Electrochemical sensor prepared from molecularly imprinted polymer for recognition of TNT

Shi, Lei; Hou, Aolin; Chen, L.Y.; Wang, Z.F.

doi:10.1002/pc.23032

Cited by 37 publications

(23 citation statements)

References 21 publications

(20 reference statements)

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“…This validates that our sensor can detect a range of nitroaromatics. When compared with other reported methods for TNT, DNT, and DNB detection, the performance of our ZIF‐8‐modified electrode has lower LOD with a rational linear range (Table S1, Supporting Information) for TNT …”

Section: Resultsmentioning

confidence: 87%

Rapid and Scalable Synthesis of Zeolitic Imidazole Framework (ZIF‐8) and its Use for the Detection of Trace Levels of Nitroaromatic Explosives

Prathap

Gunasekaran

2018

Advanced Sustainable Systems

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A facile and inexpensive approach for scalable synthesis of highly porous zeolite imidazolate framework nanoparticles (ZIF‐8) is described. The synthesis, done in an aqueous solution at room temperature, takes just 2 min compared to hours or days in nonaqueous conditions. The structural integrity and phase purity of ZIF‐8 are studied through X‐ray powder diffraction and are of sodalite topology, and its surface nature and composition are determined with X‐ray photoelectron spectroscopy. ZIF‐8 has high crystallinity, large Brunauer–Emmett–Teller surface area (1398.7 m2 g−1) and pore volume (0.62 cm3 g−1). Images of ZIF‐8 show hexagonal nanocrystals, whose growth is observed with atomic force microscopy (AFM). Thermogravimetric analysis data testify the thermal stability of the material (490 °C in air). Zeta potential measurement confirms that trinitrotoluene (TNT) molecules adsorb onto ZIF‐8. The interaction between the electron‐deficient aromatic core of TNT and the electron‐rich ZIF‐8 is considered to favor the formation of donor–acceptor electron‐transfer mechanism, and the electron conductivity of ZIF‐8 facilitates the effective reduction of TNT. Using the prepared ZIF‐8, an electrochemical sensor is fabricated to detect TNT and other nitroaromatic explosives in aqueous phase. The sensor performance is highly linear, with very low limit of detection (346 × 10−12m), and is unaffected by the presence of various interferents.

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Section: Resultsmentioning

confidence: 87%

Rapid and Scalable Synthesis of Zeolitic Imidazole Framework (ZIF‐8) and its Use for the Detection of Trace Levels of Nitroaromatic Explosives

Prathap

Gunasekaran

2018

Advanced Sustainable Systems

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“…In addition, the excellent environmental durability and availability for operating in aqueous phase make PANI one of the best candidates for molecularly imprinted conductive polymers [ 44 ]. Various research of molecularly imprinted PANI (MIP-PANI) sensors for detecting chemicals [ 45 , 46 , 47 , 48 ] and proteins [ 37 , 49 ] has been reported. However, the synthesis of MIP-PANI usually relies on electrochemical polymerization, in which the substrates must be conductive materials like precious metals or graphite, potentially increasing the cost of the entire sensor.…”

Section: Introductionmentioning

confidence: 99%

Perfluorooctanesulfonic Acid Detection Using Molecularly Imprinted Polyaniline on a Paper Substrate

Chi

Chen

Kameoka

2020

Sensors

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Perfluorinated compounds like perfluorooctanesulfonic acid (PFOS) are synthetic water pollutants and have accumulated in environments for decades, causing a serious global health issue. Conventional assays rely on liquid chromatography and mass spectroscopy that are very expensive and complicated and thus limit the large-scale monitoring of PFOS in wastewater. To achieve low-cost and accurate detection of PFOS, we designed a paper-based sensor with molecularly imprinted polyaniline electrodes that have recognition sites specific to PFOS. The calibration curve of resistivity ratios as a function of PFOS concentrations has a linear range from 1 to 100 ppt with a coefficient of determination of 0.995. The estimated limit of detection is 1.02 ppt. We also investigated attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) spectra of the surface of the polyaniline (PANI) electrodes to propose the potential recognition sites in polyaniline matrix and the detection mechanism. This electrical paper sensor with low cost and excellent sensitivity and selectivity provides the potential for large-scale monitoring of wastewater.

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“…Especially fast, inexpensive with high sensitivity and a viable option for miniaturization are the electrochemical sensors based on MIPs. Electrochemical sensors based on MIPs have been prepared for recognition TNT and 1,3-dinitrobenzene (DNB), and they exhibited better selectivity to TNT and DNB [24,25].…”

Section: Introductionmentioning

confidence: 99%

Preparation of an Electrochemical Sensor Based on Surface Molecularly Imprinted Polymers Modified Electrode and its Application in Detection of Nitrocellulose

Meng

Yang

Xiao

2019

Propellants Explo Pyrotec

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In order to develop a novel method for the detection of nitrocellulose (NC), an electrochemical sensor based on silica surface molecularly imprinted polymers (SiO2/MIPs) modified electrode was prepared to detect NC. In addition, SiO2 non‐imprinted polymers‐based (SiO2/NIPs) sensor was prepared as a control. The response characteristic of SiO2/MIPs‐based sensor to NC was studied with [Fe(CN)6]3−/4− as a probe molecule. The SiO2/MIPs‐based sensor have an optimized current responsiveness to NC when it was prepared at temperature of 50 °C and 1 : 3 proportion of methacrylic acid to ethyleneglycol dimethacrylate. The current response of SiO2/MIPs‐based sensor is the most significant under the NC solution of 4.0 mg mL−1, incubation period of 1 min and [Fe(CN)6]3−/4− electrolyte of 5 mM. The SiO2/MIPs‐based sensor had the greatest response capacity for NC among the several analogues, which indicates that the SiO2/MIPs‐based sensor has a good specificity to NC. Furthermore, the SiO2/MIPs‐based sensor exhibited an excellent reproducibility in repeated measurements. Results show the prepared SiO2/MIPs‐based sensor can be a potential candidate for the detection of NC in the security checking and hazard control.

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Electrochemical sensor prepared from molecularly imprinted polymer for recognition of TNT

Cited by 37 publications

References 21 publications

Rapid and Scalable Synthesis of Zeolitic Imidazole Framework (ZIF‐8) and its Use for the Detection of Trace Levels of Nitroaromatic Explosives

Rapid and Scalable Synthesis of Zeolitic Imidazole Framework (ZIF‐8) and its Use for the Detection of Trace Levels of Nitroaromatic Explosives

Perfluorooctanesulfonic Acid Detection Using Molecularly Imprinted Polyaniline on a Paper Substrate

Preparation of an Electrochemical Sensor Based on Surface Molecularly Imprinted Polymers Modified Electrode and its Application in Detection of Nitrocellulose

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