Highly Efficient Ag 2 O/Bi 2 O 2 CO 3 p-n Heterojunction Photocatalysts with Improved Visible-Light Responsive Activity
2014; American Chemical Society; Volume: 6; Issue: 14 Linguagem: Inglês
10.1021/am502481z
ISSN1944-8252
AutoresNa Liang, Min Wang, Lun Jin, Shoushuang Huang, Wenlong Chen, Miao Xu, Qingquan He, Jiantao Zai, Nenghu Fang, Xuefeng Qian,
Tópico(s)Gas Sensing Nanomaterials and Sensors
ResumoAg2O/Bi2O2CO3 p-n heterojunctions are prepared with commercial Bi2O2CO3 as precursor via a simple photosynthesis process. The obtained Ag2O/Bi2O2CO3 p-n heterojunctions show higher photocatalytic activity than that of pure n-Bi2O2CO3, and the obtained Ag2O/Bi2O2CO3 (AB-4) heterojunction exhibits the best photocatalytic activity under visible light (λ > 400 nm), with which Rhodamine B, methyl blue and methyl orange can be completely degraded within 12 min. Photoluminescent spectra and photoelectrochemical measurement further indicate that the Ag2O/Bi2O2CO3 p-n heterojunctions greatly enhance the charge generation and suppress the charge recombination of photogenerated electron–hole pairs, which would be beneficial to improve their photocatalytic activity.
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