CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xuehua Chen,Chao Qin,Zicheng Zheng,Hanwen Chi,Zhizhen Ye,Liping Zhu
Gas sensors with good repeatability and controllable fabrication method are extremely desired for practical applications. Co-MOF-derived Co 3 O 4 is a promising gas-sensing material candidate because of its large surface area, ultrahigh porosities, and abundant oxygen defects. However, the advantages of Co-MOF precursor were limited by the traditional sensor fabrication methods. Moreover, the high resistance and poor surface activity of Co 3 O 4 resulted in low gas-sensing performance at room temperature (RT). To overcome these challenges, in-situ sensors based on Co 3 O 4 porous films with controlled nanoscale thickness were directly prepared on ceramic substrates by using Co-MOF films as precursors. To further improve the conductivity, SnO 2 catalytic overlayers were introduced on top of Co 3 O 4 sensors to construct SnO 2 /Co 3 O 4 bilayer sensors, which were promising for triethylamine (TEA) detection at RT. As a result, the optimized SnO 2 /Co 3 O 4 sensor exhibited a fast response/recovery rate (11 s/16 s), high selectivity, and a satisfactory sensitivity (150%) to TEA at RT. The enhanced gas-sensing performance could be attributed to the unique bilayer structures, improved conductivity, and synergistic effects of the SnO 2 catalytic overlayers and Co 3 O 4 sensing layers.
研究领域:
材料科学
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化学传感器
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纳米技术
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产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 8
·2643-2648
·
IF 4.019
Yao Tang,Juntao Xu,Chengyi Xiong,Yan Xiao,Xiuhua Zhang,Shengfu Wang
Gold nanoclusters (Au NCs) are a type of emerging ECL emitter with molecule-like properties and low toxicity that hold great potential for sensing application. However, the application of Au NCs in ECL sensing is still limited due to their low ECL efficiency. In this work, we provided an effective way to enhance the ECL efficiency of Au NCs. By doping Ag on GSH-protected Au NCs to form bimetallic clusters (GSH-Ag/Au NCs), the ECL efficiency of Au NCs was greatly improved. Based on the enhanced ECL signal of Au NCs, an ultrasensitive ECL sensor was constructed for the detection of dopamine (DA). DA exhibited a prominent ECL quenching effect towards the formed bimetallic GSH-Ag/Au NCs which can be used for DA detection. The proposed ECL sensor exhibited excellent sensitivity, selectivity and stability and had a wide linear range from 10 nM to 1 mM with a low detection limit of 2.3 nM (S/N = 3). More importantly, this work provided a potential method to improve the ECL properties of Au NCs and widen their analytical application.
研究领域:
分析化学
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生物传感
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Wei Sun,Xiuzheng Wang,Yuhua Wang,Xiaomei Ju,Li Xu,Guangjiu Li,Zhenfan Sun
In this paper a nanocomposite prepared by graphene (GR) and SnO 2 nanosheets was used to modify a N-hexylpyridinium hexafluorophosphate based carbon ionic liquid electrode. The presence of GR–SnO 2 nanocomposite on the electrode surface exhibited synergistic effects to improve the electrochemical performance of the modified electrode . Electrochemical behaviors of dopamine (DA) on the electrode were evaluated by cyclic voltammetry and differential pulse voltammetry . The results indicated that the GR–SnO 2 nanocomposite modified electrode displayed high electrocatalytic activity to the oxidation of DA with the increase of the redox peak currents and the decrease of the peak-to-peak separation. Under the selected conditions the oxidation peak current was proportional to the DA concentration in the range from 0.5 to 500.0 μmol/L with a detection limit of 0.13 μmol/L (S/N = 3). The modified electrode showed excellent selectivity and sensitivity even in the presence of high concentration of uric acid . The proposed method was applied to determine DA content in real samples with satisfactory results.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2014
·
IF 2.291
Tianshu Chu,Huiping Liu,Yangyi Yang,Hongming Wang,Yunsong Hu,Yi Wang,Minghao Yu,Seik Weng Ng
A strong green-light-emitting Tb complex [Tb 2 (csal) 6 (H 2 O) 4 ]·4H 2 O ( 1 ) (Hcsal = 4-chlorosalicylicacid) has been synthesized. The structure was determined by single crystal X-ray diffraction. 1 exhibits a discrete dinuclear structure which is further assembled into a 3D supramolecular network by hydrogen bonding and aromatic π−π stacking interactions. This complex was used to detect ethylenediamine (EDA), triethylamine (TEA) and ethanolamine (EOA), the relationship between luminescence intense of 1 and concentrate of EDA or TEA can be fitted in Stern–Volmer equation. The results indicate that 1 is a promising probe for detecting amines with high selectivity and sensitivity.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xinmeng Zhang,Yakun Li,Wanyin Ge
Dopamine (DA) is a small biological molecule that causes a variety of diseases when its concentration is abnormal. Therefore, highly sensitive detection of DA is very important for the development of biomedicine and monitoring of human health. Herein, we prepared a carbon cloth (CC)/Ti3C2Tx/NiCoP composite as a highly sensitive electrochemical sensor for DA detection. Porous NiCoP was grown on the surface of CC and Ti3C2Tx by hydrothermal and phosphating treatments. The composite integrated the advantages of large specific surface area of zero-dimensional NiCoP quantum dots, rich electrochemical active sites of one-dimensional porous NiCoP nanowires, hydrophilicity of two-dimensional Ti3C2Tx nanosheets, and high conductivity of three-dimensional CC substrates. The sensor has high sensitivity (31.4101 μA μM–1 cm–2), wide detection range (0.17–784.55 μM), low detection limit (0.18 nM), elevated stability, and anti-interference ability. By analyzing the conductivity, hydrophilicity, and electrochemically active surface area of the CC/Ti3C2Tx/NiCoP composite, the reasons for its excellent performances are revealed for DA detection. At present, the research on NiCoP mainly focuses on hydrogen evolution, oxygen evolution, and supercapacitor. This research provides a regulatory strategy for the application of phosphide materials in sensors.
研究领域:
材料科学
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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 ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Meiling Lian,Yuqing Shi,Wei Zhang,Jingbo Zhao,Da Chen
This work reports the synthesis and application of nitrogen and sulfur co-doped Nb 2 C MXene (NS-Nb 2 C) for the sensing of dopamine (DA) in gastric juice. NS-Nb 2 C MXene was successfully synthesized in a one-step treatment of Nb 2 C using thiourea as N,S resource. The heteroatom doping strategy enables introduction of N,S into MXene nanosheets and simultaneously induces the increased interlayer spacing, high surface area, and enhanced electrical conductivity. It was found that NS-Nb 2 C is more electrochemically active than multilayered Nb 2 C nanosheets (ML-Nb 2 C) and delaminated Nb 2 C nanosheets (DL-Nb 2 C). Based on this, the as-prepared NS-Nb 2 C/Nafion/GCE was used to study the electrochemical behavior of dopamine in pH = 3.0. The sensing interface not only utilizes the unique two-dimensional (2D) nanosheet morphology of Nb 2 C that has a larger surface area and conductive network, but also takes advantage of the more active sites provided by doping. This enables the sensor to achieve ultra-sensitive detection of dopamine (S/N = 3) with a low limit of detection (LOD) of 0.12 µM. In addition, the prepared sensor has good stability and selectivity, and the results of detecting DA in simulated gastric juice is satisfactory. The results indicated that the Nb-based MXenes provided a promising tool for acidic electrochemical sensing applications.
研究领域:
材料科学
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电化学传感
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医学检测
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2024
·Vol. 11
·期 7
·3162-3177
·
IF 5.8
Ningning Xing,Yangsai Lyu,Weilin Zhao,Ziwei Lan,Min Zuo,Jia Li
Studies on combining the catalytic activity of nanomaterials with self-propelled micro/nanomotors for determining and degrading contaminants in the water environment are rapidly growing, especially in constructing cost-effective platforms that can simultaneously achieve both functions. Herein, we report a novel bifunctional magnetic micromotor (CA-MnO2@Co–N/C) with greatly enhanced micromixing performance, as well as improved detection and degradation capabilities for aniline in water. The CA-MnO2@Co–N/C micromotors were composed of a bioderived carbon matrix, ZIF-67-derived magnetic Co–N/C, and MnO2 nanosheets. The micromotors not only exhibited excellent peroxidase-like activity (POD-like activity) but also showed superior Fenton-like catalytic activity. The micromotors achieved self-propulsion motion by generating O2 bubbles from the catalytic decomposition of H2O2, with the highest speed of 398.88 μm s−1 in 7 wt% H2O2. The CA-MnO2@Co–N/C micromotors exhibited sensitive detection and efficient removal toward aniline in water, which was attributed to the synergistic effect between hierarchical structure, citric acid modification and bubble-driven propulsion. The limit of detection (LOD) for aniline was 0.185 μM, and the highest removal efficiency of aniline reached 83% in 180 min based on our dynamic catalytic reaction platform. In comparison to traditional micro/nanomaterials, the simple fabrication process, self-propulsion performance, and excellent catalytic activity of CA-MnO2@Co–N/C micromotors provided a promising strategy for a dynamic environmental monitoring and remediation platform.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Taotao Fan,Li Chen,Shunguo Qiu,Chanyuan Yang,Lihua Hu,Xiong Peng,Jianwei Zhang,Zongcheng Yan
A hybrid nanocomposite of hierarchical porous zeolitic imidazolate framework-8 / three-dimensional carbon nanotubes (HP-ZIF-8/3DCNTs) has been successfully fabricated by constructing micelle by sodium dodecyl sulfate (SDS) and deep eutectic solvent (DES) aqueous solution to grow HP-ZIF-8 in situ on the 3DCNTs template. The electrochemical performance for detecting dopamine (DA) is greatly improved owing to the synergism of highly conductive CNTs and hierarchical porous ZIF-8. At the same time, the electrochemical reaction of DA on HP-ZIF-8/3DCNTs/GCE is an adsorption control process, and density function theory (DFT) calculation was performed to analysis the charge distribution and interaction force of DA and dopaminophenone in the material, forming a molecular complex with adsorption energy of −19.11 and − 25.21 kJ/mol −1 . In addition, the response current is linear when the DA content is 1.0 × 10 −7 to 1.0 × 10 −4 M, the LOD is 2.7 × 10 −8 M at S/N = 3. The electrode material has excellent selectivity, sterling reproducibility of 2.21% and satisfactory repeatability with a RSD of 1.96%, and splendid long-term stability with peak current maintained 96.03% of the initial value after 14 days. The results indicate that HP-ZIF-8/3DCNTs composite has broad application prospects in the field of electrochemical sensing, and its modification methods and theoretical concepts can potentially be applied to the research of other sensors.
研究领域:
材料科学
·
电化学传感
·
理论计算
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产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Yulin Zhu,Yan Liang,Jianxian You,Dehua Wang,Jiahao Li,Yanxing Yang,Yong Yang
The resistive gas sensors based on semiconductor materials provide an effective strategy for the detection of harmful gases. However, the limitations of surface gas adsorption activity and interface charge transfer efficiency of semiconductor sensing materials, as well as the complex device fabrication process, pose significant challenges to the development of sensors. Here, a ternary Co3O4/ZnIn2S4/Pt heterostructure arrays gas sensor is designed, which consists of Co3O4 nanowire arrays grown in situ on an alumina flat substrate as backbones, ultrathin ZnIn2S4 nanosheets wrapped around the surface of Co3O4 nanowires, and highly dispersed Pt nanoparticles on the outermost layer. It enables superior sensing performance for the detection of the volatile organic compound triethylamine, which exhibits a significant response of ∼118.97 (Ra/Rg) toward 100 ppm of triethylamine at a relatively low working temperature of 200 °C, along with excellent response/recovery speed, selectivity, and enduring stability (over 3 months). Based on first-principles calculation and a series of spectroscopic characterization (including in situ spectroscopy), it is revealed that the heterostructure arrays exhibited enhanced adsorption activity for both oxygen and triethylamine molecules. Most importantly, the robust p-n heterointerface (Co3O4/ZnIn2S4) and semiconductor-metal heterointerface (Co3O4/Pt, ZnIn2S4/Pt) are formed in the ternary heterostructure, achieving efficient multi-interface charge transfer characteristics. In addition, thanks to the design of in situ 1D/2D/0D porous array structures, the ternary Co3O4/ZnIn2S4/Pt heterostructure arrays not only have large specific surface areas for gas reaction but also simplify device manufacturing. This research offers novel perspectives on boosting the gas sensing performance of semiconductor materials through the comprehensive design of ternary heterostructures with robust multi-interfaces.
研究领域:
材料科学
·
化学工程
·
半导体技术
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiaoyu Chen,Zhuo Liu,Shuang Li,Yue Sun,Yuchi Zhang,Yan Xu
Extraordinary behavior of semiconductor metal oxide-based gas sensors is broadly applied in gas supervision, but they usually suffer from high operating temperature , gas cross-sensitivities and response fluctuations, limiting their use in expanding applications. Herein, hierarchical In 2 O 3 /ZnO micro-flower with in-plane folded shells heterostructure was successfully prepared through simple glycerol-assisted solvothermal method followed by a subsequent pyrolysis treatment. The optimized In 2 O 3 /ZnO-0.5 heterostructure with specific In/Zn molar ratio exhibits excellent triethylamine (TEA) sensing capability at 200 ℃, including a high response of 34.87 towards 100 ppm TEA, superb gas selectivity , fast response and recovery time (62 s/33 s) and prolonged cyclic stability, ascribing to the well assembly of the unique In 2 O 3 /ZnO n-n heterojunction with plentiful reactive sites, which markedly promote the absorption of TEA and the surface gas sensitive reaction with oxygen species at the close contacted interface between In 2 O 3 and ZnO. This work demonstrates a stable method for feasible manufacturing of In 2 O 3 /ZnO heterostructure with intriguing multi-level micro-nanostructure for highly sensitive TEA gas sensing application.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2023
·
IF 2.7
Gholipour Arsalan,Rahmani Shahrzad
In the current study, the fluorescent Carbon quantum dots (CDs) were synthesized through one-step hydrothermal approach by orange juice without any additional agents. The as-prepared green-CDs (GCDs) were quasi-spherical shape ranged from 2 to 8 nm with an average diameter of 5 nm, and emitted bright blue fluorescent (FL) under ultraviolet light irradiation (Uv). Different detailed analyses proved that the as-prepared GCDs had good morphologies, various functional groups, high water solubility, great optical features, and excellent stability towards diverse environmental conditions. The results indicated that the as-prepared GCDs can detect different concentrations of dopamine from 1 to 100 µM based on the quenching of their native fluorescent. Furthermore, the good linear relationship was obtained for dopamine in the broad range of concentrations from 1 to 100 µM with the limit of detection (LOD) of 0.81 µM. In addition, the as-prepared GCDs can be applied as a fluorescent probe for detection of dopamine in the different real samples.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 8
·1070-1076
·
IF 0
Fu Shang,Zhang Hongguang,Wang Guowei,Wang Meng,Wang Yu,Xia Cunhui
We successfully obtained ∝-Fe2O3 microspheres with a ca. 500 nm diameter through solvothermal method and subsequent annealing at 300 °C for 2 h in air. The composition and morphology of the samples were analyzed by FT-IR, XRD, SEM, TEM, TG and BET.
The gas sensitivity measurements indicated that the sensor of ∝-Fe2O3 microspheres showed good selectivity and high response to aniline gas. This sensor showed a response to aniline gas as low as 0.01 ppm, and the response achieved 12.5 at 150 °C to 10
ppm aniline. The enhanced gas sensing properties were due to enough pore architectures of the sample. These results demonstrated that the samples have a good application prospect in preparation of high-performance gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
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