Detection of Cu2+, Degradation of Acid Brown and Removing Cd2+ from the Water by High Photoluminescence Carbon Dots Synthesized from Milk

IF 1.4 Q4 NANOSCIENCE & NANOTECHNOLOGY Journal of Nanostructures Pub Date : 2020-01-01 DOI:10.22052/JNS.2020.01.017

Sahar Mohseni, M. Sabet, S. Saeednia, M. Ahmadi

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Abstract

In this experimental work, nitrogen-doped carbon quantum dots were successfully synthesized with hydrothermal of the milk. The product was composed of a powder and a stable colloid. The structure of the product was examined by XRD, EDS and FT-IR analysis. Also the particle size of the product was investigated by SEM and TEM images and the results showed the product is mainly composed of the particles with less than 5 nm in diameter. The photoluminescence intensity of the product was obtained by PL analysis and it was found the product has high photoluminescence intensity that can be improved by surface modification with N-Methyl-2-pyrrolidone. Due to high photoluminescence intensity of the obtained quantum dots they were used as sensor to detection of Cu2+ and it was observed they can detect this ion in the aqueous medium for 0-80 uM concentration range. Also it was found by surface modification of carbon dots with N-Methyl-2-pyrrolidone, the detection sensitivity is improved. The optical properties of the product were studied by UV-Vis spectroscopy.

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牛奶合成高光致发光碳点对水中Cu2+的检测、酸褐色的降解及Cd2+的去除

本实验成功地利用牛奶水热合成了氮掺杂碳量子点。该产品由粉末和稳定的胶体组成。通过XRD、EDS和FT-IR分析对产物的结构进行了表征。通过扫描电镜(SEM)和透射电镜(TEM)对产物的粒径进行了表征，结果表明产物主要由直径小于5 nm的颗粒组成。通过PL分析得到产物的光致发光强度，发现产物具有较高的光致发光强度，通过n -甲基-2-吡咯烷酮的表面改性可以提高产物的光致发光强度。由于获得的量子点具有较高的光致发光强度，它们被用作检测Cu2+的传感器，并且观察到它们可以在0-80 uM浓度范围内检测水介质中的Cu2+。用n -甲基-2-吡咯烷酮对碳点进行表面修饰，提高了检测灵敏度。用紫外-可见光谱法研究了产物的光学性质。

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来源期刊

Journal of Nanostructures NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

7 weeks

期刊介绍： Journal of Nanostructures is a medium for global academics to exchange and disseminate their knowledge as well as the latest discoveries and advances in the science and engineering of nanostructured materials. Topics covered in the journal include, but are not limited to the following: Nanosystems for solar cell, energy, catalytic and environmental applications Quantum dots, nanocrystalline materials, nanoparticles, nanocomposites Characterization of nanostructures and size dependent properties Fullerenes, carbon nanotubes and graphene Self-assembly and molecular organization Super hydrophobic surface and material Synthesis of nanostructured materials Nanobiotechnology and nanomedicine Functionalization of nanostructures Nanomagnetics Nanosensors.