4 h, while BiOI still demonstrated reasonably outstanding photocatalytic ability under green light (lambda = 550 +/- 15 nm) because of its low-energy gap (1.72 eV). The degradation test for BiOI under irradiation at lambda = 550 +/- 15 nm is an excellent achievement for field applications because the catalyst can be applied in solar irradiation to remove organic pollutants, which may be of great value BiOI complex.
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