SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Jun Qin,Xiaomei Li,Yunfeng Bai,Feng Feng,Qiliang Pan,Jianguo Zhao
A novel mesoporous silica-deoxycholate (MS-NaDC) synergistic substrate was developed for room-temperature phosphorescence (RTP) sensing and analysis. The substrate exhibited rapid and strong RTP-inducing ability toward 9-bromophenanthrene (9-BrP). The formation mechanism of MS-NaDC synergistic substrate was analyzed and demonstrated. Five MSs with pore size range of 2.73–18.58 nm were synthesized and investigated, and the MS designated as LPMS2 was selected for its rapid RTP protection and good stability in dispersions. RTP in the presence of MS-NaDC substrate also shows good thermostability. Assistant inducers, such as cyclohexane, can be used together for further RTP enhancement. Finally, 9-BrP holds a fairly wide linear concentration range of 2 nM–3 μM, and a detection limit of 0.5 nM. All the results demonstrated the feasibility and application potential of the MS-NaDC substrate in RTP.
研究领域:
分析化学
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材料科学
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生物传感器
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纳米医学
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分子探针
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环境监测
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Shan Liu,Maochao Wei,Xiangli Zheng,Shuai Xu,Changli Zhou
We are just beginning to exploit the fascinating potential of thionine , called electrochemical probe that can selectively recognize specific polycyclic aromatic hydrocarbons (PAHs), as tools for the detection of tricyclic aromatic hydrocarbons phenanthrene (PHE) and anthracene (ANT). A novel electrochemical sensing platform by modification of electroactive thionine functionalized graphene onto glass carbon electrode (Th/GRs/GCE) surface was constructed. The immobilized thionine showed a remarkable stability, which may benefit from the π–π stacking force with graphene. Under optimum conditions, the proposed electrochemical sensor exhibited high sensitivity and low detection limit for detecting PHE and ANT. The total amount of PHE and ANT could be quantified in a wide range of 10 pM–0.1 μM with a good linearity ( R 2 = 0.9979) and a low detection limit of 0.1 pM ( S / N = 3). Compounds which possess one or two benzene rings or PAHs with more than three rings, such as benzene, naphthalene (NAP), benzo[a]pyrene (BaP) and pyrene (PYR) show little interference on the detection. Consequently, a simple and sensitive electrochemical method was proposed for the determination of PHE and ANT, which was used to determine PHE and ANT in waste water samples. The electrochemical method provides a general tool that complements the commonly used spectroscopic methods and immune method for the detection of PAHs.
研究领域:
分析化学
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环境监测
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电化学传感器
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分子识别
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污染物检测
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2014
·Vol. 33
·期 1
·125-130
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IF 1.04
Ting Zhou,Hao Yu,Mingqiang Liu,Ying-Wei Yang
Carboxylated pillar[5]arene (CP5) macrocycles were modified onto the surface of reduced graphene oxide (RGO) via covalent bonds to form new pillarene-functionalized RGO nanosheets, i.e. , RGO-CP5. The obtained RGO-CP5 nanosheets capable of molecular recognition exhibited much better water-dispersibility and enhanced fluorescence-quenching property as compared with native RGO. This new sensing platform holds great potentials in the sensing and detection of analytes, such as organic dye molecules and pesticides, in aqueous solutions.
研究领域:
分析化学
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纳米材料科学
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传感器技术
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环境监测
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分子识别
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2024
·Vol. 36
·期 5
·e202300367
·
IF 2.7
Yang Liu,Tao Liu,Yijing Ai,Baoli Wang,Zejun Zhang,Dan Zhang,Wei Sun
This research established an electrochemical sensing platform for sensitive dopamine (DA) detection using a modified glassy carbon electrode (GCE) made from waste pineapple leaf derived porous carbon (PLPC), which was applied to DA analysis in human blood samples with the characteristics such as simple procedure, excellent anti-interference ability and low detection limit. Transmission electron microscopy revealed a layered and porous structure in the morphology of PLPC. PLPC's specific surface area and average pore size were determined to be 350.48 m 2 /g and 3.72 nm, respectively. The crystal phase and valence state were examined using X-ray photoelectron spectroscopy and X-ray diffraction. Using the best parameters, cyclic voltammetry and differential pulse voltammetry were applied to study the electrochemical behaviors of DA on PLPC/GCE. On PLPC/GCE a wide linear range of 0.05–500.0 μmol/L and a low detection limit of 0.0075 μmol/L for DA detection could be realized. The recoveries of DA were 97.67–102.07 % for detection of human blood sample with excellent stability, reproducibility and repeatability. Therefore the waste pineapple leaf based biomass porous carbon could be used as promising potential candidate for sensing application.
研究领域:
分析化学
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电化学
·
材料科学
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生物传感器
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环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2011
·Vol. 30
·期 1
·112-117
·
IF 5.361
Huanshun Yin,Yunlei Zhou,Xiaomeng Meng,Kun Shang,Shiyun Ai
The graphene nanosheets and carbon nanospheres mixture (GNS–CNS) was prepared by electrolyzing graphite rob in KNO 3 solution under constant current, which was characterized by TEM, AFM, SEM, FT-IR, XRD, XPS, TGA and UV–vis. The nano-mixture can keep stable in water for more than one month. Based on this kind of mixture material, a novel electrochemical biosensing platform for glucose determination was developed. Cyclic voltammetry of glucose oxidase (GOD) immobilized on GNS–CNS/GCE exhibited a pair of well-defined quasi-reversible redox peaks at −0.488 V ( E pa ) and −0.509 V ( E pc ) by direct electron transfer between the protein and the electrode. The charge-transfer coefficient ( α ) was 0.51, the electron transfer rate constant was 2.64 s −1 and the surface coverage of HRP was 3.18 × 10 −10 mol cm −2 . The immobilized GOD could retain its bioactivity and catalyze the reduction of dissolved oxygen. The glucose biosensor has a linear range from 0.4 to 20 mM with detection limit of 0.1 mM. Moreover, the biosensor exhibits acceptable reproducibility and storage stability. The fabricated biosensor was further used to determine glucose in human plasma sample with the recoveries from 96.83% to 105.52%. Therefore, GOD/GNS–CNS/GCE could be promisingly applied to determine blood sugar concentration in the practical clinical analysis.
研究领域:
分析化学
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纳米生物技术
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电化学传感
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生物医学工程
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临床检验
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）