基于MoS₂量子点荧光内滤作用测定环境水样中对硝基苯酚  

Determination of p-Nitrophenol in Environmental Water Samples Based on MoS2 Quantum Dots by Fluorescence Inner Filter Effect

作　　者：宁可可 向国强[1] 乔晓红 王鑫 王琪 肖温洁 柳金枝 张兰兰 

机构地区：[1]河南工业大学化学化工学院,河南郑州

出　　处：《分析化学进展》2019年第3期168-174,共7页Advances in Analytical Chemistry

摘　　要：以钼酸钠和L-半胱氨酸为原料,聚(4-苯乙烯磺酸钠)为修饰剂,通过一步水热反应法成功制备了二硫化钼量子点(MoS2 QDs)。所制备的MoS2 QDs在390 nm处有较强荧光发射(激发波长300 nm),由于在碱性条件下,对硝基苯酚(p-NP)在390 nm处有明显吸收峰,因此p-NP对MoS2 QDs荧光具有较强内滤作用(IFE),基于这种内滤作用建立了p-NP的分析新方法。该方法检出限(3σ)为0.13 μM,相对标准偏差RSD为1.2% (c = 15 μM, n = 11)。线性范围为1~20 μM。该方法成功应用于环境水样中p-NP的测定。Molybdenum disulfide quantum dots(MoS2 QDs)were successfully prepared by one-step hydro-thermal reaction using sodium molybdate and L-cysteine as raw materials and poly(4-styrenesul-fonate)as a modifier.The prepared MoS2QDs have a strong fluorescence emission at 390 nm(ex-citation wavelength is 300 nm);p-NP is observed at 390 nm under alkaline conditions.Therefore,p-NP has a strong inner filter effect(IFE)on the fluorescence of MoS2 QD and a new analytical method for p-NP is established based on this IFE.The detection limit(3σ)of this method was 0.13μM,and the relative standard deviation RSD is 1.2%(c=15μM,n=11).The linear range is 1-20μM.This method is successfully applied to the determination of p-NP in environmental water samples.

关 键 词：二硫化钼量子点 对硝基苯酚 内滤作用 

分 类 号：O65[理学—分析化学]