量子产额
光催化
材料科学
荧光
亚甲蓝
热液循环
检出限
可见光谱
光化学
吸收(声学)
碳纤维
量子点
柠檬酸
分析化学(期刊)
量子效率
碳量子点
核化学
纳米技术
光电子学
化学工程
光学
有机化学
化学
色谱法
催化作用
物理
复合材料
复合数
工程类
作者
Yun Wang,Fei Guo,Chunxing Li,Qin Meng,Xiaoxi Hu
出处
期刊:NANO
[World Scientific]
日期:2023-05-01
卷期号:18 (05)
标识
DOI:10.1142/s1793292023500340
摘要
This work reports a simple, low cost and eco-friendly one-step hydrothermal method to obtain Si- and N-doped carbon quantum dots (Si-N-CQDs) using only citric acid and (3-aminopropyl) trimethoxysilane. These codoped Si-N-CQDs demonstrated 0D spherical morphology and an average size of [Formula: see text]2.54 nm as well as good solubility in water and high quantum yield equal to 14.3%. Fluorescence emission of these Si-N-CQDs was quenched selectively under the presence of [Formula: see text]. Based on this property, we developed a very sensitive sensor capable of detecting [Formula: see text] up to 400 [Formula: see text]M concentration with a 3.14 [Formula: see text]M detection limit. This sensor was used for [Formula: see text] detection in real tap and lake water and demonstrated satisfactory recovery equal to 102.3–108.0% and 103.5–108.5%, respectively. Photocatalytic activity of our Si-N-CQDs was demonstrated using methylene blue (MB) organic dye. The degradation rate of MB under visible light irradiation increased 2.7 times under the presence of Si-N-CQDs within 60 min. Such excellent performance was attributed to very efficient light absorption of Si-N-CQDs as well as excellent electron transfer and separation of photogenerated charge carriers.
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