Electrochemical sensor system such as electrochemical non-enzymatic nitrate sensing sensor system useful for detection of nitrate ions in soil and water, comprises copper-based sensor as allylamine capped copper nanoparticles-functionalized carbon nanotube composite sensor
	DUTTA G; MUKHERJEE B
	2024-12-31
专利权人	INDO GERMAN SCI & TECHNOLOGY CENT (INDO-Non-standard) ; INDIAN INST TECHNOLOGY KHARAGPUR (IIKH-C)
申请日期	2024-12-31
专利号	IN202431105087-A
成果简介	NOVELTY - An electrochemical sensor system has: a copper (Cu)-based sensor as allylamine capped Cu nanoparticles-functionalized carbon nanotube (Alym-CuNPs-fCNT) composite sensor in storage stable form free of rapid aerial oxidation of copper nanoparticles. USE - Electrochemical sensor system useful for the detection of the nitrate ions in soil and water (claimed), where the sensor system is an electrochemical non-enzymatic nitrate sensing sensor system. ADVANTAGE - The Alym-CuNPs-fCNT composite on gold sputtered strip electrode provide a co-acting electron transferability of allylamine capped Cu free of rapid aerial oxidation in presence of fCNT on AuSE platform for catalytic efficiency, stability and sensitivity for nitrate ion detection including fast detection time of under 5 minutes including low limit of detection of 4.69 µM and with storage stability up to 75 days with 95% retention in current values. The sensor system enables fast, reliable analysis (less than 5 minutes) from minimally processed, non-centrifuged samples, making it highly convenient for onsite periodic monitoring of soil and water. Its miniaturized design integrates seamlessly with smartphones via a pocket potentiostat, ensuring ease of use by unskilled individuals. Farmers can utilize this device to accurately quantify nitrate levels, helping them regulate fertilizer use and prevent contamination of nearby water bodies, promoting sustainable agricultural practices and environmental protection. The sensing platform demonstrates excellent storage stability, retaining a very high percentage of its current response even after 75 days of operation. The technique involves minimal pre-processing, eliminating the need for 5 inert gases, and simplifying sample preparation significantly. Each sample analysis is completed in under 5 minutes, ensuring rapid detection and high throughput. The method avoids the use of centrifugation and heavy filtration systems, reducing equipment dependency and simplifying the workflow. The sample preparation requires only a straightforward extraction and basic filtration process, making it user-friendly and efficient. Offers a smartphone-integrated handheld miniaturized device that can be operated by unskilled persons for quantitative analysis nitrate content present in soil and water. The sensor surface modification involves a simple, single-time dropcasting of the material, eliminating the need for complex layer-by-layer assembly. The sensor strips are highly cost-effective, with a production cost of approx. INR 13-15 per strip, making them accessible and affordable. The electrodes exhibit excellent reproducibility and can be reused at least six times, enhancing cost efficiency and sustainability. The sensor demonstrates exceptional reproducibility with low relative standard deviation values (0.72% and 0.70%) and reusability for up to six cycles with different samples. This feature ensures cost efficiency and practicality, outperforming prior sensors, which often suffered from issues like fouling, drift, and limited reusability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method of fabrication of the sensing system, which involves providing Cu-based sensor in storage stable form free of rapid aerial oxidation of Cu nanoparticles, synthesizing Alym-CuNPs-fCNT composite, where allylamine acts as a capping agent to protect the Cu from aerial oxidation in conjunct with fCNT facilitating a greater electron transfer rate consequently increasing the sensitivity of the sensor; and (2) a method of detection of the nitrate ions in soil and water, which involves carrying out sample preparation for calibration including addition of 10-800 µM ion to the 1:30 diluted soil sample in 0.1 M sodium sulfate (pH=2) electrolytic medium followed by its electrochemical analysis in which reduction of nitrate ions to ammonium ions occurs at the copper catalytic surface and generating a current based sensing response, followed by matching of the real samples with co-relatable standard calibration plot of current to determine the nitrate ion levels.
IPC 分类号	B82Y-015/00 ; B82Y-030/00 ; G01N-027/12
国家	印度
专业领域	化学化工
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/13666
专题	中国科学院新疆生态与地理研究所
作者单位	1.INDO GERMAN SCI & TECHNOLOGY CENT (INDO-Non-standard) 2.INDIAN INST TECHNOLOGY KHARAGPUR (IIKH-C)
推荐引用方式 GB/T 7714	DUTTA G,MUKHERJEE B. Electrochemical sensor system such as electrochemical non-enzymatic nitrate sensing sensor system useful for detection of nitrate ions in soil and water, comprises copper-based sensor as allylamine capped copper nanoparticles-functionalized carbon nanotube composite sensor. IN202431105087-A[P]. 2024.

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