壳聚糖碳点的水热法制备及其对金属离子的选择性研究

汪雪琴; 洪碧云; 杨旋; 梁倩; 黄彪; 唐丽荣

doi:10.3788/fgxb20194003.0289

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壳聚糖碳点的水热法制备及其对金属离子的选择性研究

材料合成及性能 | 更新时间：2020-08-12

- 壳聚糖碳点的水热法制备及其对金属离子的选择性研究
- Hydrothermal Preparation of Chitosan Carbon Dots and Their Selectivity to Metal Ions
- 发光学报 2019年40卷第3期页码：289-297
- 作者机构：
  
  1. 福建农林大学材料工程学院,福建福州,350002
  2. 福建农林大学金山学院,福建福州,350002
- 作者简介：
- 基金信息：
  
  林业公益性行科研专项（201504603）;国家自然科学基金（31770611）;福建省科技厅自然科学基金（2016J01088）;福建农林大学"校杰出青年科研人才"培养专项基金（xjq201422）资助项目
- DOI：10.3788/fgxb20194003.0289
  中图分类号： O613.71
- 纸质出版日期：2019-3-5，
  
  网络出版日期：2018-9-17，
  
  收稿日期：2018-5-21，
  
  修回日期：2018-8-21，
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汪雪琴, 洪碧云, 杨旋等. 壳聚糖碳点的水热法制备及其对金属离子的选择性研究[J]. 发光学报, 2019,40(3): 289-297

WANG Xue-qin, HONG Bi-yun, YANG Xuan etc. Hydrothermal Preparation of Chitosan Carbon Dots and Their Selectivity to Metal Ions[J]. Chinese Journal of Luminescence, 2019,40(3): 289-297
汪雪琴, 洪碧云, 杨旋等. 壳聚糖碳点的水热法制备及其对金属离子的选择性研究[J]. 发光学报, 2019,40(3): 289-297 DOI： 10.3788/fgxb20194003.0289.

WANG Xue-qin, HONG Bi-yun, YANG Xuan etc. Hydrothermal Preparation of Chitosan Carbon Dots and Their Selectivity to Metal Ions[J]. Chinese Journal of Luminescence, 2019,40(3): 289-297 DOI： 10.3788/fgxb20194003.0289.

摘要

以壳聚糖为碳源通过水热法合成碳点，对影响碳点荧光强度的水热温度、水热时间和壳聚糖质量分数进行考察。通过紫外分光光度计、荧光分光光度计、原子力显微、Fourier红外光谱仪、X-ray光电子能谱、X射线衍射仪对壳聚糖碳点的光学性质、化学结构、晶体结构、形貌结构等进行表征分析。结果表明，在水热温度200℃、水热时间9 h、壳聚糖质量分数2%的条件下制备得到的壳聚糖碳点量子产率为32.86%。碳点呈现出主要尺寸为3~10 nm的球形颗粒状，且在波长335 nm激发下，发射峰位于410 nm（蓝）。对金属离子的选择性研究分析表明，Fe

对碳点溶液的荧光猝灭效应最显著，说明碳点对Fe

具有较好敏感性和高选择性，且荧光猝灭效率对Fe

浓度在0~100 mol/L范围内呈现线性响应，因此有望将碳点作为荧光探针应用于Fe

的检测表征。

Abstract

In this study

carbon dots(CDs) were synthesized by hydrothermal method using chitosan(CTs) as carbon source. The influences of hydrothermal temperature

hydrothermal time and chitosan mass fraction on the fluorescence intensity of carbon dots were investigated. The optical properties

chemical structure

crystal structure

and morphology of CDs were characterized by using ultraviolet spectrophotometer(UV-vis)

fluorescence spectrophotometer

atomic force microscope(AFM)

Fourier transform infrared spectroscopy(FTIR)

X-ray photoelectron spectroscopy(XPS) and X-ray diffractometer(XRD). The results showed that the quantum yield of CDs was 32.86% at a hydrothermal temperature of 200℃

a hydrothermal time of 9 h and a chitosan mass fraction of 2%. The carbon dots show a spherical shape with a main size of 3 to 10 nm. When the carbon dots excited at a wavelength of 335 nm

the emission peak is located at 410 nm and presents blue light. The selective analysis of metal ions shows that the fluorescence quenching effect of Fe

on the CDs is the most significant

indicating that the carbon dots have good sensitivity and high selectivity for Fe

. The fluorescence quenching efficiency exhibits a linear response when Fe

concentration in the range of 0~100 mol/L

which makes it possible to use the carbon dots as a fluorescent probe for the detection and characterization of Fe

关键词

碳点壳聚糖荧光探针水热法Fe3+

Keywords

carbon dotschitosanfluorescence probehydrothermal methodFe3+

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