A SERS nanocatalytic reaction and its application to quantitative analysis of trace Hg(II) with Vitoria blue B molecular probe
A SERS nanocatalytic reaction and its application to quantitative analysis of trace Hg(II) with Vitoria blue B molecular probe
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DOI：
10.1039/c4ra16110f
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发表时间：
2015-02
期刊：
影响因子：
3.9
通讯作者：
Aihui Liang;Guangyun Shang;L. Ye;G. Wen;Yanghe Luo;Qing-ye Liu;Xinghui Zhang;Zhiliang Jiang
中科院分区：
文献类型：
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作者：
Aihui Liang;Guangyun Shang;L. Ye;G. Wen;Yanghe Luo;Qing-ye Liu;Xinghui Zhang;Zhiliang Jiang
痕量汞离子可被NaH 2 PO 2还原形成纳米汞，纳米汞可催化NaH 2 PO 2还原HAuCl 4生成具有强表面增强拉曼散射（Sers）活性的金纳米粒子（AuNPs）。在添加维托里亚蓝B（VBB）作为分子探针后，它吸附在AuNP的表面上，在1612 cm-1处具有强的Sers峰。随着Hg 2+浓度的增加，Sers效应在1612 cm-1处增强，这是由于纳米催化颗粒反应产生的更多AuNP作为基底而形成。利用Sers、共振瑞利散射、吸收光谱和扫描电镜对这种新型的Sers纳米催化指示反应进行了研究。在选定的条件下，可以使用Sers定量分析3.0至150 × 10−9 mol L−1 Hg 2+，检测限为0.8 nmol L−1 Hg 2+。
Trace mercury ions can be reduced by NaH2PO2 to form nanomercury that can catalyze the NaH2PO2 reduction of HAuCl4 to produce gold nanoparticles (AuNPs) with strong surface-enhanced Raman scattering (SERS) activity. Upon the addition of Vitoria blue B (VBB) as a molecular probe, it adsorbed on the surfaces of the AuNPs with a strong SERS peak at 1612 cm−1. With an increasing concentration of Hg2+, the SERS effect enhanced at 1612 cm−1 due to the formation of more AuNPs as substrate generated from the nanocatalytic particle reaction. This new SERS nanocatalytic indicator reaction was studied by SERS, resonance Rayleigh scattering, absorption spectrophotometry and scanning electron microscopy. Under the chosen conditions, 3.0 to 150 × 10−9 mol L−1 Hg2+ can be analyzed quantitatively using SERS, with a detection limit of 0.8 nmol L−1 Hg2+.