BIOSENSORS & BIOELECTRONICS
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2013
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IF 5.437
Shuang Dai,Qingwang Xue,Jing Zhu,Yongshun Ding,Wei Jiang,Lei Wang
An ultrasensitive fluorescence method for determination of protein is developed based on hybridization chain reaction (HCR). In this assay, the streptavidin-magnetic nanobeads were conjugated to biotinylated initiators and biotinylated anti-IgG. In the presence of human IgG, the magnetic nanobeads were fixed on the substrate and the carried initiators propagated the chain reaction of hybridization to form the nicked polymers. Because the nanobead probe carries with a large number of oligonucleotides per protein binding event, there is obvious amplification in the nicked polymers. Then, numerous SYBR Green I molecules were intercalated into the grooves of the long dsDNA polymers, generating a substantially apparent increase in the corresponding fluorescence intensity . With HCR amplification and magenetic nanobead to preamplify the fluorescence signal and reduce the background signal, the detection limit of this assay was 14 aM. Compared with the reported protein detection methods, our method exhibited ultrahigh sensitivity. In addition, the proposed method possessed excellent selectivity and low matrix effect . What is more, the assay was also studied for clinical application in human serum with a satisfactory and reliable result.
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高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Hong Dai,Lingshan Gong,Guifang Xu,Shupei Zhang,Shuanyan Lu,Yuwei Jiang,Yanyu Lin,Longhua Guo,Guonan Chen
A simple and sensitive electrochemical sensor which was constructed with alkoxy silane and carbon nanohorns was first utilized to detect some food borne contaminants, including malachite green, sudans, triclosan, bisphenol A. Due to the large surface area, good conductivity, admirable electrochemical activity of carbon nanohorns and excellent immobility of alkoxy silane, the synergistic effect root from the easily controlled composition of organic–inorganic hybrid film was achieved. The present work demonstrated this functional film brings advantageous features such as stable and strong adherence to electrode matrix and excellent electrochemical catalysis, to electrochemical sensor to achieve advanced application. By choosing triclosan and malachite green as object, their kinetic parameters on this modified electrode were calculated and the relative quantitive protocols were established. Compared with previous reports, the designed sensor presented lower detection limit, higher sensitivity and more broad linear range. This electrochemical platform offered a useful tool for the on-site determination of food born contamination.
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Journal of Nanomaterials
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2015
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IF 1.644
Xiaobin Fang,Yingqi Xu,Jinming Zhang,Xianghong Lu,Yitao Wang,Meiwan Chen
A novel amphiphilic derivative of chitosan, namely, a linoleic acid-g-quaternary chitosan (LA-g-QC), was designed and synthesized as low toxic material for biomedical applications in this study. The chemical structure of LA-g-QC was characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H-NMR), and elemental analysis. LA-g-QC could form nanosized micelles with self-assembly, which was confirmed by the results of critical micelle concentration (CMC) via fluorescence spectroscopy. The average size of LA-g-QC was 140 nm and its zeta potential was approximately +35.50 mV. CMC value was 31.00 mg/mL. Furthermore, LA-g-QC micelles, at final concentrations between 0.94 μg/mL and 30 μg/mL, did not inhibit the proliferation of HepG2 or SMMC 7721 cell lines. Taken together, LA-g-QC has low cytotoxicity and high potential for the preparation of novel drug-delivery micelles.
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JOURNAL OF POWER SOURCES
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2013
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IF 4.675
Liping Zhao,Li Qi,Hongyu Wang
Sodium titanate nanotube (Na-TNT) sample has been prepared by a hydrothermal method using TiO 2 and NaOH as starting materials and then calcined at 400 °C in air. X-ray diffraction and N 2 adsorption–desorption tests have been employed to characterize its crystal and pore structure . The Na-TNT can be used as the negative electrode for electric energy storage devices using Na + -based organic electrolytes. The charge storage mechanism at the Na-TNT negative electrode has been investigated by electrochemical tests (galvanostatic charge–discharge, cyclic voltammetry , etc.), ex-situ XRD and HRTEM measurements. The electric energy storage devices of Na-TNT/graphite have been constructed and the influence of graphite/Na-TNT mass ratio on their performance has been studied.
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ACS Applied Materials & Interfaces
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2015
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IF 6.723
Xiaoli Zhang,Jinbao Zhang,Kai Wang
Nanostructured Co3O4 doped with Zn2+, Ni2+, and both were directly grown on an ITO substrate by an easily available hydrothermal method. The doped Co3O4 showed a unique structural morphology evolution upon controlling the doping elements and the doping ratio of the cations. For the codoped samples, the novel rhombus-shaped Co3O4 nanosheets doped with Zn2+ and Ni2+ (concentration ratio of 1:2) exhibited the optimal electrocatalytic performance. The sample showed a current density of 165 mA cm–2 at 1.75 V, approximately 1.6 and 4 times higher than that of samples doped with Zn2+ and Ni2+ at a concentration ratio of 1:1 and 1:3. The unique architecture and its corresponding modified physical properties, such as high active-site density created by codoping, large structural porosity, and high roughness, are together responsible to its superior performance. For codoped Co3O4 nanostructures, Zn2+ facilitates the creation of Co cations in their high oxidation state as active centers, while Ni2+ contributed to the new active sites with lower activation energy. The synergistic effect of Zn2+ and Ni2+ doping can explain the improved physicochemical properties of codoped Co3O4 nanostructures.
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ULTRASONICS SONOCHEMISTRY
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2015
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IF 4.321
Xiaoming Luo,Limin He,Hongping Wang,Haipeng Yan,Yahua Qin
The motion of a single water droplet in oil under ultrasonic irradiation is investigated with high-speed photography in this paper. First, we described the trajectory of water droplet in oil under ultrasonic irradiation. Results indicate that in acoustic field the motion of water droplet subjected to intermittent positive and negative ultrasonic pressure shows obvious quasi-sinusoidal oscillation. Afterwards, the influence of major parameters on the motion characteristics of water droplet was studied, such as acoustic intensity, ultrasonic frequency, continuous phase viscosity, interfacial tension, and droplet diameter, etc. It is found that when the acoustic intensity and frequency are 4.89 W cm −2 and 20 kHz respectively, which are the critical conditions, the droplet varying from 250 to 300 μm in lower viscous oil has the largest oscillation amplitude and highest oscillation frequency.
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ELECTROCHIMICA ACTA
·
2014
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IF 4.086
Chun Tang,Zonghua Pu,Qian Liu,Abdullah M. Asiri,Xuping Sun
In this paper, we demonstrate the first preparation of NiS 2 nanosheets array on carbon cloth (NiS 2 NA/CC) via sulfidization of its Ni(OH) 2 NA/CC precursor. As a 3D hydrogen evolution cathode, the NiS 2 NA/CC electrode shows excellent catalytic activity and stability in neutral solutions. It needs overpotentials of 193 and 243 mV to afford current densities of 2 and 10 mA/cm 2 , respectively. This electrode also works efficiently in basic solutions.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2015
·Vol. 163
·期 3
·G26
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IF 3.266
Binbin Huang,Jie Chen,Shuzhong Zhan,Jianshan Ye
Here we report a novel approach to synthesize Schiff base metal complex with different shape and size on conductive substrate by electrochemical deposition. Deposition can be microrod clusters or octahedral particles or spherical particles through different electrolytic experimental conditions. UV–visible spectroscopy and cyclic voltammetry were used to study the mechanism of the electrodeposited process. The deposition was characterized by scanning electron microscopy (SEM), high resolution mass spectrometer (HRMS), infrared spectroscopy, UV–visible spectroscopy and X-ray photoelectron spectroscopy (XPS). The microrod clusters and octahedral particles/spherical particles are confirmed to be Schiff base cobalt complexes corresponding to CoL and H2CoL2, respectively (H2L: Bis[Salicylydene]-1,2-Iminophenylenediamine). A probably two-step mechanism of the electrodeposited process had been established and a three-dimensional nucleation model is proposed.
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GREEN CHEMISTRY
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2014
·Vol. 16
·期 8
·3881-3889
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IF 6.852
Chenhua Shu,Tonghua Sun,Qingbin Guo,Jinping Jia,Ziyang Lou
In order to improve the desulfurization efficiency, an ionic liquid (IL) was used as the solvent for the desulfurization of diesel fuel with nickel boride. The nickel boride prepared in IL–H2O showed high specific surface area. The desulfurization efficiency of model organosulfur compounds in this work was higher than that in the previous studies. The desulfurization reactivity of model organosulfur compounds followed the order of BT (DBT) > 3-MBT > 4,6-DMDBT. Furthermore, the products of model organosulfur compounds after desulfurization were analyzed by GC/MS and their corresponding reaction routes were proposed. The effectiveness of nickel salts followed the order of NiCl2 (Ni(OAc)2) > NiSO4 > Ni(NO3)2. The desulfurization efficiency of model diesel fuels reached 90.6% under the conditions of B/S molar ratio = 9, Ni(OAc)2/S molar ratio = 3, oil/IL volume ratio = 3, water content in IL = 5%, and reaction time = 50 min. ILs maintained their original structures after regeneration. Finally, the desulfurization of real diesel fuel was carried out and a desulfurization efficiency of 88.6% was obtained in 50 min.
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DYES AND PIGMENTS
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2017
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IF 3.473
Yanhua Lai,Ping Zhao,Zhan Zhang,Bai Li,Junchen Wu
The self-assembled peptide cargo carrier with the ability of probe offered an effective strategy to deliver and track the anticancer drug, cisplatin (DDP) in ovarian cancer cells. This simple peptide system containing a pyrene fluorogen and arginine-glycine-aspartic acid (RGD) sequence could be utilized to release DDP in situ by the specific recognition between an RGD motif and α v β 3 integrin that was over-expressed on ovarian cancer cells. Importantly, we found that the disassembly-triggered peptide nanofibers , PA1, could effectively combine with DDP and release DDP in the cytoplasm with the pyrene fluorescence restoring. Moreover, the peptide cargo carrier efficiently penetrated tumour cells for enhancing therapeutic efficacy. Our system could open the door for the delivery of anticancer drug in cancer-related therapy.
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Advanced Energy Materials
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2017
·Vol. 7
·期 15
·1700034
·
IF 16.721
Leyuan Zhang,Liang Chen,Hao Luo,Xufeng Zhou,Zhaoping Liu
To develop high-power and high-energy batteries with a long life remains a great challenge, even combining the benefits of metal (fast kinetics and high capacity) and carbon materials (robust structure). Among them, Al-ion batteries based on aluminum anode and graphite carbon cathode have gained lots of interests as one of the most promising technologies. Here, it is demonstrated that the size of graphitic material in ab plane and c direction plays an important role in anion intercalation chemistry. Sharply decreasing the size of vertical dimension ( c direction) strongly facilitates the kinetics and charge transfer of anions (de)intercalation. On the other hand, increasing the size of horizontal dimension ( ab plane) contributes to improving the flexibility of graphitic materials, which results in raising the cycling stability. Meanwhile, chloroaluminate anions are reversibly intercalated into the interlayer of graphite materials, leading to the staging behaviors. In the end, an ultrafast Al-ion battery with exceptional long life is achieved based on large-sized few-layer graphene as a cathode and aluminum metal as an anode.
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Journal of Cleaner Production
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2017
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IF 5.715
Bo Niu,Zhenyang Chen,Zhenming Xu
Waste printed circuit boards (WPCBs) are valuable urban ore for recycling. Many efforts have been done to recover resources from basal boards of WPCB. In addition to basal boards, WPCBs contain many electronic components. However, the recycling technology for electronic components has been poorly developed. This study proposed an integrated and environment-friendly technology for recycling waste tantalum capacitors (WTCs) of WPCBs. Firstly, the WTCs were treated by argon pyrolysis to decompose mold resin. The pyrolysis temperature of 550 °C and holding time for 30 min were considered as the optimal parameters. Then, the pyrolysis residues were performed by crush and magnetic separation to recover nickel-iron terminals. Finally, chloride metallurgy (CM) was used to recover rare metal tantalum (Ta). The Ta recovery rate could reach 92.87 ± 0.36%. The optimal parameters were determined as temperature of 493 °C, adding FeCl 2 ·4H 2 O of 53 wt% and holding time for 150 min based on the response surface methodology (RSM). This study exploits an efficient approach for recycling WTCs and provides a reference for future industrial application.
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危险品化学品经营许可证（带存储）