FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Yancheng Yan,Shicheng Mao,Baogang Wang
Oil-soluble carbon dots modified by ionic liquid groups (O-CDs-IL) were successfully synthesized and used as the lubricant additives of polyalphaolefin. The O-CDs-IL as additives exhibited not only the excellent dispersion stability but also the prominent tribological performance. Adding 3.0 wt% of O-CDs-IL made the coefficient of friction (COF) and wear volume (WV) of base oil reduce by 37.3% and 61.1%, respectively. When the test duration prolonged from 10 to 110 min, the above COF and WV reductions further enlarged to 47.8% and 69.2%. The worn surface analysis results demonstrated that a complex boundary lubrication film has formed on the worn surface lubricated by the lubricant containing O-CDs-IL. In fact, the film was a tribofilm composed of carbon cores of O-CDs-IL and chemical reaction products such as iron oxides, N-containing compounds, metal nitrides and FePO4, well accounting for the eminent friction-reducing and anti-wear functions of O-CDs-IL.
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Ru Zhao,Xinyu Yang,Muzhi Li,Xiaojin Peng,Mengxia Wei,Xiucheng Zhang,Lei Yang,Jialei Li
In order to produce an alternative energy of biodiesel using field pennycress ( Thlaspi arvense L.) seed oil, a novel Fe 3 O 4 /graphene oxide-phenylalanine bisulfate ionic liquid core-shell magnetic catalyst was developed. Ferroferric oxide nanoparticles and graphene oxide (GO) were employed to prepare a magnetic carrier of Fe 3 O 4 @GO nanocomposite which applied to immobilize phenylalanine bisulfate ionic liquid (PBIL). The immobilized PBIL was characterized by the means of characterization. The heterogeneous Fe 3 O 4 @ [email protected] catalyst was demonstrated to have a high catalytic efficiency that reached 92.38 % of biodiesel yield under the optimal conditions (methanol/oil molar ratio of 10:1, reaction temperature of 60 °C, reaction time of 4 h, catalyst dosage of 25 wt%, stirring speed of 1500 r/min). After transesterification processes, the catalyst could be easily removed from the reaction mixture with an external magnet and showed little deactivation after multiple recycles. The main properties of biodiesel product were reconcilable with the range of test standards of ASTM D6751 and EN 14214. In summary, the prepared Fe 3 O 4 @ [email protected] catalyst behaved a superiorly catalytic performance, which made the produced biodiesel possess the possibility of application to biofuel as an ideal substitution.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenzhe Su,Zanyu Chen,Xingkai Wang,Peng Cui,Minjie Yao,Hui Sun,Hong Zhang,Yida Deng,Xiaopeng Han,Wenbin Hu
Due to high safety and low-cost, aqueous Zn-ion batteries (ZIBs) are expected to be a promising next-generation energy storage technology. Exploiting high capacity and stable cathode materials are extremely important for the development of aqueous ZIBs. However, commercial V 2 O 5 despite its high theoretical specific capacity, suffers from structural instability during charging and discharging, and strong electrostatic forces seriously limit the diffusion of Zn 2+ . Herein, a novel dynamic transport mechanism of Zn 2+ is designed by intercalating organic cations (C 8 H 15 N 2 + ) from ionic liquids into the interlayers of V 2 O 5 . The electrostatic interaction between the C 8 H 15 N 2 + and the V-O layers enhance the structure stability of the layers and increase the interlayer spacing. Meanwhile, the C 8 H 15 N 2 + between the V-O layers reduce the diffusion energy barrier of Zn 2+ and enable the rapid dynamically transport of Zn 2+ . The diffusion coefficient is enhanced by an order of magnitude. The optimized V 2 O 5 cathode exhibits a high capacity of 268 mA h/g at 100 mA/g and excellent cycling stability (over 500 cycles at 200 mA/g with nearly 100 % coulombic efficiency). The home-made pouch cells deliver a high energy density of 310 W h kg −1 . This interesting idea opens up a new research direction for high-energy secondary batteries.
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DOI
高影响因子
Green Energy & Environment
·
2020
·
IF 6.395
Hong Zhang,Ying Luo,Dong Chen,Hui Liu,Penglei Cui,Jun Yang
To maximize the size and structural advantages of nanomaterials in electrooxidation of ethanol, we herein report the synthesis of core–shell gold (Au)@Palladium (Pd) nanoparticles smaller than 3 nm in an ionic liquid, which combines the advantages of ionic liquids in preparing fine metal nanoparticles with the benefits of core–shell nanostructures. This synthetic strategy relies on the use of an ionic liquid (1-(2′-aminoethyl)-3-methyl-imidazolum tetrafluoroborate) as a stabilizer to produce Au particles with an average size of ca. 2.41 nm, which are then served as seeds for the formation of tiny core–shell Au@Pd nanoparticles with different Au/Pd molar ratios. The strong electronic coupling between Au core and Pd shell endows the Pd shell with an electronic structure favorable for the ethanol oxidation reaction. In specific, the ionic liquid-derived core–shell Au@Pd nanoparticles at an Au/Pd molar ratio of 1/1 exhibit the highest mass- and area-based activities, approximately 11 times than those of commercial Pd/C catalyst for ethanol electrooxidation.
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DOI
高影响因子
JOURNAL OF FOOD AND DRUG ANALYSIS
·
2017
·
IF 3.048
Juan Miao,Xin Wang,Yunchang Fan,Jing Li,Lina Zhang,Guitao Hu,Can He,Can Jin
A mercury(II) ion-selective electrode with an ionic liquid (IL), 1-methyl-2-butylthioimidazolium bis(trifluoromethanesulphonyl)imide ([C 1 C 4 Sim]NTf 2 ) as active material was constructed. Parameters affecting the performance of the electrodes such as the dosages of the IL and carbon nanotubes and the aqueous pH values were investigated. Experimental results indicated that the optimal composition of the electrode filling material was 47.6% [C 1 C 4 Sim]NTf 2 , 47.6% tetrabutylphosphonium bis(trifluoromethanesulphonyl)imide (TBPNTf 2 ) and 4.8% carboxylic multi-walled carbon nanotubes (MWCNTs-COOH). Under the selected conditions, the proposed electrodes showed a good linear response in the concentration range of 10 −10 –10 −5 mol L −1 and had a detection limit of 4.1 × 10 −11 mol L −1 . No great interference from common metal ions was found. The proposed electrodes were applied to determine Hg 2+ in seafood samples; the results were comparable to those of the direct mercury analyzer.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 1
·016504
·
IF 4.316
Haomin Jiang,Yujuan Cheng,Zhaohui Wang,Zhiqun Bai,Yang Tang,Yanzhi Sun,Pingyu Wan,Yongmei Chen
The cleavage of the linkage bonds among the C9 units in lignin molecules via selective oxidation method to obtain small-weight aromatic compounds is an important way to lignin valorisation. In this study, the cleavage pathways of bonds in a lignin model compound, GGE (guaiacylglycerol-β-guaiacyl ether), by the reactive oxygen species (ROS) in situ generated through electrochemical oxygen reduction reaction (ORR) in an aprotic ionic liquid ([BMIM]BF4) was investigated. The results indicated that when the main ROS was ·OOH, coniferyl alcohol, guaiacol and vanillin were detected as the degradation products which is supposed to be caused by β-O-4 bonds cleavage; Otherwise, when HO2− was the main ROS, coniferyl alcohol could not be detected and the degradation reaction is believed to be trigerred by Cα-Cβ bonds cleavage.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Ye Lian,Jinqiu Zhang,Xiaochuan Ma,Peixia Yang,Maozhong An
Three-dimensional ordered macroporous (3DOM) CuIn x Ga 1−x Se 2 (CIGS) film is synthesized by one-step galvanostatic electrodeposition based on polystyrene templates from a special mixture of ionic liquid 1-butyl-3-methylimidazolium tetra-fluoroborate and ethanol. X-ray diffraction pattern , Raman spectroscopy and transmission electron microscopy present the CIGS film has ideal chalcopyrite crystallization. 3DOM CIGS film with high Ga content has photochemical activity and good photo-stability, its band gap is 1.34 eV. This is a simple, feasible and additive free method without selenization process to synthesize 3DOM CIGS film, the film is qualified and available for absorber-layer fabrication or other fields.
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DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 32
·2201259
·
IF 6.389
Wenjing Hou,Yuting Ma,Jin Kang,Yaoming Xiao,Gaoyi Han
Lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) doped 2,2′,7,7′ -tetrakis( N , N -di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) is employed as one of the most common hole transport layer. However, the Li + in Li-TFSI is easy to migrate from Spiro-OMeTAD to perovskite and SnO 2 , left the voids/pinholes in perovskite film to accelerate the invasion of oxygen and moisture, and lead to the device degradation. Here, the 1-butyl-3-methyl imidazolium phosphate dibutyl ester ([Bmim] + [DBP] − ) ionic liquid (IL) is prepared and used to modify the perovskite/Spiro-OMeTAD interface in the perovskite solar cells. The coordination interaction between P O in [Bmim] + [DBP] − IL and Pb 2+ can improve the morphology of perovskite film by passivating the uncoordinated Pb 2+ defects. The interaction between P O and Li + can suppress the undesired Li + migration. The regulated energy level assignment and ion nature of [Bmim] + [DBP] − IL can accelerate the carrier extraction at perovskite/Spiro-OMeTAD interface. The device based on the [Bmim] + [DBP] − IL interface modification yields a highly efficient photoelectric conversion efficiency of 21.16% and improved stability, outperforming that of control (19.31%) devices under the illumination of 100 mW cm −2 (AM 1.5 G).
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DOI
高影响因子
Geoenergy Science and Engineering
·
2023
·
IF 0
Fan Ye,Xinyuan Zhang,Xuebin Jiang,Hanjun Liu,Yuqi Tang,Qian Qu,Liwei Shen,Zejun Zhang,Yuanzhu Mi,Xuemin Yan
In this work, a three-branched betaine type ionic liquid (TESA) with elevated interfacial activity was synthesized to separate water from crude oil emulsions at low temperature. The chemical structure, demulsification performance, and demulsification mechanism of TESA was investigated. The bottle tests exhibited that the dehydration efficiency was 100% with 150 mg/L of TESA for 40 min at 50 °C. TESA was effective in acidic, alkaline, and high salinity conditions. The dehydration efficiency of TESA was more than 95.63% with a wide pH range of 3–11. Furthermore, the dehydration efficiency was 100% with 50000 mg/L of salinity for 20 min at 50 °C. Encouragingly, the dehydration efficiency of TESA was better than that of commercial demulsifiers and reported work. The excellent dehydration efficiency of TESA was ascribed to the elevated interfacial activity, amphipathy, and strong interaction with asphaltenes . As a result, TESA improved the substitution of asphaltenes and considerably reduced interfacial tension, resulting in an unstable interfacial film and leading to demulsification. It indicated that TESA was an effective demulsifier, which promised application in the oil industry.
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DOI
FUEL
·
2021
·
IF 6.609
Shucui Han,Jinbei Yang,Hui Huang
In this work, two double-site acidic ionic liquids were synthesized by a two-step method via the reaction of 1,2-bis(diphenylphosphino) ethane (DPhPE) with 1,3-propanesulfonate (PS) to form a DPhPE-PS zwitterion followed by acidification with different acids. The obtained ionic liquids were characterized and further used as catalyst for the esterification of various free fatty acids with methanol to produce biodiesel. The suitable self-solidifying double-site acidic ionic liquid [DPhPE-PS][HSO 4 ] 2 is homogeneous catalytic due to its solubility during the esterification, which is precipitated after reaction. The evaporation of the residual methanol and generated water combines the advantages of homogeneous and heterogeneous catalysts, including their excellent catalytic activity and convenient recovery. [DPhPE-PS][HSO 4 ] 2 exhibits 98.65% of oleic acid conversion under operating appropriate conditions optimized by response surface methodology (catalyst dosage of 6.0 wt%, molar ratio of methanol to oleic acid of 10.0:1, reaction temperature of 60.0 °C, and reaction time of 4.0 h) and keeps outstanding catalytic performance after 9 cycles. Moreover, [DPhPE-PS][HSO 4 ] 2 also displays excellent catalytic activity and good versatility in the esterification of various free fatty acids to biodiesel. Hence, the self-solidifying double-site acidic ionic liquid [DPhPE-PS][HSO 4 ] 2 can be used as an environmentally friendly and efficient catalyst for synthesis of biodiesel via esterification.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Haixia Lyu,Kai Hu,Qinghua Chu,Zhiping Su,Zenghong Xie
In this paper, an ionic liquid mediated molecularly imprinted polymer (IL-MIP) was prepared, in which synthesis system 1-butyl-3-methylimidazolium tetrafluoroborate (IL) was introduced to improve its selectivity and adsorption for the target. The structures of the prepared materials were characterized by SEM, BET, 13 CNMR and FTIR, and the adsorption performance of the resultant IL-MIP for BPA and its analogues (phenol, 4-NP, 4-CAP and 1-naphthol) in strong polar media were investigated in detail. The experimental data showed that the adsorption capacities of IL-MIP and molecularly imprinted polymer (MIP) for Bisphenol A (BPA) were 116.16 mg/g and 87.30 mg/g, with imprinting factor of 3.77 and 2.72, respectively. In addition, several other competitive analogues with different polarities (phenol, 4-NP, 4-CAP and 1-naphthol) were chosen to evaluate the selectivity of IL-MIP and the experimental results demonstrated that the synthesized IL-MIP displayed selectivity toward BPA and against analogue molecules. This work provided a simple and effective method to selectively extract BPA from aqueous medium or strong polar organic solvent.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20500-20512
·
IF 9.931
Xiongwei Li,Yuezhan Feng,Chao Chen,Yunsheng Ye,Hongxia Zeng,Hao Qu,Jingwei Liu,Xingping Zhou,Shijun Long,Xiaolin Xie
The low heat dissipation efficiency and serious security issues related to polymer-based thermal management materials (TMMs) have seriously limited their practical applications. However, simultaneously improving their thermal conductivity (TC) and flame retardancy is still a challenge due to performance limitations and complicated processing. Here, non-covalent ionic liquid flame retardant-functionalized boron nitride nanosheets (ILFR-fBNNSs) were used as a multifunctional nano-additive for fabricating epoxy (EP)-based nanocomposites with both superior TC and flame retardancy. Owing to its structural uniqueness and multifunctionality, the ILFR-fBNNS triggers resin crosslinking at a given temperature, while conferring significant improvements in dispersion and interfacial adhesion, thereby forming a thermally conductive network with reduced interfacial phonon scattering and a high-efficiency nano-barrier network acting synergistically with ILFR-induced char residues during thermal degradation. Therefore, the ILFR-fBNNS not only functions as a curing agent for fabricating the nanocomposites, but also acts as a thermal conductor and flame retardant for the nanocomposites. The optimal comprehensive performances of EP/ILFR-fBNNS nanocomposite are achieved with a 12.1 vol% ILFR-fBNNS content with TC enhancement of 478%, and reductions of up to 68.9% and 42.3% by microscale combustion calorimetry (42.4% and 37.7% by cone calorimeter) in peak heat release rate (PHRR) and total heat release (THR) respectively compared to neat EP.
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DOI
高影响因子
危险品化学品经营许可证（带存储）