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磷掺杂碳量子点的制备及活化过一硫酸盐降解亚甲基蓝

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报道了一种磷掺杂碳量子点(P-CQDs)的方法,用红外光谱(FT-IR)、X射线光电子能谱仪(XPS)、透射电子显微镜(TEM)等对P-CQDs进行了详细表征,结果证实磷成功接入了CQDs.引入磷可以减少CQDs的禁带宽度,从而提高对光的吸收和促进光生电子转移.在可见光照射下,P-CQDs的用量为0.5 g/L、过一硫酸盐(PMS)的浓度为0.4 mmol/L时,10 min内亚甲基蓝(MB)的降解率为99%.考察了P-CQDs用量、PMS浓度和MB浓度等因素对体系降解MB效率的影响.同时,用自由基淬灭实验考察了P-CQDs光催化活化PMS降解MB的机理,结果表明超氧自由基(O2·-)是主要的活性物质.
Preparation of phosphorus-doped carbon quantum dots and activation of peroxymonosulfate for degradation of methylene blue
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 mi-croscopy(TEM),and the results confirmed that phosphorus was successfully accessed CQDs.The introduction of phospho-rus 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 photo-catalytically activated PMS was investigated by free radical burst experiments,and the results showed that superoxide radi-cal(O2·-)was the main active substance.

carbon quantum dotsperoxymonosulfatecatalytic degradationmethylene blue

张利洁、李德刚、韩文渊、徐会君、张维民、郁宸

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山东理工大学,山东淄博 255000

碳量子点 过一硫酸盐 催化降解 亚甲基蓝

国家自然科学基金项目

21776175

2024

无机盐工业
中海油天津化工研究设计院 中国化工学会无机酸碱盐专业委员会

无机盐工业

CSTPCD北大核心
影响因子:0.489
ISSN:1006-4990
年,卷(期):2024.56(1)
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