ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Mingshu Xiao,Yanping Tian,Yuhua Yan,Kai Feng,Yuqing Miao
In order to lower the energy barrier and improve the energy efficiency for hydrogen production by splitting water, highly efficient OER catalysts are required. Here, we report the electrodeposition of Ni(OH) 2 /NiOOH in the presence of urea showing the improved electrocatalysis for the hydrogen production in KOH electrolyte. By potential scanning, the Ni(OH) 2 colloid in alkali solution was transformed into the deposited Ni(OH) 2 /NiOOH. The presence of urea facilitates to deposit Ni(OH) 2 /NiOOH with higher electron transfer than the absence of urea, leading to a higher electrocatalytic OER. As supporting electrolyte , KOH exhibits better performance on the electrodeposition of Ni(OH) 2 /NiOOH and their OER electrocatalysis than NaOH. The work shows the potential application using cheap, non-precious metal-based electrocatalysts to overcome the well-known bottlenecks limiting power density of hydrogen fuel cell and energy efficiency of splitting water.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2015
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IF 3.071
Wendi Liu,Tingting Chen,Tianshun Xie,Renhui Qiu
Soybean oil-based thermosets from acrylated epoxidized soybean oil (AESO) with a highly reactive vinyl monomer, N -vinyl-2-pyrrolidone (NVP), as crosslinking agent to replace styrene (St) were formulated for the fabrication of hemp fiber composites. The theoretical miscibility of NVP–AESO and St–AESO systems were discussed based on the group contribution method. The AESO resin with 30 wt% NVP exhibited a slightly higher viscosity than the counterpart with St, while the maximum curing temperature of the former was considerably lower than that of the latter. The composites from 20 wt% NVP resin gained comparable mechanical properties and higher glass transition temperature ( T g ) to the composites with 30 wt% St. Further increase in NVP usage to 40 wt% resulted in the composites with higher tensile strength , tensile modulus , flexural strength , flexural modulus, storage modulus, and T g of 29.6%, 22.4%, 22.5%, 20.6%, 21.6%, and 47.2%, respectively, when compared to those of the St-based composites.
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AICHE JOURNAL
·
2015
·Vol. 62
·期 2
·580-588
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IF 2.748
Zhixing Zhao,Xiao-Qiao Wang,Luting Ling,Cai-Feng Wang,Su Chen
The bottleneck of large-scale production of semiconductor quantum dots (QDs) is how to solve heavy metal ions waste water and the rapid separation during industrial process. A facile strategy for fabricating CdTe@Ca(OH) 2 nanocrystals exhibiting both improved photoluminescence (PL) stability and prolonged PL lifetime via an economical coprecipitating technology is reported herein. The procedure on capping CdTe QDs into Ca(OH) 2 crystals can enable the products to be easily filtrating separation and the content of residual Cd 2+ filtrate solution to be reached to 0.238 ppm level. Also, fluorescent rod-like heterocrystals by addition of saturated CaCl 2 solution is constructed. CdTe@Ca(OH) 2 nanocrystals is utilized further as phosphor powders to construct white light emitting diode (WLED). The WLED presented, here, has good photoelectric properties with color rendering index of 82.4 at 350 mA, a color temperature of 4643 k, and Commission Internationale de L'Eclairage coordinate of (0.3548, 0.3532), belonging to the white gamut, showing great potential in industrial application. © 2015 American Institute of Chemical Engineers AIChE J , 62: 580–588, 2016
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 133
·期 11
·
IF 1.768
Lian Tang,Yi Zheng,Shiyan Chen,Lei Wang,Huaping Wang
Flexible and nonpoisonous X-ray-shielding membranes supported by bacterial cellulose (BC) were prepared, in which X-ray-shielding materials were of microcapsule structure by using polyvinyl alcohol as shell and lead salt as core. The effect of the wall/core interaction and the amount of cross-linking agent were taken into consideration to find the optimal reaction conditions. The morphology, microcapsule size, and lead salt release properties were investigated. After supported by BC, the flexible and potable membranes for X-ray radiation protection were prepared and the shielding properties were evaluated, which indicated a good X-ray-shielding material. We set up a new method to prepare flexible and portable X-ray radiation protection membranes. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43120.
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Nanoscale
·
2014
·Vol. 6
·期 13
·7424-7429
·
IF 6.739
Beibei Zhan,Changbing Liu,Huaping Chen,Huaxia Shi,Lianhui Wang,Peng Chen,Wei Huang,Xiaochen Dong
Three-dimensional graphene foam (3DGF) is a superior sensing material because of its high conductivity, large specific surface area and wide electrochemical potential windows. In this work, hexagonal Ni(OH)2 nanosheets are deposited on the surface of chemical vapor deposition-grown 3DGF through a facial hydrothermal process without any auxiliary reagents. The morphology and structure of the composite are characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Raman spectroscopy, and X-ray diffraction (XRD). Based on the Ni(OH)2/3DGF composite, a free-standing electrochemical electrode is fabricated. Being employed as a nonenzymatic glucose detection electrochemical electrode, it exhibits a high sensitivity (∼2.65 mA mM−1 cm−2), low detection limit (0.34 μM) and excellent selectivity with a linear response from 1 μM to 1.17 mM. The excellent sensing properties of the Ni(OH)2/3DGF electrode may be attributed to the synergistic effect of the high electrocatalytic activity of Ni(OH)2 nanosheets and the high conductivity and large surface area of 3DGF.
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MATERIALS LETTERS
·
2014
·
IF 2.269
Jing-He Yang,Chao Wang,Duo Yang,Xingyun Li,Peng Shang,Yamin Li,Ding Ma
The boron-doped α-Ni(OH) 2 nanoflowers (B-α-Ni(OH) 2 ) with high specific surface area (400 m 2 g −1 ) were synthesized by the one pot liquid-phase method using P123 (EO 20 PO 70 EO 20 ) as template and NaBH 4 as alkali and boron sources. The size of the B-α-Ni(OH) 2 nanoflowers is about 300 nm and there are many porous. The 50 nm nanoplates are the basic structure units of nanoflowers and thickness of the nanosheets is approximately 5 nm. The content of B is about 15% among the Ni, B, O elements and boron exists mainly in the form of BO 2 − , which was confirmed by XPS characterization. B-α-Ni(OH) 2 nanoflowers exhibit a high specific capacitance of ~2296 F g −1 at a charge and discharge current density of 3 A g −1 with excellent cycling ability. The high specific capacitance and remarkable rate capability are promising for applications of B-α-Ni(OH) 2 nanostructures as advanced electrochemical capacitor materials with both high energy and cycling ability.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2014
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IF 1.357
Fen Wang,Bo Yang,Yulin Zhao,Xiali Liao,Chuanzhu Gao,Ruijian Jiang,Bin Han,Jian Yang,Man Liu,Rongguang Zhou
The inclusion complexation behavior of scutellarein (SCUE) with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) has been investigated in both solution and in the solid state. SCUE/HP-β-CD solid system was prepared by suspension method. The formation of SCUE/HP-β-CD complex in aqueous solution was demonstrated by fluorescence spectroscopy, and the Job plot showed a maximum at a molar fraction of 0.5, indicating 1:1 inclusion complexation between SCUE and HP-β-CD. However, SCUE/HP-β-CD inclusion complex was characterized by means of XRD, DSC, 1H, and two-dimensional NMR. Through the complexation between HP-β-CD and SCUE, the water solubility and antitumor activity of SCUE were obviously increased. This satisfactory water solubility and high antitumor activity of the SCUE/HP-β-CD complex will be potentially useful for its application on human colon cancer chemotherapies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
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IF 3.172
Ganggang Chang,Zongbi Bao,Zhiguo Zhang,Huabin Xing,Baogen Su,Yiwen Yang,Qilong Ren
2-Ethyl-1-hexanol has extensive industrial applications in solvent extraction, however, in view of its potential pollution to environment, the removal and recovery of 2-ethyl-1-hexanol is considered an essential step toward its sustainable use in the future. In this work, we report the removal of 2-ethyl-1-hexanol from aqueous solutions containing salts in high concentrations by adsorption on a coal-based activated carbon. Adsorption thermodynamics showed that the experimental isotherms were conformed well to the Langmuir equation. Also it was found that inorganic salts, i.e. MgCl 2 and CaCl 2 in high concentration significantly enhanced the adsorption capacity from 223 mg/g in the deionized water to 277 mg/g in a saline water. This phenomenon of adsorption enhancement could be ascribed to the salt-out effect. Kinetic analysis indicated that adsorption kinetics follows the pseudo-second-order equation and the adsorption rate constants increase with the salt concentration. The dynamic breakthrough volume and adsorbed amount of 2-ethyl-1-hexanol were significantly elevated when the salt is present in the water. The dynamic saturated adsorption amount increased from 218.3 mg/g in the deionized water to 309.5 mg/g in a salt lake brine. The Tomas model was well applied to predict the breakthrough curves and determine the characteristics parameters of the adsorption column.
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JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
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2013
·
IF 2.823
Jian-Yong Zheng,Jia-Yu Wu,Yin-Jun Zhang,Zhao Wang
The mycelium of Aspergillus oryzae WZ007 was successfully developed to kinetic resolution of ( R , S )-ethyl-2-(4-hydroxyphenoxy) propanoate (( R , S )-EHPP) for production of ( R )-ethyl-2-(4-hydroxyphenoxy) propanoate (( R )-EHPP). The key biocatalytic process parameters (pH, temperature, rotation speed and substrate concentration) were optimized. Under the optimum conditions, the optical purity of ( R )-EHPP was improved up to >99% when the conversion was above 49%. A. oryzae WZ007 whole-cell lipase exhibited high reaction capacity, enantioselectivity and good reusability. The tolerable substrate concentration was 0.5 mol/L, and dry mycelium of A. oryzae WZ007 maintains over 80% of its initial activity after eight repeating cycles. Therefore the enzymatic preparation of ( R )-EHPP route was suitable for industrial application.
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Food Analytical Methods
·
2015
·Vol. 8
·期 10
·2605-2611
·
IF 1.956
Peng Juan,Song Shanshan,Liu Liqiang,Kuang Hua,Xu Chuanlai
In order to develop highly sensitive immunoassays for detecting the major peanut allergen, Ara h 2, we prepared six monoclonal antibodies (mAb) with high affinity to Ara h 2. Using mAb 5 as a capture antibody and HRP-labeled mAb 1 as a detection antibody, a sandwich enzyme-linked immunoassay (ELISA) was established with a limit of detection (LOD) of 0.02 ng/mL. An immunochromatographic strip based on these two mAbs was also established with a LOD of 1 ng/mL. Both tests showed high specificity in cross-reactivity experiments. Sample analyses indicated that these two immunoassays were feasible, accurate, and highly sensitive for measuring allergen Ara h 2 of food.
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ACS Sustainable Chemistry & Engineering
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2013
·
IF 0
Zujin Yang,Hongbing Ji
2-Hydroxypropyl-β-cyclodextrin was immobilized onto cellulose with epichlorohydrin as a cross-linker. The obtained polymer, as biomimetic catalyst, was used to mediate synthesis of benzaldehyde in aqueous solution. The functionalized mimetic enzyme played a crucial role on catalytic oxidation of cinnamaldehyde with remarkable substrate conversion and product selectivity. Synergistic effect based on weak interactions between the polymer and the substrate results in significant promotion of the catalytic performance. The catalyst could be recycled without apparent loss of the original activity.
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Evidence-based Complementary and Alternative Medicine
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2015
·
IF 1.88
Yibo Feng,Xiaojuan Zhao,Fang Lv,Jinqiu Zhang,Bihua Deng,Yanhong Zhao,Yuanliang Hu,Deyun Wang,Jiaguo Liu,Yu Lu,Ruonan Bo,Zhenguang Liu
The aim of this study was to optimize the preparation conditions of salidroside liposome with high encapsulation efficiency (EE) and to study the immunological enhancement activity of salidroside liposome as porcine circovirus type 2 virus (PCV-2) vaccine adjuvant. Response surface methodology (RSM) was selected to optimize the conditions for the preparation of salidroside liposome using Design-Expert V8.0.6 software. Three kinds of salidroside liposome adjuvants were prepared to study their adjuvant activity. BALB/c mice were immunized with PCV-2 encapsulated in different kinds of salidroside liposome adjuvants. The PCV-2-specific IgG in immunized mice serum was determined with ELISA. The results showed that when the concentration of ammonium sulfate was 0.26 molL−1, ethanol volume 6.5 mL, temperature 43°C, ethanol injection rate 3 mLmin−1, and salidroside liposome could be prepared with high encapsulation efficiency of 94.527%. Salidroside liposome as adjuvant could rapidly induce the production of PCV-2-specific IgG and salidroside liposome I adjuvant proved to provide the best effect among the three kinds of salidroside liposome adjuvants.
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