Construction, enhanced visible-light photocatalytic activity and application of multiple complementary Ag dots decorated onto Ag2MoO4/AZO hybrid nanocomposite

It is of urgency to develop novel and high-efficient visible-light photocatalysts to eliminate antibiotics and organic pollutants rapidly in sewage. Therefore, the silver molybdate/aluminum atoms-doped zinc oxide (Ag 2 MoO 4 /AZO) nanocomposite was prepared by in situ deposition, and then the Ag dot...

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Bibliographic Details
Published in:Research on chemical intermediates 2019-02, Vol.45 (2), p.873-892
Main Authors: Xue, Ya-Nan, Sun, Yi-Shuo, Liu, Jin-Ku, Wang, Yuan-Yuan, Wang, Xiao-Gang, Yang, Xiao-Hong
Format: Article
Language:English
Subjects:
Aluminum
Antibiotics
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Decoration
Electromagnetic absorption
Inorganic Chemistry
Nanocomposites
Photocatalysis
Physical Chemistry
Pollutants
Recyclability
Sewage
Silver
Solid solutions
Surface stability
Zinc oxide
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Summary:It is of urgency to develop novel and high-efficient visible-light photocatalysts to eliminate antibiotics and organic pollutants rapidly in sewage. Therefore, the silver molybdate/aluminum atoms-doped zinc oxide (Ag 2 MoO 4 /AZO) nanocomposite was prepared by in situ deposition, and then the Ag dots were decorated on this nanocomposite surface via photo-reduced reaction forming a multiple complementary Ag@Ag 2 MoO 4 /AZO hybrid nanocomposite. The photogenerated electrons of AZO transferred to Ag 2 MoO 4 surface, which solved the optical instability of Ag 2 MoO 4 material increasing the recyclability. The photocatalytic efficiency of Ag@Ag 2 MoO 4 /AZO nanocomposite still remained 90.0% after eight runs. Meanwhile, the Ag dots decorated on the Ag@Ag 2 MoO 4 /AZO nanocomposite surface decreased the band gap and broadened the visible-light absorption range, promoting the efficient separation of photogenerated carriers. Because of the synergistic complementary effect of Ag dots and AZO solid solution, the Ag@Ag 2 MoO 4 /AZO hybrid nanocomposite showed excellent photocatalytic activity on organic pollutants compared to AZO and Ag 2 MoO 4 material (282.3% and 422.7% improvement, respectively). In addition, the gatifloxacin was completely degraded to CO 2 and H 2 O within 40 min, indicating that the Ag@Ag 2 MoO 4 /AZO hybrid nanocomposite also has excellent application in the treatment of antibiotics.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-018-3649-9