ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Yuying Bao,Jingfang Ji,Jiyu Chen,Kaiquan Li,Pan Liu,Jingmin Ge,Ronghan Wei,Xiaodong Lei,Jingwei Zhang
Real-time continuous monitoring of soil salinity and alkalinity is essential for sustainable agriculture, yet the in-situ detection of carbonate ions (CO 3 2− ), a key indicator of soil alkalinity, remains a challenge. Herein, we designed a portable electrochemical sensor for the real-time continuous detection of free CO 3 2− in soil. The CuO–Cu 2 O nanowires were synthesized by in-situ oxidation and topological transformation. The nanowires exhibited excellent chemical and structural stability and resistance to alkali, which were used as sensing material. The CuO–Cu 2 O sensor exhibited excellent sensing performance over a wide temperature range (0–40 °C) and pH (pH value: 7–11), and in complex media including aqueous solutions, slurry and soil, which demonstrated that the CuO–Cu 2 O sensor possessed excellent resistance to biological interference, immunity to colloidal particle effects and high ion selectivity, highlighting its great potential for practical applications in complex environments. The sensor demonstrated a low detection limit (5.4 ppb), wide detection range (0.01−1600 ppm), high sensitivity (264.98 μA mM −1 cm −2 ), excellent selectivity, and long-term stability. Density functional theory (DFT) calculations showed that CuO–Cu 2 O heterostructure-induced electron redistribution triggered a shift of the d-band center toward the Fermi level, strengthened CO 3 2− adsorption, facilitated charge transfer, and then resulted in superior electrochemical response. Furthermore, it was integrated with ESP32 and Internet of Things (IoT) technology into a portable device for real-time monitoring of free CO 3 2− concentration in soil. This work provides a strategy for soil sensors to support precision agriculture and environmental monitoring.
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DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Chaofan Ma,Qun Yang,Huiyu Su,Huimin Yang,Xiaoxia Wang,Dawen Zeng
P-type semiconductors [copper oxide (CuO) and cuprous oxide (Cu2O)] have been widely researched as good gas sensing materials due to their unique oxygen adsorption properties. In this work, C-doped CuO/Cu2O hollow nano-octahedrons have been prepared by thermal decomposition of the Cu-based metal–organic framework ([Cu3(BTC)2]n). The CuO and Cu2O nanoparticles form nano-octahedron heterojunctions by a close packing mode. A large number of active heterojunction sites were exposed, which significantly increased the adsorbed oxygen (O2–) content. Meanwhile, doping C in the lattice of the heterojunction effectively reduces the band gap of CuO/Cu2O and promotes the chemical reaction of the target gas on the surface of the material. Density functional theory calculations indicate that the CuO/Cu2O heterojunction has strong adsorption ability for NO2. Electrochemical impedance spectroscopy further reveals that C-doped CuO/Cu2O hollow nano-octahedrons-40 min heterojunction has the best electron transport performance. The sensors have good gas sensing response (22.88–50 ppm) and selectivity to nitrogen dioxide (NO2) at room temperature (28 °C). In addition, the sensor has extremely low detection, which can detect parts per billion level NO2 (20.50% to 100 ppb). It is expected to provide a reference for the development of a room-temperature NO2 sensor.
研究领域:
材料科学
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化学
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环境科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Yao Chen,Yanyan Zhu,Yuhui Zhao,Jing Wang,Meng Li
The complexation of metals and metal compounds with organic skeletons into nanohybrid composites attracts attention in electrochemical applications due to the improved charge transfer pathways, which enhance the electrocatalytic activity. In this study, CuO, Cu 2 O, and CuS were anchored on g-C 3 N 4 sheets to construct electrochemical sensors for the detection of acetaminophen (AP). The CuX/g-C 3 N 4 nanohybrid composites were analyzed via transmission electron microscopy, infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Among the CuX/g-C 3 N 4 nanocomposites, CuS/g-C 3 N 4 displays a higher electrochemical activity. The electrochemical CuS/g-C 3 N 4 , CuO/g-C 3 N 4 , and Cu 2 O/g-C 3 N 4 sensors have wide linear ranges of 5 to 500 µM with a low detection limit (LOD) of 0.26 µM, 5 to 300 µM with a LOD of 0.32 µM, and 5 to 250 µM with a LOD of 0.47 µM, respectively. The better performance of the CuS/g-C 3 N 4 sensor is probably because of its significantly higher catalytic rate constant with respect to the oxidation of AP in electrochemical kinetics compared with those of the two other sensors, which leads to the enhanced electrocatalytic oxidation of AP. The CuX/g-C 3 N 4 -based electrochemical sensors display an excellent selectivity, repeatability, reproducibility, and stability. These features suggest that CuX/g-C 3 N 4 based electrochemical sensors can be sensitively detected of AP.
研究领域:
材料科学
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分析化学
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电化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Yangyang Li,Yongqi Wang,Dumei Ma,Chuan-Fan Ding,Yinghua Yan
Enhancing the ionization efficiency of saccharides remains a significant challenge in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Herein, novel MOF-derived erythrocyte-like CuO/Cu2O@ZnO–CN nanomaterials were designed as a MALDI matrix for various saccharides’ detection. The ZIF-8-derived ZnO framework maintained its intrinsic porosity while gaining uniformly distributed C/N-doped catalytic sites. Copper oxides integration further induced an erythrocyte-like morphology with a substantially larger surface area. The CuO/Cu2O@ZnO–CN matrix demonstrated superior performance over conventional CHCA and DHB in LDI-MS analysis of saccharides (Xyl, Glc, and Malt), featuring the advantages of excellent conductivity and stability, minimum background interference, excellent ionization efficiency, high salt and protein tolerance, and remarkable specificity. The developed method enabled accurate glucose quantification in human serum (0.5–9 mM linear range, R2 = 0.998) with a low limit of detection (LOD) of 0.28 mM via internal standardization. Good reproducibility and reliability of the method were verified by intraday (1.7–5.6%) and interday precision (2.2–8.2%) and accuracy (93.8 to 101.6%). Analysis of glucose of human serum from healthy people and diabetes patients indicated the matrix’s potential application in clinical analysis.
研究领域:
分析化学
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纳米材料
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质谱分析
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临床诊断
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传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）