利用三角形纳米银制备球形纳米银，并通过 SERS 定量检测痕量钛。
Utilization of triangle nanosilver to prepare spherical nanosilver and quantitatively detect trace titanium by SERS.
机构信息
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.
出版信息
Nanoscale Res Lett. 2014 Dec 10;9(1):663. doi: 10.1186/1556-276X-9-663. eCollection 2014.
The blue triangle nanosilver (BAgNP) sol was prepared by the two reducers of NaBH4 and H2O2. Using BAgNP as the precursor, a small spherical nanosilver (AgNP) sol in yellow was synthesized by addition of suitable amounts of X (-) (X = Cl, Br, and I). The oxidization process of BAgNP to AgNP was studied in detail by resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS), laser scattering, surface plasmon resonance (SPR) absorption, and microscope techniques. It has been observed that NaCl accelerated the oxidizing BAgNP to form AgNP, and an oxidizing mechanism and quasi-nanograting Raman-scattering enhanced mechanism were developed to explain the phenomena. Using the BAgNP sol as substrate and based on the catalysis of Ti(IV) on the BrO3 (-) oxidizing safranine T (ST) molecular probe with a strong SERS peak at 1,535 cm(-1), a new catalytic SERS quantitative method was developed for the determination of 1.0 to 100 ng/mL Ti, with a detection limit of 0.4 ng/mL.
蓝色三角形纳米银 (BAgNP) 溶胶是由还原剂 NaBH4 和 H2O2 制备的。以 BAgNP 为前驱体，通过加入适量的 X(-)（X = Cl、Br 和 I），合成了黄色的小球形纳米银 (AgNP) 溶胶。通过共振瑞利散射 (RRS)、表面增强拉曼散射 (SERS)、激光散射、表面等离子体共振 (SPR) 吸收和显微镜技术详细研究了 BAgNP 到 AgNP 的氧化过程。已经观察到 NaCl 加速了 BAgNP 的氧化，形成了 AgNP，并提出了氧化机制和准纳米光栅拉曼散射增强机制来解释这一现象。利用 BAgNP 溶胶作为基底，并基于 Ti(IV)对具有强 SERS 峰（在 1,535 cm(-1)）的碱性藏红 T (ST)分子探针的 BrO3(-)氧化的催化作用，建立了一种新的用于测定 Ti 的催化 SERS 定量方法，测定范围为 1.0 至 100ng/mL，检测限为 0.4ng/mL。
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