检测环境水体中银离子含量的新型碳基光学传感器

doi:10.3969/j.issn.1673-5854.2022.03.002

生物质化学工程 ›› 2022, Vol. 56 ›› Issue (3): 9-15.doi: 10.3969/j.issn.1673-5854.2022.03.002

检测环境水体中银离子含量的新型碳基光学传感器

胡云¹, 陈中庸², 周芯吉²^,*(), 刘美红¹, 周希¹^,²

1. 中国林业科学研究院林产化学工业研究所；生物质化学利用国家工程实验室；国家林业和草原局林产化学工程重点实验室；江苏省生物质能源与材料重点实验室，江苏南京 210042
2. 南通大学化学化工学院，江苏南通 226019

收稿日期:2021-10-21 出版日期:2022-05-30 发布日期:2022-05-21
通讯作者: 周芯吉 E-mail:zhouxi1123nju@foxmail.com
作者简介:周希，教授，研究领域：功能纳米材料；E-mail: zhouxi1123nju@foxmail.com
胡云(1987—)，女，江苏泰州人，助理研究员，博士，主要从事生物基高分子材料研究
基金资助:
中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2018GD002)

A New Carbon-based Optical Sensor for Detecting Silver Ion in Environmental Water

Yun HU¹, Zhongyong CHEN², Xinji ZHOU²^,*(), Meihong LIU¹, Xi ZHOU¹^,²

1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administraction; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
2. School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China

Received:2021-10-21 Online:2022-05-30 Published:2022-05-21
Contact: Xinji ZHOU E-mail:zhouxi1123nju@foxmail.com

摘要/Abstract

摘要：

以木质素磺酸钙为原料，通过常温下分子自组装和超声波辅助法制备木质素基碳量子点(CQDs)，探究木质素磺酸钙和NaBH₄对CQDs荧光性能的影响并优化CQDs合成条件。研究结果显示：优化后的CQDs合成条件为木质素磺酸钙质量浓度60 g/L，还原剂NaBH₄质量浓度50 g/L。利用透射电子显微镜(TEM)、红外光谱(FT-IR)、X射线光电子能谱(XPS)、紫外-可见光谱(UV-vis)和荧光光谱(FL)对CQDs的结构形貌及光学特性进行分析，结果显示：CQDs粒径小((9.5±0.5)nm)且分布均匀、无团聚现象，光学性能优异且荧光量子产率达12.4%。此外，基于CQDs探究不同银离子浓度对其荧光强度的影响，结果表明：CQDs对Ag⁺具有较好的荧光识别性和灵敏度，在0~250 μmol/L范围内CQDs荧光淬灭强度比值与Ag⁺浓度呈线性关系(R²=0.998)，检测限可达525 nmol/L。同时，CQDs荧光选择性优异且表现出较低的细胞毒性，有望在生物传感和环境检测领域展现出潜在应用价值。

关键词: 碳纳米点, 荧光性能, 检测Ag⁺

Abstract:

Lignin-based carbon quantum dots(CQDs) were prepared with calcium lignosulfonate as precursor by molecular self-assembly and ultrasound-assisted method at room temperature. The effects of calcium lignosulfonate and NaBH₄ on the fluorescence property of CQDs were studied, and the synthesis condition of CQDs was also optimized. The optimal preparation conditions were as follows: the mass concentration of calcium lignosulfonate was 60 g/L, the mass concentration of reducing agent NaBH₄ was 50 g/L. The structural morphology and optical properties of CQDs were confirmed by transmission electron microscopy(TEM), infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), UV-visible spectroscopy(UV-vis), and fluorescence spectroscopy(FL). The experimental results showed that CQDs had small particle size((9.5±0.5)nm), uniform distribution, no agglomeration phenomenon, excellent optical properties, and fluorescence quantum yield of 12.4%. In addition, CQDs were used to investigate the effect of different silver ion concentrations on the fluorescence intensity. The results showed that CQDs had good fluorescence recognition and sensitivity to Ag⁺, with a linear detection range(R²=0.998) of 0-250 μmol/L and a detection limit of 525 nmol/L. Meanwhile, CQDs fluorescence showed excellent selectivity and low cytotoxicity, which was expected to show potential application value in biosensing and environmental detection fields.

Key words: carbon nanodots, fluorescence properties, detection of Ag⁺

中图分类号:

TQ35

胡云, 陈中庸, 周芯吉, 刘美红, 周希. 检测环境水体中银离子含量的新型碳基光学传感器[J]. 生物质化学工程, 2022, 56(3): 9-15.

Yun HU, Zhongyong CHEN, Xinji ZHOU, Meihong LIU, Xi ZHOU. A New Carbon-based Optical Sensor for Detecting Silver Ion in Environmental Water[J]. Biomass Chemical Engineering, 2022, 56(3): 9-15.

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检测环境水体中银离子含量的新型碳基光学传感器

A New Carbon-based Optical Sensor for Detecting Silver Ion in Environmental Water

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