JOURNAL OF POLYMER RESEARCH
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2025
·Vol. 32
·期 12
·467
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IF 2.8
Li Xiaoyun,Wang Zhen,Wang Junwei,Zhang Yingan,Kang Maoqing,Li Qifeng,Zhao Yuhua,Li Huanting
Bifunctional reactive cyclic carbonate compounds were synthesized and introduced into the epoxy system acting as diluting plasticizer and toughening agent to improve their plasticity and flexibility. Effects of content and structure of cyclic carbonates on the processibility, mechanical performances and thermal properties of the materials were investigated. An impressive improvement in viscosity reduction and mechanical performances is observed by loading of cyclic carbonate. The modified epoxy resin composites exhibit a significant enhancement in mechanical properties at a 30 wt% loading of cyclic carbonate with the tensile strength 170.6% higher than the original resin and 23.9% improvement in the flexural strength. The enhancement in material performance can be attributed to a combination of factors: the presence of soft segments, hydrogen bonding interactions, decrease in crosslinking density, and the plasticizing effect of unreacted components. Moreover, the thermal properties like degradation temperature, T g temperature and thermo-mechanical properties of epoxy resin composites were also affected by the introduction of cyclic carbonate.
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Nature Communications
·
2025
·
IF 15.7
Ren Yuqi,Cheng Miao,He Hongbin,You Changjun,Duan Lunbo,Sun Zhenkun,Peng Ruoxuan,Zhu Yuan-Hao,Zhang Hongyang,Zhou Jiancheng,Huang Kai,Guan Jie,Li Naixu
CO 2 -to-hydrocarbon fuel conversion via artificial photosynthesis is limited by catalyst poisoning under high O 2 partial pressures and sluggish C 2 -product formation. Herein, Ru 0.6 Cu 1 (Cu 0 –Cu 1+ )/CeO 2 catalysts with adaptive O 2 tolerance are prepared by O 2 -mediated dynamic interfacial reconstruction. Single-atom Ru doping at Ce lattice sites creates a trigonal prismatic coordination configuration, enabling proton-coupled electron transfer and accelerating H 2 O dissociation. Photothermal effect promotes O 2 -driven self-assembly of Cu 0 –Cu 1+ charge-gradient interfaces within Ru/Cu alloy clusters, thereby optimizing the adsorption behavior of * CHOCO intermediates and restructuring the C–C coupling pathway. Interfacial charge cascade transfer and geometric site synergy thermodynamically shift the product selectivity from C 1 to C 2 , as determined by operando spectroscopy and electronic structure analysis. Under concentrated solar irradiation, the catalyst produces 549 ± 20 μmol·g −1 C 2 H 4 with 74.3% selectivity and 0.5% solar-to-chemical energy conversion efficiency—25-fold higher than that in non-concentrated systems. Dynamic interfacial regulation facilitates precise carbon chain synthesis in complex reaction networks.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yukai Chen,Yiyi Ji,Ruizhe Wang,Dan Wang,Rulin Dong,Hengming Huang,Jiaojiao Fang
To solve the problems of low utilization over the solar spectrum, elevating the photon absorption efficiency and exploiting long-wavelength photons are of great significance. Herein, a CdSe/polydopamine(PDA)@SiO 2 core–shell opal photonic crystal structure with excellent photothermal effect and photon absorption was fabricated for the first time. The photonic bandgap (PBG) effect and the slow photon effect of the photonic crystal structure helps the absorbing of photons and the photothermal effect of PDA coating shells provides higher reacting temperature for photocatalysis. Consequently, the S2P0 sample (without PDA coating) whose PBG is consistent with the absorption edge of CdSe photocatalyst exhibits a three times higher CO 2 reduction efficiency. Benefited from the photothermal effect of PDA, the S2P20 sample (20% PDA coating) shows a 4.77-fold efficiency than the blank sample, proving the reliability of the design. Moreover, the PDA shells enhance the adhesion for robust photonic crystal films and show other applications in fields like textiles. This work demonstrates a synergistic utilization of photothermal effect and photonic crystal structure for efficient photocatalytic CO 2 reduction and revealing more potential applications.
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ENERGY & FUELS
·
2025
·
IF 5.3
Runfen Zheng,Lixin Wei,Yuxin Bai,Jianfei Man,Jian Ye,Huiping Zhang,Yihan Wang
To address the issues of poor regeneration performance and high regeneration energy consumption associated with traditional CO2 absorbents, the development of novel phase-change absorbents has become a key area of research. In this study, a new phase-change absorbent system, DEGDEE-AEEA-AMP, is developed, using N-(2-hydroxyethyl)ethylenediamine (AEEA) as the main absorbent, bis(2-ethoxyethyl)ether (DEGDEE) as the phase-separation agent, 2-amino-2-methyl-1-propanol (AMP) as the activator, and water as the solvent. The performance of this system is compared with that of monoethanolamine (MEA) at a 30% mass concentration, which serves as the reference standard. The study includes absorption, desorption, corrosion, cyclic absorption–desorption experiments, and regeneration energy consumption estimations. The results indicate that the volume of the rich phase in the DEGDEE-AEEA-AMP (DAP) system constitutes 56.7% of the total volume. When the AMP mass fraction is 15%, the absorption capacity reaches 2.52 mol·kg–1, which is 14.0% higher than that of MEA. The maximum desorption rate is 13.19 × 10–3 mol·kg–1·s–1, which is 3.39 times higher than that of MEA. The minimum regeneration energy consumption is 2.742 GJ·t–1 CO2, representing a 29.9% reduction compared to 30% MEA. The corrosion rate of the rich liquid is 0.230 mm/a, 1.32 times that of MEA, but it can be significantly reduced by adding anhydrous Na2SO3. When the AMP mass fraction is 15%, the DAP phase-change absorbent system exhibits high absorption and desorption performance, good cyclic stability, and lower regeneration energy consumption.
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ENERGY & FUELS
·
2025
·
IF 5.3
Yuxia Zhu,Yuze Zu,Wei Xu,Yinghui Sun,Ying Li,Jie Bai
Coal gangue, the primary solid waste generated during coal mining, is mainly composed of silicon and aluminum oxide. Achieving its high-value utilization is crucial for resource recycling and sustainable development. In this study, we developed a method to synthesize ZSM-5 zeolite (ZSM-5-CG) using coal gangue as the sole silica–alumina source. The synthesis process, crystal growth mechanism, and catalytic performance of the resulting zeolites were systematically investigated. Compared with ZSM-5 prepared from commercial raw materials (ZSM-5-C), the coal gangue-derived synthesis required a significantly lower amount of template due to the favorable interaction between gangue-derived species and the template. Although crystallization in both systems follows the “solid–liquid phase transformation” mechanism, coal gangue, as a natural mineral source, exhibits significant differences in Si and Al coordination environment compared to commercial inorganic raw materials. These differences alter the dissolution and migration behaviors of Si and Al species in the mother liquor, leading to a synchronous release of these components during crystallization. As a result, nucleation and crystal growth processes happen more slowly, yielding a lower overall growth rate than that observed in systems derived from commercial raw materials. The obtained ZSM-5-CG was further applied in CO2 cycloaddition and methanation reactions, exhibiting catalytic activity comparable to that of ZSM-5-C, owing to its abundance of acid sites and large surface area. A cost analysis revealed that the total production cost of ZSM-5-CG was 29.7% lower than that of ZSM-5-C. This work provides a novel and economically viable route for the high-value utilization of coal gangue and highlights the potential of ZSM-5-CG in CO2 catalytic conversion.
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Nature Communications
·
2025
·
IF 15.7
Yu Yaodong,Wang Zuochao,Wang Weizhou,Han Jiani,Dong Tian,Jin Guangzhe,Li Hongdong,Lv Qingliang,Kutchin Alexander V.,Lai Jianping,Wang Lei
The development of efficient acidic CO 2 reduction reaction (CO 2 RR) to high value-added chemical HCOOH at high current density (>1 A cm -2 ) is crucial. However, addressing high potential, low Faradaic efficiency (FE), and poor stability simultaneously under acidic conditions remains challenging. Here, we construct small PdC x interstitial compounds and engineer the interstitial atoms to modulate the catalyst’s soft acid strength, thereby overcoming the triple challenge of “low overpotential-high current density-high stability” in acidic CO₂RR to HCOOH. Density functional theory (DFT) calculations and experimental characterization reveal that interstitial carbon infusion modulates Pd’s soft acid strength and weakens the Pd-O bond energy to form and desorb HCOOH, circumventing CO poisoning of the catalyst. Meanwhile, interstitial carbon infusion optimizes electronic structures, enhancing OCHO intermediate coverage as well as the effective retention and utilization of *H. This effect suppresses hydrogen evolution reaction (HER) while enhancing HCOOH selectivity. The optimized PdC 0.13 /CNT achieves >95% FE HCOOH and demonstrates stability in a proton exchange membrane (PEM) electrolyzer, maintaining 1000 mA cm -2 operation for 500 hours at 1.8 V cell voltage.
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APPLIED ENERGY
·
2017
·
IF 7.182
Peng Wang,Yafei Guo,Chuanwen Zhao,Junjie Yan,Ping Lu
Large quantities of wood ashes derived from biomass materials combustion potentially threaten the ecological environment. Recycling of the wood ashes as solid sorbents for pollutants control is an economical and environmentally friendly route. In this work, waste wood ashes (WAs) were modified with tetraethylenepentamine (TEPA), monoethanolamine (MEA), diethanolamine (DEA), polyethyleneimine (PEI), and diethylenetriamine (DETA) to synthesize solid sorbents with enhanced CO 2 capture performances. CO 2 capture behaviors of the synthesized sorbents were tested under 60 °C, 5.0%CO 2 + 5%H 2 O using a fixed-bed reactor, and sorbent regeneration behaviors were evaluated under 120 °C, 10 °C/min and 100%N 2 . The sorbent synthesized of ashes collected from straw-fired power plants modified with TEPA (TEPA-WA-1) is identified as the optimum candidate with superior capability for CO 2 capture and sorbent regeneration. CO 2 capture capacity of TEPA-WA-1 increases first and then decreases with the increase of amine loading. Sufficient amine loading can provide substantive active sites for enhanced CO 2 chemisorption, whereas excessive loading will cause particle aggregation and pore structure blockage and affect its CO 2 capture capacity adversely. The maximum CO 2 capture capacity of 2.02 mmol CO 2 /g is obtained with an amine loading of 45 wt.%. The desired sorbent is demonstrated to be stable during 10 cyclic operations. Moreover, the presence of acid impurities (SO 2 and NO 2 ) exerts negative effect on the cyclic CO 2 capture and sorbent regeneration performances of the synthesized sorbent. It is mainly attributed to sorbent deactivation induced by the formation of byproducts and weakened physical properties for the sorbent exposed in acid impurities.
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JOURNAL OF MEMBRANE SCIENCE
·
2011
·
IF 3.673
Shuangjie Yuan,Zhi Wang,Zhihua Qiao,Mingming Wang,Jixiao Wang,Shichang Wang
In this work, the idea of modifying the fixed carrier membrane for CO 2 separation by a cross-linking agent containing carriers to simultaneously improve the CO 2 -induced plasticization resistance, the CO 2 permeance and the CO 2 /N 2 selectivity of the membrane was suggested and confirmed. Polyvinylamine (PVAm), a polymer to prepare fixed carrier membrane for CO 2 separation, was synthesized by partial acidic hydrolysis of poly(N-vinylformamide) and further modified by using ethylenediamine (EDA). Elemental analysis, ATR-FTIR, XPS and XRD were employed to characterize the EDA modified PVAm. The result of ATR-FTIR and XPS showed that the EDA can effectively cross-link PVAm by the hydrogen bonds formed between amine groups of EDA and either amine or amide groups in PVAm. The composite membranes were developed by coating the PVAm–EDA mixed solutions with different mass ratio of EDA/PVAm ( m EDA / m PVAm ) on polysulfone (PS) ultrafiltration membrane. The effects of m EDA / m PVAm in coating solution and wet coating thickness on the gas performance of the PVAm–EDA/PS composite membranes were investigated. The PVAm–EDA/PS membrane prepared by using coating solution with proper m EDA / m PVAm (from 1 to 3) showed higher CO 2 permeance and much higher CO 2 /N 2 selectivity as well as better CO 2 -induced plasticization resistance than that of the PVAm/PS membrane. It is attributed to two factors: (1) the densification of polymer matrix by moderate hydrogen bond cross-linking; and (2) the increase of total carrier content in membrane. As CO 2 -induced plasticization resistance improves, the selective layer thickness of the PVAm–EDA/PS membrane can be further reduced to obtain a higher CO 2 permeance and a proper CO 2 /N 2 selectivity simultaneously. For CO 2 /N 2 gas mixture (20/80 by volume), the PVAm–EDA/PS membrane prepared by using coating solution with m EDA / m PVAm of 3 and 50 μm wet coating thickness displayed a CO 2 permeance of 607 GPU and CO 2 /N 2 selectivity of 106 at CO 2 partial pressure of 0.02 MPa. The separation performance stability of the PVAm–EDA/PS membranes was investigated for 300 h and no deterioration in membrane permselectivity was observed. Moreover, the PVAm–EDA/PS membrane had no obvious degradation after exposure to H 2 O-saturated SO 2 of 300,000 ppm h.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shuqing Song,Mingang Zhao,Zheyuan Guo,Yanxiong Ren,Jianyu Wang,Xu Liang,Yunchuan Pu,Shaoyu Wang,Hanze Ma,Xuerui Wang,Guangwei He,Zhongyi Jiang
Mixed matrix composite membranes (MMCMs) hold great potential to realize efficient CO 2 removal from natural gas. However, the reduction of separation performance arising from the interfacial defects, significant plasticization and aging effect in the thin films severely limit their application. Herein, we fabricated a series of polyimide MMCMs with MOF-protruding structure wherein amino-functionalized ZIF-8 nanocrystals nearly penetrate the thin selective layer. Through engineering the interfacial interactions, e.g., covalent or hydrogen bondings , we successfully fabricated defect-free MMCMs with the thickness ranging from 140 to 280 nm. The stronger interfacial interactions eliminate the interfacial defects and restrict the mobility of polymer chains under high pressure. Accordingly, the MMCM displays a high CO 2 permeance of 778 GPU and a CO 2 /CH 4 selectivity of 34 with significantly improved resistance to plasticization and aging. Considering the superior performance, we anticipate our work could provide guidelines on designing advanced MMMs to tackle critical separations.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Zeguang Yin,Ke Wang,Pengfei Zhao,Xiaoli Tang
The water hydration and subsequent calcination (denoted as hydration–calcination) technique was used to modify the microstructure of lithium orthosilicate (Li4SiO4) prepared by solid-state reactions. The original and modified Li4SiO4 sorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, scanning electron microscopy, and thermogravimetric analysis. The cyclic capacity of these sorbents was further examined using a dual fixed-bed reactor. After treatment by water hydration, most of the Li4SiO4 transformed into LiOH and Li2SiO3. Moreover, following subsequent calcination, the sample exhibited a looser structure with a smaller particle size compared with the original Li4SiO4. This favorable structure was responsible for improved CO2 chemisorption properties, as measured by a higher capacity, faster absorption kinetics, and improved stability.
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AICHE JOURNAL
·
2012
·Vol. 59
·期 1
·215-228
·
IF 2.261
Zhihua Qiao,Zhi Wang,Chenxin Zhang,Shuangjie Yuan,Yaqun Zhu,Jixiao Wang,Shichang Wang
Polyvinylamine (PVAm) was modified using a cross-linking agent containing carriers piperazine (PIP). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X-ray diffraction were used to characterize the PIP-modified PVAm. The PVAm–PIP/polysulfone (PS) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (m PIP /m PVAm ) on the PS ultrafiltration membrane. The effects of m PIP /m PVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yingchao Hu,Hongyuan Lu,Zhe Lv,Ming Zhang,Ge Yu
The traditional Li 4 SiO 4 -based CO 2 sorbent pellets prepared from mechanical granulation methods usually presented densified microstructures. Hence, wheat straw, an agricultural waste featured with huge production and low cost, was used as porosity creator to improve the microstructures and CO 2 capture performance of Li 4 SiO 4 pellets. The results indicated that wheat straw effectively enhanced the cyclic CO 2 sorption capacity of the pellets. In particular, 30 wt% wheat straw-templated Li 4 SiO 4 pellets (LA-WS30) exhibited the capacity of ~0.15 g/g that is almost twice as high as that of unmodified pellets. The enriched porosity and improved porous structures resulted from the quick release of burning gases was considered as the main reason for the performance enhancement. In addition, the alkaline (K and Na) salts in wheat straw played a positive role in CO 2 sorption of Li 4 SiO 4 pellets due to the reduced diffusion resistance. However, the pore plugging of residual wheat straw ashes after high-temperature treatment decreased the contact areas and, thus, led to the capacity reduction. To conclude, the comprehensive performance of wheat straw-templated Li 4 SiO 4 pellets is the result of the combined effects of porosity creation, alkali doping and pore plugging by ashes.
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