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NMT歷*的今天丨銨營(yíng)養(yǎng)與Cd脅迫關(guān)系 文章發(fā)表
NMT歷*的今天
2017年10月10日，揚(yáng)州大學(xué)王赪胤利用NMT在Sensors and Actuators B上發(fā)表了標(biāo)題為Voltammetric simultaneous ion flux measurements platform for Cu2+, Pb2+ and Hg2+ near rice root surface: Utilizing carbon nitride heterojunction film modified carbon fiber microelectrode的研究成果。
期刊：Sensors and Actuators B
主題：水稻根表面附近Cu2+，Pb2+和Hg2+的伏安同時(shí)離子通量測(cè)量平臺(tái)：利用氮化碳異質(zhì)結(jié)膜修飾的碳纖維微電極
標(biāo)題：Voltammetric simultaneous ion flux measurements platform for Cu2+, Pb2+ and Hg2+ near rice root surface: Utilizing carbon nitride heterojunction film modified carbon fiber microelectrode
影響因子：5.667
檢測(cè)指標(biāo)：Cu2+、Pb2+、Hg2+流速
作者：揚(yáng)州大學(xué)王赪胤
英文摘要
Developing an available analysis platform for simultaneous heavy metal ion flux measurement at trace level is urgent for understanding the mechanisms of phytoremediation.
Herein, oxygenous functionalized carbon nitride nanosheets assembled porous films on multi-walled carbon nanotube formed nano frameworks was firstly prepared on a carbon fiber disk microelectrode by an advanced drop-casting method. The as-prepared electrode shows low detection limit (The 1.0 × 10−13 mol L−1 for Cu2+, 1.8 × 10−11 mol L−1 for Pb2+ and 8.0 × 10−12 mol L−1 for Hg2+), acceptable linear range (6.6 × 10−12 ∼ 8.5 × 10−6 mol L−1 for Cu2+, 8.1 × 10−10 ∼ 8.5 × 10−6 mol L−1 for Pb2+ and 2.2 × 10−11 ∼ 8.5 × 10−6 mol L−1 for Hg2+) and fine selectivity in simultaneous determination. The improved accumulation ability of modifier is attributed to improved conductivity and the porous morphology of the film, which may improve useful rate of the chelation groups.
Based on the as-prepared electrode and a stepper motor, the voltammetric platform for simultaneous heavy metal ion flux measurement at trace level is fabricated for the first time. This platform can be utilized for mechanism investigation of simultaneous metal uptake on the surface of rice roots at trace level.
中文摘要（谷歌機(jī)翻）
為了了解植物修復(fù)的機(jī)理，迫切需要開(kāi)發(fā)一種可用于同時(shí)進(jìn)行痕量重金屬離子通量測(cè)量的分析平臺(tái)。
在此，首先通過(guò)*的滴鑄法在碳纖維盤微電極上制備了在多壁碳納米管形成的納米框架上組裝多孔膜的含氧官能化的氮化碳納米片。所制備的電極顯示出較低的檢測(cè)限（對(duì)于Cu2+為1.0×10-13 mol L-1，對(duì)于Pb2+為1.8×10-11 mol L-1，對(duì)于Hg2+為8.0×10-12 mol L-1），可以接受線性范圍（Cu2+為6.6×10-12?8.5×10-6 mol L-1，Pb2+為8.1×10-10?8.5×10-6 mol L-1和2.2×10-11?8.5×10-6 mol Hg2+的L-1）和同時(shí)測(cè)定的優(yōu)良選擇性。改性劑積累能力的提高歸因于膜的導(dǎo)電性和多孔形態(tài)的改善，這可以提高螯合基團(tuán)的有用率。
基于準(zhǔn)備好的電極和步進(jìn)電機(jī)，制造了用于痕量水平同時(shí)重金屬離子通量測(cè)量的伏安平臺(tái)。該平臺(tái)可用于研究水稻根部表面微量金屬同時(shí)攝取的機(jī)理。
Figure 4. (A) Photograph of the VPSIFM in determination of heavy metal ions near root surface of rice. (B) Testing positions of the voltammetric ion fluxes measurements near the root surface of the rice. Measurement of fluxes (outward positive) of Cu2+, Pb2+ and Hg2+ (error bars mean the standard error of 5 duplicate tests) across the root tips of rice, utilizing the voltammetric platform for simultaneous heavy metal ion flux measurements P-CN_T60/MWCNT/CFE. Ion flux measurement of (C) Cu2+, (D) Pb2+ and (E) Hg2+ in extracted solution at high concentration level. Ion flux measurements of (F) Cu2+,(G) Pb2+ and (H) Hg2+ in extracted solution at low concentration level. (Black and white)