Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres

Qiaozhi He, Qian Zhang, Wenwu Cao, Ting Yin, S. Zhao, Xiaoqia Yin, Hui Zhao, Wei Tao

Research output: Contribution to journalArticle

Abstract

A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg2+) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg2+ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg2+ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg2+ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg2+ trace in water with very high sensitivity.

Original languageEnglish (US)
Article number104058
JournalMicrochemical Journal
Volume150
DOIs
StatePublished - Nov 1 2019

Fingerprint

Photoacoustic effect
Nanospheres
Mercury
Gold
Ions
Water
Metal ions
Alkaline Earth Metals
Light extinction
Alkalies
Heavy Metals
Heavy ions
Agglomeration
Costs

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy

Cite this

He, Qiaozhi ; Zhang, Qian ; Cao, Wenwu ; Yin, Ting ; Zhao, S. ; Yin, Xiaoqia ; Zhao, Hui ; Tao, Wei. / Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres. In: Microchemical Journal. 2019 ; Vol. 150.
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abstract = "A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg2+) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg2+ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg2+ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg2+ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg2+ trace in water with very high sensitivity.",
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Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres. / He, Qiaozhi; Zhang, Qian; Cao, Wenwu; Yin, Ting; Zhao, S.; Yin, Xiaoqia; Zhao, Hui; Tao, Wei.

In: Microchemical Journal, Vol. 150, 104058, 01.11.2019.

Research output: Contribution to journalArticle

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AU - Yin, Xiaoqia

AU - Zhao, Hui

AU - Tao, Wei

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