Aqueous synthesis of functionalized copper sulfide quantum dots as near-infrared luminescent probes for detection of Hg2+, Ag+ and Au3+

被引：0
作者：
Weilin Du
Lei Liao
Li Yang
Aimiao Qin
Aihui Liang
机构：
[1] Key Lab New Processing Technology for Nonferrous Metals & Materials Ministry of Education,
[2] Guangxi Key Laboratory in Universities of Clean Metallurgy and Comprehensive Utilization for Non-ferrous Metals Resources,undefined
[3] College of Materials science & engineering,undefined
[4] Guilin University of Technology,undefined
[5] College of Environment science & engineering,undefined
[6] Guilin University of Technology,undefined
[7] College of Environment & Resource,undefined
[8] Guangxi Normal University,undefined
来源：
Scientific Reports | / 7卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Stable water-soluble copper sulfide(Cu2S) quantum dots(QDs) with near-infrared emission were synthesized using N-acetyl-L-cysteine(NAC) as a modifier in aqueous solution and nitrogen atmosphere at room temperature. The product was characterized by TEM, XRD, XPS, FT-IR, FL and UV-VIS spectrometers. Effects of preparation conditions such as pH values, the molar ratio of reactants, temperature, and metal ions on the fluorescence properties of Cu2S QDs were discussed. Under optimal conditions, the prepared Cu2S QDs with average diameter about 2–5 nm show a near-infrared emission at 770 nm with the excitation wavelength of 466 nm, and have a good detection sensitivity for ions of Hg2+, Ag+ and Au3+, based on the characteristic of fluorescence quenching. The fluorescence quenching mechanism was proposed via electron transfer with cation exchange, which based on the theory of Hard-Soft-Acid-Base (HSAB) and Ksp value of metal–sulfide.
引用
收藏
相关论文
共 102 条
  • [1] Mahmoud WE(2013)Synthesis, characterization and luminescence properties of thiol-capped CdSe quantum dots at different processing conditions Opt. Mater. 35 652-656
  • [2] Yaghmour SJ(2011)Cu Electrochem. Commun. 13 1376-1378
  • [3] Lin M-C(2014)S quantum dot-sensitized solar cells Chem. Soc. Rev. 43 3835-3853
  • [4] Lee M-W(2005)Plasmonic nanomaterials for biodiagnostics Anal. Chim. Acta 546 147-153
  • [5] Howes PD(2013)Functionalized cadmium sulfide quantum dots as fluorescence probe for silver ion determination Anal. Chim. Acta 785 111-118
  • [6] Rana S(2015)Characterization of L-cysteine capped CdTe quantum dots and application to test Cu(II) deficiency in biological samples from critically ill patients Chem. Commun. 51 13305-13308
  • [7] Stevens MM(2013)Ultra-thin Cu Adv. Funct. Mater. 23 1256-1264
  • [8] Chen JL(2008)S nanosheets: effective cocatalysts for photocatalytic hydrogen production Nano Lett. 8 2551-2555
  • [9] Zhu CQ(2015)Size‐controlled synthesis of Cu Nanotechnology 27 378-381
  • [10] Sáeza L(1998)E (E = S, Se) nanocrystals with strong tunable near‐infrared localized surface plasmon resonance and high conductivity in thin films J. Neurosci. 18 4042-4049
12345678910