Abstract
The muti-dimensional carbon quantum dots (CQDs) modifying sphere-flower CdIn 2 S 4 on nitrogen doping on reduced graphene oxide (N-rGO) photocatalyst is fabricated through the simple hydrothermal method and solvothermal method. CQDs/CdIn 2 S 4 /N-rGO composites show good photocatalytic degradation for 80% 50 mg/L 2,4-dichlorophenol under visible light for 6 h, which could be ascribable to the good conductive property and defects of N-rGO sheet (two dimension) and the heterojunction constructed between CQDs (zero dimension) and sphere-flower CdIn 2 S 4 (three dimension), and synergism among them. These are evidenced by the photoluminescence spectra, photocurrent intensity, high-resolution transmission electron microscopy and Raman spectra. Besides, the results of ESR show that ·O 2 − and ·OH radicals both are generated under visible light, ·OH the main one further confirmed by free radicals trapping experiments. This work will give some inspirations for constructing multi-dimensional semiconductors with excellent photocatalytic performance.
Original language | English |
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Pages (from-to) | 142-153 |
Number of pages | 12 |
Journal | Journal of the Taiwan Institute of Chemical Engineers |
Volume | 99 |
DOIs | |
State | Published - Jun 2019 |
Externally published | Yes |
Keywords
- CQDs
- CQDs/CdIn S /N-rGO
- N-rGO
- Photodegradate 2,4-dichlorophenol
- Visible light