期刊
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
卷 105, 期 1-7, 页码 42-59出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02772248.2023.2203494
关键词
Ca aluminate nanoflakes; hydrothermal synthesis; gentian violet; photocatalysis
Calcium aluminate nanoflakes with a single crystalline orthorhombic Ca5Al6O14 phase and a thickness of about 50 nm were synthesized. The presence of elements O, Al, and Ca in the nanoflakes was confirmed by element mapping and X-ray photoelectron spectroscopy. The formation and growth of the nanoflakes can be explained by nucleation and crystalline growth process. The nanoflakes exhibit a band gap of 3.87 eV and have good photocatalytic activity towards gentian violet.
Calcium aluminate nanoflakes possessing a single crystalline orthorhombic Ca5Al6O14 phase and a thickness of about 50 nm were synthesized via a simple route. The elements O, Al, and Ca were confirmed in the nanoflakes by element mapping and X-ray photoelectron spectroscopy. Formation and growth of the nanoflakes can be explained by a nucleation and crystalline growth process. The nanoflakes exhibit a band gap of 3.87 eV which entails good photocatalytic activity towards gentian violet which, in aqueous solution at a concentration of 10 mg L-1, can be entirely degraded within 100 min upon irradiation of a 175 W mercury lamp using 1 g L-1 calcium aluminate nanoflakes as catalyst. The reaction rate constant is 0.032 min(-1) which is six times higher than that using calcium aluminate nanostructures obtained from different conditions. The nanoflakes are recoverable and possess good stability for the gentian violet degradation.
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