Abstract：The water-soluble fluorescent carbon quantum dots (abbreviated as carbon dots) were synthesized by hydrothermal method with glucosamine hydrochloride as carbon source and sodium tripolyphosphate as catalyst. The effect of hydrothermal reaction temperature, catalyst amount and solution pH on fluorescence properties of carbon dots were investigated. The results showed that the carbon dots exhibited maximum fluorescence quantum yield of 12% when it was prepared under the following conditions: the hydrothermal reaction temperature was 180℃, the reaction time was 10h, and the amount of catalyst was 0.938mmol. In addition, a new method for determination of Hg2+ was established based on the significant quenching effect of Hg2+ on fluorescence intensity of carbon dots. The concentration of Hg2+ in range of 1.6×10-6-5.1×10-5 mol/L showed good linear relationship with the fluorescence quenching extent of carbon dots. The detection limit was 6.7×10-7 mol/L. The proposed method was applied for determination of Hg2+ in laboratory wastewater and domestic sewage samples. The relative standard deviations (RSD, n=6) of determination results were between 3.0% and 4.0%. The recoveries were 95%-107%.
陈宽,于淑娟,罩金凤,等.荧光碳点的快速合成及在Hg2+检测中的应用[J].化工技术与开发,2015,44(10):13-16.CHEN Kuan,YU Shu-juan,QIN Jin-feng,et al.Rapidly synthesis of fluorescent carbon dots and their application in Hg2+ detection[J].Technology & Development of Chemical Industry,2015,44(10):13-16.
[2]
杨文雨,罗凡雨,朱姗姗,等.以葡萄糖为碳源的荧光碳点构建Hg2+的检测方法[J].西南师范大学学报:自然科学版,2014,39(10):81-86.YANG Wen-yu,LUO Fan-yu,ZHU Shan-shan,et al.One novel fluorescent method for detections of Hg2+ based on carbon dots[J].Journal of Southwest China Normal University:Natural Science Edition,2014,39(10):81-86.
[3]
张瑞兴,刘舒,皮子凤,等.汞离子对细胞代谢通路影响的代谢组学[J].高等学校化学学报,2014,35(6):1146-1151.ZHANG Rui-xing,LIU Shu,PI Zi-feng,et al.Cell metabolomics study of Hg(Ⅱ) ion effect on the metabolic pathways of cells[J].Chemical Journal of Chinese Universities,2014,35(6):1146-1151.
[4]
Manzoorij J L,Sorouraddin M H,Shabani A M.Determination of mercury by cold vapour atomic absorption spectrometry after preconcentration with dithizone immobilized on surfactant-coated alumina[J].Journal of Analytical Atomic Spectrometry,1998,13(4):305-308.
[5]
Grascs F, Garcia-Sanchez F, Valcarcel M.Fluorimetric determination of copper and mercury based on their catalytic effects on the autoxidation of 2,2′-dipyridylketone hydrazone[J].Analytica Chimica Acta,1980,119(2):359-365.
[6]
梁立娜,江桂斌.高效液相色谱及其联用技术在汞形态分析中的应用[J].分析科学学报,2002,18(4):338-343.LIANG Li-na,JIANG Gui-bin.High performance liquid chromatography and related hyphenated techniques for the speciation analysis of mercury[J].Journal of Analytical Science,2002,18(4):338-343.
[7]
Eda G,Lin Y Y,Mattevi C,et al.Blue photoluminescence from chemically derived graphene oxide[J].Adv. Mater.,2010,22(4):505-509.
[8]
Wang Y,Liu X,Zhang L,et al.Microwave-assisted synthesis of carbon nanodots through an eggshell membrane and their uorescent application[J].Analyst,2012,137:5392-5397.
[9]
Zong J,Yang X,Trinchi A,et al.Carbon dots as fluorescent probes for “off-on” detection of Cu2+ and L-cysteine in aqueous solution[J].Biosens. Bioelectron.,2014,51:330-335.
[10]
Xu X,Ray R,Gu Y,et al.Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments[J].J.Am.Chem.Soc.,2004,126(40):12736-12737.
[11]
Zhou G.J,Booker C,Li R,et al.An electrochemical avenue to blue luminescent nanocrystals from multiwalled carbon nanotubes (MWCNTs)[J].J.Am.Chem.Soc.,2007,129:744-745.
[12]
Yang Z C,Wang M,Yong A M,et al.Intrinsically fluorescent carbon dots with tunable emission derived from hydrothermal treatment of glucose in the presence of monopotassium phosphate[J].Chem. Commun.,2011,47(42):11615-11617.
[13]
张筱喆,张文君,张祖星,等.掺氮高荧光碳点的一步法制备及对痕量Hg(II)离子的选择性检测[J].无机化学学报,2015,31(1):1-6.ZHANG Xiao-zhe,ZHANG Wen-jun,ZHANG Zu-xing,et al.One step preparation of N-doped carbon dots with high fluorescence yield for selective detection of mercury (II) ion[J].Chinese Journal of Inorganic Chemistry,2015,31(1):1-6.
[14]
Zhu H,Wang X,Li Y,et al.Microwave synthesis of fluorescent carbon nanoparticles with electrochemiluminescence properties[J].Chem. Commun.,2009(34):5118-5120.
[15]
张文龙,侯世澄,梁羽,等.利用豆渣一步合成水溶性碳点[J].安徽工程大学学报,2015,30(1):36-39.ZHANG Wen-long,HOU Shi-cheng,LIANG Yu,et al.One-step synthesis of water-soluble carbon dots originated from bean dregs[J].Journal of Anhui Polytechnic University,2015,30(1):36-39.
[16]
Guo Y,Li B.Carbon dots-initiated luminol chemiluminescence in the absence of added oxidant[J].Carbon,2015,82:459-469.
