Precise Regulation of Ultra-Thin Platinum Decorated Gold/Graphite Carbon Nitride Photocatalysts by Atomic Layer Deposition for Efficient Degradation of Rhodamine B Under Sun Sunlight
Atomic Layer Deposition (ALD) precise controlling ultra-thin platinum(Pt) modified Graphite carbon nitride (g-C 3 N 4 ) photocatalysts, which had been doped with gold nanoparticles (Au NPs) by photodeposition, were successfully synthesized. The experimental results showed that precise regulation of platinum decorated C 3 N 4 -Au(C 3 N 4 -Au/nPt (n is the number of Pt ALD cycles, ~ 1 angstrom per cycle) exhibited excellent photocatalytic degradation ability for Rhodamine B (RhB). Under simulated sunlight irradiation, the degradation rate of 10 mg/L RhB(100 mL) by 1.5 mg C 3 N 4 -Au/10Pt catalysts was 95.8% within 60 minutes that is much better than other photocatalysts for the degradation of RhB. The efficient degradation mechanism of RhB by C 3 N 4 -Au/10Pt photocatalysts was studied and the experiments demonstrated the ·O 2 - as main active species played an important role in the photocatalytic process. Local surface plasmon resonance (LSPR) of Au NPs and Schottky barrier between Pt clusters and g-C 3 N 4 may be the reasons for enhanced C 3 N 4 -Au/10Pt photocatalytic performances. Furthermore, the successive catalytic cycles revealed the excellent stability of C 3 N 4 -Au/10Pt photocatalyst
Year of publication: |
[2022]
|
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Authors: | Zhang, Hongfen ; Zhang, Baiyan ; Liang, Fangmiao ; Fang, Yang ; Wang, Hong ; Chen, Anjia |
Publisher: |
[S.l.] : SSRN |
Description of contents: | Abstract [papers.ssrn.com] |
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