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Solvent-Free Preparation of Tannic Acid Carbon Dots for Selective Detection of Ni2+ in the Environment

文献类型： 外文期刊

作者： Li, Yan 1 ; Liu, Can 3 ; Chen, Menglin 3 ; An, Yulong 3 ; Zheng, Yunwu 3 ; Tian, Hao 4 ; Shi, Rui 2 ; He, Xiahong 2 ; Lin, Xu 1 ;

作者机构： 1.Southwest Forestry Univ, Natl Joint Engn Res Ctr Highly Efficient Utilizat, Yunnan Key Lab Wood Adhes & Glued Prod, 300 Bailong Rd, Kunming 650224, Yunnan, Peoples R China

2.Southwest Forestry Univ, Key Lab Forest Resources Conservat & Utilizat Sou, Minist Educ, Kunming 650224, Yunnan, Peoples R China

3.Southwest Forestry Univ, Natl Joint Engn Res Ctr Highly Efficient Utilizat, Kunming 650224, Yunnan, Peoples R China

4.Yunnan Acad Agr Sci, Agroprod Proc Res Inst, Kunming 650000, Yunnan, Peoples R China

关键词： biomass carbon dots; solvent-free; tannic acid; Ni2+ detection

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 12 期

页码：

收录情况： SCI

摘要： Carbon dots (CDs) are widely used nanomaterials that not only exhibit good biocompatibility and photostability, but also benefit from a simple preparation process and easy functionalization, making them promising for broad applications in the fields of heavy metal ion detection and optoelectronic devices. Based on the excellent optical properties of CDs and the current situation of increasing energy shortages, this paper selects the natural polyphenolic compound tannic acid (TA) found in biomass materials as the carbon source and innovatively adopts a simple and convenient solvent-free pyrolysis method without auxiliary reagents or solvents. The CDs with good water solubility and certain fluorescence properties were directly prepared under the condition of high temperature, and the obtained CDs exhibited blue fluorescence, and a high QY of 35.4% was obtained at 300 degrees C. The analysis and results demonstrate the selectivity of these CDs for the detection of various metal ion solutions. In particular, these CDs are sensitive to Ni2+ and can be used as fluorescent sensors for the efficient and sustainable detection of Ni2+, whereas previous sensors were often specific to Fe3+ and Hg2+. Thus, a new sensing technique has been developed for the detection of Ni2+ to achieve more sensitive and rapid detection.

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