ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Yuxiao Li,Meishan Zhang,Xueyan Wang,Zhun Li,Lianhua Zhao
Sulfonated poly (ether ether ketone) (SPEEK, SP) with tetraethoxysilane (TEOS) and diethylethylammonium trifluoromethanesulfonate ([dema] [OTf]) were used to make SP/SiOx/OTf inorganic–organic composite membranes by the sol–gel method. The composite membranes were studied with respect to their structural, thermal, ionic liquid leeching (ILs), mechanical, and proton conduction properties. Fourier transform infrared spectroscopy (FT-IR) results showed that there exist intermolecular forces between the sulfonic groups, silica, and ILs in the composite membrane. Thermogravimetric (TG) results showed that the thermal stability of the SP/SiOx/OTf composite membrane is better than that of the pristine SPEEK membrane. IL leaching studies showed that the sulfonic group could help to reduce the loss of ILs. The introduction of silica in the SP/SiOx/OTf composite membrane could further reduce the loss of ILs, and also reduce the swelling degree of the composite membrane. Dynamic mechanical analysis (DMA) data showed that the introduction of silica can increase the flexibility of membranes, and improve the mechanical properties. A proton conductivity of 2.003 × 10 −2 S/cm was obtained for a 50 wt% [dema][OTf] doped SP-66/SiOx/OTF-50 composite membranes at 220 °C under anhydrous conditions.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
电化学
·
膜科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Nan Sun,Hongjin Sun,Dongchen Tan,Qinglei Guo,Zhe Zhang,Zhiyuan Tao,Chengcheng Fang,Jingyuan Bu,Jijie Huang,Chengming Jiang
Transparent and flexible electronics research is a lively and promising domain that holds immense potential for a plethora of innovative applications in consumer electronics, healthcare, and renewable energy sectors. It would be extremely beneficial to develop internal energy sources that are transparent and do not alter the visual appearance would. In this study, we introduce the design of a transparent and flexible zinc-ion solid-state battery (TFZSB), all of whose component elements, such as the electrode, electrolyte/diaphragm, and packaging, are made of transparent and soft materials. The electrodes have been constructed with a framework of nanotube (NT) networks, while the electrolyte is built from a polyacrylamide (PAM) hydrogel material. The suggested electrode design effectively leverages the outstanding optical properties and flexibility of the NT network, while the construction assimilates the PAM hydrogel for providing electrical protection and fabricate the electrolyte, culminating in a resilient interface, which confers exceptional electrochemical stability under varying mechanical strains. With a strong visible-light spectrum transmittance of >80 % and a retention Coulombic efficiency of >92 % under large-scale strains, the TFZSB demonstrates a mass specific capacity of 122.6mAh/g. This TFZSB constitutes a breakthrough in the realm of wearable and smart electronics, and holds the potential to unlock a multitude of opportunities in the future by bridging the domains of energy storage and flexibility/transparency.
研究领域:
材料科学
·
电化学
·
能源存储
·
柔性电子学
·
纳米科技
·
高分子材料
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xuefeng Liu,Shijie You,Nanqi Ren,Hao Zhou,Jinna Zhang
This study reports the development of complete solar-driven dual-photoelectrode fuel cell (PFC) based on WO 3 photoanode and Cu 2 O photocathode with peroxymonosulfate (PMS) serving as cathodic electron acceptor . As indicated by photoelectrochemical measurements, the PMS was able to improve thermodynamic properties of photocathode, achieving an increased open circuit potential from 0.42 V to 0.65 V vs standard hydrogen electrode (SHE). Under simulated sunlight irradiation (~100 mW cm −2 ), the maximum power density of 0.12 mW cm −2 could be obtained at current density of 0.34 mA cm −2 , which was 8.57 times of that produced by PFC without PMS (0.014 mW cm −2 ). Correspondingly, adding PMS (1.0 mM) increased overall removal efficiency of 4-chlorophenol (4-CP) from 39.8% to 96.8%, accounting for the first-order kinetic constant ( k =0.056 min −1 ) being 6.67 times of that in the absence of PMS ( k =0.0084 min −1 ). Radical quenching and electron spin-resonance (ESR) results suggested the contribution of free radicals (•OH and SO 4 •- ) and non-radical pathway associated with direct activation of PMS by Cu 2 O photocathode. Fourier transformed infrared (FTIR) analysis confirmed the strong non-radical interaction between Cu 2 O photocathode and PMS, resulting in 4-CP removal via activation of PMS by surface complex on Cu 2 O. The proof-in-concept complete solar-driven dual-photoelectrode fuel cell may offer an effective manner to realize water purification and power generation, making wastewater treatment more economical and more sustainable.
研究领域:
环境科学
·
光催化
·
能源材料
·
电化学
·
水处理技术
·
可持续能源
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Kaitong Liu,Jian Han,Fuming Li,Congcong Jin,Zhihua Yang,Miriding Mutailipu,Shilie Pan
A case of hydrous borate with the formula of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O was synthesized by the traditional hydrothermal method . It crystallizes in the chiral P 1 space group and has a unique two-dimensional 2 [B 13 O 19 (OH) 5 ] ∞ layer that is constructed by the hydrogen involved [B 13 O 22 (OH) 5 ] fundamental building blocks (FBBs). The Ba atoms and H 2 O molecules are filled in the three-dimensional pore constructed by the 2 [B 13 O 19 (OH) 5 ] ∞ layer. Interestingly, Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is the first case of hydrous borates that has the above rare [B 13 O 22 (OH) 5 ] FBB and 2 [B 13 O 19 (OH) 5 ] ∞ layer, which enriching the structural chemistry of borate system. The diffuse reflection spectrum result shows that the ultraviolet (UV) cutoff edge of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is below 200 nm. Its second harmonic generation (SHG) response is approximately 1.0 times that of potassium dihydrogen phosphate at the 1064 nm fundamental wavelength and it is also phase-matchable. Both results indicate that the title compound is a nonlinear optical crystal for UV spectral region. Theoretical simulation calculation shows that the occupied VE states are mainly contributed by the O-2p orbitals, and therefore [B 13 O 22 (OH) 5 ] groups are the main sources of SHG effects.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Puhong Wen,Lili Ai,Fenyan Wei,Dengwei Hu,Jingjing Guo,Fangyi Yao,Taotao Liu
The crystalline hexagonal Nb 2 O 5 (H-Nb 2 O 5 ) nanobelt clusters dominantly exposed (− 110) facet are firstly synthesized by a hydrothermal topological reaction with a precursor of fiber-like K 2 Nb 2 O 6 ·H 2 O. The structure and morphology of samples obtained at different temperatures and times are investigated. There are two steps in the synthesis process. One is the acid-exchanging reaction transforming into amorphous phase protonated niobate (HNO), and the other is dehydration reaction transforming into H-Nb 2 O 5 , and simultaneous dissolution reaction which forms nanobelt cluster morphology from the fiber-like particle. The formation mechanism of H-Nb 2 O 5 nanobelt clusters has been proposed in detail. After photo-reduced reaction between the H-Nb 2 O 5 nanobelt clusters and AgNO 3 solution, the dominantly exposed (− 110) facet of H-Nb 2 O 5 nanobelt is homogeneously covered by Ag nanoparticles . The photo-electrochemical performance of the obtained H-Nb 2 O 5 nanobelt clusters and Ag deposited H-Nb 2 O 5 (Ag-Nb 2 O 5 ) nanobelt clusters as photocatalysts are evaluated by splitting water under simulated sunlight illumination, and the generated photocurrent of Ag-Nb 2 O 5 sample is 10.73 μA, which is 535 times that of the H-Nb 2 O 5 sample. The results demonstrate that the Ag-Nb 2 O 5 nanobelt clusters have a high photo-electrochemical performance as well as good sunlight photoelectric conversion efficiency.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体材料
·
电化学
·
太阳能转换
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 12
·11953-11960
·
IF 1.5
Benzhi Liu,Jinlong Yan,Min Wang,Xiangyang Wu
Molecularly imprinted polymers were prepared on the surface of acrylamide-functionalized multi-walled carbon nanotubes by thermal polymerization, which using nonylphenol as template molecule, methacrylic acid as functional monomer and ethyleneglycol dimethacrylate as crosslinking agent. The molecularly imprinted polymers were modified on the surface of glassy carbon electrode to prepare electrochemical sensor. The proposed sensor showed a linear range of 0.1 to 30 μM with a detection limit of 0.02 μM. The sensor exhibited good stability, selectivity and high sensitivity to nonylphenol detection. It was successfully applied to detect nonylphenol in water samples.
研究领域:
分析化学
·
环境监测
·
材料科学
·
电化学
·
传感器技术
✓ 已验证
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2015
·Vol. 50
·期 4
·312-318
·
IF 0.935
Yadong Hu,Yinghua Zhou,Xurong Xu,Ruikang Tang
The evolution of amorphous calcium carbonate (ACC) into crystals in ethanol/water binary solvents under ambient temperature was investigated, and it was found to depend on the volume ratio of ethanol to water (R). Calcite remained dominant when the amount of water was high (R = 1/3). A slight change in the amount of ethanol (R = 3/1) could lead to a dramatic change in the polymorph from calcite to aragonite. However, when poly (allylamine hydrochloride) (PAH) was added at R = 3/1, almost pure vaterite could be obtained, which has a specific morphological variation (from hollow microspheres to cloud-like). This study provides an alternative polymorphic route for the CaCO 3 mineral by using the evolution of ACC in different solvent environments, which provides some useful clues for understanding the importance of kinetic control of the morphologies and polymorphs of a wide range of inorganic materials. In addition, this simple mild phase-controlled synthetic method could be scaled up as a green chemistry route for the industrial production of different polymorphs of CaCO 3 .
研究领域:
材料化学
·
结晶学
·
纳米材料
·
生物矿化
·
绿色化学
·
功能材料
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Xue-Dong Xiao,Lin Shi,Li-Hui Guo,Jun-Wen Wang,Xiang Zhang
The supramolecular interaction between the water-soluble pillar[5]arene (WP[5]) as host and dopamine hydrochloride (DH) as guest was studied by spectrofluorometry . The fluorescence intensity of DH gradually decreased with increasing WP[5] concentration, and the possible interaction mechanism between WP[5] and DH was confirmed by 1 H NMR, 2D NOESY , and molecular modelling. Based on significant DH fluorescence, a highly sensitive and selective method for DH determination was developed for the first time. The fluorescence intensity was measured at 312 nm, with excitation at 285 nm. The effects of pH, temperature, and reaction time on the fluorescence spectra of the WP[5]-DH complex were investigated. A linear relationship between fluorescence intensity and DH concentration in the range of 0.07–6.2 μg mL − 1 was obtained. The corresponding linear regression equation is Δ F = 25.76 C + 13.56 (where C denotes the concentration in μg mL − 1 ), with the limit of detection equal to 0.03 μg mL − 1 and the correlation coefficient equal to 0.9996. This method can be used for the determination of dopamine in injection and urine samples. In addition, the WP[5]-DH complex has potential applications in fluorescent sensing and pharmacokinetics studies of DH.
研究领域:
分析化学
·
超分子化学
·
药物代谢
·
生物分析
·
药代动力学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Junwang Zhang,Lili Song,Kunlan Li,Qingda An,Hao Ma,Liyu Yang,Ligang Wei
Water addition was found to enhance the thermal stability of alkylimidazolium–acetate ionic liquids (ILs). Especially in the case of high water content (30–50 wt%), few decomposition products can be observed in the 1 H NMR spectra even after treatment for 24 h at 150 °C. On the basis of this finding, lignin treatment of water and acetate IL mixtures (50–90 wt% IL content) were investigated at 150 °C. The addition of water, as opposed to pure IL treatment, can inhibit the lignin depolymerization into small fragments. Lignin degradation and the structure of regenerated lignin are more affected by cation types of ILs rather than the IL contents and pH values. In the case of 50–70 wt% 1-ethyl-3-methylimidazolium acetate–water system, the specific inter-unit linkages of lignin can be broken down, and regenerated lignin with a narrow polydispersity index (5.0–9.6) can be obtained.
研究领域:
绿色化学
·
生物质转化
·
高分子化学
·
离子液体化学
·
木质素化学
·
可持续材料
·
热化学转化
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yan-zhen Shen,Xun-liang Wang,Yu-xiang Jia,Meng Wang
The endowment of perm-selectivity for specific ions will further extend the applications of heterogeneous membrane. In this work, a side-chain type weak cationic polyelectrolyte, PVDF-g-PVP, was synthesized for surface hydrophobilization of heterogeneous anion-exchange membrane (AEM) in order to impart perm-selectivity between specific anions with different Gibbs hydration energy. After microstructure observation and chemical composition analyses by SEM, AFM, EA and FTIR, the perm-selectivity between specific anions, electrical resistance, transport number, limiting current density, surface homogeneity, as well as salt permeability of the modified AEMs were investigated. Series of electrodialysis experiments in SO 4 2– /Cl – system indicated that a significant perm-selectivity was indeed achieved by the attachment of PVDF-g-PVP coating. In particular, it was worth noting that only a small loss of membrane conductivity was observed after the functionalization. This should be closely related to the micro-phase separation morphology of the coating layer which was induced by the polarity difference between the main chains and side chains of PVDF-g-PVP. Besides, the chronopotentiometric analyses indicated surface homogeneity of the heterogeneous AEM was significantly enhanced and then effectively ameliorated concentration polarization behaviors at the membrane-solution interface. Meanwhile, the perm-selectivity for co-ions was also improved and suppressed back diffusion behaviors of salt driven by concentration gradient. In brief, the modifying scheme proposed in this work can effectively improve comprehensive transport properties of conventional heterogeneous AEM.
研究领域:
膜科学与技术
·
高分子材料化学
·
分离科学
·
电化学工程
·
功能材料
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2012
·Vol. 213
·期 20
·2192-2200
·
IF 2.361
Xiao-Hui Dai,Chun-Yan Hong,Cai-Yuan Pan
A novel double-hydrophilic block copolymer P(MEO 2 MA- co -OEGMA)- b -PAMA has been successfully synthesized by two-step RAFT polymerization. Then, the amino groups of PAMA blocks in the copolymers react with 1-pyrenecarboxaldehyde via a “Schiff-base” reaction, and the resulting copolymers are self-assembled to form spherical micelles in aqueous solution. Because the “Schiff-base” linkage is pH sensitive, the release rate of pyrene depends upon the pH of solution. Complete release is achieved at pH 1, and the control release is much faster at pH 5.5 than that at pH 7.4. With progress of pyrene release, the micelles are disassembled gradually and disappeared completely at last. This double-hydrophilic copolymer is a promising candidate of drug carrier for the aldehyde- containing hydrophobic drugs.
研究领域:
高分子化学
·
药剂学
·
纳米医学
·
生物材料
·
药物递送系统
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 12
·9327-9333
·
IF 2.986
Nan Zhou,Shengxiong Huang,Tao Hong,Wei Luo,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, LiTi 2 (PO 4 ) 3 @carbon composite as anode for aqueous lithium ion battery has been successfully synthesized by in-situ carbon coating method using oxalic acid and glucose as double carbon sources. XRD results confirm the rhombohedral NASICON-type LiTi 2 (PO 4 ) 3 structure of the as-prepared composite. The LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources (LTP-OG-10) disperses well, and the coated carbon layer has the appropriate thickness of 3–7 nm, which result in proper balance of the good electrical conductivity and the fast kinetics of diffusion of lithium ions . LTP-OG-10 exhibits better electrochemical performance compared with those using oxalic acid (LTP-O) or glucose (LTP-G) single carbon source. LTP-OG-10 anode delivers the discharge capacity of 112.5 mA h g −1 , 96.8 mA h g −1 , and 54.2 mA h g −1 at 0.2 C, 5 C and 20 C, respectively, much larger than that of LTP-O and LTP-G. Moreover, LTP-OG-10 demonstrated excellent cycling performance, with the capacity retention of 71.1% after 400 cycles at 0.2 C, 22.9% higher than that of LTP-G. The good electrochemical properties of LTP-OG-10 is mainly ascribed to the increase of defects, high-quality and appropriate thickness of carbon layer. Our study reveals that preparing LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources is an efficient approach to enhance its electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）