MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Weina Shi,Yanqing Zhu,Cong Shen,Jifu Shi,Gang Xu,Xiudi Xiao,Runqiang Cao
Thermochemical heat storage based on inorganic salt hydrates is a promising approach to relieve the heat energy supply and demand conflicts, but there exist lots of defects of pure salts when applied to the thermochemical. This paper attempted to use functionalized Metal-Organic Frameworks (MOFs) as the porous matrices to improve the heat storage performance of inorganic salt hydrates. A series of MOFs/CaCl 2 composites based on MIL-101(Cr)-X (X = -NH 2 , –SO 3 H, H, –CH 3 , –F) were successfully synthesized and fully characterized by combining multiple techniques (i.e. powder X-ray diffraction, scanning electron microscopy , energy-dispersive X-ray analysis, N 2 adsorption-desorption, Fourier transform infrared spectroscopy , thermogravimetric and differential scanning calorimetry). The water sorption properties of the series of MOFs/CaCl 2 composites were studied during the hydration process, and a continuous adsorption/desorption experiment was also performed to investigate the cycle stability of the MOFs/CaCl 2 composites. The results show that the hydrophilic MOFs based composites have higher water sorption capacity (0.6 g(H 2 O)/g(sample) for MIL-101(Cr)–SO 3 H/CaCl 2 ) accompanied with higher heat storage density (1274 J/g for MIL-101(Cr)–SO 3 H/CaCl 2 ). Moreover, the series of MOFs all presented excellent cycle performance with little loss after continuous 17 adsorption/desorption cycles.
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高影响因子
MATERIALS AND STRUCTURES
·
2026
·Vol. 59
·期 6
·303
·
IF 3.9
Yin Jianhao,Liao Jiaxin,Kong Xiangming
The composition, moisture distribution, and microstructural evolutions of calcium-silicate-hydrate (C–S–H) in synthetic C–S–H (SynCSH) and hardened tricalcium silicate paste (HC 3 SP) during the first drying-resaturation (D-R) cycle were systematically compared using low-field 1 H-nuclear magnetic resonance (LF-NMR) and thermogravimetric analysis (TGA). The stoichiometric formulas of C–S–H in SynCSH and HC 3 SP were determined as C 0.9 SH 3.65 and C 2.0 SH 4.53 , respectively. Water contents of C–S–H quantified by TGA and LF-NMR exhibit good linear relationship. Three types of water, interlayer water, gel water and capillary water in C–S–H were identified by LF-NMR. Notable observations included the abnormal increase of interlayer water during the drying process and subsequent decrease during resaturation, along with irreversible decreases in capillary water and increases in gel water after D-R cycle, which were attributed to the rearrangement of C–S–H layered structures. SynCSH exhibited collapse of capillary pore structures following the D-R cycle, resulting in irreversible reductions in total water content. This finding confirms the validity of synthetic C–S–H as a model material for cementitious C–S–H research while highlighting its limitations in predicting the microstructural stability of real cement pastes under moisture cycling.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Youheng Yao,Gaoxu Han,Yixuan Yao,Chuanjin Wang,Junshu Wu,Wenyuan Zhou,Yongli Li,Jinshu Wang
A TiCl 3 -based route enables H insertion and dispersed Ti sites on WO 3 photoanode. • Dispersed Ti sites favor secondary-hydroxyl activation and DHA formation. • H insertion suppresses free •OH species and mitigates DHA overoxidation. • (H,Ti)/WO 3 achieves 71.9% DHA selectivity and 264.5 mmol m −2 h −1 productivity. Selective photoelectrochemical oxidation of glycerol to dihydroxyacetone (DHA) offers a compelling strategy for integrating solar energy conversion with biomass valorization. However, efficient DHA accumulation remains challenging because two key issues are often underemphasized: the atomic level control of glycerol adsorption geometry for secondary-hydroxyl oxidation, and the suppression of radical mediated overoxidation of the formed DHA. Herein, we report a H, Ti-dual-modified WO 3 photoanode (H,Ti)/WO 3 that enables highly selective glycerol oxidation to DHA via cooperative interfacial pathway regulation. The (H,Ti)/WO 3 photoanode achieves a DHA selectivity of 71.9%—a sharp rise from 35.7% for WO 3 , and a DHA production rate of 264.5 mmol m −2 h −1 , roughly 5 times that of the unmodified counterpart. Mechanistically, highly dispersed Ti sites enhance adsorption of the secondary hydroxyl group of glycerol, directing the pathway toward DHA via two‑electron transfer. H‑insertion, in contrast, shifting hydroxyl chemistry away from free •OH mediated deep oxidation toward more surface-bound hydroxyl species and thereby suppressing DHA overoxidation. With this dual-pronged strategy, our work provides new insights into the selective formation and stable accumulation of DHA in biomass photoelectrochemical systems. Download: Download high-res image (146KB) Download: Download full-size image
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POLYMER
·
2026
·
IF 5.1
Shuai Huang,Ziqiang Xiang,Yuhao Zhu,Renfeng Gong,Yicheng Wang,Ruoyi Liu,Guanjun Liu,Qingshan Wu
The rapid evolution of high-power flexible electronics necessitates materials that concurrently enable efficient heat dissipation and high-precision thermal monitoring. Conventional ionogels suffer from intrinsically low thermal conductivity, which induces severe thermal hysteresis, fundamentally compromising their accuracy in dynamic thermal detection. Herein, rather than treating copolymer regulation or h-BN filling as isolated design elements, we propose a thermally coupled ionogel design aimed at reconciling two usually conflicting requirements: rapid heat equilibration and high thermoresistive sensitivity. P(DMAA-co-AAM)/h-BN composite ionogels are fabricated via in-situ UV-initiated free-radical polymerization, in which N,N-dimethylacrylamide (DMAA) and acrylamide (AAM) form a mechanically compliant and ion-transportable copolymer network, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) provides thermally activated ionic pathways, and hexagonal boron nitride (h-BN) nanosheets introduce filler-assisted thermal transport pathways. Systematic optimization reveals that a DMAA-to-AAM mass ratio of 3:1 with 20 wt% h-BN yields the optimal synergy among mechanical flexibility, thermal transport, and ionic conduction. The resulting composite achieves a thermal conductivity of 0.469 W/(m·K), representing a ∼160% enhancement over the pristine matrix, which effectively suppresses heat accumulation. Concurrently, the ionogel exhibits an ultra-high temperature coefficient of resistance (TCR) of −13.5%/°C and a thermosensitive coefficient (B value) of 3879 K within 0-20°C. Benefiting from the enhanced thermal transport performance, the dynamic thermal response speed of this series of ionogel sensors (30°C → 35°C) is significantly accelerated with the increase of h-BN loading: the T90 response time of the 10 wt%, 20 wt%, and 30 wt% h-BN samples is 32.40 s, 24.34 s, and 15.14 s respectively. Meanwhile, the devices can still maintain stable and reversible resistance switching characteristics over 50 heating-cooling cycles. This study achieves the synergistic enhancement of the thermal management and temperature sensing performance of the ionogel, providing an ideal material platform for the next-generation wearable electronic devices and intelligent thermal management systems.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Jian Ma,Jinfeng Sun,Liang Tian,Xiaoyu Bai,Zhuqing Yu
The recycling of waste cathode ray tube (CRT) glass in cement-based materials is hindered by its low early age reactivity which limits mechanical performance and large-scale utilization. This study presents a novel strategy to overcome this limitation by incorporating C-S-H seedings into waste CRT glass-Portland cement (PC) systems. Through a multi scale investigation encompassing workability compressive strength hydration kinetics phase assemblage and pore structure we demonstrate that C-S-H seedings act as both nucleation sites and physical fillers significantly accelerating early age hydration and promoting later pozzolanic reactions. An optimal seeding content of 1.5 wt enhanced 1 d compressive strength by 50.0% compared to the control and even surpassed pure PC by 40.5%. Notably total porosity was reduced by up to 63.2% at 1 d and the critical pore diameter was substantially refined. These improvements are attributed to a dual stage mechanism involving early age nucleation seeding and pore filling followed by enhanced pozzolanic reaction of waste glass at later ages. This work provides a scalable and effective approach for valorizing waste CRT glass in sustainable cementitious materials with a carbon emission reduction of 11.17% compared to conventional PC. The findings also highlight the need for future research on long term durability and life cycle assessment to support practical deployment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shaoxia Guo,Mengting Li,Liang Gao,Yongrui Wang,Cheng Gu,Longxiao Yang,Yuping Huang,Enhui Xing,Yibin Luo,Xinbin Ma,Xingtian Shu
A series of heterogeneous Pd-catalysts was prepared via a facile new method. • Use of zeolite on EMC in C 2 mixture greatly reduced the corrosiveness of system. • The H-Beta zeolite catalyst with SiO 2 /Al 2 O 3 ratio of 22 showed superior performance. • The cooperation of H-Beta and trace MSA in presence of H 2 O boosted C 2 H 4 conversion. • A possible reaction mechanism was proposed for heterogeneous Pd-based system. Ethylene methoxycarbonylation (EMC) is highly efficient route for converting ethylene to methyl propionate (MP) with 100% atom economy, which has been commercialized over homogeneous Pd-based catalyst in pure ethylene. However, concerns about severe corrosiveness of strong liquid acids have always existed. Herein, H-Beta zeolite for the first time was introduced to cooperate with trace methanesulfonic acid (MSA) in the presence of water, to catalyze EMC in C 2 mixture. Over WMB-22 catalyst (containing H-Beta zeolite with SiO 2 /Al 2 O 3 ratio of 22, 0.32 wt% H 2 O, 0.005 wt% MSA, palladium/1,2-bis(di- tert -butylphosphinomethyl) benzene (d t bpx) complex with Pd/d t bpx/MSA ratio of 1/2/0.5), a superior ethylene conversion of 97.9% and 100% product selectivity, were obtained with C 2 H 6 /C 2 H 4 /CO feeding ratio of 1/2/2. A good linear correlation between C 2 H 4 conversions and the total acid content of H-Beta zeolite and MSA revealed that the synergistic effect between H-Beta zeolite and MSA could enhance C 2 H 4 conversion. Compared with the homogeneous catalyst with Pd/d t bpx/MSA of 1/2/15, under similar C 2 H 4 conversion conditions, the MSA amount of heterogeneous system was 1/30 of homogeneous system, indicating the addition of zeolite could greatly reduce the corrosiveness of system. 31 P nuclear magnetic resonance (NMR) results indicated that the introduction of zeolite, water and MSA could promote the generation and stabilization of active species. 1 H magic angle spinning (MAS) NMR and isotope D-tracing experiments clarified the interaction among Brønsted acid of zeolite, water and methanol, confirming the proposed mechanism pathways. This work provides a facile new method for using H-Beta zeolite and MSA as potential high-performance acid promoters for EMC. Download: Download high-res image (136KB) Download: Download full-size image
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Guan Yanfang,Zhang Qingyuan,Su Jiajun,Jian Yuhang,Wei Xinxin,Yang Xinlun,Zheying Wang,Yang Jinchu,Zhou Bei,Li Limin,Wang Jingxin,Yue Longwang,Shi Yingli
Flexible PEDOT:S-H/CNF paper biosensor enables noninvasive sweat glucose monitoring for wearable use. • 0.2:0.6 EDOT:S-Na₂S₂O₈ ratio yielded 17.08 S/cm conductivity, low swelling, and superior performance. • 3.ENS strategy enabled stable GOx covalent binding, enhancing activity and ensuring long-term stability. • 4.Optimized IDE geometry enhanced charge transfer, boosting sensitivity and lowering resistance. • 5.<5% glucose error in sweat across varied conditions enables real-time clinical monitoring. Biosensors enable disease, environmental, and metabolite monitoring due to high sensitivity, rapid response, and biocompatibility. However, wearable formats suffer from limited flexibility, inefficient enzyme immobilization, and poor wearability. Here, we present a wearable, stable, fast-responding sweat glucose (SG) biosensor using paper-based interdigitated electrodes (PIDE) coated with PEDOT:S-H/cellulose nanofiber (PSH/CNF,PCN) and covalently immobilized glucose oxidase (GOD). The composite exhibits high conductivity (17.08 S/cm), low swelling, and robustness; PSH is synthesized from EDOT:S and Na₂S₂O₈ (0.2:0.6) and mixed with CNF at 1:16 (v/v). The optimized PIDE geometry (1 mm spacing, 0.5 mm width, 10 mm length, 6 pairs) reduces interfacial impedance (180 Ω) and improves sensitivity (0.042 mA/mM). A one-sided GOD immobilization via 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide/succinic acid (EDC/NHS/SA, ENS) coupling yields ~2% enzyme leaching. The sensor shows a fast response (1.172 s) and peak current (0.1154 mA). Robust performance persists across pH 4–10, 36–39 °C, 3–5 mg/mL NaCl, and 30–70% RH. An SG concentration–impedance model (0.064–4.102 mmol/L) is established. Predicted SG trends deviate by <5% from blood glucose across five physiological states. The PIDE design enables better flexibility, integration and stability than conventional three-electrode sensors. This PIDE biosensor enables sensitive, stable noninvasive SG monitoring. Download: Download high-res image (167KB) Download: Download full-size image
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Renfei Xu,Xiangjun Li,Miaomiao Li,Yinxia Dong,Libo Tong
Despite the outstanding lightweight potential of Mg alloys, their poor corrosion resistance significantly limits their practical applications in engineering. As a more sustainable alternative to solvent-based resins, waterborne polyurethane (WPU) coatings offer notable environmental and safety benefits, including low VOC emissions, non-flammability, and ease of application. However, the inherent microporous defects formed during the curing process, coupled with the absence of self-healing capabilities, notably undermine their protective performance. In this study, a smart hybrid coating was developed to improve the corrosion protection of WPU on Mg alloys. The coating combines benzotriazole (BTA)-loaded mesoporous polydopamine (mPDA) microspheres and hydroxylated boron nitride (OH-BN) within the WPU matrix, achieving active-passive synergistic protection through dual pH/light responsiveness. The mPDA enhances OH-BN dispersion within the matrix and simultaneously acts as an intelligent carrier for the controlled release of BTA under acidic or light-irradiated conditions. Electrochemical impedance spectroscopy (EIS) showed that, after 6 h of immersion in NaCl solution (pH = 3), the damaged composite coating retained an impedance modulus of 2.37 × 10 5 Ω·cm 2 at 0.1 Hz, and maintained a value of 1.97 × 10 5 Ω·cm 2 under light irradiation-28 and 2.8 times higher, respectively, than pure WPU. These results confirm the coating's outstanding corrosion resistance and stimulus-responsive self-healing capability, which arise from the synergistic effects of the OH-BN barrier and BTA release under pH and light stimuli. This work presents a sustainable and intelligent corrosion protection strategy for Mg alloys in harsh environments.
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
Qing Cheng,Yuqi Zhang,Yingying Cao,Long Liu,Yanqiang Zhang
The novel ionic liquid-H2O2 propellants are urgently to solve the intrinsic ignition problem for achieving the aerospace applications. We addressed this issue by tuning the d-band center to adjust the catalyst's adsorption strength for IL/H2O2 toward the optimal value, thus enhancing catalytic activities for the efficient decomposition of H2O2 to generate reactive oxygen species. Herein, the regulation of the d-band center of Cu(I) in Cu(I)-MOF catalyst by precise ligand engineering design was studied. Remarkably, The Cu-S3 coordination of Cu-SH' shifts its d-band center closer to the Fermi level, promoting the adsorption of [BMIM]N(CN)2 and H2O2. Cu-SH' enables efficient H2O2 activation and robust •OH and 1 O2 generation to trigger the rapid self-ignition of [BMIM]N(CN)2-H2O2 propellant. The resulted tid as low as 18.4 ms is nearly 34% lower than that of homogeneous catalyst [FcCH2N(CH3)3]2[Cu2I4]. This work provides fundamental insights into the design of efficient ligand-based combustion catalysts for the higher performance of rockets and spacecrafts.
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Materials Today Chemistry
·
2022
·
IF 7.613
W. Sun,B. Shi,Z. Xia,C. Lü
Organic room-temperature phosphorescence (RTP) materials are very attractive, but there is still a challenge to achieve RTP for their practical applications under visible light excitation (λ > 400 nm) because of the implement for the most organic RTP is under ultraviolet light. Herein, a simple tactics for inhibiting the vibrational dissipation of three amorphous phenanthroline derivatives by doping them into polyvinyl alcohol (PVA) matrix was utilized to afford visible-light excitation RTP. By using this method, on account of the mutual H-bonding and confinement effect with PVA matrix, a series of organic RTP materials with blue-green phosphorescence emission were obtained under visible-light excitation. The afterglow colors of RTP materials can be adjusted by co-doping the available fluorescence dyes (RhB or Rh6G) into the PVA films through a triplet-to-singlet Förster resonance energy transfer. However, the H-bonding is easily broken by water molecules resulting in the RTP phenomenon disappears. Hence, Aphen-epoxy resin composite system was constructed to overcome this drawback. It is shown that the composite still has good phosphorescence properties after soaking in water for 7 days. The superior RTP of the amorphous phenanthroline derivatives in processable polymer matrices endows these materials with a highly potential for the night warning clothing coating and information encryption.
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Reaction Chemistry & Engineering
·
2021
·Vol. 6
·期 10
·1900-1910
·
IF 4.239
Udayakumar Veerabagu,Gowsika Jaikumar,Fushen Lu,Franck Quero
Copper iodide (CuI) nanoparticles/boron nitride nanosheets (BNNSs) were prepared via an ultrasonication method and subsequently characterized. For the first time, these newly synthesized CuI/BNNS supports were used as heterogeneous catalysts for C–H difluoromethylation reactions, including the synthesis of heteroarenes and terminal alkynes. The versatility of the catalyst was demonstrated for the synthesis of diverse substituted difluoromethylated heteroarenes and terminal alkynes from electron-deficient and electron-rich groups, resulting in moderate to high yields (up to 91%). The reaction was carried out in a greener medium (cyrene instead of dimethylformamide and N-methyl-2-pyrrolidone) at room temperature using (difluoromethyl)trimethylsilane and 9,10-phenanthraquinone in the presence of the CuI/BNNS catalyst containing ∼3 wt% Cu and I. Notably, its activity was found to provide higher yield, shorter reaction time, and fewer usage of the catalyst, compared with commercial CuI catalysts. In addition, the CuI/BNNS catalyst could be easily recovered and recycled up to five times, with only a slight decrease (3%) in its catalytic activity, providing attractive features for chemical engineers to use this catalyst for the large-industrial scale synthesis of organic bioactive compounds involving C–H difluoromethylation reactions.
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Frontiers in Neurology
·
2019
·
IF 2.635
Zhang Jie,Jiang Yunyao,Liu Nan,Shen Ting,Jung Hyo Won,Liu Jianxun,Yan Bing Chun
Senkyunolide-H (SEH), a major bioactive compound extracted from Ligusticum chuanxiong, has been reported to be effective in preventing cerebral ischemic stroke (CIS). In this study, we employed network pharmacology to reveal potential mechanism of SEH against CIS on a system level and confirmed the therapeutic effects of SEH on CIS by models of cerebral ischemia-reperfusion in vivo and in vitro. Through protein-protein interaction networks construction of SEH- and CIS-related targets, a total of 62 key targets were obtained by screening topological indices and analyzed for Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment. Gene Ontology analysis indicated that SEH might have a role in treating CIS via regulating some biological processes including regulation of transcription from RNA polymerase II promoter, epidermal growth factor receptor signaling pathway, phosphatidylinositol-mediated signaling, and some molecular function, such as transcription factor and protein phosphatase binding and nitric oxide synthase regulator activity. Meanwhile, the Kyoto Encyclopedia of Genes and Genomes analysis showed that phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway was significantly enriched. In addition, our result showed that SEH posttreatment significantly decreased the neurological scores, infarct volume, and neuronal death in the middle cerebral artery occlusion mice. Moreover, the PI3K/Akt/nuclear factor kappa B signaling pathway was activated by intragastric administration of 40 mg/kg SEH, as verified by Western blot. In vitro, treatment of PC12 cells with 100 μM SEH markedly reduced cell death induced by oxygen-glucose deprivation through the activation of PI3K/Akt/nuclear factor kappa B pathway, and the therapeutic effect of SEH was obviously inhibited by 10 μM LY294002. In summary, these results suggested that SEH carries a therapeutic potential in CIS involving multiple targets and pathways, and the most crucial mechanism might be through the activation of PI3K/Akt/nuclear factor kappa B (NF-κB) signaling pathway to inhibit inflammatory factor releases and increase the antiapoptosis capacity. Our study furnishes the future traditional Chinese medicine research with a network pharmacology framework.
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高影响因子
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