JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
·
IF 2.196
Dong Fu,LeMeng Wang,XiangFeng Tian
The surface tension (γ) of 2-diethylaminoethanol (DEAE), DEAE-monoethanolamine (MEA), and DEAE-piperazine (PZ) aqueous solutions was measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fraction of DEAE, MEA and PZ respectively ranged from 0.30 to 0.50, 0.05 to 0.15 and 0.025 to 0.075. An equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fraction of amines on the surface tension were demonstrated on the basis of experiments and calculations.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yuanshui Liu,Feng Luo,Denghui Jiang,Linzhuang Xing,Liwei Song,Zhimin Li
Lead-based Pb(Zr, Ti)O 3 ceramics have been widely applied in piezoelectric actuators, and yet high temperature stability and large strain have been pursued for further application. In this work, a novel PbZrO 3 –PbTiO 3 -(Bi 0.5 Na 0.5 )TiO 3 (PZ-PT-BNT) piezoelectric ceramic is designed and prepared by solid-state route. It is found that the introduction of BNT constituent enhances the relaxation behavior of PZ-PT ceramic, inhibits the abrupt change in dielectric properties near Curie temperature , and increases the proportion of tetragonal phase with high temperature stability. Meanwhile, the patterns of electric domains are intentionally modified by adjusting composition of PZ-PT-BNT. Short and broad electric domains in PZ-PT-0.03BNT ceramic are observed by piezoresponse force microscopy, which are insensitive to temperature and have faster response under electric field, contributing to strain characteristics. As a result, through integrating phase structure and electric domain configuration, a strain of 0.21% and excellent temperature stability where the variation of strain is less than 8% in the temperature range of 25–250 °C are achieved in PZ-PT-0.03BNT ceramic. The findings provide an effective strategy for improving the strain stability of PZ-PT-based piezoelectric ceramics, and demonstrate that PZ-PT-BNT ceramics have potential application prospects in high-temperature piezoelectric actuators.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Xiaoyun Chen,Guohua Jing,Bihong Lv,Zuoming Zhou
The non -aqueous solid-liquid biphasic solvent of 2-amino-2-methyl-1-propanol (AMP)/piperazine (PZ)/dipropylene glycol dimethyl ether (DME) features a high CO 2 absorption loading, favorable phase separation behavior and high regeneration efficiency. Different with the liquid-liquid phase change solvent, the reaction kinetics of CO 2 capture into solid-liquid biphasic solvent was rarely studied. In the present work, the reaction kinetics of CO 2 absorption into AMP/PZ/DME solid-liquid biphasic solvent was investigated into the double stirred kettle reactor. The absorption reaction followed a pseudo-first-order kinetic model according to the zwitterion mechanism. The overall reaction rate constant ( k ov ) and the enhancement factor ( E ) of CO 2 absorption both increased with increasing temperature. The total mass transfer resistance of the absorbent decreased with increasing temperature and increased with increasing absorption loading, so the higher reaction temperature was conducive to the absorption, and the liquid phase mass transfer resistance was the main factor affecting the absorption rate.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Dong Fu,LeMeng Wang,XiangFeng Tian
The surface tension (γ) of 1-dimethylamino-2-propanol (DMA2P), DMA2P-monoethanolamine (MEA), and DMA2P-piperazine (PZ) aqueous solutions was measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of DMA2P, MEA and PZ respectively ranged from 0.30 to 0.50, 0.05 to 0.15 and 0.025 to 0.075. An equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The surface thermodynamics including surface enthalpy and surface entropy were determined and their concentration dependence was analysed.
研究领域:
物理化学
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热力学
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表面科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 19
·28700-28709
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IF 5.6
Zhengxiu Ma,Wenwu Cao
Obtaining a large piezoelectric coefficient and high temperature stability simultaneously in piezoelectric ceramics is a formidable challenge. By strategically designing a morphotropic phase boundary (MPB) composition with localized structural heterogeneity, 0.1 Pb(Yb 1/2 Nb 1/2 )O 3 -0.435PbZrO 3 -0.465PbTiO 3 -1mol% Sm ceramic demonstrates outstanding electromechanical performance with d 33 = 585 pC/N, k p = 0.66, T C = 365 °C, and outstanding temperature stability, the piezoelectric coefficient d 33 varies less than 10 % in the temperature range of 25–260 °C, making it a promising candidate for applications in high-temperature transducers and sensors. Our investigations revealed that the enhanced piezoelectricity originates from Sm 3+ induced intensification of relaxor behavior and structural refinement of hierarchical nanodomains, while the high temperature stability is attributed to the larger volume fraction of ferroelectric domains of the T-phase, which provide “pinning” of the nanodomains through the hierarchical domain structure.
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Feng Xie,Guanghuan Li,Feng Yan,Chengbin Xiao,Pengju Wang,Xuehua Shen,Biao Yang,Han Lin,Huarong Luo,Zuotai Zhang
Solid–liquid biphasic absorbents are a promising solution for overcoming the high-energy consumption challenge faced by liquid amine-based CO2 capture technologies. However, their practical applications are often hindered by difficulties in separating viscous solid-phase products. This study introduces a novel nonaqueous absorbent system (PD/PZ/NMP) composed of 4-amino-1-methylpiperidine (PD), piperazine (PZ), and N-methyl-2-pyrrolidone (NMP), engineered to produce easily separable powdery products. The PD/PZ/NMP absorbent achieves a CO2 loading of 0.86 mol-CO2/mol-amine, with 91% of CO2 concentrated in the solid phase. It demonstrates excellent cyclic stability, maintaining a regeneration efficiency of 91% after five regeneration cycles, and reduces energy consumption by 52% compared with the conventional monoethanolamine absorbent. Remarkably, PZ plays a crucial role in regulating the crystal composition of solid-phase products, transforming them from a viscous state to a crystalline powder. Characterization and density functional theory analysis explain the crystal-phase regulation mechanism: PD absorbs CO2 to form zwitterions (PDH+COO–), affording viscous products, and PZ forms protonated amines (PZH+) and monocarbamates (PZCOO–), which interact with PDH+COO– via hydrogen bonding to form a crystalline powder. These findings demonstrate the CO2 capture efficacy of the PD/PZ/NMP absorbent and provide a robust theoretical framework for fabricating solid–liquid biphasic absorbents tailored for practical applications.
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Junlei Zhan,Beibei Wang,Liangliang Zhang,Bao-Chang Sun,Jiwen Fu,Guang-wen Chu,Haikui Zou
This work presented experimental and modeling studies on the simultaneous absorption of H2S and CO2 into the N-methyldiethanolamine (MDEA) and piperazine (PZ) solution in a rotating packed bed (RPB). The effect of different operating conditions, including MDEA concentration (CMDEA), PZ concentration (CPZ), liquid volumetric flow rate (L), temperature (T), and high gravity factor (β) on the absorption efficiencies of H2S and CO2 (ηH2S and ηCO2) were investigated. The results showed that ηH2S and ηCO2 were significantly affected by CMDEA, CPZ, L, and β. ηH2S and ηCO2 could reach 99.98 and 96.51%, respectively. Furthermore, an artificial neural network (ANN) model was established to predict ηH2S, ηCO2, and mass-transfer coefficient (KGa). Results showed that the predicted values were in good agreement with the experimental values (within deviations of ±10% for H2S and CO2). This work provides a potential technology of simultaneous absorption of H2S and CO2 for the biogas upgrade.
研究领域:
化学工程
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环境工程
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过程控制
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DOI
高影响因子
Greenhouse Gases-Science and Technology
·
2021
·Vol. 11
·期 5
·974-987
·
IF 2.013
Shunji Kang,Zhi Shen,Xizhou Shen,Liuya Fang,Li Xiang,Wenze Yang
The carbon dioxide discharged from fossil fuels combustion products is considered as a major contributor to global warming. The current investigation aimed at CO 2 desorption kinetics in 3.25 mol L –1 methyldiethanolamine (MDEA)–0.1 mol L –1 piperazine (PZ) rich amine aqueous solution with thermo-gravimetric analysis (TGA) method under different heating rates of 2.5, 5, 10, and 20 °C min –1 . The kinetics parameters were determined by comparison of 40 mechanism functions with thermal analysis kinetic method. The average activation energy E was 59.16 kJ mol –1 , preexponential factor A was 5.54 × 10 8 , and the most probable mechanism function was G( α ) = [–ln(1 – α )] 3/2 . In addition, the kinetic parameters of CO 2 desorption process from three rich amine aqueous solutions (MDEA, MDEA + diethanolamine(DEA), MDEA + PZ) were compared and the influence of kinetic parameters was further discussed. The desorption rate models of three rich amine aqueous solutions were established and desorption rates were well predicted. The order of desorption rate inferred from desorption rate model was MDEA > MDEA + DEA > MDEA + PZ. The results indicated that TGA combined with thermal analysis kinetics was an effective and quick method with high accuracy, easy operation, and good repeatability for screening absorbents preliminarily in laboratory. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.
研究领域:
化学工程
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环境科学
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热分析
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 36
·30311-30323
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IF 9.5
Yan Zhu,Guicheng Jiang,Shengpeng Han,Ran Lei,Piqi Song,Yingchun Liu,Shan-Tao Zhang,Danqing Liu,Bin Yang,Wenwu Cao
Lead-based relaxor ferroelectric materials are extensively utilized in various fields such as ultrasonic transducers, sensors, high-precision displacement control, and underwater acoustic detection, owing to their exceptional electrical properties. Nevertheless, the application of lead-based relaxor ferroelectric ceramics in high-end ultrasonic transducers is constrained by their suboptimal electromechanical coupling properties and inadequate overall piezoelectric performance. Here, by employing the strategy of “collaborative design of local structural heterogeneity and texturing”, excellent comprehensive electromechanical properties (d33 = 1310 pC N−1, k33 = 0.87, and TC = 170 °C) were achieved by introducing rare earth Eu3+ ions into [001]PC-textured Pb(Mg1/3Nb2/3)O3–PbZrO3–PbTiO3 (PMN-PZ-PT) ceramics. Their d33 is about 5.5 times that of ordinary ceramic materials without rare earth ion doping. Furthermore, the examination of PFM and relaxor properties reveals that improving relaxor properties in ceramics increases the formation of nano-scale domains, which is directly responsible for their exceptional piezoelectric and electromechanical properties. Nano-scale domain structures are formed as a result of local structural heterogeneity caused by rare earth ion doping and the stress induced elastic field in the texture process. This research will be essential for the continued development and application of high-performance ferroelectric ceramic materials in devices.
研究领域:
材料科学
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铁电材料
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压电陶瓷
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功能材料
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guo Liu,Shuhao Tian,Chang Li,Yizhi Li,Zhiming Deng,Zhijun Zou,Jiayou Tao,Kun Tao,Hongcen Yang,Xiaoxiang Sun,Fen Li,Erqing Xie,Zhenxing Zhang
Catalytic conversion of polysulfides is regarded as a crucial approach to overcome the chronic challenges from polysulfides shuttling and sluggish redox kinetics. Heterostructure catalysts can synergistically combine the advantages of each component with an interfacial built-in electric field (BIEF), demonstrating outstanding adsorption and catalytic effects. However, the relationship between surface electronic structure and interfacial charge redistribution remains unclear. Here, surface-oxidized MXene/α-Fe 2 O 3 (MXTiO/α-Fe 2 O 3 ) heterostructure is developed as model catalyst to clarify the enhancement mechanism of polysulfides adsorption and conversion. Theoretical and experimental analysis confirms that the modified MXene as an electron acceptor steals partial electrons from α-Fe 2 O 3 through interfacial asymmetric Ti-O-Fe bridge bonds, inducing the spontaneous charge redistribution. The electrons transfer through Ti-O-Fe channels creates electron-deficient Fe sites on the surface, which not only reduces the antibonding orbital electron occupation, leading to strengthening the d -p orbital hybridization between surface Fe and polysulfides, providing a strong sulfur affinity, but also weakens S S bonds for accelerated cleavage. The resulting catalyst enables Li-S batteries with a capacity of 538 mAh g −1 at 5.0C. This investigation establishes a fundamental correlation between interfacial electron delocalization and surface electronic configuration modulation, thereby providing a rational insight for designing advanced heterostructured electrocatalysts in high-performance energy storage/conversion applications.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Denghui Jiang,Feng Luo,Yuanshui Liu,Kao Pei,Linzhuang Xing,Zhimin Li
Low strain limits the further application of Pb(Zr,Ti)O 3 (PZT) piezoelectric ceramics in actuators. Herein, a ternary piezoelectric ceramic x PbTiO 3 -(0.95- x )PbZrO 3 -0.05(Bi 0.5 Na 0.5 )TiO 3 ( x PT-PZ-BNT) is proposed and prepared by solid-state method to improve the strain characteristics. Results indicate that a biased electric field is intentionally constructed by defects arising from the incorporation of BNT into PZ-PT ceramic, which promotes non-180° domains to restore to initial states, thereby contributing to the increase in strain. Moreover, the electric domain configuration is efficiently modified by adjusting the component proportion in x PT-PZ-BNT ceramics, in which the 0.42 PT-PZ-BNT presents short and broad domains with fast response to external electric field. Rayleigh analysis indicates that the strain contributed by domain switching is dominant in PT-PZ-BNT ceramics under a high electric field. Consequently, a large strain of 0.4% is achieved in 0.42 PT-PZ-BNT ceramic with the variation less than 10% in the temperature range of 25∼175 °C. This study not only deeply analyzes the effect of domain configuration on the strain for PZT piezoelectric ceramics, but also demonstrates an effective approach to increase the strain through constructing internal biased electric field and regulating domain configuration.
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Haile Liu,Tursun Abdiryim,Ruxangul Jamal,Xiong Liu,Mariyam Niyaz,Lielie Liu,Hujun Zhang,Dongna Zou,Junxia Li,Yanyan Song,Jin Wei
The ideal material for detecting ultraviolet(UV) is TiO 2 nanorods (TiO 2 NRs). However, the photosensitive response speed and response speed of TiO 2 NRs are affected by its surface defects . We need to choose an appropriate method to solve this problem. In this study, TiO 2 NRs and D-A-D type conducting polymer containing pyridazine as the acceptor unit and 3,4-propylenedioxythiophene as the donor unit 3,6-bis (2- (3,4-propylidene dioxythiophenyl)) pyridazine are electrochemically combined to fabricate UV photodetectors . The structure of the material is analyzed by SEM , mapping, XRD , FT-IR, UV–vis and XPS , indicating the strongly enhanced synergistic effect between PProDOT-Pz and TiO 2 NRs and the homogeneous distribution of polymer on the TiO 2 NRs surface. The results show that under the low power (0.35 mW cm −2 ) UV illumination, the hybrid system has high responsivity (342.19 mA W −1 ) large detectivity (1.36 × 10 11 Jones) fast time pulse response (T rise = 6.2 s, T decay = 7.7 s) and EQE (110.35%) at the bias voltage of 3 V. More importantly, the photodetector works stably with good repeatability, which shows that the device configuration based on TiO 2 NRs and PProDOT-Pz heterojunction is proved to be an excellent candidate device with high sensitivity and fast response for UV signal.
研究领域:
材料科学
·
光电材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）