JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2014
·Vol. 19
·期 1
·229-239
·
IF 2.234
Zhang J. L.,Liu H. D.,Huang L. H.,Tan S. Z.,Mai W. J.,Cai X.
An advanced electrochemical pseudocapacitor material based on reduced graphene oxide and nickel hydroxide (rGO&Ni(OH) 2 ) was prepared by an easy process where ammonia acted as a pre-stabilizer that could be easily removed. The results showed that the agglomeration and re-stacking of rGO could be effectively prevented, resulting in few-layer rGO nanosheet with high specific surface area of 891.22 m 2 /g which could supply large available area for loading nanoparticle. After the incorporation of Ni(OH) 2 nanoparticle, the rGO&Ni(OH) 2 composite owned excellent electrochemical performance thanks to effective prevention of agglomeration and re-stacking of rGO with large size of the sp 2 domain, no residual of pre-stabilizer of ammonia, and tight contact between rGO and Ni(OH) 2 . Specifically, the rGO&Ni(OH) 2 electrode exhibited excellent stability at scan rates from 100 to 300 mV/s. A high specific capacitance of 1,008 F/g was obtained at high current density of 42 A/g in 6 mol/L KOH aqueous electrolyte, and the specific capacitance demonstrated good rate capability. Moreover, rGO&Ni(OH) 2 electrode showed a long cycle life, retaining 74 % specific capacitance after 2,000 cycles at current density of 6 A/g. The advantages of easy process and excellent electrochemical property suggested great potential application of rGO&Ni(OH) 2 in supercapacitors.
An advanced electrochemical pseudocapacitor material based on reduced graphene oxide and nickel hydroxide was prepared by an easy process where ammonia acted as a pre-stabilizer that could be easily removed. The obtained material owned excellent electrochemical property, including high capacitance, good rate capability, excellent stability, long cycle life, etc.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 9
·1059-1067
·
IF 3.719
Zhang Zhihong,Liu Shunli,Kang Mengmeng,Yang Guang,Li Yanshan,Yan Fufeng,He Linghao,Feng Xiaozhong,Wang Peiyuan,Fang Shaoming
We report on a novel nanoarchitecture for use in highly bioactive electrochemical biosensors. It consists of multilayers of nanostructured plasma-polymerized pyrrole (ppPY) and nanosheets of electrically conductive graphene. The ppPY films were deposited by plasma-enhanced chemical vapor deposition on a graphene surface to form nanostructured composites (G-ppPY). The G-ppPY films were then coated with protein (BSA as a model) by adsorption, and then with DNA. The adsorption of protein and DNA on the nanocomposite was studied by electrochemical impedance spectroscopy and with a quartz crystal microbalance. Results demonstrated that the adsorption of biomolecules on G-ppPY films causes a higher variation in its electrochemical properties and adsorbed amount than that on a plain ppPY surface. This indicates that the presence of graphene can enhance the electrochemical activity of ppPY without reducing the sensitivity of biomolecular adsorption.
A novel nanoarchitecture is developed for use in highly bioactive electrochemical biosensors, which is composed of multilayers of nanostructured plasma-polymerized pyrrole and electrically conductive graphene nanosheets. The presence of graphene can enhance the electrochemical activity of ppPY without reducing the sensitivity of biomolecular adsorption.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2015
·Vol. 72
·期 12
·3097-3117
·
IF 1.438
Chen Xiuqiong,Yan Huiqiong,Sun Wei,Feng Yuhong,Li Jiacheng,Lin Qiang,Shi Zaifeng,Wang Xianghui
As a kind of novel hydrophobic drug carrier materials, the drug-loaded nanofibers were successfully fabricated using amphiphilic alginate derivative (AAD) and poly (vinyl alcohol) (PVA) by electrospinning method. The AAD was synthesized by amide linkage attachment of octylamine onto the carboxylic group of alginate, which was characterized by the means of elemental analysis, FT-IR spectrometer, 1 H NMR spectrometer and fluorescence measurement. Experimental results showed the amidation of alginate was successful, in which the degree of modification was 0.27 and the critical aggregation concentration in 0.15 mol/L aqueous NaCl solution was 0.43 mg/mL. The octyl groups of AAD could effectively make alginate chains flexible and enhance chain entanglements through the hydrophobic interactions between octyl groups. In contrast to sodium alginate
(SA)/PVA blend solutions, AAD/PVA blend solutions showed more excellent electrospinnability. Additionally, the different volume ratios of SA or AAD to PVA played an important role in the formation and morphology of the electrospun blend nanofibers. Although the amidation of alginate could not fundamentally alter the spinnability of alginate, the content of alginate in the blend nanofibers was appropriately increased. The new generated drug-loaded AAD/PVA (20/80) blend nanofibers exhibited relatively continuous and uniform nanofibers with the average diameter of 191.72 nm. Compared to the drug-loaded SA/PVA (20/80) blend nanofibers, the drug-loaded AAD/PVA (20/80) blend nanofibers presented a sustained release performance with the slow release of about 76 % λ-cyhalothrin during the initial period of 10 h.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 20
·期 1
·1-8
·
IF 2.446
Zhong Haoxiang,Sun Minghao,Li Yong,He Jiarong,Yang Jianwen,Zhang Lingzhi
The polyacrylic latex (LA132) was firstly reported as a water-soluble binder for LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) cathode in Li-ion battery. The electrochemical performances of NCM cathode with LA132 binder were investigated and compared with the conventional water-soluble sodium carboxymethyl cellulose (CMC) and commercial non-aqueous polyvinylidene difluoride (PVDF). NCM cathode with LA132 binder exhibited a much higher specific capacity of 146 mAh g −1 and capacity retention of 96.4 % after 100 cycles as compared with 122 mAh g −1 /88 % and 121 mAh g −1 /75% for the NCM electrode with CMC and PVDF, respectively. In addition, NCM cathode with LA132 binder exhibited better rate capability than that of CMC and PVDF, e.g., retaining 34.3 % capacity of C/5 at 5 C rate as compared with 28.5 and 10.9 % for CMC and PVDF, respectively.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 9
·1733-1738
·
IF 3.741
Wang Nan,Sun Jianchao,Chen Lijian,Fan Hai,Ai Shiyun
A nanomaterial of the chemical composition Cu 2 (OH) 3 Cl-CeO 2 and with a large surface area is shown to be a viable peroxidase mimetic. It was synthesized by co-precipitation of an aqueous solution containing Ce(III) chloride, Cu(II) chloride and hexamethylenetetramine by adding an ionic liquid. The material was characterized by scanning electron microscopy and X-ray powder diffractometry. The composite possesses peroxidase-like activity and catalyzes the oxidation of the peroxidase substrate 3,3′,5,5′-tetramethylbenzidine by H 2 O 2 to produce a blue product. Based on this finding, a simple, rapid and selective colorimetric method was worked out for the determination of glucose and cholesterol by using the respective oxidases and by quantifying the H 2 O 2 formed. Both glucose and cholesterol can be determined by this method at levels as low as 50 µM.
We found that the newly synthesized Cu 2 (OH) 3 Cl-CeO 2 composite material possesses intrinsic peroxidase-like activity, and this finding was applied to design a rapid and selective colorimetric assay for H 2 O 2 , glucose and cholesterol.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 7
·5263-5269
·
IF 1.569
Zhang Li,Jiang Yanping,Li Xianggao,Wang Shirong,Xiao Yin
Titanium dioxide nanoparticles (NPs) were modified by alkyl methacrylate (alkyl = methyl, butyl, ethylhexyl, lauryl and octadecyl) through graft copolymerization at its surface, respectively. The characteristics of these products were analysed by Fourier transform infrared, thermogravimetric analysis and transmission electron microscopy. The average particle size, zeta potential and electrophoretic mobility of modified NPs were tested in Isopar dispersion system and the water contact angle was also measured. The average particle size of NPs decreased; zeta potential, hydrophobicity and the dispersion stability enhanced with the increase of alkyl chain length. The maximum values of the zeta potential of NPs modified by poly(octadecyl methacrylate) (PSMA/TiO 2 ) electrophoretic particles reached −72.64 mV. The obtained NPs associated with carbon black were employed to prepare the display inks. An electrophoretic display prototype device based on the white–black inks was prepared. The results gave that the device based on NPs treated with poly(lauryl methacrylate) (PLMA/TiO 2 ) presented 357 ms of quick response under an applied 5 V (DC) field.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2015
·Vol. 22
·期 17
·13077-13082
·
IF 2.828
Yang J.,Li X. D.,Meng W. J.,Lu S. Y.,Chen T.,Yan J. H.,Buekens A.,Olie K.
In this study, simulated fly ash containing CuO/CuCl 2 was heated at 350 °C in a flow of N 2 and also in a nitrogen flow containing 10 vol% H 2 , to evaluate the influence of hydrogen adding on dioxin formation. The total polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) output derived from the CuO sample under N 2 and 10 % H 2 was 7.382 and 0.708 ng/g, respectively. As for CuCl 2 , it was 589 and 46.1 ng/g, respectively. The results show that the hydrogen adding has a good inhibition effect on PCDD/F formation; the inhibition rate was higher than 90 % for PCDD/Fs. HCl and NH 3 were detected by Gasmet in the flue gas; the probable inhibition mechanism of hydrogen reaction was proposed, based on our measurements and others’ researches.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2015
·Vol. 293
·期 5
·1475-1481
·
IF 1.865
Dai Caili,Wang Shilu,Du Mingyong,Liu Yifei,Peng Dongxu,Yan Zhihu,Zhao Mingwei
A nonaqueous ionic liquid (IL) microemulsion containing ethylammonium nitrate (EAN), the surfactant TX-100, and cyclohexane was prepared at room temperature, and phase behavior of this ternary system was investigated at 25 ± 0.1 °C. Electric conductivity measurements were performed to identify the microregions of the nonaqueous IL microemulsion. Based on percolation theory, an EAN-in-cyclohexane (IL/O), a bicontinuous, and a cyclohexane-in-EAN (O/IL) microregion were successfully identified using cyclohexane as the titration phase. Dynamic light scattering measurements were used to study the formation of the IL pools. UV–vis spectroscopy using methyl orange as probe material was employed to investigate the micropolarity of the system. The results indicate that the micropolarity of the IL/O microemulsion increases with the EAN content after the IL pools are formed. With this work, we expect to improve the basic understanding of nonaqueous microemulsions.
✓ 已验证
产品关联
DOI
高影响因子
Electronic Materials Letters
·
2015
·Vol. 11
·期 4
·702-706
·
IF 1.98
Han Wen-Song
In this manuscript, the third-generation hyperbranched polyester was synthesized with 2, 2-dimethylol propionic acid as AB 2 monomer and pentaerythrite as core molecule by using step by step polymerization process at first. Then, the Cu-Ag particles were prepared by co-reduction of silver nitrate and copper nitrate with ascorbic acid in the aqueous solution using hyperbranched polyester as template. Finally, the Cu-Ag@Ag particles were prepared by coating silver on the surface of Cu-Ag particles by reduction of silver nitrate. The synthesized hyperbranched polyester and Cu-Ag@Ag particles were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV-vis spectra, x-ray diffraction, Laser light scattering, thermogravimetric analysis (TGA) and SEM. UV-vis spectra results showed that the Cu-Ag@Ag particles had a strong absorption band at around 420 nm. Laser light scattering and SEM studies confirmed that the most frequent particle sizes of Cu-Ag@Ag particles were 1.2 um. TGA results indicated that the Cu-Ag@Ag particles had good thermal stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 3
·1-8
·
IF 1.92
Geng Tong-Mou,Wu Da-Yu,Huang Wei
An acrylic monomer bearing rhodamine 6G group, salicylaldehyde rhodamine 6G hydrazone acrylate (AR6GHS), was synthesized from salicylaldehyde rhodamine 6G hydrazone (R6GHS) and acryloyl chloride in the presence of triethylamine in dry dichloromethane (CH 2 Cl 2 ) at room temperature. The poly(acrylamide- salicylaldehyde rhodamine 6G hydrazone acrylate) (poly(AM-AR6GHS)) was synthesized by a combiation of AR6GHS and a hydrophilic comonomer acrylamide (AM) with 2,2′-azobis(2-methylpropionitrile) (AIBN) as a thermal initiator in tetrahydrofuran (THF). The resultant AR6GHS and poly(AM-AR6GHS) were identified by FTIR and 1 H NMR spectra. The fluorescent characteristic of the poly(AM-AR6GHS) in the aqueous solutions were investigated both in varied pH and in the presence of metal cations. It was found that the copolymeric sensor exhibited “off-on” recognition toward Cu 2+ and Hg 2+ over a wide range of tested metal ions with remarkably enhanced fluorescent intensities. The poly(AM-AR6GHS) had a good linear response between the relative fluorescence intensity and Cu 2+ or Hg 2+ concentration. In addition, upon the addition of Cu 2+ or Hg 2+ into the aqueous solution of poly(AM-AR6GHS), the color changes occurred from colorless to pale pink or pink under visible light, and the emission color of the sensor solution turned from dark to bright greenish yellow or orange yellow under the UV light at 365 nm.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 51
·期 5
·2727-2738
·
IF 2.371
Wu Xiwen,Liu Libin,Fang Wenyuan,Qiao Congde,Li Tianduo
Abstract In this work, we synthesized two kinds of polyurethanes with azobenzene as hard segments in the side chains and in the main chains. Their thermal stabilities were high enough for their shape memory application. For polyurethane with azobenzene in the side chain (PU), the azobenzene has more distinctly effect on inhibiting crystallization of polycaprolactone (PCL) because of irregular orientation of azobenzene. For polyurethane with azobenzene in the main chain (PUR), the crystallinity of PCL is mainly affected by its molecular weight. PU-3500 and PUR-3500 exhibit perfect shape fixing ability of 99 % with recovery ratio of 98 % at 50 % strain. The recovery ratio is decreased for PU-3500 and increased for PUR-3500 as the applied strain increased. The mechanism of the hard segment structures effect on the shape memory behavior is briefly discussed. Importantly, the two molecules behave trans–cis isomerization under UV irradiation. This work is crucially important for the structural design of shape memory polyurethane and applications in the smart devices. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2015
·Vol. 13
·期 1
·73-80
·
IF 1.298
Pi Pihui,Chen Xi,Wen Xiufang,Xu Shouping,Cheng Jiang
An ambient-temperature self-crosslinkable acrylic resin was synthesized by solution polymerization, with ethanol as solvent; butyl acrylate (BA), methyl methacrylate (MMA), acrylic acid (AA), hydroxypropyl acrylate (HPA), and diacetone acrylamide (DAAM) as monomers; and adipic acid dihydrazide (ADH) as crosslinker. The resin could be diluted by water. The resin was used for PE film ink, and its curing behavior and film properties were studied. FTIR and DSC results indicated that the reaction between ketone carbonyl and hydrazine groups could occur during film curing at ambient temperature and improved glass transition temperature ( T
g ) of the film by 12.67°C. Crosslinking density of film increased with DAAM content and m (ADH)/ m (DAAM) ratio. Adhesion on PE film increased with DAAM content, while it first increased then decreased with m (ADH)/ m (DAAM) ratio. Water absorption of film decreased with DAAM content, while it first decreased then increased with m (ADH)/ m (DAAM) ratio. The optimal m (ADH)/ m (DAAM) ratio and DAAM content in this experiment are 0.8:1 and 2%, respectively. Compared with ambient-temperature self-crosslinkable emulsion, this water-soluble resin shows film not only with the same adhesion, but also without any shrinkage void, indicating better film-forming ability on PE film. The ambient-temperature self-crosslinkable water-soluble acrylic resin shows excellent potential application in water-based ink for PE film because of good film-forming ability and adhesion and low water absorption.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）