Department of Chemical Engineering and Biotechnology, Electroanalysis and Bioelectrochemistry Laboratory, Taipei, 10608, Taiwan.
International Institute for Carbon-Neutral Energy Research (I2CNER), Electrochemical Energy Conversion Device, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan.
Mikrochim Acta. 2019 Jan 7;186(2):59. doi: 10.1007/s00604-018-3145-3.
A hydrothermal route is reported for the preparation of a composite consisting of sheet-like glucose-derived carbon and nickel oxide nanoparticles. The nanocomposites were prepared at different annealing temperatures and exploited as electrode materials for amperometric (i-t) determination of hydrazine (NH) and hydrogen peroxide (HO) at trace levels. The performances of the sensors were assessed by cyclic voltammetry and amperometry detection using a rotating disk electrode (RDE) technique. The modified electrode annealed at ca. 300 °C was found to exhibit the best electrocatalytic performance in terms of sensitive and selective detection of NH and HO even in the presence of interfering species. The electrode is inexpensive, robust, easy to prepare in large batches, highly stable, and has a low overpotential. HO can be sensed, best at a working voltage of typically 0.13 V vs Ag/AgCl; rotationg speed 1200 rpm) over a wide concentration range (0.01 to 3.9 µM) with a detection limit of 1.5 nM. NH can be sensed, best at a working voltage of typically 0.0 V within the concentration range from 0.5 μM to 12 mM with an excellent detection limit of 1.5 µM. Thus, this cost-effective and robust modified electrode, which may be readily prepared in large batch quantity, represents a practical platform for industrial sensing. Graphical abstract Schematic of the hydrothermal method for synthesis of carbon and nickel oxide nanoparticle composites (GCD/NiO-150, GCD/NiO-300, and GCD/NiO-450). The composite was used for the electro-oxidation of hydrazine (NH) and hydrogen peroxide (HO) by cyclic voltammetry and amperometry (i-t).
一种水热法被报道用于制备由片状葡萄糖衍生碳和氧化镍纳米粒子组成的复合材料。在不同的退火温度下制备了纳米复合材料，并将其用作安培（i-t）测定痕量肼（NH）和过氧化氢（HO）的电极材料。通过循环伏安法和安培检测（使用旋转圆盘电极（RDE）技术）评估了传感器的性能。在约 300°C 下退火的改性电极在灵敏和选择性检测 NH 和 HO 方面表现出最佳的电催化性能，即使存在干扰物质也是如此。该电极价格低廉、坚固耐用、易于大量制备、高度稳定且具有低过电势。HO 可以在工作电压通常为 0.13 V 与 Ag/AgCl 相比（旋转速度 1200 rpm）在很宽的浓度范围内（0.01 至 3.9 μM）进行检测，检测限为 1.5 nM。NH 可以在工作电压通常为 0.0 V 下在浓度范围从 0.5 μM 到 12 mM 内进行检测，具有出色的检测限 1.5 μM。因此，这种具有成本效益和稳健的改性电极，可以很容易地大量制备，代表了工业传感的实用平台。
