蓝光碳量子点作为荧光探针检测4-硝基苯酚和2-硝基苯酚  

Blue Emitted Carbon Dots as Fluorescent Probes for Detection of 4-nitrophenol and 2-nitrophenol

作　　者：邹宇 唐明宇 曲姚姚 张芳 柴芳[1] ZOU Yu;TANG Ming-yu;QU Yao-yao;ZHANG Fang;CHAI Fang(Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China;Beibu Gulf Institute of Marine Advanced Materials, Beihai 536015, China)

机构地区：[1]哈尔滨师范大学化学化工学院,光化学生材料与储能材料黑龙江省重点实验室,黑龙江哈尔滨150025 [2]北部湾海洋新材料研究院,广西北海536015

出　　处：《发光学报》2021年第8期1297-1306,共10页Chinese Journal of Luminescence

基　　金：北海市科技计划项目(202082024)资助。

摘　　要：硝基苯酚被视作严重的污染物,特别是对硝基苯酚(4-NP)和邻硝基苯酚(2-NP),作为制药工业的重要原料,它们在水中溶解性好、稳定性强,会对环境中的水体造成严重的威胁,因此,检测和监测水体中的4-NP和2-NP至关重要。利用水热法将巯基丁二酸作为碳源,制备出蓝色荧光碳点(MSA-CDs),在340 nm处激发,碳点在437 nm得到最佳发射,荧光量子产率为32%,荧光寿命为9.65 ns。在本研究中,蓝色荧光碳点可以作为荧光探针,对4-NP和2-NP有特殊的响应,使碳点的荧光强度发生明显的减弱,检测限分别为18.3 nmol/L和24.0 nmol/L。该碳点可以在实际水样中检测4-NP和2-NP并得到较理想的回收率,说明碳点具备更为广泛的应用优势及可能性。Nitrophenols are regarded as serious pollutants,especially 2-nitrophenol(2-NP)and 4-nitrophenol(4-NP),deriving from processing and manufacturing as well as being used as raw materials for pharmaceutical industry.They have been proved as a crucial threat to environmental waters due to their good solubility,strong stability,high toxicity,and carcinogenicity.Blue fluorescent carbon dots(MSA-CDs)have been prepared by hydrothermal method using mercaptosuccinic acid as carbon resource.The CDs emitted blue fluorescence emission at 437 nm excited at 340 nm,with quantum yield(QY)of 32%.In this work,the CDs exhibited specific responses to 4-NP and 2-NP.CDs can be used as a fluorescent probe,and showed clear fluorescence quenching in presence of 4-NP and 2-NP with the detection limits of 4-NP and 2-NP at 18.3 nmol/L and 24.0 nmol/L,respectively.The CDs can be used to recognize 4-NP and 2-NP in actual water with high recovery,which indicates that the CDs exhibit more extensive application advantages and possibilities.

关 键 词：蓝色碳点 荧光 检测 硝基苯酚 

分 类 号：O482.31[理学—固体物理] O657.3[理学—物理]