International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 6
·5421-5430
·
IF 1.5
Yangyang Xi,Peng Zhang,Haining Zhang,Zhaohui Wan,Wenmao Tu,Haolin Tang
Composite membrane separators are fabricated by coating one side of microporous polyethylene membrane with poly(methyl methacrylate) modified titanate nanoparticles that are synthesized through emulsifier-free emulsion polymerization of methacrylate-functionalized titanate nanoparticles. The formed composite membrane separators exhibit great thermal-shrinking resistance due to the introduction of thermal resistant titanate nanoparticles. After immersed into electrolyte solution, the swelling poly(methyl methacrylate) microspheres leads to the formation of gel electrolyte, thus stabilizing the electrolyte. Moreover, the porous structure of the coated layer can facilitate the swelling of electrolyte and the transport of lithium ions. The thus-assembled lithium ion battery shows an improved cycle performance and rate capability.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2017
·Vol. 64
·期 2
·231-238
·
IF 0.935
Jie Wu,Zongmei Wu,Xuejiao Sun,Shichao Yuan,Ruling Zhang,Qingliang Lu,Yueqin Yu
Sodium alginate (SA) was combined with poly( N -isopropylacrylamide) (PNIPAAm) to prepare thermosensitive hydrogels through semi-interpenetrating polymer network (semi-IPN) and fully interpenetrating polymer network (full-IPN). The thermosensitive, swelling, mechanical, and thermal properties of pure PNIPAAm, SA/PNIPAAm semi-IPN, and Ca-alginate/PNIPAAm full-IPN hydrogels were investigated. The formation of semi-IPN and full-IPN significantly improved the hydrogels’ swelling capability and mechanical properties without altering their thermosensitivity. 5-Fluorouracil (5-Fu) was selected as a model drug to study the release behaviors of the hydrogels. It was found that in vitro controlled drug release from semi-IPN hydrogels showed an initial release burst, followed by a slower and sustained release, before reaching equilibrium. Full-IPN hydrogels showed slow and sustained release during the whole process. Temperature and pH were found to affect the rate of drug release. Ca-alginate/PNIPAAm full-IPN hydrogels have potential application as drug delivery matrices in controlled drug release.
研究领域:
生物材料
·
药剂学
·
高分子科学
·
组织工程
·
药物递送系统
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yufen Yan,Yayu Guo,Huadong Zheng,Liang Qi,Yutao Yang,Yanli Miao,Xixi Shi,Lianqi Zhang,Chunliang Li,Dawei Song
Development of sulfide solid-state electrolytes (SSEs) with high ionic conductivity plays a leading role in achieving all-solid-state sodium batteries (ASSSBs). As an important raw material for synthesizing sulfide SSEs, the purity of Na 2 S significantly affects the ionic conductivity and electrochemical properties of sulfide SSEs. In order to obtain high-purity and low-cost Na 2 S, a hydrogen reduction of industrial grade Na 2 SO 4 followed by ethanol purification has been successfully employed to synthesize and purify Na 2 S, which possesses a high purity of 98 %. Na 3 SbS 4 has been synthesized by as-synthesized Na 2 S (A-Na 2 S) and commercial Na 2 S (C–Na 2 S) by liquid-phase synthesis and solid-state reaction methods, respectively. The electrochemical properties indicate that Na 3 SbS 4 samples synthesized by A-Na 2 S possess higher ionic conductivity and lower Ea, and the assembled ASSSBs exhibit higher specific capacities, superior cycle and rate performance. At 0.5C, the assembled TiS 2 /Na 3 SbS 4 /NaSn ASSSB exhibits a high initial capacity of 211.4 mAh g −1 with capacity retention of 96.2 % after 360 cycles at room temperature. This work provides a simple approach for synthesizing high-purity Na 2 S at low cost, enabling the large-scale application of sulfide SSEs for ASSSBs.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
无机合成
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 125
·期 4
·2867-2873
·
IF 1.289
Yehai Yan,Na Lu,Jian Cui,Jinfang Zhang
A new fluorescent copolymer, poly(1-vinylimidazole- co -(1-pyrene) methyl 2-methyl-2-propenote) (VI- co -PyMMP), has been designed and synthesized by a free-radical copolymerization of VI and PyMMP as well as characterized using ultraviolet (UV), Fourier transform infrared spectroscopy (FTIR), 1 H NMR, and fluorescence spectroscopies. The monomer reactivity ratios are determined by two methods of Fineman-Ross ( r 1 = 0.28 ± 0.04 for VI, r 2 = 1.32 ± 0.11 for PyMMP) and Kelen-Tüdös ( r 1 = 0.23 ± 0.05, r 2 = 1.22 ± 0.12). Based on the reactivity ratios, the monomer sequence lengths and Q and e for PyMMP monomer are further calculated. The results suggest that the copolymerization of VI and PyMMP is a nonideal copolymerization without an azeotropic point (i.e., r 1 < 1, r 2 > 1 and r 1 r 2 < 1) and has a low alternation tendency. The conclusions drawn in this work may not only direct the later synthesis of the copolymers but also enrich the database of free-radical copolymerization. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
高分子化学
·
功能高分子
·
荧光材料
·
聚合物合成
·
材料化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 2
·1731-1736
·
IF 2.986
Jingbo Yu,Qian Zhang,Yi Gu,Anxian Lu
In this study, phosphate glasses embedded with Fe 2 O 3 quantum dots were prepared via a conventional melt quenching technology with further heat treatment. The effect of Fe 2 O 3 content on the structural, optical and magneto-optical properties was investigated. The results showed that the addition of Fe 2 O 3 had no obvious influence on the structure units that built up the host glass and the amorphous nature of glass. In the glass matrix , the existence of Fe 2 O 3 quantum dots was confirmed by high resolution transmission electron microscope . Meanwhile, optical study clearly demonstrated a red shift in optical cut-off wavelength resulted from the size quantization effect. The highest Verdet constant (22.33°/T-cm) was measured for the glass containing 1 mol% Fe 2 O 3 , which was ~ 7 times higher than that of the glass matrix. As the increment of Fe 2 O 3 contents, a phase evolution of Fe 2 O 3 quantum dots from amorphous phase to γ-Fe 2 O 3 phase was recorded due to the Ostwald Ripening effect. Interestingly, a concentration quenching phenomenon in Verdet constant was observed along with the phase evolution of Fe 2 O 3 quantum dots. When the content of Fe 2 O 3 is up to 2 mol%, the glass exhibited paramagnetism with the Verdet constant of − 2.833°/T-cm. This finding can provide a new idea for the development of quantum dot embedded magneto-optical glass.
研究领域:
材料科学
·
磁光材料
·
纳米材料
·
无机非金属材料
·
光学玻璃
·
凝聚态物理
✓ 已验证
DOI
高影响因子
Small
·
2017
·Vol. 13
·期 44
·1702011
·
IF 8.643
Chan Cao,Jie Yu,Meng-Yin Li,Ya-Qian Wang,He Tian,Yi-Tao Long
Direct, low-cost, label-free, and enzyme-free identification of single nucleobase is a great challenge for genomic studies. Here, this study reports that wild-type aerolysin can directly identify the difference of four types of single nucleobase (adenine, thymine, cytosine, and guanine) in a free DNA oligomer while avoiding the operations of additional DNA immobilization, adapter incorporation, and the use of the processing enzyme. The nanoconfined space of aerolysin enables DNA molecules to be limited in the narrow pore. Moreover, aerolysin exhibits an unexpected capability of detecting DNA oligomers at the femtomolar concentration. In the future, by virtue of the high sensitivity of aerolysin and its high capture ability for DNA oligomers, aerolysin will play an important role in the studies of single nucleobase variations and open up new avenues for a broad range of nucleic-acid-based sensing and disease diagnosis.
研究领域:
分子生物学
·
基因组学
·
生物传感
·
纳米孔技术
·
精准医学
·
核酸检测
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
·
2018
·Vol. 56
·期 19
·1281-1286
·
IF 2.499
Yan Jie Wang,Chen Yu Li,Zhi Jian Wang,Yiping Zhao,Li Chen,Zi Liang Wu,Qiang Zheng
Development of tough hydrogels has greatly expanded their applications as load-bearing materials. However, the elastic modulus of tough hydrogels is usually lower than 1 MPa. It remains a challenge to design tough hydrogels with high modulus. We report here a series of tough double-network (DN) hydrogels with ultrahigh elastic modulus (up to 200 MPa) by forming robust hydrogen bonds between the first poly(acrylic acid) network and the second poly( N -isopropyl acrylamide) network. The dense cooperative hydrogen bonds greatly reduce the segmental mobility and thus improve the rigidity of gel matrix. Owing to the dynamic nature of hydrogen bonds, the modulus of hydrogels is strongly influenced by temperature and pH, affording the gels shape memory property. The strategy by forming robust noncovalent bonds between interpenetrating networks should be applicable to other systems for designing tough and versatile hydrogels with diverse promising applications. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018 , 56 , 1281–1286
研究领域:
高分子物理
·
生物材料
·
软物质科学
·
智能响应材料
·
组织工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 34
·15881-15891
·
IF 6.97
Yong Xu,Jun Chen,Ze'en Xiao,Caixia Ou,Weixia Lv,Lihong Tao,Shengwen Zhong
A porous composite electrode composed of diatomite-mixed 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) is prepared by electrostatic spinning technology. Compared with traditional coated electrodes without diatomite mixing, the obtained composite electrode materials have higher porosity, larger specific surface area and faster lithium ion transport channels, which makes them exhibit better electrochemical performance, such as smaller impedance, higher capacity, and better cycling stability and rate performance. The electrospun diatomite-mixed 1,4,5,8-NTCDA composite (ED-1,4,5,8-NTCDA) electrode shows an initial coulombic efficiency of 77.2%, which is much higher than that of the electrospun 1,4,5,8-NTCA (E-1,4,5,8-NTCDA) electrode without diatomite mixing (63.8%) and the coated 1,4,5,8-NTCA (C-1,4,5,8-NTCDA) electrode (48.3%). Moreover, the ED-1,4,5,8-NTCDA electrode displays an initial discharge capacity of 1106.5 mA h g−1, which is much higher than that of the E-1,4,5,8-NTCDA electrode (546.0 mA h g−1) and the C-1,4,5,8-NTCDA electrode (185.4 mA h g−1). After 200 cycles, the capacity of the ED-1,4,5,8-NTCDA electrode remains at 1008.5 mA h g−1 with a retention ratio of 91.2%, which is also much higher than that of 753.2 mA h g−1 for the E-1,4,5,8-NTCDA electrode and 288.1 mA h g−1 for the C-1,4,5,8-NTCDA electrode. Even at a higher current density of 1500 mA g−1, its capacity remains above 508.9 mA h g−1. The ED-1,4,5,8-NTCDA electrode presents superior performance, which opens up a promising new approach for further utilization of organic materials as electrode materials in rechargeable lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2021
·Vol. 91
·期 4
·726-731
·
IF 0.868
Xu Y.,Hu Y.,Bao Q.,Zhang J.,Liu B.,Zhang Z.,Zhang Q.,Zhang H.
Copper phyllosilicate has been synthesized from a solution of sodium silicate and copper nitrate by co-precipitation under acidic conditions followed by reduction under H 2 flow for using it as the Cu/SiO 2 catalyst. The catalyst has been characterized by XRD, XPS, FTIR and Raman spectra, EDS, BET, and TEM. It is confirmed that only copper phyllosilicate and SiO 2 exist in the catalyst precursor, and there has been no CuO. Physical and chemical properties of Cu/SiO 2 catalyst have been evaluated. The Cu/SiO 2 catalyst has not only a large specific surface area and abundant mesopores but also the advantages of high dispersion of copper nanoparticles and the combination of Cu 0 and Cu + . The catalyst demonstrates high activity and selectivity in the reaction of 2-butanol dehydrogenation to methyl ethyl ketone.
研究领域:
催化化学
·
材料科学
·
物理化学
·
纳米材料
·
有机合成
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Xu Yan,Xiyou Wang,Wei Gu,MiaoMiao Wu,Yan Yan,Bo Hu,Guangbo Che,Donglai Han,Jinghai Yang,Weiqiang Fan,Weidong Shi
Single-crystalline AgIn(MoO 4 ) 2 nanosheets have been successfully fabricated by facile hydrothermal method without any surfactants. Subsequently, Ag/AgBr-grafted AgIn(MoO 4 ) 2 nanosheets were synthesized by the in situ photoreduction of AgBr/AgIn(MoO 4 ) 2 composites prepared by a deposition–precipitation method. Under visible light irradiation. The Ag/AgBr/AgIn(MoO 4 ) 2 composites exhibit a strong absorbance in the visible region because of the surface plasmon resonance absorption of Ag nanocrystals. Compared with bare AgIn(MoO 4 ) 2 nanosheets, Ag/AgBr nanoparticles and Ag/AgIn(MoO 4 ) 2 composites, a dramatic enhancement in the degradation rate of tetracycline (TC) is observed over the Ag/AgBr/AgIn(MoO 4 ) 2 composites. The immense enhancement of the photocatalytic activity is attributed to the extended absorption in the visible-light region, effective charge separation, and synergistic enhancement induced by surface plasmon resonance (SPR) in the heterostructured Ag/AgBr/AgIn(MoO 4 ) 2 . This study provides new insight into the fabrication of highly efficient and stable ternary metal molybdate based plasmonic photocatalysts and facilitates their practical application to solve environmental issues. The mechanism for the photodegradation of TC over Ag/AgBr/AgIn(MoO 4 ) 2 is discussed in detail.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
无机化学
·
物理化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Haihua Wang,Bei Li,Guiqiang Fei,Yiding Shen,Ke Zhu
We reported herein the synthesis of block copolymers and their application in the in-situ emulsion polymerization of waterborne poly (urethane-acrylate) (WPUA) nanoemulsions based on phase inversion process. The polymerizable surfmers containing terminal unsaturated double bonds (MSA-r) were successfully synthesized via catalytic chain transfer polymerization (CCTP). Random copolymer (MSA-t) prepared through radical polymerization was utilized as control. The structure, surface tension and aggregation behavior of surfmers were characterized. The phase inversion, formation and stability of WPUA nanoemulsions were systematically investigated. Effects of MSA-r surfmer content and BMA/MMA ratio on the water resistance and thermal stability of the corresponding films were also discussed. It was found that the phase inversion mechanism of PUA prepolymer in the presence of MSA-r surfmers is different from conventional polyurethane prepolymer. The addition of MSA-r and MSA-t surfmers alters the rheological behaviors of PUA prepolymer via PUA-surfmer interactions, as well as the phase inversion process. Compared with WPUA/MSA-t emulsion, WPUA/MSA-r nanoemulsion displayed improved stability at higher solid content. The minimum particle size of WPUA/MSA-r nanoemulsion was 88.7 nm and kept almost constant after 12-month storage, while the particle size of WPUA/MSA-t emulsion was 131.3 nm and increased to 178.9 nm. Moreover, the WPUA/MSA-r film possessed improved water resistance and thermal stability.
研究领域:
高分子化学
·
胶体与界面科学
·
材料化学
·
纳米材料
·
功能高分子
·
水性涂料
·
聚合物乳液
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Rongrong Li,Jiaqi Weng,Cuihong Ye,Anguo Ying,Qizhong Zhou,Aiguo Zhong,Hao Chen,Jianguo Yang
The equilibrium solubility of sodium 2,4-diaminobenzene sulfonate in liquid mixtures (methanol + water, isopropanol + water, and 1,2-propanediol + water) were determined at temperatures ranging from (273.15 to 323.15) K. The solubility of sodium 2,4-diaminobenzene sulfonate increased with temperature increment but decreased with the concentrations of methanol, isopropanol or 1,2-propanediol in liquid mixtures. The obtained solubility data were correlated by Apelblat equation and Sun model. On the base of the measured solubility, the dissolution enthalpy ( Δ H sol o ) of the dissolution process were calculated.
研究领域:
药物化学
·
物理化学
·
药剂学
·
溶解行为研究
·
热力学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）