CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Junming Zhang,Yingyi Ma,Yuhang Han,Kaizheng Xu,Shun Yao,Lei Shi,Min Zhu
Restacking or aggregation inhibition of MXene nanosheets is crucial to the maintenance of their excellent electrochemical performance during use. In this study, a positively charged surfactant is inserted into the MXene nanolayers through a simple self-assembly process based on electrostatic interaction, producing a MXene/surfactant complex with enlarged interlayer spacing. Then 3D MXene-based porous structure could be prepared by the facile and low-cost breath figure method, in which MXene/surfactant complex is used as a casting material, therefore the inhibition of restacking or aggregation and increase of surface area at multiscale are realized in one system at the same time. Benefiting from the high conductivity of MXene and increased surface area of 3D porous structure that can provide massive active sites and facilitate the electrolyte infiltration and ion or electron access, enhanced electrochemical performance, for instance, electrochemical sensing of dopamine (DA) is shown. A low detection limit of 36.8 nM with excellent anti-interference, reproducibility, repeatability and long-term stability is realized. Good accuracy for DA detection in real biological samples is also confirmed by determining DA concentration in complex human urine samples. More importantly, porous structure such as pore size, uniformity, order and porosity can be adjusted through tuning the fabrication conditions, thereby regulating its electrochemical properties. This work not only provides a high-performance electrode for electrochemical sensing, but also offers a simple and practical strategy for the construction of 3D porous MXene film that holds great potential in electromagnetic interference shielding, supercapacitors and batteries.
研究领域:
材料科学
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电化学
·
生物医学工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chenhui Yan,Bowen Zhang,Yansong Liu,Zhibing He
There are strong radiological hazards and the risk of direct cell damage in living organisms for radioactive iodate (131IO3–/129IO3–). Thus, it is essential to capture and remove them. In the contribution, the micro flower-like Bi2S3 (MF-Bi2S3) was prepared via a hydrothermal method to investigate its adsorption behavior toward IO3–. MF-Bi2S3 exhibits the maximum adsorption capacity of 875.6 mg/g for IO3– at pH ≈ 3, and the adsorbent achieves a removal efficiency of 98.98% within 2 h. Furthermore, the removal efficiency of MF-Bi2S3 can still reach 96.37% at high concentrations of coexisting anions such as Cl–, SO42–, NO3–, and CO32–, demonstrating excellent anti-interference performance. In simulated artificial groundwater, the adsorbent achieves a removal rate of 88.8% for IO3–, suggesting its potential to solve the problem of IO3– in actual wastewater. Notably, the adsorbed products change depending on iodine content, with BiI3O9 and BiOI as the intermediate products, and the final product is BiOIO3. X-ray photoelectron spectroscopy detects the presence of I2 and I3– in the product, which is attributed to the reduction and fixed to iodine by S2–. Meanwhile, the corresponding S2– becomes SO42– and remains in the liquid after the reaction. This work provides a breakthrough solution for effectively removing IO3–.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ruizhi Yu,Zejun Deng,P.E. Sharel,Lingcong Meng,Run Wang,Yijia Wang,Haichao Li,Xiang Wang,Kechao Zhou,Li Ma,Quiping Wei
Boron-doped diamond (BDD) microsensors feature exceptional advantages such as long-term stability, excellent antifouling properties, and ultra-low background currents, considered the ideal biosensors for non-enzymatic quantification of analytes. Herein, we reported, for the first time, the use of dual BDD electrode metallic BDD films on BDD microparticles) for enzyme-free detection of uric acid in complicated sweat environments. The BDDME with a dimension of 450 μm exhibited a fast electron transfer kinetic constant of 1.68 × 10 −2 cm s −1 towards K 3 [Fe (CN) 6 ] and K 4 [Fe (CN) 6 ] and a large electrochemically active surface area of 0.13 mm 2 , larger than the real geometric surface area. The voltammetric response currents of uric acid in sweat environments followed a good linear relation with increasing concentrations in the range of 5 μM - 500 μM, along with a detection sensitivity of 16.02 μA μM −1 cm −2 and a detection limit of 0.77 μM. In addition, the BDDME is capable of achieving highly specific quantification of uric acid in the presence of diverse interference agents such as glucose, urea, and tyrosine. In addition, the BDDME showed long-term stability with 4.6 % fluctuations in the response current during repetitive tests for 360 days and could be fully activated by rinsing with water despite the possible adsorption fouling of urine and bovine serum albumin during tests. This work demonstrated the feasibility of long-term detection of sweat uric acid using a non-enzymatic way and provides a solution for the long-term management of gout and other diseases.
研究领域:
生物传感器技术
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医学检测
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Chen Silu,Lu Songhua,Ma Jianfeng
The incorporation of semiconductor materials on Fe 3 O 4 has been demonstrated as an efficient way to promote the photocatalytic activity of Fe 3 O 4 . Therefore, we synthesized Fe 3 O 4 @In 2 S 3 composite by growing ultrathin In 2 S 3 nanosheets on the surface of Fe 3 O 4 using a simple one-pot water bath heating method. Fe 3 O 4 @In 2 S 3 exhibited high adsorption and photoreduction capacities for Cr(VI) under wide pH, as well as excellent magnetic separation property. Meanwhile, the adsorption and reduction ability of Fe 3 O 4 @In 2 S 3 towards Cr(VI) maintained high level in low-valent anions system, while it significantly declined with existence of high-valent anion (PO 4 3− ). A sharp contrast between the two situations manifested that the Fe 3 O 4 @In 2 S 3 has strong anti-interference in low-valent anions system. Furthermore, cyclic experiments revealed the admirable photocatalytic activity and reusability of Fe 3 O 4 @In 2 S 3 . According to the results of adsorption and cyclic experiments, a distinctly enhanced proportion of Cr on surface of Fe 3 O 4 @In 2 S 3 in the first cycle experiment was observed, which indicated that the photocatalytic reduction of Cr(VI) probably promoted the immobilization of Cr species on Fe 3 O 4 @In 2 S 3 . XPS analysis results suggested that the Cr(VI) loaded on Fe 3 O 4 @In 2 S 3 mostly reduced to Cr(III) via photocatalytic reduction process with In 2 S 3 , and Fe 3 O 4 partly contributed to its reduction. Finally, the enhanced adsorption and reduction capacity of Fe 3 O 4 @In 2 S 3 for Cr(VI) and its easy recycling feature make it has great application potential in Cr(VI) wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Sitian Zhao,Long Chen,Wenjie Luo,Zijie Pi,Xin Zhang,Rongqin Yang,Xiaoling Yang,Yuanyuan Zhang,Xiaoling Liao
Hydrogen peroxide (H 2 O 2 ) is widely distributed in living organisms and the environment, and its concentration is closely associated with human health. Therefore, the development of an efficient and sensitive detection method for H 2 O 2 is imperative. In this study, a PtPd nano-enzyme composite was electrodeposited onto a platinum wire microelectrode (ME) using a one-step electrochemical deposition method to fabricate an H 2 O 2 electrochemical sensor (PtPd/ME) with exceptional performance. The successful modification of PtPd on the electrode surface was confirmed by scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). Chronoamperometry (i-t) was employed to investigate various technical parameters including sensitivity, detection limit, detection range, reproducibility, and anti-interference capability. The results demonstrate that the sensor exhibits a sensitivity of 11.94 mA M -1 cm -2 with a detection limit of 0.034 μM and a wide linear range from 31.25 μM to 4.15 mM while also demonstrating excellent anti-interference properties. These superior performances can be attributed to the strong catalytic activity towards H 2 O 2 provided by PtPd nanoparticles as well as the fast electron transfer rate facilitated by microelectrodes. Furthermore, this sensor effectively enables real-time monitoring of H 2 O 2 released by ascorbic acid-stimulated vascular endothelial cells and demonstrates its potential for detecting H 2 O 2 in contact lens care solutions. These findings provide valuable insights for food and drug testing, and demonstrate great potential for monitoring key pathological processes within living cells.
研究领域:
生物化学
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分析化学
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hong-Wei Lv,Quan-Fu Li,Hui-Ling Peng
Sodium tetrafluorocuprate (Na 2 CuF 4 ) has been synthesized by the precipitation method. Then, Na 2 CuF 4 was applied to glucose electrocatalysis for the first time, and modified bare Au electrode to obtain Na 2 CuF 4 /Au. Na 2 CuF 4 /Au has strong anti-interference, extremely broad linear range of glucose detection, and great stability through stored for a long time at room temperature. A simple method was used to prepare Na 2 CuF 4 with different morphologies, and the effects of different morphologies for the glucose sensing performance were studied. The optimal experimental parameters of glucose sensing were obtained through parameter optimization, which leads to enhanced glucose sensing performance. The selected Na 2 CuF 4 was composed of large crystals and smaller crystals. The larger crystals sizes of selected Na 2 CuF 4 are in the range from 5 μm to 6 μm, and the smaller are in the range from 230 nm to 300 nm, the two are mixed together. The Na 2 CuF 4 /Au electrode showed high sensitivity and very wide linear range (the first 0.01-0.15 mM, the second 0.15-19.15 mM, the third 19.15-63.15 mM). The Na 2 CuF 4 /Au shows good accuracy, reproducibility and stability, as well as excellent selectivity. The properties of Na 2 CuF 4 indicate that it has a wide application prospect in the field of glucose electrocatalysis as a new glucose sensitive material.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 8
·087517
·
IF 3.3
Jinyuan Li,Meng Lin,Xingcen Liu
Tannic acid contains a high density of catechol groups, which enable strong interactions with metal ions for the formation of adhesive assembly films. The metal-polyphenol structure formed by tannic acid with metal ions has the advantages of green environmental protection and strong adhesion. In this work, a tannic acid-iron film modified electrode was prepared by a one-step self-assembly method in which ferric chloride hexahydrate and tannic acid were used as reactants. Ultraviolet-visible absorption spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and infrared spectroscopy were used to characterize the structure and morphology of the tannic acid-iron films. Differential pulse voltammetry was used to evaluate the electrochemical sensing performance of the tannic acid-iron film modified electrode towards dopamine. In the range of 450 μM-4 mM, the response current of the modified electrode has a good linear relationship with the dopamine concentration. An anti-interference test of the modified electrode was performed in an electrolyte containing ascorbic acid and uric acid. The electrode has good anti-interference performance. The successful construction of this sensor provides new insights into the research and design of dopamine electrochemical sensors.
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产品关联
DOI
高影响因子
Sensor Letters
·
2016
·Vol. 14
·期 9
·859-863
·
IF 0
Ding Yu,Li Yibin,Wu Huimin,Wang Shengfu,Xia Qinghua
20 wt% PtFe/C catalysts were prepared by a chemical reduction method at high temperature. The catalysts were characterized by X-ray diffraction, transmission electron microscopy, and electrochemical testing. The sensor based on PtFe/C showed a detection limit of 0.03 mM and high
sensitivity with linear range from 0.1 mM to 13.5 mM. The sensor still had high selection for glucose in the presence of commonly interfering species, such as ascorbic acid, acetamidophenol, and uric acid. The as-prepared glucose sensor has good anti-interference performance.
研究领域:
材料科学
·
电化学
·
生物传感
✓ 已验证
DOI
FOOD CHEMISTRY
·
2025
·
IF 9.8
Huili Luo,Yilu Huang,Yuhang Xiang,Ying Zhou,Jia Zhao,Lijuan Chen
Electrochemical detection has been used to measure heavy metals in food, but matrix interferences remain limited the rapid treatment-detection. This study developed a Nafion-Bi 2 O 3 coating modified graphite paper/sodium alginate gel electrode to amplify the electrical signal of Pb(II) and improve the anti-interference towards organic acids and metal ions. Although negatively charged organic acids were excluded by Nafion, interferences of exchangeable ions were amplified. In the mix drip coating, Bi 2 O 3 was chemical combined and electrostatic interacted with OH, SO 3 − and C-S in Nafion. This modification reduced diffusion resistance, enhanced surface hydrophobicity and provided additional reactive oxygen binding sites. The peak current of Pb(II) increased 56.62 % and the detection limit was lowered to 0.015 μg/L. The recoveries of Pb in matrices were 78.33 %–106.45 %. The easy field modified graphite paper electrode represents an innovation, and this study will propel the rapid detection of heavy metals based on acid-extraction.
研究领域:
分析化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Haifeng Zhang,Zhaoxin Li,Shengtian Sang,Liang Yin
As the number of people with diabetes continues to increase, the use of high-performing blood glucose testing devices for blood glucose management is critical. Therefore, a flexible micronedle sensor (MNs sensor) based on flexible micronedle array structure (MNs array) is proposed in this study, inspired by the ultra-fast water absorption characteristics of straw, which can be used to quickly, conveniently and noninvasculatively detect glucose concentration in human interstitium fluid (ISF). The MNs sensor is the composite of flexible MNs array and highly sensitive detection electrode. The MNs sensor has excellent mechanical properties, the maximum pressure is 69.2 N (4 times the average), the compressive strength is 88.13 MPa (1.88 times the average), and the fracture compression ratio is 194.7 %(3.36 times the average). These properties enable MN sensors to penetrate the stratum corneum in complete form while extracting ISF quickly and consistently. Meanwhile, the MN sensor has the highly sensitivity (1826.75nA mM −1 cm −2 , 4.72 times the average value). It has a wider detection range (1 mM-30 mM) and faster detection (30 s) than existing MN glucose detectors. In addition, the MN sensor has excellent anti-interference performance and can accurately detect glucose concentration in the case of multiple disturbances. This work lays a foundation for the development of a new painless, real-time monitoring and high accuracy blood glucose detection system.
研究领域:
生物医学工程
·
糖尿病研究
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
LAB ON A CHIP
·
2018
·Vol. 18
·期 19
·2994-3002
·
IF 5.995
Y. Shi,H. L. Liu,X. Q. Zhu,J. M. Zhu,Y. F. Zuo,Y. Yang,F. H. Jiang,C. J. Sun,W. H. Zhao,X. T. Han
Nitrite detection plays a very important role in environmental monitoring and for industrial purposes. The commonly used colorimetric analysis requires the measurement of a system's calibration curve by asynchronously preparing and detecting a dozen standard samples, leading to time-consuming, slow and cumbersome procedures. Here, we present a differential colorimetry method that determines the nitrite level based on the paired chromaticity gradient, formed by coupling the colour reaction into the microfluidic network. The two gradients reshape each other and contain enough information for the quantitative analysis of the sample being tested, without the need for a calibration curve. The independence of the two gradients of the absorbance change caused by the detecting system and water quality results in a high stability and anti-interference performance, with the assistance of its self-correcting ability. This differential colorimetry method requires little time and energy consumption as only one sample is needed. Standard nitrite solutions of 0.50 mM and 0.33 mM have been determined with an error of 1.16% and 0.50%, respectively. These measurements are advantageous in terms of greater stability by up to 10 times and accuracy by 6 times, compared with the calibration curve approaches. It is foreseeable that this differential colorimetry method will find a wide range of applications in the field of chemical detection.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Wei Liu,Honghuang Li,Deming Li,Xiaoting Liu,Lei Liu,Zhiyong Zhu,Haoyu Hao,Qiongyao Zeng,Yanhua Sun
In this work, MWCNTs/Ti3C2 nanocomposites have been synthesized by a convenient method and characterized in terms of structure and properties by SEM, FT-IR, XPS and electrochemical methods. The electrochemical sensor developed by MWCNTs/Ti3C2 nanocomposites has good electrochemical properties. The sensor has good electrocatalytic performance for H2O2 and was used to detect the concentration of H2O2. The sublinear range of detection was 0.05-1080 μM and the detection limit was 0.017 μM (S/N=3). The sensor has strong anti-interference performance, stability and reproducibility, and has shown good performance in real sample detection.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 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）