DALTON TRANSACTIONS
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2014
·Vol. 43
·期 26
·10057-10063
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IF 4.097
Xin Yang,Junhai Wang,Dongyue Su,Qingdong Xia,Fang Chai,Chungang Wang,Fengyu Qu
Rapid and sensitive detection of 2,4,6-trinitrotoluene (TNT) and 4-nitrophenol (4-NP) has attracted considerable attention due to their wide applications as nitroaromatic explosive materials. A novel fluorescence method for TNT and 4-NP based on bovine serum albumin functionalized fluorescent gold nanoclusters (BSA Au-NCs) has been developed. The detection probe BSA Au-NCs can be used as a fluorescent probe for the sensitive and selective detection of TNT and 4-NP simultaneously. A good linearity of fluorescence detection using BSA Au-NCs as a fluorescent probe was observed for TNT and 4-NP concentrations in the range of 10−8–5 × 10−5 M and 10−9–5 × 10−5 M, with a detection limit of 10 nM and 1 nM, respectively. The high specificity of TNT and 4-NP with BSA Au-NCs interactions provided excellent selectivity towards detecting TNT and 4-NP over other relevant nitroaromatic compounds. This system can be applied to test strips to detect TNT and 4-NP with high sensitivity and selectivity. The vapour of TNT and 4-NP can be detected using BSA Au-NCs test paper within 1 min with a detection limit of 10 pM and 1 pM.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2015
·Vol. 3
·期 18
·10069-10076
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IF 7.443
Jie Liu,Shenghong Yang,Fengyun Li,Lijun Dong,Jingjing Liu,Xiayan Wang,Qiaosheng Pu
Analyte oriented selection of the preparation procedure is essential for improving the sensing performance. Herein, we report a one-step approach to synthesize highly fluorescent polymeric nanoparticles through a solvothermal method and their application for sensitive detection of TNT in soil samples by a fluorescence spectrometric method. The polymeric nanoparticles with bright cyan fluorescence were obtained through polycondensation between melamine and terephthalaldehyde at 180 °C for 3 h. The nanoparticles were fully characterized and the effect of synthesis methods was compared based on the fluorescence intensity and quantum yield (QY). The results indicated that trace amounts of TNT could effectively quench the fluorescence of the polymeric nanoparticles. The effect of the possible co-existing substances was systematically investigated and it was proved that nanoparticles could be used for selective and robust detection of TNT. A limit of detection of 1.8 nmol L−1 was achieved. The standard addition recoveries for different soil samples were in the range of 95.3% and 106.4% with relative standard deviations below 5.2%.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2015
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IF 2.752
Shuchen Tu,Fengzhu Lv,Pan Hu,Zilin Meng,Hongtao Ran,Yihe Zhang
Secondary and primary amines containing silica foams (F–SiO 2 ) were prepared by using silane coupling agents, (3-aminopropyl) triethoxysilane (KH-550) and bis(3-triethoxysilicyl propyl)-amine (KH-270), as modifiers. Not only Brunauer–Emmett–Tell (BET) surface and pore size of F–SiO 2 are greatly reduced after modification, but also increased chemical oxygen demand (COD) removal efficiency to trinitrotoluene (TNT) red water is obtained. Among the series of F–SiO 2 , the secondary amine modified silica foams possess higher COD removal capacity. Controlled experiments indicate the adsorption mainly derives from the attraction of amine groups toward the negative organic pollutants in TNT red water rather than the effect of the large BET surface and hydroxyl groups on the surface of F–SiO 2 . The adsorption model studies show the pseudo-second-order dynamic adsorption model and Langmuir isotherm model well fit the experimental data. The prepared amine-modified F–SiO 2 is an efficient adsorbents of organic pollutants in TNT red water.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
POLYMER COMPOSITES
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2014
·Vol. 36
·期 7
·1280-1285
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IF 1.455
L. Shi,A.G. Hou,L.Y. Chen,Z.F. Wang
We report herein an effective strategy for recognizing of 2,4,6-trinitrotoluene (TNT) molecules at the surface of graphene polyaniline (PANI) nanocomposites. The imprinted template was synthesized using picric acid as a template analogue for the explosive. The recognition sites were generated by the extraction of the imprinting template from GN-PANI-molecularly imprinted polymer film. The morphology of preparing films was investigated using scanning electronic microscopy images. The differential pulse voltammograms and cyclic voltammograms were used for TNT detection. The results reported here could form the basis of a new strategy for preparing various polymer-coating layers on PANI supports and the molecular imprinting techniques discussed could also find applications in the fields of separation and environmental monitoring. POLYM. COMPOS., 36:1280–1285, 2015. © 2014 Society of Plastics Engineers
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
Journal of Environmental Sciences
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2020
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IF 4.302
Jing Li,Qingxiang Zhou,Miao Li,Yongli Liu,Qinan Song
Nitroaromatic explosives are major pollutants produced during wars that cause serious environmental and health problems. The removal of a typical nitroaromatic explosive, 2,4,6-trinitrotoluene (TNT), from aqueous solution, was conducted using a new recyclable magnetic nano-adsorbent (Fe@SiO 2 NH 2 ). This adsorbent was prepared by grafting amino groups onto Fe@SiO 2 particles with a well-defined core-shell structure and demonstrated monodispersity in solution. The removal performance of the nano-adsorbent towards TNT was found to be 2.57 and 4.92 times higher than that towards two analogous explosives, 2,4-dinitrotoluene (2,4-DNT) and 2-nitrotoluene (2-NT), respectively, under neutral conditions. The difference in the removal performance among the three compounds was further compared in terms of the effects of different conditions (pH value, ionic strength, humic acid concentration, adsorbent modification degree and dosage, etc.) and the electrostatic potential distributions of the three compounds. The most significant elevation is owing to modification of amino on Fe@SiO 2 which made a 20.7% increase in adsorption efficiency of TNT. The experimental data were well fit by the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model, indicating multilayer adsorption on a heterogeneous surface. The experimental results and theoretical considerations show that the interactions between Fe@SiO 2 NH 2 NPs and TNT correspond to dipole-dipole and hydrophobic interactions. These interactions should be considered in the design of an adsorbent. Furthermore, the adaptability to aqueous environment and excellent regeneration capacity of Fe@SiO 2 NH 2 NPs makes these remediation materials promising for applications.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2016
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IF 2.822
Tao Yang,Renzhong Yu,Huaiyin Chen,Ruirui Yang,Shiying Wang,Xiliang Luo,Kui Jiao
Recently, molybdenum disulfide-based nanocomposites have been widely used in electrochemical sensing area. In this paper, molybdenum disulfide-poly( m -aminobenzenesulfonic acid) (MoS 2 -PABSA) nanocomposite was prepared through a simple electropolymerization procedure for TNT detection. The pre-obtained thin-layered MoS 2 nanosheet was adopted as the scaffold in the electropolymerization process and the m -aminobenzenesulfonic acid monomer was effectively electrodeposited on it via cyclic voltammetry . The morphology and electrochemical behaviors of MoS 2 -PABSA nanocomposite were investigated by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and some electrochemical methods. The obtained nanocomposite possesses excellent electrochemical detecting performance towards aromatic ring compounds, such as 2,4,6-trinitrotoluene, TNT, which have strong π-π interaction with the MoS 2 -PABSA sensing platform. The detailed electrochemical characterization of MoS 2 -PABSA showed the influence of electropolymerization cycles and pH values on detection of TNT. Under the optimum condition, highly sensitive detection for TNT was realized with the limit of detection of 0.043 ppb (0.187 nmol L − 1 ) and a linear range of 0.1–200 ppb. This research proves that the MoS 2 -PABSA was a worthy electrochemical sensing platform for further simple and sensitive detection of some other aromatic ring compounds.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 120
·98724-98729
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IF 3.84
Yahui Guo,Xiongtao Wang,Bin Miao,Ying Li,Weirong Yao,Yunfei Xie,Jiadong Li,Dongmin Wu,Renjun Pei
Herein, an ultrasensitive sensor based on a AlGaN/GaN high electron mobility transistor (HEMT) was developed for the detection of 2,4,6-trinitrotoluene (TNT). The sensing surface of the AlGaN/GaN HEMT grid was covalently bonded with a layer of gold nanoparticles which were functionalized with cysteamine for specific electrostatic interaction with TNT. The binding of TNT to cysteamine through donor–acceptor interactions could affect the surface charge on the gate area of the AlGaN/GaN HEMT, resulting in a gate voltage change and density changes of the 2-dimensional electron gas (2EDG) at the interface of AlGaN/GaN. By the merit of the high electron mobility of the AlGaN/GaN transistor and robust binding between cysteamine and TNT, the sensor demonstrated a fast response and excellent performance with quantitative ranges at ppt levels (from 0.1 ppt to 10 ppb) with good selectivity towards TNT. This HEMT sensor showed attractive properties for TNT detection in terms of speed, sensitivity and miniaturization.
研究领域:
材料科学
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传感器技术
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爆炸物检测
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2013
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IF 5.437
Minmin Liu,Wei Chen
Sensitive and selective detection of 2,4,6-trinitrotoluene (TNT) has attracted considerable attention due to the wide applications of TNT as explosive material . Many efforts have been made to develop various sensors for detecting TNT in recent years. We herein report a novel sensor based on p-aminothiophenol (PATP) functionalized silver nanoparticles supported on graphene nanosheets (Ag/GNs), which was found to be a kind of effective chemosensor for the ultratrace detection of TNT by using surface enhanced Raman scattering (SERS). In the present hybrid material, PATP is paired together to form a corresponding azo compound p, p′-dimercaptoazobenzene (DMAB) and thus can be used as a model Raman probe. The π-donor–acceptor interaction between π-acceptor TNT and π-donor DMAB-Ag/GNs complex can effectively induce the “hot spots” for SERS. The intense spectral resonance from the DMAB–TNT–DMAB bridges formed between the Ag/GNs nanosheets could result in enhanced Raman signals of DMAB molecules with the presence of ultratrace TNT. SERS measurements demonstrated that TNT with concentration as low as 10 −11 M can be detected by using the present SERS platform. The present study not only provides a facile method for ultrasensitive and selective detection of TNT but also could develop a graphene-based SERS platform.
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2013
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IF 2.144
Lijuan Feng,Cuiyan Tong,Yao He,Bingxin Liu,Chunyu Wang,Jie Sha,Changli Lü
A new fluorescent sensor based on single water-soluble β-cyclodextrin (β-CD) molecule as the support carrier of donor and acceptor complex was designed, and used for TNT detection by fluorescence resonance energy transfer (FRET). In this sensing platform, per-6-amino-β-CD (per-6-NH 2 -β-CD) was used as the detection vehicle. The probe dye of fluorescein 5(6)-isothiocyanate (FITC) was covalently linked onto the per-6-NH 2 -β-CD rim with the grafting molar ratio of 1:1, the residual amino groups of per-6-NH 2 -β-CD can adsorb TNT molecules by forming Meisenheimer complex (TNT–amine complex) with TNT. The absorbtion spectrum of this complex has a spectral overlapping with the emission of FITC in aqueous solution, so it can strongly suppress the fluorescence emission of the adjacent FITC through FRET on β-CD vehicle. This FRET-based fluorescent sensing technique provides a facile, ultrasensitive and selective detection method for TNT molecule. The observed linear fluorescence intensity change could allow the quantitative detection TNT with the detection limit of 20 nM in water.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Yingxin Ma,Sheng Huang,Leyu Wang
Rapid, sensitive and selective detection of 2,4,6-trinitrotoluene (TNT) in aqueous solution differentiating from other nitroaromatics and independent of complicated instruments is in high demand for public safety and environmental monitoring. Despite of many methods for TNT detection, it is hard to differentiate TNT from 2,4,6-trinitrophenol (TNP) due to their highly similar structures and properties. In this work, via a simple and versatile method, LaF 3 ːCe 3+ −Tb 3+ and Fe 3 O 4 nanoparticle-codoped multifunctional nanospheres were prepared through self-assembly of the building blocks. The luminescence of these nanocomposites was dramatically quenched via adding nitroaromatics into the aqueous solution. After the magnetic separation, however, the interference of other nitroaromatics including 2,4,6-trinitrophenol (TNP), 2,4-dinitrotoluene (DNT), and nitrobenzene (NB) was effectively overcome due to the removal of these coexisting nitroaromatics from the surface of nanocomposites. Due to the formation of TNT − −RCONH 3 + , the TNT was attached to the surface of the nanocomposites and was quantitatively detected by the postexposure luminescence quenching . Meanwhile, the luminescence intensity is negatively proportional to the concentration of TNT in the range of 0.01–5.0 μg/mL with the 3 σ limit of detection (LOD) of 10.2 ng/mL. Therefore, the as-developed method provides a novel strategy for rapid and selective detection of TNT in the mixture solution of nitroaromatics by postexposure luminescence quenching.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
TALANTA
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2013
·
IF 3.498
Yingxin Ma,Leyu Wang
This paper reports a rapid, sensitive, and selective nanosensor for the detection of 2,4,6-trinitrotoluene (TNT) in the mixture aqueous solution of nitroaromatics independent of immunoassay or molecularly imprinted technology and complicated instruments. Despite many strategies including immunoassay and molecularly imprinted technologies been successfully developed for the detection of TNT, it is not easy to differentiate TNT from 2,4,6-trinitrophenol (TNP) due to their very similar chemical structures and properties. In this work, the amine functionalized NaYF 4 :Yb 3+ /Er 3+ upconversion luminescence nanoparticles (UCNPs) whose excitation (980 nm) and emission (543 nm) wavelength were far from the absorbance bands of other usual interference nitroaromatics including 2,4-dinitrotoluene (DNT), nitrobenzene (NB), and especially TNP, were utilized as the luminescent nanosensors for TNT luminescence detection. To make these UCNPs highly water stable and render the charge transfer from UCNPs to TNT easier, amino groups were introduced onto the surface of the UCNPs by coating a polymer layer of ethylene glycol dimethacrylate (EGDMA) hybridized with 3-aminopropyltriethoxysilane (APTS). After binding with TNT through amino groups on the UCNPs, the naked eye visible green upconversion luminescence of the UCNPs was dramatically quenched and thus a sensitive UC luminescence nanosensor was developed for TNT detection. However, other nitroaromatics including TNP, DNT, and NB have no influence on the green UC luminescence and thus no influence on the TNT detection. The luminescence intensity is negatively proportional to the concentration of TNT in the range of 0.01−9.0 µg/mL with the 3 σ limit of detection (LOD) of 9.7 ng/mL. The present studies provide a novel and facile strategy to fabricate the upconversion luminescence sensors with highly selective recognition ability in aqueous media and are desirable for label free analysis of TNT in mixed solution independent of immunoassay and molecularly imprinted technology and complicated instruments.
研究领域:
化学传感器
·
环境监测
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材料科学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jingju Cai,Jinxin Xie,Qizhan Zhang,Minghua Zhou
A flow-through system was constructed for 2,4-dichlorophenoxyacetic acid (2,4-D) degradation for the first time using efficient boron and cobalt co-doped TiO 2 nanotubes (B, Co-TNT) as the anode and carbon black doped carbon felt (CB-CF) that had a high H 2 O 2 yield as the cathode. Compared with dimensionally stable anode (DSA), whether in anodic oxidation (AO) or AO-electro-Fenton (EF) system, 2,4-D degradation in B, Co-TNT anode system was more efficient accompanying with a lower energy consumption (Ec). Different operating parameters including applied current density, initial pH and flow rate were explored, supporting that the optimal Fe 2+ dosage was 0.5 mM while decreasing the initial pH and increasing the current intensity and flow rate were beneficial to 2,4-D removal. In this AO-EF system, the involved mechanisms for 2,4-D degradation were anodization and Fenton oxidation, possessing the comprehensive effect of • OH and SO 4 •- with their contribution of 92.7% and 4.8%, respectively. This flow-through AO-EF system performed a stable performance, and an efficient degradation performance with low Ec (5.8–29.5 kWh (kg TOC) −1 ) was obtained for different kinds of contaminants (methylene blue, phenol, p -nitrophenol and sulfamethazine). Therefore, B, Co-TNT anode coupled with CB-CF cathode in flow-through system was effective for contaminants degradation.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）