CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiu-Yan Cheng,Shu-Qiang Peng,Li-Xin Wu,Qing-fu Sun
3D-printed stretchable sensors have promising applications in wearable devices, human–computer interaction, soft robotics, and many other fields. However, low conductivity and poor stretchability still hinder their extensive applications. Herein, we report a strategy of double networks and annealed PEDOT:PSS for the first time. The new material combines mechanical stretch performance and conductivity together, where 3D-printed complex stretchable poly(2-hydroxyethyl acrylate-isobornyl acrylate) (PHI) structure serves as the tough network and annealed highly conductive PEDOT:PSS serves as the functional network. It is adopted to build 3D-printed porous stereo structures with both stretchability and conductivity. It exhibits interconnected uniform networks, improved storage modulus (1.3 * 10 6 Pa), higher conductivity (The conductivity of PHI/PEDOT: PSS annealed is up to 3.12 * 10 −1 S m −1 , which is 441 times compared to PHI/PEDOT: PSS), excellent stability and durability at a large strain of 60%. Hence, it is expected that this new strategy will open up wide possibilities for designing stretchable sensors and smart devices.
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Ping Li,Fei Liu,Zhifan Zhu,Fei Yan,Xiaofeng Tong,Tian Gan,Ligang Wang,Dong Fu
In this work, a strategy of A-site deficiency and F-doping was proposed to prepare Pr 0.4 Sr 0.55 Ni 0.2 Fe 0.7 Mo 0.1 F 0.1 O 2.9 (PSNFMF) cathode. Compared with the reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 (R-PSNFM), the reduced PSNFMF facilitate the exsolution reaction and generate more oxygen vacancies . Moreover, at 800 °C, the chemical oxygen surface exchange coefficient ( k chem ) of R-PSNFMF is 4.31 × 10 −4 cm s −1 , 21.8% higher than the value of 3.54 × 10 −4 cm s −1 for R-PSNFM, and the oxygen chemical bulk diffusion coefficient ( D chem ) of R-PSNFMF is 34.21 × 10 −5 cm 2 s −1 , 24.3% higher than the value of 27.53 × 10 −5 cm 2 s −1 for R-PSNFM, suggesting faster oxygen transport kinetics are obtained for R-PSNFMF. Meanwhile, the synergistic effect of A-site deficiency and anion doping can also promote the electrolysis of H 2 O and CO 2 . For H 2 O electrolysis, the current density of R-PSNFMF based cell at 0.4 V (vs. OCV) is −0.75 A cm −2 , 31.6% higher than the value of −0.56 A cm −2 for R-PSNFM based cell. And for CO 2 electrolysis in harsh condition at 800 °C, the current density of R-PSNFMF based cell at 0.4 V (vs. OCV) is −0.43 A cm −2 , 38.7% higher than the value of −0.31 A cm −2 for R-PSNFM based cell.
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高影响因子
DALTON TRANSACTIONS
·
2023
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IF 4
Yi Shui,Zhengli Liang,Zhenhua Li,Jiahao Wan,Lehui Liu,Xingxing Jiang,Zheshuai Lin,Hongming Liu
Exploring feasible tactics to induce the formation of non-centrosymmetric (NCS) structures, especially from centrosymmetric (CS) structures, is essential for the development of nonlinear optical crystals with more potential. An NCS alkali metal-containing molybdenum iodate hydrate, namely, NaMoO3(IO3)(H2O), was designed based on the CS matrix NaMoO3(IO3) via introducing a water molecule into the structure. The introduction of one crystalline water molecule results in the rearrangement of Λ-shaped cis-[MoO4(IO3)2] units, and the proper array of the cis-[MoO4(IO3)2] units in NaMoO3(IO3)(H2O) results in its strong SHG response of 4.6 × KH2PO4. In addition, NaMoO3(IO3)(H2O) exhibits a wider optical bandgap of 3.44 eV and a larger birefringence of 0.231 than its matrix. Furthermore, the framework of NaMoO3(IO3)(H2O) is highly similar to that of α-KMoO3(IO3), with water molecules assisting Na+ cations in occupying the position of K+. However, due to the extra hydrogen bond of water molecules, the [MoO3(IO3)]∞ layers in NaMoO3(IO3)(H2O) retain a parallel-stacking arrangement, different from the antiparallel arrangement of layers in α-KMoO3(IO3) with a centric structure. This study confirms the feasibility of applying a water molecule to adjust the orientation of basic building block units to assemble an NCS structure based on CS crystals.
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PubMed
高影响因子
FUEL
·
2023
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IF 7.4
Jiale Gu,Huan Li,Wencai Peng,Di Zhu,Jiajia Chen,Shengjie Luo,Siming Liu,Wenxiang Zhao,Youqing Wu,Sheng Huang,Shiyong Wu
The hydrogenation properties of dibenzyl ether (an oxygenated model compound of lignite) via the water–gas shift reaction (WGSR) were studied in a subcritical CO-H 2 O system. The result showed during the hydrogenation process, the C-O bond was broken, and the fragments of dibenzyl ether were stabilized by the hydrogen generated by WGSR, generating benzene, toluene, benzyl alcohol and benzaldehyde. The presence of excess water inhibited the hydrogen transfer, largely reducing the conversion of dibenzyl ether. However, the inhibition effect was substantially reduced when the reaction environment reached the critical temperature and subcritical pressure of water. The hydrogen and deuterium generated by H 2 O and D 2 O via WGSR were utilized to label and analyze the hydrogenation position of the product, respectively. The results showed that the hydrogen generated by WGSR was added to the methylene after the break of dibenzyl ether, and this hydrogen appeared on the benzene ring structure via hydrogen transfer. The bond dissociation energy and energy required for the hydrogenation process of dibenzyl ether under aqueous condition were calculated by utilizing density functional theory (DFT). First, hydrides (H − ) are formed by the WGSR under alkaline conditions. Then, the formation energy (140.81 kJ/mol) of hydrides and the energy (15.54 kJ/mol) of hydrides attacking the dibenzyl ether to form the transition state were lower than the bond dissociation energy (259.26 kJ/mol) of the dibenzyl ether. That is, the hydrogenation of dibenzyl ether via WGSR prefers to be a nucleophilic reaction rather than a pyrolysis reaction. In the coal liquefaction process, the hydrides produced by WGSR under the catalysis of alkali is conducive to the hydrocracking of oxygen containing functional groups.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
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IF 7.392
Jiayi Qi,Xingkun Qi,Yan Pan,Junshuo Cui,Ying Xiong,Weijun Shan,Haibiao Yu
Sm 0.06 Ni with excellent H 2 O resistance for eliminating N 2 O was prepared by co-precipitation method. Research indicated that the introduction of Sm into Sm 0.06 Ni has the following effects: (1) Sm species (Sm 2 O 3 ) highly dispersed on the surface of Sm 0.06 Ni catalyst, which not only decreased the crystallite size of NiO, but also produced a certain number of edge dislocations and defects. (2) Sm 2 O 3 weakened the Ni-O band and increased the number of active sites. (3) The redox cycle of Ni 2+ + Sm 3+ ↔ Ni 3+ + Sm 2+ was formed on the surface of Sm 0.06 Ni during the reaction. Based on the above changes, Sm 0.06 Ni exhibited superior catalytic performance and much lower E a for the reaction compared with pure NiO. Over Sm 0.06 Ni, the TOF at 350 ℃ was 4.1 × 10 −3 s −1 , 37 times of that over pure NiO. More importantly, Sm 0.06 Ni exhibited excellent H 2 O resistance performance under submitted real reaction conditions, about 76 % N 2 O conversion can be obtained at 400 ℃.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Qiang Liu,Siming Zhu
This study proposes a novel and feasible dissolution and fractionation method of depectinated sugar beet pulp (SBP) in NaOH/Urea/H 2 O, ionic liquid (IL) and alkaline treatment processes. Interestingly, the complicated structure of SBP can be treated with 30 % H 2 SO 4 to increase the dissolution rate. Scanning electron microscope (SEM) analysis confirmed that the appearance of cellulose and hemicellulose obtained by two methods were different. At the same time, two lignin fractions showed irregular high-density clusters, which were composed of a large number of submicron particles. The crystal structure of two cellulose fractions changed from cellulose I to cellulose II. The thermal stability of cellulose and lignin obtained by ionic liquid was slightly better than that obtained by NaOH/urea/H 2 O. Results of Fourier transform infrared (FTIR) and 13 C NMR showed that the chemical structures of SBP cellulose, hemicellulose and lignin regenerated from NaOH/urea/H 2 O and ionic liquid were similar.
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PubMed
高影响因子
SENSORS
·
2021
·Vol. 21
·期 22
·7755
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IF 3.576
Weiliang Chen,Jichao Gao,Jie Tian,Jingyu Zhang
In situ fluorophores were induced on polyvinyl alcohol (PVA) bulk materials by direct femtosecond laser writing. The generation of fluorophores was ascribed to localized laser-assisted carbonization. The carbonization of PVA polymers was confirmed through X-ray photoelectron spectroscopy analysis. The distinct fluorescence responses of fluorophores in various solutions were harnessed for implementing in situ reagent sensors, metal ion sensors, data encryption, and data security applications. The demonstrated water detection sensor in acetone exhibited a sensitivity of 3%. Meanwhile, a data encryption scheme and a “burn after reading” technique were demonstrated by taking advantage of the respective reversible and irreversible switching properties of the in situ laser-induced fluorophores. Taking a step further, a quantitative cobalt ion measurement was demonstrated based on the concentration-dependent fluorescence recovery. Combined with a laser-induced hydrophilic modification, our scheme could enable “lab-on-a-chip” microfluidics sensors with arbitrary shape, varied flow delay, designed reaction zones, and targeted functionalities in the future.Keywords:data security;fluorescence;laser ablation;materials processing;microfluidics
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PubMed
高影响因子
Journal of Chemistry
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2021
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IF 2.506
Xiaohui Song,Shuaiqi Sun,Lingzong Meng,Rongjian Ying,Yafei Guo,Tianlong Deng
The densities and pH values in the system NaBO2–Na2SO4–H2O at 298.15 K and 323.15 K were investigated. Combining the equilibrium constants for different boron species, the distributions of six boron species in the mixed solution were calculated with total boron concentration and pH values. The molar fractions of the six boron species are mainly affected by the total boron concentration and temperature, but rarely affected by the concentration of SO42–. The dominant boron species in the mixed solution at the two temperatures is B(OH)4‒. The mole fraction of B(OH)3, B5O6(OH)4‒, and B3O3(OH)4‒ can be neglected. The polyborate ions are easier to form as the temperature increases. The results of distribution for boron species in this study and those with the Pitzer model can both be used to describe the distribution of boron species in the mixed solution.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
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IF 2.694
Xu Jie,Chen Mengqi,Wei Yan,Hao Shuanghong
In this article, we propose a method of recovering p-MePhSO3K from the industrial by-product of quizalofop-p-ethyl. The phase diagram of the solid–liquid equilibrium system of p-MePhSO3K2CO3–H2O at the temperatures of 15, 25, 35, 45, and 55 °C was determined and plotted. Based on the phase diagram of 25 °C, the separation and recovery process of p-MePhSO3K from the p-MePhSO3K2CO3–H2O system was designed by analyzing the crystallization fields. First, p-MePhSO3K and K2CO3 were crystallized from wastewater in turn through evaporation separation. Then, the crystallized p-MePhSO3K was purified further by washing with ethanol. Finally, the pure p-MePhSO3K was transformed into the intermediate p-toluenesulfonyl chloride and then the intermediate l-p-toluenesulfonate ethyl lactate for quizalofop-p-ethyl production.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Kuo Zhou,Xingfan Wang,Junfang Yang,Fenli Jin,Huan Zhou
The solubility equilibrium of Li+, Na+//Cl–, CO32– −H2O quaternary systems at 323.15 K and 348.15 K was studied via the isothermal solubility equilibrium method, and the complete phase diagrams were obtained including the properties of liquid density and pH. Solid species of LiCl·H2O, Li2CO3, NaCl, and Na2CO3·H2O are found in the quaternary system at 323.15 K and 348.15 K, and one double salt of Li2CO3·Na2CO3 is found at 348.15 K. The liquid phase of two invariant points and five univariant curves at 323.15 and three invariant points and seven univariant curves at 348.15 K in the quaternary system is determined. Li2CO3 covers the largest solid phase region and is hardly influenced by temperature; Li2CO3–NaCl is a stable salt pair, and its cosaturated solubility is the least at the diagonal line of Li2CO3–NaCl.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Fei Yuan,Hua Li,Long Li,Yafei Guo,Shiqiang Wang,Tianlong Deng
Considering the significance of fundamental phase equilibrium data in resource exploitation from salt lake brines, the solid–liquid phase equilibria of the ternary system (KBO2 + K2SO4 + H2O) at 288.15, 308.15 K, and 0.1 MPa were investigated using the isothermal dissolution method. Along this line, the solubilities and physicochemical properties of densities were experimentally determined. Based on the experimental data, phase diagrams and the related physicochemical property diagrams against composition were plotted. It was found that there are one invariant point, two univariate solubility curves, and two crystalline regions corresponding to potassium metaborate hydrate (KBO2·1.33H2O) and arcanite (K2SO4) in the ternary phase diagrams at 288.15 and 308.15 K. In addition, they belong to the hydrate type I and neither double salt nor solid solution was formed. The distributive behaviors of density against the concentration of KBO2 in the equilibrium solution at two temperatures were similar. Moreover, the theoretical values of density were calculated, which were found to be consistent with the experimental values, further demonstrating the accuracy and reliability of this work.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Zheng Ma,Yongyong Li,Yifeng Zheng,Wenlu Li,Xingyu Chen,Xiufu Sun,Xing Chen,Juan Zhou
The cathode of solid oxide electrolysis cell (SOEC) is used as a place for fuel gas electrolysis/co-electrolysis, and its performance significantly affects the efficiency of electrolysis. La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ (LSCM) is a potential SOEC cathode material due to its excellent redox stability and catalytic ability for fuel gas. An electrolyte-supported LSCM/YSZ/LSCM symmetrical cell and LSCM/YSZ/LSCF full cell were prepared and evaluated for high temperature steam electrolysis, carbon dioxide electrolysis and co-electrolysis. Under the applied voltage, both the symmetrical electrolysis cell and the full electrolysis cell can effectively electrolysis CO 2 and H 2 O. During the experiment, by changing the operating conditions, the influence of different temperatures, concentration of CO 2 and H 2 O, and applied voltage was studied to evaluate the electrochemical performance of SOEC. In order to further verify the long-term performance of SOEC, constant voltage was applied for co-electrolysis of CO 2 and H 2 O. During the entire electrolysis process, the SOEC showed a stable current density of 0.1A·cm -2 under the applied voltage 1.5 V for more than 24 h.
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高影响因子
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