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首页> 外文会议>Meeting of the Electrochemical Society;International Meeting on Chemical Sensors >Fabrication of Nanostructured Electrochemical Sensor Based on Gold Nanoparticles Thin Film Modified FTO Electrode for Detection of Arsenic in Aqueous Media
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Fabrication of Nanostructured Electrochemical Sensor Based on Gold Nanoparticles Thin Film Modified FTO Electrode for Detection of Arsenic in Aqueous Media

机译：基于金纳米颗粒薄膜改性FTO电极的纳米结构电化学传感器的制备检测砷中的含水介质

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Although arsenic is naturally present in the environment, 99% of human exposure to arsenic is through ingestion. Throughout history, arsenic is known as "the king of poisons"; it is mutagenic, carcinogenic, and teratogenic. Even in smaller concentrations, it accumulates in the body and takes decades before any physical symptoms of arsenic poisoning show. According to the World Health Organization (WHO), the safe concentration of arsenic in drinking water is 10 μg/L. However, this limit is often ignored until it is decades too late, and people begin showing symptoms of having been poisoned. This is the current situation for Vietnam, whose legal arsenic concentration limit is 50 μg/L, five times higher than the WHO guidelines. Groundwater in Vietnam was already naturally high in arsenic due to arsenic-rich soils releasing arsenic into groundwater. Then, in the past half-century, with the use of arsenic-laden herbicides dispersed during Vietnam. This work aimed to fabricate a gold nanoparticles (AuNPs) electrochemical sensor on the surface of the conductive glass (FTO), which can detect the tiny concentration of arsenic. The AuNPs electrochemical sensors (Au thin films) are prepared on the surface of FTO following three methods: (i) electro-deposition, (ii) electrophoresis, and (iii) screen-printing. All methods allow the control of size and shape (nanorod, nano-star, branched-shape, quasi-spherical shape, spherical shape) of AuNPs that benefit the limit of detection (LOD).
机译：虽然砷自然存在于环境中，但砷的99％是通过摄取的砷接触。历史历史，砷被称为“毒药之王”;它是致突变性的，致癌和致畸性。即使浓度较小，它也会积聚在身体中，并且在砷中毒展的任何身体症状之前花了几十年。根据世界卫生组织（世卫组织），饮用水中砷的安全浓度为10μg/升。然而，这一限制通常被忽略，直到数十年来，人们开始显示出毒害的症状。这是越南的现状，其合法的砷浓度限制为50微克/升，比世卫组织指南高五倍。由于富有砷的土壤释放到地下水，越南地区在越南的地下水已经自然高。然后，在过去的半个世纪中，在越南期间使用了砷的载带除草剂。这项工作旨在在导电玻璃（FTO）的表面上制造金纳米颗粒（AUNP）电化学传感器，其可以检测砷的微小浓度。在FTO的表面上制备AUNPS电化学传感器（AU薄膜）以下三种方法：（i）电沉积，（ii）电泳，（iii）丝网印刷。所有方法都允许控制益处的尺寸和形状（纳米棒，纳米星，分枝形，准圆形，球形），其有利于检测极限（LOD）。

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