ELECTROCHIMICA ACTA
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2013
·
IF 3.777
Yunlei Zhou,Zhenning Xu,Mo Wang,Xiaomeng Meng,Huanshun Yin
A label-free electrochemical immunosensor for sensitive detection of indole-3-acetic acid (IAA) was developed using gold nanoparticles (AuNPs) functionalized with horseradish peroxidase labeled immunoglobulins G (AuNPs-HRP-IgG) as signal amplification probe and rat monoclonal antibody against IAA as capture probe. AuNPs-HRP-IgG could be immobilized and through the interaction between 4-aminophenylboronic acid and a single N-glycosylation site, which exist in the CH2 domain of IgG. The electrochemical immunosensor was characterized by differential pulse voltammetry (DPV) in 0.1 M PBS (pH 7.4) containing Fe(CN) 6 3−/4− as redox probe. The decreased oxidation peak current of Fe(CN) 6 3−/4− was used to monitor the antibody–antigen interaction. The electrochemical immunosensor exhibited a linear range from 1 × 10 −9 to 5 × 10 −6 M with a limit of detection of 5.5 × 10 −10 M (S/N = 3). The proposed electrochemical immunosensor could well discriminate IAA from other phytohormones, such as gibberellin, abscisic acid and salicylic acid. In addition, IAA extracted from leaf of mung bean sprouts was detected using the developed immunosensor for evaluating its applicability, and the recovery was from 93.5% to 106.75%.
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RSC Advances
·
2014
·Vol. 4
·期 81
·42991-42995
·
IF 3.708
He Sun,Haobo Sun,Wei Wang,Handong Jiao,Shuqiang Jiao
Insoluble Prussian blue (IPB), Fe4[Fe(CN)6]3, is synthesized at room temperature and found to achieve a relatively high storage capacity of 146 mA h g−1 (at a 20 mA g−1 rate) as the cathode material for Na-ion batteries with high potential plateaus. XRD, SEM and TEM are employed to characterize the morphology and microstructure of the as-synthesized IPB. First-principles calculation is introduced to study the electrochemical mechanism. Generally, the environmental friendliness and low cost of the material make it possible to be used for large-scale electric storage applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2015
·
IF 2.858
Xuehui Li,Yongming Lu,Wenna Zhang,Shixiong Yuan,Liyuan Zhou,Liming Wang,Qiuying Ding,Dandan Wang,Weiwei Yang,Zhengnan Cai,Yan Chen
Polysaccharide TLH-3 from the fruit body of Tricholoma lobayense Heim has shown outstanding antioxidant activity. In order to further explore it, TLH-3 was successfully modified to obtain a sulfated derivative (STLH-3). The chemical characteristics of STLH-3 and TLH-3 were determined by high performance liquid chromatography and infrared spectroscopy. Antioxidant activity and cytotoxicity of the samples were investigated in vitro . The antioxidant activities of STLH-3 were significantly improved. In the four indicators of antioxidant activity, the 1, 1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion scavenging activities of STLH-3 have exceeded that of Vitamin C (Vc). The cytotoxicity against tumor cells including human cervical carcinoma cell line (HeLa) and human breast cancer cell line (MCF-7) of STLH-3 was obviously stronger than that of TLH-3. STLH-3 had no toxic on human embryonic lung fibroblasts (HELF) cells. These results suggested that STLH-3 would be a promising bioactive macromolecule for potential applications in the field of health care and pharmaceutical.
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PubMed
高影响因子
ECS Electrochemistry Letters
·
2015
·Vol. 4
·期 3
·A29
·
IF 1.789
VanTu Nguyen,YueLi Liu,Xue Yang,Wen Chen
The precursor of Fe2(MoO4)3 has been synthesized by precipitation method, which is used to prepare high-capacity cathode material Fe2(MoO4)3/nanosilver composite for sodium-ion batteries. The silver modifying does not affect the monoclinic structure of Fe2(MoO4)3 but improves its kinetics in terms of discharge capacity and rate capability. AC impedance measurements show that the Ag modification decreases the charge transfer resistance of Fe2(MoO4)3/nanosilver composite cathodes. Electrochemical studies confirm that the Fe2(MoO4)3/nanosilver composite exhibits capacity of 90 mAhg−1, and retains 84.5 % of capacity even after 50 cycles.
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JOURNAL OF MOLECULAR LIQUIDS
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2015
·
IF 2.515
Airong Xu,Yajuan Zhang,Zhiyong Li,Jianji Wang
In the present work, seven 1-allyl-3-methylimizodalium carboxylate ionic liquids (ILs), including 1-allyl-3-methylimizodalium formate [Amim][HCOO], acetate [Amim][CH 3 COO], propionate [Amim][CH 3 CH 2 COO], butyrate [Amim][CH 3 (CH 2 ) 2 COO], glycollate [Amim][HOCH 2 COO], lactate [Amim][CH 3 CHOHCOO]) and benzoate [Amim][C 6 H 5 COO], have been synthesized and characterized. Density ( ρ ) and conductivity ( σ ) have been determined experimentally for these ILs at 298.15 K and atmospheric pressure. Then molar volume ( V m ), standard entropy ( S °), lattice energy ( U POT ) and molar conductivity ( Λ ) of the ILs have been derived from the density and conductivity data. Ionicity of the ILs has been estimated using the Walden plot. Meanwhile, how anionic structure of the ILs affects the volumetric and conductivity properties of 1-allyl-3-methylimidazolium carboxylate ILs has been discussed from the analysis of structure–property relationship.
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RSC Advances
·
2016
·Vol. 6
·期 101
·98761-98767
·
IF 3.289
Liqun Ma,Shaobo Dong,Zijian He,Yulin Yang,Hongge Jia,Yutao Di,Yanan Tang,Yazhen Wang
In order to develop a new silane coupling agent that can be used as coupling agent and initiator, (3-(tert-butylperoxy)propyl)trimethoxysilane was synthesized by using tert-butyl hydroperoxide and (3-chloropropyl) trimethoxysilane. The new reagent was characterized by 1H-NMR, FT-IR and mass spectroscopy. The thermokinetics of the new reagent was investigated, including thermal stability, decomposition constants (Kd), activation energy (Ea), the heat of decomposition (ΔH) and pre-exponential factor (Ad). In addition, the application of (3-(tert-butylperoxy)propyl)trimethoxysilane on modificating nano-TiO2 and initiating polymerization was studied. The structures of the products of modificating nano-TiO2 and initiating polymerization were verified by XPS, FT-IR. The results indicated that the new reagent had the characteristics of a coupling agent and initiator.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 100
·期 1
·265-275
·
IF 2.787
Longwen Wu,Xiaohui Wang,Zhengbo Shen,Longtu Li
The (1− x )BaTiO 3 – x Bi(Zn 2/3 Nb 1/3 )O 3 ( x = 0.01–0.30) ceramics were synthesized by solid-state reactions. The solubility limit was determined to be x = 0.20. A systematic structural transition from a tetragonal phase ( x ≤ 0.034), to a mixture of tetragonal and rhombohedral phases (0.038 ≤ x ≤ 0.20), and finally to a pseudocubic phase ( x ≥ 0.22) at room temperature was identified. Dielectric measurement revealed a ferroelectric ( x ≤ 0.04) to relaxor ( x ≥ 0.06) transition with permittivity peak broadening and flattening, which was further verified by Raman spectroscopy and differential scanning calorimetry (DSC). Activation energies obtained from the Vogel–Fulcher model displayed an increasing trend from ~0.03 eV for x ~ 0.05, to unusually high values (>0.20 eV) for the compositions with x ≥ 0.15. With the increase in Bi(Zn 2/3 Nb 1/3 )O 3 content, the polarization hysteresis demonstrated a tendency from high nonlinearity to sublinearity coupled with the reduction in remnant polarization and coervice field. The deconvolution of the irreversible/reversible polarization contribution was enabled by first-order reversal curve distributions, which indicates that the decreasing polarization nonlinearity with the increase in Bi(Zn 2/3 Nb 1/3 )O 3 concentration could be related with the change from the ferroelectric domain and domain wall contributions to the weakly coupled relaxor behaviors.
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TETRAHEDRON
·
2017
·
IF 2.651
Ling-Ling Wu,Gao H. Yang,Zhi Guan,Yan-Hong He
The Rose Bengal sensitized intermolecular [2 + 2]-cycloaddition of 3-ylideneoxindoles for the synthesis of spirocyclic oxindoles was developed successfully under visible light irradiation conditions. The cycloaddition products were obtained in good yields (up to 93%) with excellent diastereoselectivity and regioselectivity by using a low loading of Rose Bengal (0.125 mol%) as a triplet sensitizer. This work demonstrates the potential benefits of Rose Bengal in visible light catalysis.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Wei Fang,Naiqing Zhang,Lishuang Fan,Kening Sun
Polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite is prepared by nanocasting technique and chemical polymerization method. Bi 2 O 3 nanoparticles are dispersed into CMK-3 matrix, and polypyrrole is coated onto the surface of Bi 2 O 3 @CMK-3. Polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite as an anode material for lithium-ion batteries has an outstanding power capability (321 mAh g −1 at a current rate of 6 A g −1 ) and a significantly improved cycling ability (380 mAh g −1 after 1000 cycles at a current rate of 5 A g −1 ). The greatly enhanced electrochemical performance of polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite is associated with the synergistic effect of highly conductive CMK-3, polypyrrole layer and Bi 2 O 3 nanoparticles. Such a configuration inhibits the aggregation of Bi 2 O 3 nanoparticles and preserves the structure integrity of electrode material, in addition to highly improving the electrical conductivity and maintaining the stable structure of solid electrolyte interface film.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Ruiping Chen,Yan Wang,Saqib Nawaz Khan,Feifei Xing,Simiao Li,Yiheng Rao,Hao Wang,Zengxia Mei
All-inorganic CsPb(I1-xBrx)3 perovskite solar cells (PSCs) have increasingly broken record power conversion efficiency (PCE), however the poor stability in humid environment is still a serious bottleneck. To suppress the humidity-caused rapid transformation from black phase to yellow phase, germanium (Ge) doping is introduced to improve the tolerance factor of CsPb1-xGexI2.85Br0.15 and its photoelectric performance. A combined investigation of the structural and optical properties reveals a successful substitution of lead (Pb) with Ge in the films as well as a champion PCE of 19.70% for the 1% Ge doped PSC. More significantly, the Ge doped device retained 91.5% of its initial efficiency after being stored in air for 500 hours without any encapsulation process, in contrast to the 83.7% for the undoped counterpart.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-12
·
IF 5.3
Xiao Rongsheng,Dai Hongliang,Liu Xingyu,Qi Jingwen,Bao Meishuo,Wang Xingang,Li Mingde,Zhang Wuxiang,Yan Dengxin
A novel colorimetric approach specifically designed to effectively identify the presence of 3-aminophenol (3-AP) in environmental water is introduced. Briefly, a nitrogen-doped carbon-supported cobalt nanozyme (Co@CN-1) was synthesized and utilized to improve the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of peroxymonosulfate (PMS). Comparative catalytic reactions confirmed that the performance of PMS as an activator exceeds that of hydrogen peroxide catalytically by a factor of 3.5. The catalytic reaction parameters underwent optimization, further resulting in the derivation of a linear detection equation for 3-AP, expressed as inhibition rate (IR%) = 3.35[3-AP]—4.36 (0–20 μM, R 2 = 0.994) and IR% = 1.43[3-AP] + 31.87 (20–36 μM, R 2 = 0.992), with the limit of detection (LOD) of 2.84 μM. The linear relationship between 3-AP concentration and the conversion of color to grayscale value (GSV) was established by smartphones, expressed as GSV = 1.28[3-AP] + 147.10 ( R 2 = 0.972). Density functional theory calculations revealed that Co acts as the preferred active site for donating electrons in PMS activation. This work provides a rapid and accurate approach for monitoring 3-AP concentration, enabling real-time analysis and potentially contributing to environmental and ecological studies. Graphical Abstract
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JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xiaoyan Pei,Wangyue Song,Yunlei Shi,Yang Zhao,Zhiyong Li
Pickering emulsions with a stimulus response have been paid extensive concern due to their long-term stability and demulsification on-command. Metal-organic frameworks (MOFs) are expectable emulsifying agents to build Pickering emulsions based on their excellent properties such as high specific surface area, adjustable porosity and pore size. Herein, a novel kind of CO 2 -triggered Pickering emulsions formed by (3-aminopropyl)triethoxysilane (APTES)-functionalized M-MOF-74 (M-MOF-74-APTES, M = Zn, Cu or Mg) has been developed for the first time. It was found that even at the M-MOF-74-APTES amount of 0.5 wt%, the functionalized MOFs could still stabilize the n-hexane-water mixture to construct Pickering emulsions. The as-generated Pickering emulsions could be efficiently demulsified upon bubbling of CO 2 , resulting in complete separation of oil and water phases, but could be restored by subsequent N 2 bubbling under homogenization. Mechanism study indicated that the acid-base reaction of CO 2 with the amino group of M-MOF-74-APTES resulted in the creation of hydrophilic salts, which led to the lowering of particle wettability and broke the stability of the emulsion, causing demulsification of the Pickering emulsion. After removing CO 2 , the emulsion can be reconstructed by the reversible reaction. As an applied example, the Pickering emulsion has been availed as a micro-reaction system and M-MOF-74-APTES as a carrier of Pd(OAc) 2 catalyst to realize the efficient combination of Suzuki-Miyaura reaction, product isolation and reuse of catalysts via alternate bubbling or removing of CO 2 .
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