Adsorption behavior of Pb2+on the CdS quantum dots surface

doi:10.3969/j.issn.1000-1565.2018.02.007

Abstract

Abstract: In this paper,the mono-dispersed CdS quantum dots(QDS)were prepared in water.The fluorescence of the CdS QDs could be intensely quenched by the Pb²⁺,and the quenching effect was used to study the adsorption behavior of the Pb²⁺on the QDs’ surface.The result showed that the quenching effect was strongly influenced by the pH value and the QDs concentration,and involved the number of the Pb²⁺ adsorbed on the QDs’ surface.The adsorption behavior of the Pb²⁺ was consistent with the Langmuir isotherm equation,the relationship between the c/ΔF and c was linear,when the concentration of the Pb²⁺ was between 10^-9 and 10^-3mol/L.According to the Langmuir isotherm equation,the relationship of theΔF and c was also found to be linear at the low Pb²⁺ concentration of 1×10^-8~1×10^-9mol/L.And it was possible to determine the Pb²⁺concentration by using the line as the standard line.The detect limit was as low as 6.0×10^-10 mol/L,the RSD was 2.5%,and the recovery rate was 88.4%~107.2%.

Key words: Pb²⁺, CdS quantum dots, fluorescence, Langmuir isotherm equation

CLC Number:

ZHANG Hong,TIAN Jing,MA Gang,DU Baoan. Adsorption behavior of Pb²⁺on the CdS quantum dots surface[J]. Journal of Hebei University (Natural Science Edition), 2018, 38(2): 154-158.

References

[1] 杨惠芬.食品卫生理化检验标准手册[M].北京:中国标准出版社,1998.
[2] 翁芝莹.快速检测食品中痕量铅、镉、铜的电化学传感方法的研究[D].上海:上海交通大学,2012. WONG Z Y.The development of electrochemisry sensor methods for fast detection of lead,cadmium,copper in food[D].Shanghai: Shanghai Jiao Tong University,2012.
[3] LIU Z P.Lead poisoning combined with cadmium in sheep and horses in the vicinity of non-ferrous metal smelters[J].Sci Total Environ,2003,309(1-3):117-126.DOI: 10.1016/S0048-9697(03)00011-1.
[4] 傅明,袁智能,黄志强,等.火焰原子吸收光谱法测定茶叶中的铅[J].光谱实验室,2002,19(1):65-67. FU M,YUAN Z N,HUANG Z Q,et al.Determaination of lead in tea by FAAS[J].Chinese Journal of Spectroscopy Laboratory,2002,19(1):65-67.
[5] FISCHER E,BERG C M G V D.Anodic stripping voltammetry of lead and cadmium using a mercury film electrode and thiocyanate[J].Anal Chim Acta,1999,385(1-3):273-280.DOI:10.1016/S0003-2670(98)00582-0.
[6] SHAMS E,ABDOLLAHI H,YEKEHTAZ M,et al.H-point standard addition method in the analysis by differential pulse anodic stripping voltammetry:Simultaneous determination of lead and tin[J].Talanta,2004,63(2):359-364.DOI:10.1016/j.talanta.2003.11.003.
[7] CHAN W C,NIE S.Quantum dot bioconjugates for ultrasensitive nonisotopic detection[J].Science,1998,281(5385):2016-2018.DOI: 10.1126/science.281.5385.2016.
[8] JR M B,MORONNE M,GIN P,et al.Semiconductor nanocrystals as fluorescent biological labels[J].Science,1998,281(5385):2013-2016.DOI: 10.1126/science.281.5385.2013.
[9] MA Q,SU X.Recent advances and applications in QDs-based sensors [J].Analyst,2011,136(23):4883-4893.DOI:10.1039/c1an15741h.
[10] LI J,ZHU J J.Quantum dots for fluorescent biosensing and bio-imaging applications[J].Analyst,2013,138(9): 2506-2515.DOI:10.1039/C3AN36705C.
[11] SOMERS R C,BAWENDI M G,NOCERA D G.CdSe nanocrystal based chem-/bio- sensors[J].Chem Soc Rev,2007,36(4):579-591.DOI:10.1039/b517613c.
[12] LOU Y B,ZHAO Y X,CHEN J X,et al.Metal ions optical sensing by semiconducor quantum dots[J].Journal of Materials Chemistry C,2014,2:595-613.DOI:10.1039/C3TC31937G.
[13] RAYMO F M,YILDIZ I.Luminescent chemosensors based on semiconductor quantum dots[J].Physical Chemistry Chemical Physics,2007,9(17):2036-2043.DOI:10.1039/b616017d.
[14] MATTOUSSI H,PALUI G,NA H B.Luminescent quantum dots as platforms for probing in vitro and in vivo biological processes[J].Advanced Drug Delivery Review,2012,64(2): 138-166. DOI: 10.1016/j.addr.2011.09.011.
[15] FREEMAN R,WILLNER I.Optical molecular sensing with semiconductor quantum dots(QDs)[J].Chemical Society Reviews,2012,41(10):4067-4085.DOI:10.1039/c2cs15357b.
[16] MEDINTZ I L,UYEDA H T,GOLDMAN E R,et al.Quantum dot bioconjugates for imaging,labelling and sensing[J].Nature Materials,2005,4(6):435-446.DOI:10.1038/nmat1390.
[17] CHAN W C,MAXWELL D J,GAO X H,et al.Luminescent quantum dots for multiplexed biological detection and imaging[J].Current Opinion In Biotechnology,2002,13(13):40-46.DOI:10.1016/S0958- 1669(02)00282-3.
[18] 穆亲.量子点荧光探针的设计及检测应用[D].上海:华东理工大学,2014. MU Q.Preparation of quantum dots based fluorescence probe and their application in detection [D].Shanghai: East China University Of Science And Technology,2014.
[19] CHEN Y F,ROSENZWEIG Z.Luminescent CdS quantum dots as selective ion probes[J].Anal Chem,2002,74(19):5132-5138.DOI:10.1021/ac0258251.

Adsorption behavior of Pb²⁺on the CdS quantum dots surface

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	TANG Lianfa, WANG Qin, TANG Zhaoxin, YANG Qingqing. Optimization of fluorescence detection of extracellular enzyme activities in rhizosphere soil [J]. Journal of Hebei University(Natural Science Edition), 2022, 42(6): 642-649.
[2]	LYU Yajuan, SHI Xinrong, LI Zhiying. Determination of trace copper in water by alizarin red “switch” fluorescent probe [J]. Journal of Hebei University(Natural Science Edition), 2022, 42(2): 171-176.
[3]	DUAN Xinrui, MENG Tianjiao. Research progress in design of the organic fluorescence probes and its application for the detection of tumor biomarker [J]. Journal of Hebei University(Natural Science Edition), 2021, 41(5): 535-544.
[4]	LI Zhiying, DUAN Yaqin, ZHANG Hui, LEI Jiaxi. Preparation of carbon quantum dot fluorescence probe with prickly ash and detection of acetylcholine in milk [J]. Journal of Hebei University(Natural Science Edition), 2020, 40(6): 606-611.
[5]	LIU Yi, WANG Longlong, HU Guofeng, LIU Xuelu, WU Hongli, LI Xiaoli. Optical properties of Bi₂Se₃/MoS₂ heterojunction [J]. Journal of Hebei University (Natural Science Edition), 2020, 40(3): 249-254.
[6]	LIU Liyan, ZHANG Hongxin, HUANG Shan, LIAN Haichen, BAI Jie, HAN Yanmei, WU Suhuan. Simultaneous determination of melatonin and vitamin B6 by dual wavelength high performance liquid chromatography with fluorescence detection [J]. Journal of Hebei University (Natural Science Edition), 2019, 39(5): 491-497.
[7]	MENG Meirong, YIN Caixia. A turn-on fluorescent probe for GSH [J]. Journal of Hebei University (Natural Science Edition), 2019, 39(1): 49-55.
[8]	LIU Liyan, BAI Jie,HAN Wenya, WANG Yawen, WU Suhuan, HAN Yanmei,LIANG Cuixia. Determination of fluorescent whitening agent in mask by micellar enhanced fluorescence spectrometry [J]. Journal of Hebei University (Natural Science Edition), 2018, 38(4): 375-384.
[9]	WANG Longlong, ZHOU Wenguang, ZHANG Lianshui, LI Xiaoli, ZHOU Chuan, SHI Yafang. Effect of boron doping and phosphorus doping on temperature- dependent fluorescence spectra of silicon substrate [J]. Journal of Hebei University (Natural Science Edition), 2018, 38(4): 362-367.
[10]	YIN Caixia, XIONG Kangming, HUO Fangjun. Application of 7-hydroxylcoumarin-aldehyde in the detection of hypochlorite [J]. Journal of Hebei University (Natural Science Edition), 2018, 38(1): 28-32.
[11]	ZHOU Xiaoyu,ZHANG Jiayu,ZHOU Man,JIA Hongxia. Sensitive detection of telomerase activity based on isothermal exponetial amplification reaction [J]. Journal of Hebei University (Natural Science Edition), 2016, 36(2): 155-161.
[12]	GAO Wei,XI Ya'nan,BO Fuli,YANG Tao,GAO Baoxiang. Synthesis and characterization of water-soluble fluorescent perylene bisimides [J]. Journal of Hebei University (Natural Science Edition), 2016, 36(2): 134-140.
[13]	DU Baoan,WANG Xiaowei,WANG Yan,GAO Yachao. Adsorption of maltose on the CdS QDs surface by the fluorescence spectrum [J]. Journal of Hebei University (Natural Science Edition), 2016, 36(1): 52-57.
[14]	WANG Miaomiao, LIU Yaojun, WANG Yuan, WANG Yaohui, ZHAO Hongchi. Synthesis and characterization of 5,10,15,20-tetra[4-(2,3-epoxypropoxy)phenyl]porphyrin [J]. Journal of Hebei University (Natural Science Edition), 2015, 35(1): 48-53.
[15]	LIU Baosheng,ZHONG Baohong,LI Zhiyun,CAO Shina. Application of terbium-lomefloxacin sensitized fluorescence for the determination of norfloxacin [J]. Journal of Hebei University (Natural Science Edition), 2014, 34(5): 485-490.