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Hydrolysis of urea induces the formation of bismuth-rich Bi4O5I2 nanosheets with promoted visible-light photoreduction of Cr (VI).
- Source :
-
Materials Letters . Jan2021, Vol. 282, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • Bismuth-rich Bi 4 O 5 I 2 nanosheets were prepared through progressive hydrolysis of urea in a facile solvothermal route. • Adjusting the sufficient and progressive hydrolysis of urea in ethylene glycol is vital step. • Resulted Bi 4 O 5 I 2 nanosheets exhibited superior visible-light photoreduction activity of Cr (VI). Bismuth-rich Bi 4 O 5 I 2 nanosheets were prepared through progressive hydrolysis of urea in a facile solvothermal route, which is different from the conventional strategies of pH adjusting or calcination. To promote the hydrolysis of urea for the formation of Bi 4 O 5 I 2 nanosheets, the type of solvents and urea concentration were the distinctive roles. Especially, urea concentration over 1.0 g but less than 3.0 g in the solvent of ethylene glycol could boost the formation of Bi 4 O 5 I 2 nanosheets. Furthermore, the resulted Bi 4 O 5 I 2 nanosheets possessing more negative conductive band level of −1.02 eV showed superior visible-light photoreduction activity of Cr (VI) due to the efficient separation of charge carriers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOTOREDUCTION
*UREA
*HYDROLYSIS
*ETHYLENE glycol
*CHARGE carriers
Subjects
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 282
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 146872869
- Full Text :
- https://doi.org/10.1016/j.matlet.2020.128693