JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2025
·
IF 6
Qinghai Long,Jing Wang,Tiantian Ping,Shufeng Shen
Nonaqueous absorbents have shown great potential in lowering regeneration energy for energy-efficient CO 2 capture. The effect of reaction media with varying solvent characteristics (polarity, solubility parameter and dielectric constant) on kinetic behaviors deserves to be discovered. In this work, CO 2 absorption flux against CO 2 partial pressure was determined in a stirred cell reactor at temperatures of 283.2–303.2 K with 1.0–5.0 mol L −1 2-(butylamino)ethanol (BAE) in nonaqueous 2-butoxyethanol (2-BE). Physicochemical properties and the physical mass transfer coefficients were also measured and represented by proposed correlations. The overall reaction rate constants were derived under the well-defined pseudo-first-order regime conditions. The partial reaction order with respect to BAE was found to be about 2.0 in 2-BE and 1.0–1.3 in water respectively, which reveals that the formation of ionic products may be highly depressed in solvent with low Hansen solubility parameter (HSP) resulting in the increasing reaction order. The overall third-order kinetic data can be well represented by termolecular mechanism model with AARD of 10.5 %. The findings will provide fundamental support for further pilot-scale performance demonstration.
研究领域:
化学工程
·
环境科学
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yingyang Song,Junyu Lang,Qingrui Zeng,Jinping Cheng,Mingce Long
Monoethanolamine (MEA)-based carbon dioxide absorption is one of the effective carbon capture, utilization, and storage (CCUS) technologies but is significantly restricted by the high energy consumption in the regeneration of rich amine solution. Solid acid catalysts have the potential to reduce energy consumption, while the exploration of highly active catalysts with abundant Bro̷nsted and Lewis acid sites remains needing. We developed an efficient solid acid catalyst, niobium-modified HZSM-5 (Nb/HZ), to facilitate CO2 desorption from the CO2-captured MEA solutions. The Nb/HZ catalysts with various niobium loadings were synthesized by using an impregnation method. HZSM-5 retained its pore structure and large surface area after niobium incorporation. The catalyst with 4% Nb (4.0-Nb/HZ) has the highest activity and stability, with 61% increase in the desorption rate, 50% increase in the desorbed CO2 amount, and 37% reduction of relative heat duty. According to theoretic calculations and experimental analyses, the Nb/HZ catalyst provides abundant Bro̷nsted and Lewis acid sites to facilitate carbamate adsorption, proton transfer, and carbamate breakdown, thus reducing the activation energy for CO2 desorption. This work provides a valuable solid acid catalyst for amine-based CO2 capture and also brings insights for the development of a novel solid acid for diverse catalysis.
研究领域:
化学工程
·
催化科学
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Small
·
2024
·Vol. 20
·期 38
·2401387
·
IF 13
Chaochao Cao,Jingwen Yang,Shaobo Yang,Song Yan,Chaoze Liu,Dong Wang,Yanming Xue,Xiongwei Qu,Chengchun Tang
Bulk hexagonal boron nitride ( h -BN) ceramics with structural integrity, high-temperature resistance and low expansion rate are expected for multifunctional applications in extreme conditions. However, due to its sluggish self-diffusion and intrinsic inertness, it remains a great challenge to overcome high-energy barrier for h -BN powder sintering. Herein, a cross-linking and pressureless-welding strategy is reported to produce bulk boron nitride nanosheets (BNNSs) ceramics with well-crystalized and dense B–N covalent-welding frameworks. The essence of this synthesis strategy lies in the construction of >B─O─H 2 C─H 2 C─H 2 N:→B< bond bridge connection structure among hydroxyl functionalized BNNSs (BNNSs-OH) using bifunctional monoethanolamine (MEA) as cross-linker through esterification and intermolecular-coordination reactions. The prepared BNNSs-interlaced ceramics have densities not less than 1.2 g cm −3 , and exhibit exceptional mechanical robustness and resiliency, excellent thermomechanical stability, ultra-low linear thermal expansion coefficient of 0.06 ppm °C −1 , and high thermal diffusion coefficient of 4.76 mm 2 s −1 at 25 °C and 3.72 mm 2 s −1 at 450 °C. This research not only reduces the free energy barrier from h -BN particles to bulk ceramics through facile multi-step physicochemical reaction, but also stimulates further exploration of multifunctional applications for bulk h -BN ceramics over a wide temperature range.
研究领域:
材料科学
·
纳米技术
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hongrui Cheng,Wensong Wang,Haijiang Qiu,Fushan Li,Yuanhui Zheng
Due to their excellent optical performance, lead halide perovskite nanocrystals (PeNCs) have been widely used in optoelectronic devices. However, the presence of surface defects such as localized trap states severely hampers their practical application in optoelectronic fields. In this work, we have developed a simple method to reduce surface defects by introducing sulfuric acid after the nucleation of CsPbI3 PeNCs is complete. Sulfate ions effectively interact with the exposed metal lead ions on the surface of perovskite NCs, leading to surface passivation. This process represses nonradiative recombination and significantly enhances the luminescence efficiency of PeNCs. Moreover, the passivated CsPbI3 PeNCs with SO42– exhibit a lower overall energy-level structure compared to that of pristine CsPbI3 PeNCs, promoting improved electron injection. Benefiting from this highly effective passivation strategy, light-emitting diodes (LEDs) based on SO42–-passivated PeNCs exhibit an optimal external quantum yield of 9.94% and luminance of 2182 cd m–2, surpassing the performance of LEDs made from pristine PeNCs.
研究领域:
材料科学
·
光电领域
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Gels
·
2025
·Vol. 11
·期 4
·242
·
IF 5.3
Yicheng Zhu,Yichen Zhou,Xing Zhang,Pengju Pan,Jinjun Yang,Chengtao Yu
Ion-conductive gels (ICGs) are essential for achieving human–machine interfaces, bioelectronic applications, or durable wearable sensors. However, traditional solvent-dependent ICGs face bottlenecks such as dehydration-induced failure and challenges in achieving a balance between conductivity and mechanical properties. Here, this work developed a novel ternary ion-conductive xerogel (PEM-Li ICXG) system based on polyethylene glycol (PEG), poly (2-methoxyethyl acrylate) (PMEA), and LiTFSI. PEM-Li ICXGs exhibit high conductivity (2.7 × 10−2S/m), high adhesive capability (0.34 MPa), and solvent-free characteristics. Remarkably, the incorporation of ions into ICXGs simultaneously optimizes their mechanical performance. We demonstrate the application of ICGs in flexible sensors for strain or temperature sensing. The proposed synthesis strategy is straightforward and may further inspire the design of novel high-performance ICXGs.
研究领域:
材料科学
·
生物电子学
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Meng Tian,Shijie Zhou,Yi Tian,Xuan Luo,Luhan Wang,Miaomiao Xu,Linlin Hu
Silicon-carbon composite material (Si/C) with high specific capacity is regarded as the most promising alternative to graphite and has been commercialized gradually. However, the practical implementation of Si/C anodes remains challenging due to electrode structure disintegration and interfacial instability induced by the substantial volume change of the internal Si-based particles. Herein, we synthesized a hydro-soluble binder with modulated mechanical properties by radical polymerization between acrylic acid (AA) as hard monomer and 2-methoxyethyl acrylate (MEA) as soft monomer simply for Si/C anodes. The as-developed binder exhibits the trade-off mechanical properties between elasticity and rigidness, excellent adhesivity and enhanced lithium-ion diffusion compared with PAA, which is conducive to accommodate the significant volume variation of Si/C during cycling and keeping the integrity of electrode structure. The Si/C anode with P(AA-co-MEA) binder manifests the improved cycling stability (502 mAh g −1 and 82.6% capacity retention rate after 500 cycles at 0.5C) and rate capability compared to that with PAA binder. This work offers valuable insights into the pursuit of high-capacity lithium-ion batteries (LIBs) with enhanced cycling stability.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124054
·
IF 7.5
Yuhan Guo,Zebiao Jiang,Yu Zheng,Bohan Xiao,Yunxia Zhao
This study evaluates the CO₂ capture performance and multiscale mechanisms of three tertiary amine–promoter blends: DEEA + PZ, DMEA + PZ, and DEEA + AMP. Spectroscopic characterization at 12 vol% CO₂ identified dominant reaction pathways, while cyclic performance was evaluated under simulated gas-fired power plant flue gas conditions (4 vol% CO₂, 95 °C regeneration). DMEA + PZ achieves a cyclic working capacity of 8.49 g CO₂/kg solvent—1.92 times that of the 30 wt% MEA benchmark—with a 48% reduction in relative regeneration energy consumption. In situ Raman and quantitative ¹H qNMR analyses show that all three systems operate predominantly via the bicarbonate pathway, with the PZ-carbamate decomposition rate considerably higher for DMEA + PZ (∼22%) than for DEEA + PZ (∼17%). AMP forms no detectable carbamate, relying exclusively on the bicarbonate pathway and exhibiting a discernible solvent volatilization trend. DFT calculations reveal that the stronger basicity of DEEA, arising from the inductive effect of its ethyl groups, yields higher absorption capacity but greater regeneration energy, whereas the narrower HOMO–LUMO gap of PZ enables rapid nucleophilic kinetics and the steric shielding of AMP precludes stable carbamate formation. Classical MD simulations show that compact PZ diffuses considerably faster than the sterically encumbered tertiary amines, while AMP-containing systems exhibit restricted diffusion; RDF analyses indicate steric shielding between the N centers of the main amine and promoter, with –OH-mediated hydrogen-bonding networks providing potential proton relay pathways. These insights offer a theoretical foundation for designing blended amine solvents for low-partial-pressure, waste-heat-driven CCUS applications.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yu Zhang,Ruobing Tian,Xueming Tang,Zengguang Ji,Jiahao Liu,Xinli Wang,Guojun Deng,Bin Miao,Yuanna Sun,Hongyang Chen,Yongxing Wang
Water-triggered dynamic reconstruction overcomes conductivity-stability trade-off in ionogels. • Hydrophobic MEA chains form a protective surface barrier while ATU retains bulk ion channels. • The ionogel achieves 8.79 mS/cm conductivity, >4-month water stability, and 85 kPa wet adhesion. • It provides rapid thermal response (−2.54%/°C, 0.1 °C, 510 ms) and quantitative smoke sensing. • Wireless and underwater capabilities enable real-time physiological monitoring and Morse code. Ionogels are promising soft ionic conductors for flexible electronics, yet their operation in wet and underwater environments remains limited by a persistent trade-off between ionic conductivity and aqueous stability. Hydrophilic networks facilitate ion transport and interfacial adhesion but are prone to swelling and ion leakage, whereas hydrophobic networks resist water ingress at the cost of reduced ion mobility and poor compatibility with wet interfaces. Here, we report a water-triggered microphase reconstruction strategy for amphiphilic ionogels that converts water from a destructive medium into an active structural trigger. The ionogel is prepared by copolymerizing hydrophilic N-allylthiourea (ATU) and hydrophobic 2-methoxyethyl acrylate (MEA) in a hydrophobic ionic liquid matrix of [BMIm][TFSI]. Upon water exposure, hydration of ATU-rich regions strengthens hydrophilic-hydrophobic phase incompatibility, driving the rearrangement of PMEA segments toward the outer interface while retaining ionic-liquid-rich domains within the reconstructed network. This adaptive architecture forms a hydrophobic anti-swelling surface layer without sacrificing internal ion-conducting pathways. As a result, the reconstructed ionogel simultaneously achieves high ionic conductivity of 8.79 mS cm −1 , long-term stability for more than 4 months in water, and wet adhesion strength up to 85 kPa. Spectroscopic analysis, surface characterization, Raman mapping, density functional theory calculations, and molecular dynamics simulations collectively reveal the coupling between water-induced phase reconstruction, polymer-ion interactions, and enhanced ion mobility. Benefiting from these integrated properties, the ionogel functions as a robust multimodal sensing platform for underwater strain monitoring, Morse-code communication, high-resolution temperature sensing, wireless physiological monitoring, and smoke detection. This work establishes water-triggered microphase reconstruction as a molecular design principle for adaptive ionogels that require stable ion transport in complex aqueous and biointerfacial environments. Water-Triggered segmental reconstruction in the amphiphilic ionogel concurrently imparts anti-swelling capability and markedly enhanced conductivity. These integrated properties facilitate its application as a multimodal sensor for underwater communication, temperature, and smoke concentration detection. Download: Download high-res image (253KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Huilin Li,Xuechong Ding,Teng Zhou
Reducing regeneration energy remains a central challenge in post-combustion CO 2 capture by chemical absorption. In this work, nine aqueous MDEA/DMEA/PZ blends were systematically screened using thermodynamic performance indicators, including the heat of absorption, heat capacity, and equilibrium CO 2 absorption capacity. Two formulations, D30P10 (30% DMEA +10% PZ) and M5D25P10 (5% MDEA +25% DMEA +10% PZ), were identified as the most promising candidates for achieving low regeneration energy. These two solvents were further evaluated against two benchmarks, 30 wt% MEA and M30P10 (30% MDEA +10% PZ), in cyclic absorption–desorption experiments. Among them, M5D25P10 delivered the best overall balance of stable cyclic performance and a cyclic capacity about 0.55 mol CO 2 /mol amine. Benefiting from its high cyclic capacity and low heat of absorption, this solvent achieved a regeneration energy of 2.98 GJ/t CO 2 , which was 21.2% and 4.5% lower than those of 30 wt% MEA and M30P10, respectively. Kinetic performance indicators, including the initial absorption rate ( r abs ini ) and the overall mass transfer coefficient ( K G ), were also evaluated, and M5D25P10 exhibited the highest mass transfer coefficient among all tested solvents. These results collectively confirm that M5D25P10 is a highly promising solvent for post-combustion CO 2 capture. Moreover, a robust empirical correlation between r abs ini and K G was established for the first time, providing a rapid and solvent-efficient means of estimating mass-transfer performance.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Kailin Han,Liangmiao Zhang,Changzheng Pan,Hao Zeng,Yibo Xue,Fang Xia
Theory-experiment closed loop enables rational design of doped NiO electrochromics. • DFT screening identifies Y as the optimal dopant over La and Ce. • Y-doped NiO exhibits 50.6 % optical modulation and fast switching kinetics. • High coloration efficiency of 215.6 cm 2 ·C⁻ 1 is achieved experimentally. • Y-doped smart windows achieve 11.3 °C cooling, proving energy savings. Doping is an effective strategy to tailor NiO for high‑performance eletrochromic applications. In this work, first‑principles calculations reveal negative formation energies for Y (−5.83 eV) and La (−3.72 eV) in NiO, confirming spontaneous and stable doping. Experimentally, Y and La doping dramatically boost the charge storage capacity of crystalline NiO films. Most notably, at 500 nm, the Y‑doped (Y‑4) and La‑doped (La‑4) films achieve outstanding optical modulations of 50.6 % and 32.0 %, respectively. They far exceed the 8.3 % of undoped NiO‑400. The doped films also exhibit much faster switching kinetics: coloration/bleaching time of 4.2/6.1 s for Y‑doped and 8.0/4.3 s for La‑doped, compared to 7.0/6.5 s for undoped NiO. More importantly, they exhibit remarkably high coloration efficiencies of 215.6 and 262.0 cm 2 ·C −1 , respectively. After 1000 cycles, the Y‑doped film retains 88.0 % of its initial charge capacity, and the La‑doped film retains 90.7 %. Model house tests indicate their good thermal insulation performance for building applications. This strategy of integrating computational design with experimental validation provides a powerful and general approach to develop tailored doped‑NiO electrochromic materials and other advanced functional materials. Y(or La)-doped NiO electrochromic materials with high electrochromic properties was designed by first‑principles calculations and synthesis successfully. Download: Download high-res image (97KB) Download: Download full-size image
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MACROMOLECULES
·
2026
·Vol. 59
·期 14
·8321-8327
·
IF 5.7
Chen Yin An,Wang Xiaoyuan,Liao Hongguang,Fang Lulin,Li Xiang,Zhu Caizhen,Fan Hailong
Protein mechanical responses are governed not only by
dynamic noncovalent
interactions but also by their local sequence organization. Inspired
by this principle, we study a hydrophobic polyelectrolyte with a statistically
enriched neighboring distribution of cationic and aromatic monomers.
In water, concentrated solutions of this polymer undergo reversible
shear-induced gelation, transforming from viscous liquids into transient
gel-like states under shear and recovering fluidity after the removal
of stress. This transition depends strongly on concentration and shear
rate, indicating a concentration-dependent entangled state that becomes
increasingly susceptible to network formation under flow. A nonaromatic
control polymer does not exhibit this behavior. In saline media, electrostatic
screening drives the system into a salt-induced associated state,
yet the reversible shear-induced transient gel-like transition persists.
The gelation transition and the dimensions of rodlike aggregates both
depend on the identity of the added alkali metal cation. Because this
ion dependence follows the known aqueous cation−π competition
trend, the results identify cation−π interactions as
the dominant sequence-specific driving force. These findings show
that statistical enrichment of neighboring cation–arene motifs
can encode protein-like force responsiveness in synthetic polymers.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jin Cai,Wan Chen,Hai Li,Xin Zheng,Han Tang,Ming-Ke Yang,Zi-Xuan Huang,Zi-Ying Zhao,Peng Xiao,Yun-Lei Peng,Xian-Ren Zhang,Long-Long Xie,Bei Liu,Chang-Yu Sun,Guang-Jin Chen
Capturing CO 2 at scales have drawn increasing attention to addressing climate change and meeting global carbon targets. However, current CO 2 capture strategies face critical tradeoffs in terms of selectivity, regeneration energy, and cost-effectiveness. Here, we present a net-like colloid that is formed by the self-assembly of simple molecules, e.g., some organic ligands of metal–organic frameworks, in water. They have reticular characteristics under cryo-scanning electron microscopy and in particular, form a skeleton/micro-pool structure. We demonstrate the thermal response of the reticular structure, which declines with elevated temperatures, brings the colloidal peculiar CO 2 absorption-desorption behaviors. Specifically, they absorb CO 2 with high capacity at lower temperatures and release high-pressure gases with thermal input at higher temperatures (with over half of regeneration efficiency under 80 °C and 5 bar), enabling a high gas capacity but a low regeneration penalty. The construction of net-like structure has achieved excellent separation performance over gases, including CH 4 and N 2 (with a maximum selectivity of 1539 and 7609, respectively). Further, our finding to create a novel thermal-responsive colloid is scalable and feasible in large-scale applications, and can expand the field of colloid science significantly.
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危险品化学品经营许可证（带存储）