NMT歷史上的今天丨ENVIRON EXP BOT 銨營養與Cd脅迫關系 文章發表

2017年10月10日，揚州大學王赪胤利用NMT在Sensors and Actuators B上發表了標題為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+的伏安同時離子通量測量平臺：利用氮化碳異質結膜修飾的碳纖維微電極

標題：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

檢測指標：Cu2+、Pb2+、Hg2+流速

作者：揚州大學王赪胤

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（谷歌機翻）

為了了解植物修復的機理，迫切需要開發一種可用于同時進行痕量重金屬離子通量測量的分析平臺。

在此，首先通過先進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限（對于Cu2+為1.0×10-13 mol L-1，對于Pb2+為1.8×10-11 mol L-1，對于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）和同時測定的優良選擇性。改性劑積累能力的提高歸因于膜的導電性和多孔形態的改善，這可以提高螯合基團的有用率。

基于準備好的電極和步進電機，首次制造了用于痕量水平同時重金屬離子通量測量的伏安平臺。該平臺可用于研究水稻根部表面微量金屬同時攝取的機理。

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)

文章鏈接： 

https://www.sciencedirect.com/science/article/pii/S0925400517319512?via%3Dihub#!