磷掺杂碳量子点的制备及活化过一硫酸盐降解亚甲基蓝

doi:10.19964/j.issn.1006-4990.2023-0218

Abstract

Abstract:

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.

Key words: carbon quantum dots, peroxymonosulfate, catalytic degradation, methylene blue

CLC Number:

TQ126.31

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.

Figures/Tables 7

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References 21

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激发态	E_exc/eV		Sr指数/a.u.		D指数/Å		E_cae/eV
激发态	CQDs	P-CQDs	CQDs	P-CQDs	CQDs	P-CQDs	CQDs	P-CQDs
S0→S1	1.509	1.008	0.650 08	0.627 74	3.734	2.749	3.217	3.830
S0→S2	2.167	1.710	0.749 92	0.658 34	3.338	3.647	3.337	3.257
S0→S3	2.601	2.050	0.792 24	0.556 82	2.101	4.307	3.431	3.089
S0→S4	2.976	2.450	0.789 41	0.691 93	2.094	3.034	3.451	3.295
S0→S5	3.042	2.550	0.806 04	0.689 24	2.838	2.118	3.753	3.727

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Preparation of phosphorus-doped carbon quantum dots and activation of peroxymonosulfate for degradation of methylene blue

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