A surface enhanced Raman scattering quantitative analytical platform for detection of trace Cu coupled the catalytic reaction and gold nanoparticle aggregation with label-free Victoria blue B molecular probe.
With development of economy and society, there is an urgent need to develop convenient and sensitive methods for detection of Cu2+pollution in water. In this article, a simple and sensitive SERS sensor was proposed to quantitative analysis of trace Cu2+in water. The SERS sensor platform was prepared a common gold nanoparticle (AuNP)-SiO2sol substrate platform by adsorbing HSA, coupling with the catalytic reaction of Cu2+-ascorbic acid (H2A)-dissolved oxygen, and using label-free Victoria blue B (VBB) as SERS molecular probes. The SERS sensor platform response to the AuNP aggregations by hydroxyl radicals (•OH) oxidizing from the Cu2+catalytic reaction, which caused the SERS signal enhancement. Therefore, by monitoring the increase of SERS signal, Cu2+in water can be determined accurately. The results show that the SERS sensor platforms owns a linear response with a range from 0.025 to 25μmol/L Cu2+, and with a detection limit of 0.008μmol/L. In addition, the SERS method demonstrated good specificity for Cu2+, which can determined accurately trace Cu2+in water samples, and good recovery and accuracy are obtained for the water samples. With its high selectivity and good accuracy, the sensitive SERS quantitative analysis method is expected to be a promising candidate for determining copper ions in environmental monitoring and food safety.
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China.
Chongning
C
Li
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China.
Huixiang
H
Ouyang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China.
Xueping
X
Tang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China.
Guiqing
G
Wen
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China. Electronic address: ahliang2008@163.com.
Aihui
A
Liang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China. Electronic address: zljiang@mailbox.gxnu.edu.cn.
Zhiliang
Z
Jiang
D000818:Animals; D001205:Ascorbic Acid / Q000737:chemistry; D015374:Biosensing Techniques / Q000379:methods; D002384:Catalysis; D002413:Cations, Divalent / Q000032:analysis; D002417:Cattle; D003300:Copper / Q000032:analysis*; D004247:DNA / Q000737:chemistry; D060766:Drinking Water / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D006801:Humans; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012394:Rosaniline Dyes / Q000737:chemistry*; D012709:Serum Albumin / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D002413:Cations, Divalent; D060766:Drinking Water; D012394:Rosaniline Dyes; D012709:Serum Albumin; D014874:Water Pollutants, Chemical; D012710:Serum Albumin, Bovine; D006046:Gold; D012822:Silicon Dioxide; D003300:Copper; D004247:DNA; D001205:Ascorbic Acid; C009662:Victoria blue B
AuNPs; Catalytic reaction; Cu(2+); RRS; SERS