Nano Energy
·
2020
·
IF 16.602
Lingli Xing,Kwadwo Asare Owusu,Xinyu Liu,Jiashen Meng,Kun Wang,Qinyou An,Liqiang Mai
As promising electrode materials for aluminum-ion batteries (AIBs), transition metal sulfides have attracted significant attention. However, the relative low energy density and poor rate property restrict their further applications. Herein, channels-rich VS 4 nanowire clusters were synthesized via an amine ions-assisted method. When assessed as a cathode for rechargeable AIB, the VS 4 nanowire clusters exhibit superior electrochemical performances , specifically, outstanding rate property (103.32 mAh g -1 at 800 mA g -1 ), good cycling stability and a high reversible capacity of 252.51 mAh g -1 (at 100 mA g -1 ). Moreover, ex-situ X-ray diffraction (XRD) and in-situ Raman techniques reveal that the as-prepared VS 4 nanowire clusters have stable channels-rich structures, which is favorable for the mass transfer in electrochemical reaction . A mechanism of intercalation is proposed for the electrochemical process . This work takes a step toward the development of high-performance electrode materials for AIBs and provides new insights into the chemistry of AIBs for electrochemical energy storage .
研究领域:
电化学
·
能源材料科学
·
纳米材料学
·
储能技术
·
无机化学
·
材料物理
·
应用化学
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2017
·
IF 4.292
Lijun Zhao,Haiyang Cheng,Tong Liu,Yan Li,Zhong Ying,Wenjing Yang,Weiwei Lin,Xiangchun Meng,Chengxue Wang,Fengyu Zhao
An efficient green process was developed for production of p -aminophenol (PAP) from hydrogenation of nitrobenzene (NB) over a traditional Pt/Al 2 O 3 catalyst in a reaction medium of supercritical CO 2 (scCO 2 ) and H 2 O without any additional acid catalyst involved. The combination of scCO 2 and H 2 O was confirmed to be effective for the production of PAP. The acidity, aroused by the in situ formed carbonic acid, increased with CO 2 pressure, which acted as acid catalysis during the reaction, and it can easily self-neutralize by depressurization of CO 2 , resulting in a green and a intensive process for it removed the final neutralization and salts disposal of the traditional liquid acids. Under the optimal reaction conditions, a high yield to PAP (68.9%) was achieved at the high conversion of NB (98.5%). Moreover, the results of in situ diffuse reflectance FTIR spectra revealed that CO was generated by the reverse water-gas shift reaction (CO 2 + H 2 → CO + H 2 O), it can adsorbed on the surface of Pt/Al 2 O 3 to suppress the undesired deep hydrogenation of N -phenylhydroxylamine (PHA) to aniline (AN), which also contributed to the obtained high selectivity of PAP. Therefore, the present green and efficient catalysis process will arouse the interest of researchers in the fields of the green and sustainable organic synthesis.
研究领域:
绿色化学
·
有机合成
·
催化化学
·
环境友好工艺
·
工业化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Kehang Li,Zhe Zhao
Stereolithography (SLA) has been regarded as the most promising rapid prototype (RP) production method for ceramic parts recently because of its better precision in size and site control. The rheological behavior and curing behavior of suspensions are controlling factors for ceramic stereolithography. In this work, oleic acid (OA), stearic acid (SA) and Poly(Acrylate Ammonium) (PAA-NH 4 ) were studied as the surfactant for HDDA-based suspension formulation. Modified alumina particles exhibit different wettability with HDDA monomer and thus the different rheology behavior and stability between the formulated suspensions. OA shows the best performance among all three dispersants . 40 vol% alumina suspensions with a viscosity ˂3 Pa s at 30 s −1 shear rate were successfully formulated with OA and SA. A sintering density of 95% can be reached for the OA- and SA-modified alumina UV-curable resins.
研究领域:
材料科学
·
陶瓷
·
三维打印
·
高分子化学
·
表面化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Zhe Qiao,Hongfang Zhang,Yuanzhen Zhou,Jianbin Zheng
Label-free biosensing based on the nanoporous anodic alumina (NAA) membrane emerged as a versatile biosensing platform in the recent decade. In the present work, we developed a new immunosensing strategy based on the nanochannels of NAA and the ion pair interaction mediated by electrochemistry of C60. The NAA served as the matrix for the immobilization of the capture antibodies. The incubation of target antigens resulted in the formation of the immunocomplexes and thus an increase of the steric hindrance of the nanochannels. Therefore, the concentration of the redox probe transported through the nanochannels decreases, which can be detected at the working electrode modified with C60. Herein, we initially found that the cathodic peak ascribed to the reduction of C60 to C60– was obviously enhanced by the presence of the redox probe K3[Fe(CN)6] and which was contributed to the formation of a ternary ion association complex among C60, tetraoctylammonium bromide, and K3[Fe(CN)6]. Therefore, the transportation of K3[Fe(CN)6] though the NAA-based bionanochannels can be detected by a C60 modified electrode with an amplified signal. Choosing human epididymis protein 4 (HE4) as the model target, a linear range of 1.0 ng mL–1 to 100 ng mL–1 can be established between the peak current obtained from the differential pulse voltammetric response of the platform and the concentration of HE4. The detection limit was 0.2 ng mL–1. This study not only provides a new avenue to develop the other nanochannel-based biosensing platform for a variety of other disease biomarkers but also contributes to the electrochemistry of fullerene.
研究领域:
生物医学工程
·
电化学传感
·
免疫学
·
纳米医学
·
分子诊断
·
转化医学
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2022
·
IF 6.057
Xuewei He,Ang Ye,Xuewei Fu,Wei Yang,Yu Wang
Adhesive polymer electrolytes are of great interest for next-generation high-energy-density solid-state batteries but their practical applications have been blocked by extremely low ionic conductivity that is fundamentally caused by a coupling transport mechanism. Here, to boost the ionic conductivity, we propose a decoupled low-energy-barrier ion-hopping mechanism that is realized by surface absorption from nanoparticles. To test this model, Al2O3 nanoparticles are composited with a fully amorphous and adhesive ultrahigh-molecular-weight poly(ethylene oxide) (UHMWPEO)–Li+ complex. It is found that the ion conductivity can be improved to 9.94 ± 1.57 × 10–5 S cm–1 at 20 °C, ca. about 20 times of the pure complex electrolyte. Meanwhile, the ion-hopping energy barrier is reduced by 67%, yielding a low activation energy of 0.25 eV. This phenomenon is further explained by the nanoabsorption effects on shrinking the free volume (the hopping distance) and stabilizing the hopping sites. Further, the strong nanoabsorption effects also notably improve the mechanical properties as well as the electrochemical stability of the resultant nanocomposite electrolyte. When the adhesive composite electrolyte is coated onto a commercial separator, it effectively improves the stability of Li metal and the cycling performance lasts for 2000 h before its failure, demonstrating the potential applications in Li–metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子物理
·
固态电池
·
纳米复合材料
·
离子导电机制
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2022
·
IF 2.216
Ling Liu,Mingyuan Wu,Qingyun Wu,Jiuyi Liu,Jianjun Yang,Jianan Zhang
An efficient method for the preparation of polymer grafted gibbsite nanoplatelets (NPs) was proposed by direct preparation of initiator-tethered gibbsite (gibbsite-Br) NPs followed by surface-initiated atom transfer radical polymerization (SI-ATRP) to obtain gibbsite particle brushes. By adding portion of water-soluble solvent (e.g., alcohol), individual ATRP initiator-tethered gibbsite NPs were fabricated using 2-bromo-2-methylpropionic acid as a tetherable initiator avoiding the aggregation of gibbsite NPs which are ready for polymer grafting process. To verify the efficiency of the tethered initiator, various polymers grafted gibbsite NPs were fabricated by SI-ATRP. The results indicated that initiator anchored gibbsite NPs and various gibbsite-g-polymers (e.g., gibbsite-g-poly2-(dimethylamino) ethyl methacrylate, gibbsite-g-polyacrylonitrile, gibbsite-g-polymethyl methacrylate) were synthesized successfully. The thermal stabilities of gibbsite-g-polymer hybrid materials have been enhanced significantly. Compared with PMMA matrix, the fire-retardant behavior of gibbsite-g-polymethyl methacrylate was strengthened due to the incorporation of gibbsite NPs. This work proposed a versatile and convenient method for producing initiator-immobilized solid NPs and polymer grafts, which thereby enables promised properties of polymer hybrid materials depending on the orientation and interactions of particle brushes.
研究领域:
高分子科学
·
纳米技术
·
材料科学
·
表面化学
·
阻燃性能
✓ 已验证
DOI
高影响因子
Water Supply
·
2022
·Vol. 22
·期 8
·6603-6614
·
IF 1.768
Zhang Fengrong,Zhang Binghan,Han Dandan,Fang Shaokang,Wu Lishun,Hou Wanguo
Using Al(OH) 3 and Mg(OH) 2 as raw materials, MgAl layered double hydroxides (LDHs) modified from birch leaves were prepared by the ball-milling–hydrothermal method, denoted as LDHs/BL, and used for the treatment of wastewater containing Cu(II). The morphology, crystal shape, and specific surface area of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and BET-specific surface area analyzer. The results showed that the prepared LDHs/BL composites had good crystal shape, large specific surface area, and suitable pore structure. Langmuir and Freundlich adsorption isotherm models were used to analyze the adsorption. The results showed that the adsorption conforms to the Freundlich adsorption isotherm model. Under the same adsorption conditions, the adsorption capacity of the LDHs/BL complex was higher than that of LDH, the removal efficiency of the former was 92%, and that of the latter was 68%. The adsorption mechanism includes metal precipitation and isomorphic replacement. More importantly, this study provides a green method to prepare LDHs. LDHs/BL composites are expected to be used as a new kind of environmental adsorbent for wastewater treatment. This work provides a new idea for the utilization of agricultural and forestry wastes. Nanocomposites of LDHs/BL were fabricated. The LDHs/BL nanocomposites exhibit enhanced sorption capacities for Cu(II). The nanocomposites are potential sorbents for wastewater treatment. The synthesis of LDHs/BL nanocomposites provides a win–win strategy.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
废弃物管理
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yuhang He,Yangcheng Lu
An initiating system composed by ethylaluminum sesquichloride (Et 3 Al 2 Cl 3 )//2,6-dimethylpyridine (DMP) is established for fast living cationic polymerization of isobutylene. The polymerization can be accelerated at utmost to finish in only 4 s with extremely narrow molecular weight distribution in microflow system. Investigations on influence factors reveal that mixing intensity that dependent on Re affects the molecular weight distribution significantly. DMP has two-stage effect, corresponding to its interactions with protonic impurity and Lewis acid respectively. Polymerization rate can be facilely adjusted by changing the volume ratio of mixed solvent of n-hexane and CH 2 Cl 2 from 8:2 to 7:3 with the assurance of livingness. This polymerization system can even operate at elevated temperature as high as −55 °C without the loss of livingness, which is of great beneficial to the commercialization of polyisobutylene-based functional polymer materials.
研究领域:
高分子化学
·
化学工程
·
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 9
·4239-4246
·
IF 2.394
Zhang Yi,Feng Wei,Zhen Yichao,Zhao Peiyao,Wang Xiaohui,Li Longtu
Li 7 La 3 Zr 2 O 12 (LLZO) with cubic phase structure is a kind of lithium-ion-conducting nanoparticles. According to the previous studies, incorporation of c-LLZO can improve electrochemical properties of PEO-based composite polymer electrolytes (CPEs). Therefore, in our study, we synthesized a kind of room-temperature-stable cubic phase LLZAO (Li 6.25 La 3 Zr 2 Al 0.25 O 12 ) nanofibers, and we aimed to confirm the optimal content of LLZAO nanofibers in PEO-based CPEs. With the incorporating 10 wt% LLZAO nanofibers, ionic conductivity of CPEs are 9.87×10 −5 S cm −1 at 30 °C and 8.66×10 −4 S cm −1 at 60 °C. The Li/CPE incorporating 10 wt% LLZAO nanofibers/Li symmetric cell exhibits little voltage fluctuation in 1000 cycles under a current density of 0.5 mA cm −2 , demonstrating better cycling stability with long cycle life. The LiFePO 4 /CPE incorporating 10 wt% LLZAO nanofibers/Li cell has a high initial discharge-specific capacity of 155.6 mAh g −1 under 0.1 C rate at 60 °C and remains 94.5% of capacity after 100 cycles. This cell also has great cycling performance under 0.2 C and 0.5 C rate, indicating good rate performance. Our work indicates that incorporation of LLZAO nanofibers enhances electrochemical properties and cycling stability of PEO-based all-solid-state lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
高分子材料
·
纳米材料
·
电化学能量转换
✓ 已验证
DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2022
·
IF 9.93
Xing Ming,Qing Liu,Miaomiao Wang,Yongqing Cai,Binmeng Chen,Zongjin Li
Chloride-induced corrosion in reinforced concrete is a primary durability issue that causes large economic loss every year. To improve the intrinsic chloride binding capacity and realize a favorable corrosion protection of cement-based materials are thus crucial to prolong the service life of concrete structures. Here, alumina nano particles (ANPs) were incorporated to improve the chloride binding capacity of cement pastes in chloride solutions and the anti-corrosion performance of mortars under accelerated corrosion process. The ANPs facilitated the formation of alumino-ferrite-mono (AFm)-type phases, thereby improved the content of chemically bound chlorides. Solution calcium (Ca) ions benefited the chloride captured by calcium-(alumino-)silicate-hydrates (C-(A-)S-H) in the assistance of ANPs, especially at high initial chloride concentrations , and further evoked a pH-related chloride binding response. Moreover, the enhanced corrosion resistance was finally realized by incorporating appropriate amount of ANPs because of the filling and chemical effects induced low permeability of mortars. In general, the ANPs possess dual functions in the aspects of chloride binding and corrosion inhibition . These findings are expected to advance the design of high-durable cement-based materials serviced in the marine environment.
研究领域:
建筑材料
·
土木工程材料
·
腐蚀科学
·
纳米材料应用
·
混凝土耐久性
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2024
·
IF 2.1
Song Wang,Lingchen Meng,Ailing Zhang
Hexachlorocyclotriphosphazene (HCCP) was reacted with piperazine to obtain poly(cyclotriphosphazene-co-piperazine) particle (PCPS), which was used as the flame retardant for epoxy resin (EP). The structure of PCPS was determined by various methods. When PCPS was used alone and the addition amount of PCPS in the prepared flame-retardant EP (FR-EP) reached 4%, the obtained FR-EP cannot even pass the V-1 level in the Vertical burning (UL-94) test. However, PCPS showed a synergistic flame retardancy with aluminum diethylphosphinate (ADP). When the mixture of ADP and PCPS in EP was 4% and the weight ratio of ADP and PCPS was 3:1, the prepared FR-EP, EP-ADP/PCPS3:1, reached the V-0 level in the UL-94 test. The limiting oxygen index (LOI) value of EP-ADP/PCPS3:1 was 29.7%. Compared with pure EP, the peak heat release rate of EP-ADP/PCPS3:1 obtained by the micro-combustion calorimetry (MCC) test was reduced by 20.6%. Thermogravimetric analysis (TGA) result showed that, with the addition of ADP and PCPS, the char residual of EP-ADP/PCPS3:1 increased about 5.1% compared with EP. The combination of ADP and PCPS showed significant advantage in promoting the flame retardancy of EP. Compared with pure EP, the mechanical properties of EP-ADP/PCPS3:1 was hardly decreased with the addition of ADP and PCPS.
研究领域:
高分子科学
·
材料工程
·
消防安全工程
·
化学合成
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Haochen Zhu,Fatima-Ezzahra Bennani,Dounia Bennani,Islam A. Abdelhafeez,Yunjie Zhu
This study aims to valorize Chouara Tannery’s water sources (the Boukhrareb creek and local underground water) by eliminating some typical pollutants using coagulation–flocculation process followed by activated carbon filtration. For the coagulation–flocculation process, we used ferric chloride (FeCl 3 ) and aluminum sulfate (Al 2 (SO 4 ) 3 ) separately with different dosages to choose the most efficient coagulant. According to the experiment results, analyzed pollutants, heavy metals, and turbidity were well decreased by (FeCl 3 ) with an optimal concentration of 15 mg/L for Boukhrareb creek and 20 mg/L for underground water. In particular, turbidity was reduced with coagulation– flocculation process; it has reached 0.27 NTU for Boukhrareb creek, as well as 1.8 NTU for local underground water after activating carbon filtration. In addition, some toxic heavy metals such as iron, phosphorus, and aluminum were removed up to 99% and mercury for 100% for both water samples. For this reason, this research strongly suggests using ferric chloride as a coagulant–flocculant followed by activated carbon filtration before using them in Chouara Tannery leather production’s process.
研究领域:
环境工程
·
水处理技术
·
化学工程
·
污染控制
·
工业废水管理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）