Inorganic Chemicals Industry >
Preparation of phosphorus-doped carbon quantum dots and activation of peroxymonosulfate for degradation of methylene blue
Received date: 2023-04-17
Online published: 2024-01-18
A phosphorus-doped carbon quantum dots（P-CQDs） method was reported，detailed characterization of P-CQDs was performed by infrared spectroscopy（FT-IR），X-ray photoelectron spectroscopy（XPS），and transmission electron microscopy（TEM），and the results confirmed that phosphorus was successfully accessed CQDs.The introduction of phosphorus could reduce the forbidden band width of CQDs，thus improving the absorption of light and promoting photogenerated electron transfer.Under visible light irradiation，the degradation of MB was 99% in 10 min at the PMS concentration of 0.4 mmol/L at the P-CQDs dosage of 0.5 g/L.The effects of P-CQDs dosage，PMS concentration and MB concentration on the system degradation efficiency of MB were investigated.Meanwhile，the mechanism of MB degradation by P-CQDs photocatalytically activated PMS was investigated by free radical burst experiments，and the results showed that superoxide radical（O2•-） was the main active substance.
ZHANG Lijie , LI Degang , HAN Wenyuan , XU Huijun , ZHANG Weimin , YU Chen . Preparation of phosphorus-doped carbon quantum dots and activation of peroxymonosulfate for degradation of methylene blue[J]. Inorganic Chemicals Industry, 2024 , 56(1) : 126 -133 . DOI: 10.19964/j.issn.1006-4990.2023-0218
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