TALANTA
·
2014
·
IF 3.511
Dangqin Jin,Qin Xu,Yanjuan Wang,Xiaoya Hu
Nonelectroactive acetochlor can be indirectly determined through the photocatalytical degradation of acetochlor. A derivative visible light photoelectrochemical sensor for indirect detection of the herbicide acetochlor using TiO 2 –poly(3-hexylthiophene)–ionic liquid nanocomposite is constructed. Poly(3-hexylthiophene) (P3HT) was synthesized via chemical oxidative polymerization with anhydrous FeCl 3 as oxidant, 3-hexylthiophene as monomer , chloroform as solvent, and the functional TiO 2 nanoparticles were facilely prepared by blending TiO 2 nanoparticles and P3HT at room temperature ionic liquid , 1-Butyl-3-methylimidazolium hexafluorophosphate solution. Operational parameters, including the photolysis time, ratios of TiO 2 to P3HT, bias voltage and pH of buffer solution have been optimized. Under optimal conditions, the proposed photoelectrochemical method could detect acetochlor ranging from 0.5 to 20 μmol L −1 with a detection limit of 0.2 nmol L −1 at a signal-to-noise ratio of 3. The assay results of acetochlor in water samples with the proposed method were in acceptable agreement with those of the gas chromatograph–mass spectrometer (GC–MS) method. The promising sensor opens a new opportunity for fast, portable, and sensitive analysis of acetochlor in environmental samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 1
·185-192
·
IF 3.719
Wang Huiqi,Feng Wei,Jia Qiong
We show that graphene oxide functionalized with 3-aminophenylboronic acid represents a useful new adsorbent for the selective enrichment of the nucleosides, adenosine, guanosine, uridine, and inosine, which then were quantified by capillary electrophoresis. The analytes were separated within 10 min using a borate buffer of pH 9.3 (containing sodium dodecyl sulfate) at an operating voltage of 25 kV, a temperature of 20 °C, a sample injection time of 5 s, and with UV detection at 254 nm. The effects of sample pH, sample flow rate, eluent type, and eluent flow rate were optimized. Under the optimized conditions, the enrichment factor was determined to be 10. A linear relationship was obtained over the 0.1 to 100 μg mL −1 concentration range, with regression coefficients of >0.9991. The intra-day and inter-day relative standard deviations of this method were in the range of 3.1–5.0 % and 4.8–7.5 %, respectively. The method was applied to the determination of the nucleosides in (spiked) traditional Chinese medicine injection samples, and recoveries ranged from 70.8 to 106.7 %.
Graphene oxide functionalized with 3-aminophenylboronic acid was prepared for the enrichment of nucleosides combined with capillary electrophoresis. After optimizing various experimental parameters, the method was successfully applied to the determination of nucleosides in traditional Chinese medicine injection samples.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 5
·1745-1750
·
IF 1.821
Guolin Yuan,Junlin He,Yuan Li,Wailan Xu,Liuliu Gao,Chao Yu
In this work, a novel, ultrasensitive electrochemical immunosensor has been fabricated for the determination of gypican-3 (GPC3) in human serum. A disposable indium tin oxide (ITO) glass array was used as the working electrode on which pyrrole-α-carboxylic acid (Py-α-COOH) was electropolymerised. This approach provided a high content of surface-confined carboxyl groups suitable for the direct covalent binding of GPC3 antibody. In the immunosensor system, the “fluorescence microscopy” technique was first used for the characterisation of carboxyl groups. Meanwhile, the electrode was characterised by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). Using GPC3 as a model analyte, the immunoassay exhibited high sensitivity, acceptable stability and reproducibility with a wide linear range from 0.9 pg mL−1 to 9 ng mL−1 and an ultra-low detection limit of 0.3 pg mL−1 (S/N = 3). The results for real sample analysis in human serum demonstrated that the newly constructed immunosensor array provided a rapid, simple and cost-efficient immunoassay with high throughput and sufficiently low detection limits for clinical applications.
✓ 已验证
产品关联
DOI
高影响因子
TheScientificWorldJOURNAL
·
2013
·
IF 1.73
Wei Lin Li,Shuan Bao Tian,Feng Zhu
A simple and efficient synthetic protocol has been developed for the synthesis of 3-substituted-2H-1,4-benzothiazines by using a novel sulfonic acid functionalized nano-γ-Al2O3 catalyst, devoid of corrosive acidic, and basic reagents. The developed method has the advantages of good to excellent yields, short reaction times, operational simplicity, and a recyclable catalyst. The catalyst can be prepared by a simple procedure from inexpensive and readily available nano-γ-Al2O3 and has been shown to be recoverable and reusable up to six cycles without any loss of activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Ping He,Bohong Chen,Yuhao Wang,Zhengwei Xie,Faqin Dong
Organophilic vermiculite was prepared by ionic exchange reaction between vermiculite and cetyltrimethylammonium bromide, and it was then used as filler to prepare a series of composite gel polymer electrolytes containing poly(methyl methacrylate) and room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate. Surface morphology and structural nature of the composite electrolytes were examined by scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. X-ray diffraction analysis confirmed that organophilic vermiculite decreased the crystallinity of polymer and formed intercalated polymer/layered silicate composite. On the other hand, the dispersion of organophilic vermiculite increased the thermal property of polymer electrolytes. Furthermore, the ionic conductivity and electrochemical window of composite gel polymer electrolyte reached up to the value of 4.01 × 10 −3 S cm −1 and 3.8 V at the adding content of 8 wt.% organophilic vermiculite, respectively.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 84
·68369-68377
·
IF 3.84
Mingyong Du,Caili Dai,Ang Chen,Xuepeng Wu,Yuyang Li,Yifei Liu,Weitao Li,Mingwei Zhao
A novel fluid system composed of 2-methoxycinnamic acid (trans-OMCA) and 1-hexadecyl-3-methylimidazolium bromide (C16mimBr) in an aqueous solution was investigated. The compounds trans-OMCA and C16mimBr in an aqueous solution can self-assemble and form viscoelastic worm-like micelles. The concentrations of trans-OMCA and C16mimBr have a significant influence on the rheological properties of the system. The samples were characterized by rheological measurements. The structural isomerization of trans-to-cis for trans-OMCA occurred after UV light irradiation. The transformation of the system after UV light irradiation was determined by UV-vis absorption spectroscopy, rheological measurement and cryo-TEM observation. Surface tension measurements were carried out to investigate the role of trans-OMCA and UV light in C16mimBr aqueous solution. Critical aggregation concentration (cac), effectiveness of surface tension reduction (Πcac), maximum excess surface concentration (Γmax) and minimum area occupied per surfactant molecule (as) were investigated. Critical packing parameter was introduced to express the mechanism of aggregation behavior transition.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2017
·
IF 4.9
X. Jia,Y.H. Zhao,T. Liu,Y.H. He
Short-term exposure to elevated CO 2 increases cadmium (Cd) uptake in some plant species (wheat, poplars, and willows), which triggers an increase in antioxidative system activity to deal with additional reactive oxygen species that are generated. Here, we examined leaf defenses in Robinia pseudoacacia L. seedlings exposed to elevated CO 2 + Cd for 3 years. Three years of elevated CO 2 decreased Cd uptake into leaves and the Cd content in soils and increased the pH of rhizosphere soil relative to ambient CO 2 . In plants exposed to Cd stress , leaf chlorophyll content was greater under elevated CO 2 than under ambient CO 2 . Superoxide dismutase, peroxidase, and catalase activity increased, glutathione content increased, and malondialdehyde and phytochelatins contents decreased under elevated CO 2 + Cd relative to Cd alone. Proline, soluble sugars, flavonoids, saponins, and phenolic acids contents were greater under elevated CO 2 + Cd than under Cd alone, and condensed tannin content was lower. Overall, long-term elevation of CO 2 enhanced the leaf defense system of R. pseudoacacia exposed to Cd by stimulating antioxidant enzyme activity , osmotic adjustment, and the production of glutathione, flavonoids and phenolic acids. Future research should focus on understanding the mechanisms involved in the decrease in Cd uptake into leaves and Cd content in soils and the increase in rhizosphere soil pH under long-term exposure to elevated CO 2 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Lu Liu,Yiwen Wu,Mengyu Guan,Zhigao Dai,Guogang Li
The luminescence properties of perovskite quantum dots are crucial for their applications in various optoelectronic devices. Enhancing the luminescence performance of CsPb(Br/I) 3 quantum dots is a critical challenge for their application in optoelectronic devices. This paper explores the use of noble metal nanostructures to improve the luminescence intensity of these quantum dots through localized surface plasmon resonance (LSPR). We conducted electric field simulations to optimize the LSPR effect and prepared Au@Ag@SiO 2 nanobipyramids with tailored LSPR peaks. The nanobipyramids were then connected to CsPbCl 2 Br, CsPbBr 3 , and CsPbBrI 2 quantum dots using amine-functionalized SiO 2 layers, forming a nanocomposite that showed a significant increase in luminescence. The study identifies the importance of the SiO 2 spacer layer in preventing luminescence quenching and demonstrates that the LSPR effect can be harnessed to achieve up to a 15-fold enhancement in luminescence intensity. This research provides a promising avenue for advancing the efficiency of solar energy harvesting devices, light-emitting devices, and optical detectors.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xiaoxian Hao,Xin Zhang,Wenjing Wang,Wenjing Liu,Guangming Lu,Wenru Zheng,Dirong Gong,Haichao Zhao
The controlled release of antifouling agents from organic coatings is an effective measure against marine biofouling. In this study, Mg Al layered double hydroxides (LDH), a two-dimensional nanoparticle , were intercalated with the 1,2-benzisothiazolin-3-one-based anions (BIT-COO − ) via an ion-exchange process for achieving controlled release of BIT-based antibacterial agent. Multifunctional X-ray photoelectron spectroscopy, thermogravimetric analyzer, and transmission electron microscopy confirmed the successful loading of BIT intercalated into LDH interlayers. The antibacterial performance of LDH@BIT-COOH was tested by the zone of inhibition method, the plate colony counting method, the turbidity method, and the biofilm method, and results proved that 0.4 mg/mL LDH@BIT-COOH exhibited complete inactivation of E. coli (6 h) and S. aureus (12 h ). The release study of the LDH@BIT-COOH proved that the release time prolonged to 4500 min after loading. The 5 wt% LDH@BIT-COOH coating exhibited outstanding antibacterial and antifouling properties by using bio-laser confocal microscope , and without obvious toxicity as observed by L929 cell test using enzyme marker, showing potential applications in marine antifouling.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL SCIENCES
·
2024
·Vol. 40
·期 7
·1289-1299
·
IF 1.8
Gong Can,Lu Xiang-Ting,Zhang Shi-Ding,Xiao Kun,Xu Xu
Liquid chromatography‒mass spectrometry employing porous graphite carbon columns and an n-octane-isopropanol mobile phase was utilized for the separation of triacylglycerols (TAGs) in various edible oils, aiming to identify lard adulteration in soybean, corn, and sunflower seed oils. Experiments were conducted using a Hypercarb column (2.1 mm × 100 mm, 5 µm) and an n-octane-isopropanol (70:30, V/V) mobile phase at a flow rate of 0.25 mL· min −1 and a column temperature of 60 °C. Detection was achieved through atmospheric pressure chemical ionization-mass spectrometry. Analysis of diverse edible oil samples revealed that oils of the same type shared similar TAG compositions, while different types exhibited distinct TAG profiles. Distinct variations in triglyceride composition were observed across different edible oils. Based on liquid chromatography‒mass spectrometry analysis, the characteristic component 1-stearic acid-2-palmitic acid-3-oleic acid glyceride (SPO), which may also include PSO, was identified in lard through principal component analysis and orthogonal partial least squares discriminant analysis. This component served as a marker for detecting as low as 0.1% lard adulteration in soybean, corn, and sunflower seed oils. The technique offers a precise and effective approach for the identification of lard adulteration in these edible oils. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Ziyang Guo,Liyuan Qin,Haoming Zou,Xiao Ma,Dongliang Wang,Yansong Shi,Xijuan Lv,Yujie Qiang,Wei Guo,Qinghai Shu
This study investigates the corrosion mechanism of carbon steel (CS) induced by high-energy density materials (HEDMs), NTO and AP. CS exhibited corrosion rates of 1.314 mm/y and 8.690 mm/y when exposed to NTO and AP powders, respectively. However, these rates shifted to 9.050 mm/y for NTO and 3.597 mm/y for AP in solution. Experiments combining grand canonical Monte Carlo (GCMC) and ab initio molecular dynamics (AIMD) simulations demonstrate AP’s greater susceptibility to hygroscopicity, establishing a corrosive environment. CS maintains an unabated corrosion rate as Cl - from AP reduction damages corrosion products. Conversely, NTO’s compact corrosion products effectively delay CS corrosion.
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2025
·Vol. 11
·期 3
·
IF 12.5
Yikai Yun,Qing Chang,Jinjian Yan,Yuanyuan Tian,Sijie Jiang,Wenjie Wei,Shaoqun Li,Yuzheng Guo,Jun Yin,Jing Li,Mengyu Chen,Kai Huang,Cheng Li,Rong Zhang
The utilization of low-dimensional perovskites (LDPs) as interlayers on three-dimensional (3D) perovskites has been regarded as an efficient strategy to enhance the performance of perovskite solar cells. Yet, the formation mechanism of LDPs and their impacts on the device performance remain elusive. Herein, we use dimensional engineering to facilitate the controllable growth of 1D and 2D structures on 3D perovskites. The differences of isomeric ligands in electrostatic potential distribution and steric effects for intermolecular forces contribute to different LDPs. The 1D structure facilitates charge transfer with favored channel orientation and energy level alignment. This approach enables perovskite solar modules (PSMs) using 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene to achieve an efficiency of 20.20% over 10 by 10 square centimeters (cm2) and 22.05% over 6 by 6 cm2. In particular, a PSM (6 by 6 cm2) using poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] maintains an initial efficiency of ~95% after 1000 hours under the rigorous ISOS-L-3 accelerated aging tests, marking a record for the highest stability of n-i-p structure modules.
✓ 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）