NMT历史上的今天丨ENVIRON EXP BOT 铵营养与Cd胁迫关系 文章发表

2017年10月10日，扬州大学王赪胤利用NMT在Sensors and Actuators B上发表了标题为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

主题：水稻根表面附近Cu2+，Pb2+和Hg2+的伏安同时离子通量测量平台：利用氮化碳异质结膜修饰的碳纤维微电极

标题：Voltammetric simultaneous ion flux measurements  platform for Cu2+, Pb2+ and Hg2+ near rice root surface: Utilizing  carbon nitride heterojunction film modified carbon fiber microelectrode

影响因子：5.667

检测指标：Cu2+、Pb2+、Hg2+流速

作者：扬州大学王赪胤

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（谷歌机翻）

为了了解植物修复的机理，迫切需要开发一种可用于同时进行痕量重金属离子通量测量的分析平台。

在此，首先通过先进的滴铸法在碳纤维盘微电极上制备了在多壁碳纳米管形成的纳米框架上组装多孔膜的含氧官能化的氮化碳纳米片。所制备的电极显示出较低的检测限（对于Cu2+为1.0×10-13  mol L-1，对于Pb2+为1.8×10-11 mol L-1，对于Hg2+为8.0×10-12 mol  L-1），可以接受线性范围（Cu2+为6.6×10-12〜8.5×10-6 mol L-1，Pb2+为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）和同时测定的优良选择性。改性剂积累能力的提高归因于膜的导电性和多孔形态的改善，这可以提高螯合基团的有用率。

基于准备好的电极和步进电机，首次制造了用于痕量水平同时重金属离子通量测量的伏安平台。该平台可用于研究水稻根部表面微量金属同时摄取的机理。

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)