ACS Catalysis
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2026
·
IF 13.6
Kaixuan Chen,Xintian Luo,Hansheng Wang,Shangzhi Xie,Huibing He,Jing Xu
Low ethylene glycol (EG) selectivity and insufficient stability in the complex multistep hydrogenation of dimethyl oxalate (DMO) have invariably stimulated a research focus of copper-based catalysts. Conventional catalyst development heavily relies on extensive trial-and-error experimentation and serendipitous discovery. In order to efficiently predict high-performance catalysts, this study constructs a machine learning (ML) model based on the K-means clustering algorithm to successfully screen out the potential Ga promoter. Experimental results demonstrate that a 0.5Ga-Cu/SiO2 catalyst achieves nearly 100% DMO conversion and 98.59% EG selectivity at a relatively low temperature (180 °C) and high weight hourly space velocity (1.5 h−1), while maintaining continuous operational stability for over 240 h. Physical characterizations reveal that Ga2O3 promotes the dispersion of copper species and reduces local electron density, thereby modulating the balance between Cu0 and Cu+ dual active sites. Moreover, density functional theory calculations indicate that the interfacial interaction between Ga2O3 and copper species enhances the substrate dissociation adsorption. This study validates the utility of ML in screening advanced copper-based catalysts for efficient DMO hydrogenation to EG and provides a valuable framework for the future catalyst design in the thermocatalytic field.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Junhao Wang,Chaoen Jin,Fan Wang,Yaping Zhu,Huimin Qi
Efficient thermal management is critical for miniaturized electronic devices. While hexagonal boron nitride (h-BN) is an ideal thermal interface material (TIM) filler, its application is hindered by exfoliation difficulties and phonon spectrum mismatch. Herein, we report a strategy for preparing functionalized boron nitride nanosheets (BNNSs) using polyethylene glycol 4000 (PEG4000)-assisted ball milling and constructing high-performance thermal silicone grease. PEG4000 undergoes a phase change during the ball milling process, which effectively reduces the normal impact forces while enhancing the interlayer shear forces, thereby achieving efficient exfoliation of h-BN to obtain nanosheets with an average thickness of 8.6 nm and facilitating mechanochemical surface grafting onto BNNSs. The thermal conductive grease prepared by compounding dimethyl silicone oil and fluorosilicone oil matrices exhibits temperature-responsive thermal conductivity: reaching 1.45 W·m −1 ·K −1 at 50°C, which is a 3.5% increase compared to that at 30°C. Mechanistic analysis reveals that the phase transition of PEG4000 and the dynamic hydrogen bond network formed with the matrix significantly reduce interfacial thermal resistance. Furthermore, at 5 wt% BNNSs loading, the grease achieves a 0.01% oil bleeding rate, demonstrating excellent long-term stability. This study provides a facile and efficient approach for preparing thermal interface materials with high thermal conductivity and reliability. Highlights PEG4000-assisted ball milling enables simultaneous h-BN exfoliation and functionalization. Phase change PEG4000 constructs dynamic hydrogen bond networks as adaptive phonon bridges. The composite exhibits temperature-responsive thermal conductivity, peaking at 1.45 W·m −1 ·K −1 . Robust interfacial anchoring achieves a 0.01% oil bleeding rate, preventing dry-out failures.
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APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Haodong Huang,Bo Chen,Zhiwei Zheng,Changyi Chen,Ruifeng Luo,Haijun Guo,Zhili Li,Xinde Chen
1,2-propanediol (1,2-PDO) and ethylene glycol (EG), as key precursors for high-value fine chemicals, represent one of the core challenges in green chemical engineering through the development of biomass-directed conversion systems. This study constructed a bifunctional x%NiO@Hβ-1%Pd hierarchical porous catalyst through an interfacial engineering strategy: utilizing the confinement effect of two-dimensional mesoporous nickel silicate nanosheets to load Ni onto Hβ zeolite, and anchored highly dispersed Pd nanoparticles on the NiO@Hβ surface through NaBH 4 -induced in situ reduction, systematically investigated the structure-activity relationship of this catalyst for sorbitol hydrogenolysis in Ca(OH) 2 alkaline aqueous systems. Combined NH 3 -TPD and N 2 adsorption-desorption characterization revealed that, the introduction of Hβ zeolite significantly modulated the catalyst acidity and pore structure—the total acid amount of 25%NiO@Hβ-1%Pd reached 4.13 mmol/g (representing a 104% enhancement compared to the support-free system), the desorption peak at 550°C corresponds to strong Lewis acid sites formed by Ni-O-Si bonds, the pore system with 69% mesopore content (BET specific surface area of 541.6 m 2 /g) provides efficient transport pathways for reactant diffusion. Mechanistic studies revealed that, the Brønsted acid sites of Hβ selectively adsorb sorbitol C-O bonds through hydrogen bonding interactions, while spillover hydrogen species at the Pd-Ni interface synergistically induce selective C-C bond cleavage in cooperation with strong Lewis acid sites, ultimately achieved a total diol carbon yield of 80.3 C% for 1,2-PDO/EG under conditions of 220°C and 3 MPa H 2 . This work provides new insights into the “acid-metal-mass transfer” ternary synergistic mechanism for precise hydrogenolysis of biomass polyols.
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高影响因子
SENSORS
·
2018
·Vol. 18
·期 9
·3113
·
IF 2.475
Zitao Liu,Tuoyu Yang,Ying Dong,Xiaohao Wang
Sensitive detection of volatile organic compounds (VOCs) is significant for environmental monitoring and medical applications. In this work, multi-walled carbon nanotubes (MWCNTs) and polyethylene glycol (PEG) that have good adsorption for VOCs, were sprayed layer by layer on an interdigitated electrode (IDE) to build a sensitive VOCs gas sensor. The relative resistance change (△R/R) when the sensor was exposed to VOCs was measured. The sensor showed high sensitivity to acetone, ethanol, isopropanol and isoprene with fast response (110 ± 5 s) and recovery (152 ± 5 s) at room temperature, and the lower detection limit (LDL) of the sensor reached 9 ppm. With the micro-fabricated IDE structure, the sensor can be easily built into an electric nose for VOC recognition and measurement.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2015
·Vol. 17
·期 38
·25525-25535
·
IF 4.493
Yuanyuan Zhou,Hui Tang,Peiyi Wu
Thermo-dynamic volume phase transition mechanisms of poly[oligo(ethylene glycol)methacrylate] (POEGMA) based microgels with poly(ionic liquid) (PIL) cross-linking moieties are investigated in detail on the basis of temperature-dependent Fourier transform infrared (FTIR) spectroscopy. The original FTIR data are further analysed by two-dimensional correlation spectroscopy (2Dcos) with the perturbation correlation moving window (PCMW) technique. It is observed that the content of hydrophilic PIL cross-linking structure strongly affects the temperature induced volume phase transition mechanism of microgels in which the less cross-linked microgel exhibits a sharp volume phase transition process while the highly cross-linked microgel presents a broad transition behavior. Peculiarly, the dehydration of C–H groups acts as the driving force for the whole phase transition process within the less cross-linked microgel network and cooperative response of chemical groups is identified. It is deduced that the hydrophilic PIL moieties develop polymer–water–polymer interactions with CO groups as CO⋯D2O–PIL hydrogen bonds emerge in the less cross-linked system. As regards the highly cross-linked microgel system, the phase transition process is driven by the disruption of hydrogen bonds between CO groups and water molecules while the response of C–H groups becomes insensitive. PIL moieties passively dehydrate following the dehydration of C–H groups on oligo(ethylene glycol) side chains and no hydrogen bond between CO group and IL–D2O association appears during the phase transition process.
研究领域:
高分子科学
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软物质物理
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生物材料
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药物递送
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智能响应材料
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FUEL
·
2026
·
IF 7.5
Haosen Chen,Ding Huan,Siwei Guo,Ruiqi Guo,Deyong Wang,Dong Hou,Xiangling Li,Huihua Wang
Sn- and Mo-containing high-entropy alloys (HEAs) have recently emerged as promising hydrogen evolution reaction (HER) electrocatalysts owing to their unique inherent activity. The conventional synthesis of these alloys, however, relies on energy- and time-intensive melt-dealloying routes, significantly hindering the scale-up application. Herein, we report a facile strategy to electrodeposit the CoFeNiMoSn HEAs with tunable Sn contents and regulated microstructures in a choline chloride—ethylene glycol-based (CE-based) electrolyte, which allow for tailoring the intrinsic electronic structures and maximizing the exposure of active sites. The CoFeNiMoSn-6 HEA with the highest Sn solubility exhibits an outstanding HER activity in 1 M KOH by delivering a current density of 10 mAcm −2 at only 66 mV, a Tafel slope of 44.2 mVdec -1 , an interfacial charge-transfer resistance ( R ct ) of 0.42 Ω cm −2 , and a large electrochemical surface area ( C dl = 49.83 mF cm −2 ). Despite its modest OER activity, the symmetric CoFeNiMoSn-6 || CoFeNiMoSn-6 couple drives the overall water splitting at 1.58 V to reach 20 mA cm −2 , lower than the benchmark noble-metal couple (20 wt% Pt-C/NF || RuO 2 /NF, 164 V) under the same current density. This work demonstrates the feasibility for fabricating Sn and Mo co-existing HEAs by a facile electrodeposition route in a CE-based electrolyte, and it could be potentially extended to other group elements that are incompatible in aqueous media, thus paving a scalable route toward low-cost and high-performance HEA electrodes for industrial hydrogen production.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Zhiling Huang,Xiaoge Peng,Di Liu,Yue Meng
This study focuses on the promising electrochromic material tungsten oxide. A WO 3 ·0.33H 2 O film with a controllable microstructure was successfully synthesized using a surfactant-assisted hydrothermal method. Compared with the WO 3 -SDS films regulated by the ionic surfactant sodium dodecyl sulfate (SDS) and the pure-phase WO 3 ·0.33H 2 O films (Marked as WO 3 films), this study used non-ionic polyethylene glycol (PEG) as a structure-directing agent to successfully fabricate high-crystallinity WO 3 -PEG films with preferred (220) crystal plane orientation. Scanning electron microscopy (SEM) analysis shows that the film exhibits uniform particle morphology, with tightly packed particles forming interparticle channels, creating layered ion diffusion paths. Electrochemical tests showed that the WO 3 -PEG film exhibited excellent electrochromic performance: the Li + diffusion coefficient (5.094 × 10 −13 cm 2 /s) was significantly improved, 1.71 times higher than that of pure WO 3 (2.971 × 10 −13 cm 2 /s). The response time was fast ((t c /t b = 4.73 s/4.57 s), and the optical modulation amplitude was high (ΔT of 61.50% at 600 nm wavelength). By optimizing the synergistic effect of crystallinity and engineered ion channel structure, synchronous electron transfer and ion insertion are achieved, providing a new approach for the design of high-performance electrochromic materials.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2023
·Vol. 53
·期 12
·2397-2410
·
IF 2.9
He Xinkuai,Guo Ruqing,Hu Zhousi,Zou Qingtian,Yang Jingjing,Wu Luye
The co-deposition behavior of Co(II) and Mo(VI) and Co–Mo electro-crystallization mechanism in ethylene glycol (EG) are recorded using cyclic voltammetry and chronoamperometry. These results indicate that the Co–Mo co-deposition is representative induced deposition; Co(II) species can facilitate Co–Mo co-deposition, inversely, Mo(VI) species can inhibit Co(II) reduction and the effect can be enhanced as Mo(VI) concentration increases. Additionally, Co–Mo co-deposition in EG takes place through an instantaneous nucleation and diffusion-controlled three-dimensional growth mechanism. Co–Mo deposits with various Mo contents and different microstructures can be obtained from the EG solution. SEM micrographs present that the Co–Mo deposits with 1.56 wt% Mo present a pure pompon microstructure. Benefiting from the composition engineering by alloying with Mo, as well as the simultaneous presence of a suitable pompon structure, Co–Mo deposits with 1.56 wt% exhibits prominent electrocatalytic durability and activity with a η 10 of 84 mV for HER in a 1.0 M KOH. Graphical abstract
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MOLECULES
·
2023
·Vol. 28
·期 8
·3464
·
IF 4.6
Ke Wang,Chuan Liu,Wenxi Xie,Yihan Ke,Xiaoyong You,Binghao Jing,Yongqian Shi
With the depletion of fossil fuel energy and both the slow development and low utilization rate of new eco-friendly energy, finding new ways to efficiently store energy has become a research hotspot. Presently, polyethylene glycol (PEG) is an excellent heat storage material, but it is a typical solid-liquid phase change material (PCM) with a risk of leakage during phase transition. A combination of wood flour (WF) and PEG can effectively eliminate the risk of leakage after the melting of PEG. However, WF and PEG are both flammable materials, which impedes their application. Therefore, it is of great significance to expand their application by forming composites from among PEG, supporting mediums, and flame-retardant additives. This will improve both their flame retardancy and phase change energy storage performance, and will also lead to the preparation of excellent flame-retardant phase change composite materials with solid-solid phase change characteristics. To address this issue, ammonium polyphosphate (APP), organic modified montmorillonite (OMMT), and WF were blended into PEG in specific proportions to prepare a series of PEG/WF-based composites. Both thermal cycling tests and thermogravimetric analysis results demonstrated that the as-prepared composites had good thermal reliability and chemical stability. In addition, during differential scanning calorimetry tests, the PEG/WF/[email protected]composite presented the highest melting latent heat (176.6 J/g), and its enthalpy efficiency reached more than 98.3%. The PEG/WF/[email protected]composite also exhibited superior thermal insulation performance when compared to the pure PEG/WF composite. Furthermore, the PEG/WF/[email protected]composite exhibited a significant 50% reduction in peak heat release rate as a result of the synergistic effect between OMMT and APP in the gas and condensed phases. This work offers a useful strategy for the fabrication of multifunctional phase-change material, which is expected to broaden its industrial applications.
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PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Wangwang Tao,Jun Wang,Yu Zhou,Zhaoxia Liu,Hongxiang Chen,Zuyi Zhao,Hongye Yan,Xinghua Liao
In order to not only improve the stability of nanomicelles in blood circulation but also promote the cellular uptake in tumors and rapidly release the encapsulated drugs in tumor cells, a kind of acid/reduction dual-sensitive amphiphilic graft polyurethane with folic acid and detachable poly(ethylene glycol) (FA-PUSS- g imi -mPEG) was synthesized by grafting folic acid and monomethoxy poly(ethylene glycol) to the polyurethane side chain. FA-PUSS- g imi -mPEG could self-assemble in aqueous solution to form negatively charged nanomicelles, which endowed them good stability under normal physiological condition. Using ultraviolet-visible spectrometer (UV–vis) and dynamic light scattering (DLS), it was found that the hydrophilic poly(ethylene glycol) layer of FA-PUSS- g imi -mPEG micelles could be detached due to the cleavage of benzoic-imine bond under slightly acidic condition, which resulted in reversing the charge of the micellar surface and exposing folic acid to the micellar surface. FA-PUSS- g imi -mPEG micelles could load doxorubicin (DOX), moreover the drug release rate was faster at pH 5.0 and 10 mM glutathione (GSH) than that under normal physiological condition. The results of cell experiments further demonstrated that FA-PUSS- g imi -mPEG micelles had acid/reduction dual-sensitive property. The changes in the structure of FA-PUSS- g imi -mPEG micelles could enhance the cellular uptake under acid condition and the micelles could accelerate the drug release in tumor cells due to the presence of disulfide bonds in the polymer. Therefore, FA-PUSS- g imi -mPEG micelles could efficiently deliver anticancer drug into tumor cells and enhance the inhibition of cellular proliferation through multi-effect synergy.
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PubMed
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2022
·
IF 5.062
Wan Liu,Meng Cheng,Fangying Yuan,Jiaying He,Yulin Feng,Yi Jin,Jianfang Feng,Shilin Yang,Liangxing Tu
Nanocrystal technology is a common strategy to enhance the oral bioavailability of poorly-soluble drugs, and how to enlarge the enhancing ability on oral absorption via nanocrystals has become a pharmaceutical research field. In this study, we selected andrographolide (ADR), a typical poorly-soluble drug, as the model drug, and employed sodium dodecyl sulfate and D-ɑ-Tocopherol polyethylene glycol 1000 succinate copolymer (SDS-TPGS) to construct novel SDS-TPGS modified andrographolide nanocrystals (S-TANs). We found that the particle sizes of SDS/TPGS physical mixture modified nanocrystals (STANs) were about 553.4 ± 4.1 nm , while that of SDS-TPGS modified nanocrystals (S-TANs) were 604.6 ± 5.7 nm. During the production process of nanocrystals, the crystallinity of ADR was slightly decreased. Nanocrystals enhanced the saturation solubility of ADR, and improved oral absorption, C max and AUC 0-∞ of S-TANs was about 2.10 and 1.24 fold increased, STAN about 2.63, 2.97 fold. In a Real-time distribution study, we found the distribution time of andrographolide, SDS and TPGS in SDS/TPGS physical mixture modified nanocrystals system varies widely, while the distribution times of these materials were similar in SDS-TPGS copolymer modified nanocrystals system. These results indicated that modified with functional stabilizer was an efficient strategy to enlarge the enhancing ability on oral absorption of nanocrystals, and synthesized copolymer containing different functional stabilizers showed higher ability on enhancing oral bioavailability than physical mixtures.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Cunshi Wang,Gongkui Xiao,Xiaobin Zhou,Qiuzi Zhu,Yuanyi Chen,Zhimin Gao,Chao Liu,Jianzhong Zhu
Liquid-solid phase change absorption has been considered a promising strategy for CO 2 capture. To achieve efficient and economic CO 2 capture in industrial-scale applications, it is essential to understand the phase-change behaviors and mechanisms of the biphasic system. In this study, a blend of 1, 4-Butanediamine (BDA) and ethylene glycol (EG) was developed as a biphasic solvent that can form a high CO 2 loading solid phase product (BESP) after absorption. The total solvent loading reached 0.9039 mol·mol −1 , with 90.74% of the loading enriched in the solid phase, which only accounts for 51.01% of the total solvent mass. Based on the 13 C NMR analysis and quantum chemical calculations, the reaction and phase change mechanism of CO 2 capture was proposed. The BDA/EG system absorbs CO 2 to generate carbamate species, protonated amines and alkyl-carbonates, which combine each other through hydrogen bonding or electrostatic attraction. The self-aggregation of zwitterions and the high polarity of the absorption products are considered to be the main reasons for the phase change. Alkyl-carbonate species are believed to co-precipitate through organic gelation via van der Waals force with the carbamate or protonated amine. Moreover, the viscosity, turbidity, solid-phase mass, and particle size distribution changes also demonstrate the growth and aggregation of particles during absorption. BESP, identified as a coupling product of carbamate and alkyl-carbonate ( [2BDAH + COO - ] · [EG‐OCO 2 - ] ), decomposes at a peak temperature of 127.4 °C. The calorimetric method determined regeneration heat to be approximately 3.17 GJ·ton -1 CO 2 , indicating its potential for alternative uses rather than direct heat regeneration. Such a biphasic solvent may provide unique solutions for industries to reduce CO 2 emissions.
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