SENSORS AND ACTUATORS A-PHYSICAL
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2026
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IF 5.1
Changyi Guo,Jinyong Hu,Yong Zhang
A bottom-gate-modulated carbon-based FET is developed for room-temperature H 2 S detection. • Complete recovery is achieved by purely electrical activation without external assistance. • The sensor shows favorable selectivity and stability for miniaturized, integrated sensing applications. Increasing attention has been paid to the detection of hazardous gases under room-temperature operating conditions. To address this, this work proposes a novel strategy based on a bottom-gate modulated carbon-based field-effect transistor (FET) for efficient room-temperature H₂S sensing. The FET-type gas sensor was constructed by integrating ZnWO₄/WO₃ composites with the carbon nanotube channel. It was found that applying a −1.5 V bottom-gate bias effectively modulates the surface electronic states of the sensing material, leading to significantly enhanced device performance: a response time of 28 s and a recovery time of 92 s toward 10 ppm H₂S at room temperature, enabling both rapid response and complete recovery. Furthermore, the sensor exhibits a favorable concentration-dependent response within 1–10 ppm, while maintaining high selectivity, consistent reproducibility, and durable long-term stability (maximum response fluctuation <7.1% over 15 days). The performance enhancement is primarily attributed to the gate-bias-facilitated regeneration of adsorbed oxygen species on the material surface. This work not only provides an innovative approach for room-temperature, low-power H₂S detection but also offers a new pathway toward the development of miniaturized and integratable gas sensors. Download: Download high-res image (227KB) Download: Download full-size image
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INTERNATIONAL IMMUNOPHARMACOLOGY
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2026
·
IF 4.7
Tianxiao Hu,Jiayu Qi,Yinuo Xu,Jia He,Qingying Tan,Jie Hao,Jing Wang,Jiewei Hong,Jianwei Wang,Lin Chen,Xiaobing Dou
This study aims to investigate the molecular mechanisms by which 4-hydroxynonenal (4-HNE) regulates hydrogen sulfide (H₂S)-producing enzymes, mediating the pathogenesis of metabolic dysfunction-associated fatty liver disease (MAFLD) during pregnancy, thereby offering novel molecular targets for early diagnosis and intervention of related disorders. By establishing a MAFLD pregnant mouse model, we comprehensively examined the regulatory effects of 4-HNE on placental function and its interaction with the H₂S system. We found that MAFLD pregnant mice exhibited significant glucose metabolic disorders, hepatic steatosis, and placental damage. Mechanistically, 4-HNE disrupts H₂S biosynthesis, thereby impairing its inhibitory effect on the inflammasome pathway while simultaneously activating inflammatory cascades. This synergistic action exacerbates placental pathological damage, manifesting as abnormal vascular function and impaired materno-fetal exchange. Notably, exogenous H₂S intervention partially reversed 4-HNE-induced toxicity, suggesting the therapeutic potential of targeting this pathway. These findings demonstrate the pivotal role of the “4-HNE–H₂S–NLRP3” regulatory axis in MAFLD-associated placental injury, providing novel mechanistic insights and potential therapeutic targets for pregnancy complications.
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FOOD CONTROL
·
2026
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IF 6.3
Yiting Duan,Weidong Su,Xinru Deng,Chongyang Liu,Qi Li,Yuan Gao,Xiuzhu Yu
Oxidized triacylglycerols (OxTGs) formed during frying degrade oil quality and raise safety concerns. To resolve oxygen provenance under frying-like conditions, a dual hydrogen–oxygen stable-isotope tracing design (D 2 O, H 2 18 O, 18 O 2 ) was applied to triolein heated at 180 °C for 0–4 h under 3 atm: natural air (NA) + H 2 O, synthetic air (SA)– 16 O 2 + H 2 18 O, and SA– 18 O 2 + D 2 O. Diagnostic fragment ions revealed five triacylglycerols and eight OxTGs dominated by hydroperoxide (–OOH) and hydroxyl (–OH) functionalities, while isotopologue ratios (M+1–M+4)/M quantified label incorporation. Pronounced enrichment occurred only under SA– 18 O 2 + D 2 O, particularly for hydroxylated OxTGs; ratios remained comparatively stable in NA + H 2 O and SA– 16 O 2 + H 2 18 O, consistent with water acting primarily as a kinetic modulator of hydroperoxide turnover and interfacial processes rather than as a direct oxygen donor to OxTGs.The labeling pattern demonstrates that oxygen incorporated into OxTGs derives primarily from molecular oxygen (O 2 ). Mechanistically grounded process controls that limit oxygen availability—such as vacuum or otherwise deaerated frying—are therefore expected to suppress OxTG formation. For decision-ready surveillance and oil-turnover management, an integrated indicator panel is recommended, combining total polar compounds (TPC), sentinel glycerol-core aldehydes (e.g., 9-oxo/10-oxo species), and representative –OOH/–OH OxTGs. Collectively, these findings clarify OxTG formation pathways and provide a practicable basis for risk-informed quality and safety control of frying oils.
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Journal of Sustainable Cement-Based Materials
·
2025
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IF 4.2
Kun Wang,Jinjun Guo
Structural polymerization is a primary factor driving intrinsic property changes in calcium silicate (aluminate) hydrate (C–(A)–S–H). However, the mechanisms by which erosive media induce structural polymerization of C–(A)–S–H gel during the service life of cement-based materials remain unclear. This study investigates the effects of both alkaline and acidic sulfates on the composition and microstructural evolution of C–(A)–S–H through various physical and microstructural analyses. The findings indicate that dehydration condensation reactions of Si–OH groups, resulting from decalcification and carbonation processes, are the main contributors to the polymerization silicate tetrahedra. As the aluminum phase increases, the leaching of Al[IV] from the C–(A)–S–H gel after sulfate erosion becomes more pronounced, leading to a tendency for the original silicate–aluminate chain structure to undergo polymerization and reconstruction. Furthermore, aluminum can only promote the polymerization of silicate tetrahedra within a specific range. This study provides a theoretical foundation for regulating concrete microstructure and optimizing its durability.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Zhonghuan Zhu,Pengbo Liu,Pingping Du,Bo Yu,Xiaopeng Li,Yong Wang,Li-Ping Lv
Rational design of effective non-noble metal-based electrocatalysts with high conductivity, abundant active sites, and superior stability for zinc–air batteries (ZABs) with long-term cycling ability is highly demanded. A suitable carrier that can provide a high specific surface and porous structure to facilitate the exposure of active sites and the diffusion of reactants, products, and charges is of great importance. Herein, one-dimensional (1D) Fe–Zn-doped porous carbon fibers (Fe–Zn@NCF) are prepared from a polymer fiber matrix encapsulated with Fe-doped ZIF-8 nanocrystals by pyrolysis. The Fe–Zn@NCF exhibits good performance toward the oxygen reduction reaction or oxygen evolution reaction. Impressively, the assembled ZAB with Fe–Zn@NCF as the catalyst delivers a maximum peak power density of 184.6 mW cm–2, excellent rechargeability with a round-trip efficiency of 66.5%, and stable operation over 1600 h (800 cycles). These excellent electrocatalytic performances can be attributed to the Fe/Zn-based dual catalytic active sites and the 1D carbon fiber support of the catalyst with a hierarchical porous structure, a large surface area, and high conductivity that can facilitate fast mass and electron transportation and maintain the structural stability of the catalyst during cycling.
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ICARUS
·
2022
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IF 3.657
A. García Muñoz
Photoelectrons , the fast electrons produced in the photoionization of planetary atmospheres , drive transformations in the atmospheric gas that are often inhibited by energy considerations for thermal electrons. The transformations include excitation and ionization of atoms and molecules, which affect the detectability of these gases and constrain the fraction of incident stellar radiation that transforms into heat. To gain insight into these important questions, we build a Monte Carlo model that solves the slowing down of photoelectrons in a gas with arbitrary amounts of H and He atoms and thermal electrons. Our novel multi-score scheme differs from similar tools in that it efficiently handles rare collisional channels, as in the case of low-abundance excited atoms that undergo superelastic and inelastic collisions . The model is validated and its performance demonstrated. Further, we investigate whether photoelectrons might affect the population of the excited hydrogen H(2) detected at some exoplanet atmospheres by transmission spectroscopy in the H- α line. For the ultra-hot Jupiter HAT-P-32b, we find that photoelectron-driven excitation of H(2) is inefficient at the pressures probed by the line core but becomes significant (yet sub-dominant) deeper in the atmosphere where the line wings form. The contribution of photoelectrons to the destruction of H(2) either by collisional deexcitation or ionization is entirely negligible, a conclusion likely to hold for exoplanet atmospheres at large. Importantly, photoelectrons dominate the gas ionization at the altitudes probed by the H- α line, a fact that will likely affect, even if indirectly, the population of H(2) and other tracers such as metastable helium. Future modeling of these excited levels should incorporate photoelectron-driven ionization.
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Polymers
·
2023
·Vol. 15
·期 17
·3574
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IF 5
Guang Yang,Zhonghua Chen,Changwei Lv,Lei Deng,Xiaofeng Luo,Yi Li,Songtao He,Qibin Liu
Hemihydrate phosphogypsum, an industrial solid waste product of phosphoric acid production, is abundant and inexpensive. If the problem of poor water resistance is solved, this material could be substituted for cement and other traditional energy-consuming cementitious materials in the construction industry. This approach would confer important economic and environmental benefits while promoting the resource utilization of phosphogypsum (PG). In this study, hydrophobic and self-cleaning coatings of H-PDMS/PMHS/OTS hybrid nanosilica were prepared on a post-hydroxylated PG surface using sol–gel and impregnation methods. The water contact angle, Fourier-transform infrared spectroscopy, Three-dimensional surface morphology and roughness analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, surface abrasion tests, and tape adhesion tests were used to evaluate the hydrophobicity of the coatings. The results demonstrated that the in situ reaction produced a hydrophobic siloxane/nanosilica hybrid network that bonded to the PG surface via hydrogen bonding, making the otherwise completely hydrophilic PG hydrophobic (PGH-3, contact angle (CA) = 144.1°). The PGH-3 sample exhibited excellent chemical stability, maintaining a contact angle greater than 135° under strongly acidic or alkaline conditions. The contact angle remained at 123.7° after 50 tape-bonding tests. After 100 wear cycles, the contact angle remained at 121.9°. This study presents an environmentally friendly method and a straightforward application procedure to impart hydrophobicity to solid waste PG. Its potential is thus demonstrated in the field of PG-based construction materials and the comprehensive utilization of solid waste.
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Junqiao Jiang,Zhen Li,Min Xiao,Shuanjin Wang,Kenji Miyatake,Yuezhong Meng
Phosphoric acid (PA)-doped polymer electrolyte membranes are the most promising materials for high-temperature proton exchange membranes (HT-PEMs). However, their development is subject to the compromise between proton conductivity and phosphoric acid (PA) doping level. Here, an ether-free QPAF-4 membrane (a copolymer containing perfluoroalkylene and fluorenyl groups with pendant ammonium groups) is directly doped with phosphoric acid and studied as HT-PEMs. Due to the intrinsic micro-phase separation structure of QPAF-4 matrix and strong interaction of quaternary ammonium (QA)-PA, the PA-doped membranes possess high proton conductivity and eminent PA retention at comparatively low PA doping level, respectively. The QPAF-4 membrane with 150% PA uptake (QPAF-4-150%PA) offers a proton conductivity of 52 mS cm −1 at 160 °C. As expected, the single cell with QPAF-4-150%PA membrane shows the maximum peak power density of 683 mW cm −2 at 160 °C under anhydrous condition. Meanwhile, the single cell exhibits excellent durability over a period of 60 h with only a slight reduction in voltage of 3.1%. These results indicate that the as-prepared PA-doped quaternized polymer with micro-phase separation structure seems to offer a promising way to develop performing and long-life HT-PEMs with low PA doping levels.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Chenxiao Yin,Zhi-Xiong Fei,Jingrui Sun,Lin Weng,Xu Wang,Ke-Ke Yang,Ling-Ying Shi
Low-temperature solid–liquid organic phase change materials (OPCMs) offer tremendous opportunities in thermal management techniques but suffer from leakage problems above the melting temperature. Here, inspired with the universal hydro/organogels using three-dimensional polymer networks capable of holding large amounts of liquid solvents, a kind of form-stable high-enthalpy biphasic phase change organogels (BPCOGs) were developed by the integration of hydrophobic association for synthesizing intrinsic phase change matrices and H-bonding interaction for binding OPCM liquids. The porous phase separated poly(acrylamide-octadecyl acrylate) (P(AM- co -OA)) matrices with uniformly dispersed thermal conductive carbon nanotubes were fabricated from the hydrophobically associating hydrogels (HAHs), in which POA segments provide the phase change energy storage microdomains and the PAM network is capable of binding a series of melted OPCMs by hydrogen bond engineering. The fabricated BPCOGs possess form-stability, high phase change enthalpy (high up to 215.5 J g −1 ) and high energy storage efficiency (>90%), and show excellent electrical/optical-thermal energy conversion as well as shape memory performances. This study provides a universal strategy to prepare flexible biphasic OPCMs suitable for a variety of solid–liquid OPCMs including fatty alcohols, fatty acids and polyethylene glycol, and demonstrates the great potentials of these BPCOGs in solar energy utilization and functional flexible devices.
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APPLIED CLAY SCIENCE
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2021
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IF 5.467
Xinyu Li,Shunyu Han,Dongdong Guan,Nanzhe Jiang,Jingzhe Xu,Sang-Eon Park
The direct synthesis of H-ZSM-5 catalysts from natural aluminosilicate clays is important for the conversion of raw clay resources to high-value-added products. Herein, the solid-like-state conversion was used to directly prepare nano-H-ZSM-5 with uniform morphology and particle size (~300 nm) from leached illite (ISR) as both Si and Al source. Crystallization kinetics indicated that the reactivity of ISR is similar to that of commercially fabricated products and ISR could be rapidly (within 5 h) converted into nano-H-ZSM-5, the crystallinity , morphology, and crystal size of which were strongly affected by the amount of tetrapropylammonium hydroxide (TPAOH). Additionally, the residual Al of ISR uniformly intruded the H-ZSM-5 framework to provide active sites for the methanol-to-aromatics reaction. The catalytic performance stability and BTX selectivity of nano-H-ZSM-5 for this reaction surpassed those of a commercial ZSM-5 catalyst because of the synergistic effect among the specific surface area and volume of micropores , uniform morphology and particle size, and homogeneously distributed acidic sites. This rapid, efficient, and cleaner synthesis reported herein was shown to have no necessity of ion exchange with ammonium salts, to be H-form of ZSM-5 as well as improve the productivity of HZSM-5 catalysts. And consequently, it is expected to reduce the cost of synthesis and provide an opportunity for the comprehensive development and utilization of illite clay resources.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
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IF 3.171
Xiao Zhao,Xuan Shi,Zhongshun Chen,Long Xu,Chengyi Dai,Yazhou Zhang,Xinwen Guo,Dongyuan Yang,Xiaoxun Ma
A series of ZnO-ZrO 2 solid solutions with different Zn contents were synthesized by the urea co-precipitation method, which were coupled with H-ZSM-5 zeolite to form bifunctional catalysts. As a new benzene alkylation reagent, syngas was used instead of methanol to realize the efficient conversion of syngas and benzene into toluene and xylene. A suitable ratio of ZnO-ZrO 2 led to the significant improvement in the catalytic performance, and a suitable amount of acid helped to increase the selectivity of toluene/xylene and reduce the selectivity of the by-products ethylbenzene and C 9 + aromatics. The highest benzene conversion of 89.2% and toluene/xylene selectivity of 88.7% were achieved over 10% ZnO-ZrO 2 &H-ZSM-5 (Si/Al = 23) at a pressure of 3 MPa and a temperature of 450 °C. In addition, the effect of the zeolite framework structure on product distribution was examined. Similar to the molecular dynamics of aromatic hydrocarbons , H-ZSM-5 zeolites comprise 10-membered-ring pores, which are beneficial to the activation of benzene; hence, the conversion of benzene is higher. H-ZSM-35 and H-MOR zeolites exhibited small eight-membered-ring channels, which were not conducive to the passage of benzene; hence, the by-product ethylbenzene exhibits a higher selectivity. The distance between the active centers of the bifunctional catalysts was the main factor affecting the catalytic performance, and the powder mixing method was more conducive to the conversion of syngas and benzene.
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CEMENT AND CONCRETE RESEARCH
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2020
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IF 8.328
Xin Liu,Pan Feng,Wei Li,Guoqing Geng,Jiale Huang,Yun Gao,Song Mu,Jinxiang Hong
Calcium silicate hydrate (C-S-H), the most important Portland cement hydration product , determines the mechanical properties and durability of cementitious materials . In marine environment, C-S-H often suffers from sulfate attack – one of the most common and severe degradations for concrete. pH is considered as a critical factor in determining the deterioration behavior of C-S-H during sulfate attack, of which the significance may be overlooked. This study focused on the role of pH on the deterioration of C-S-H in terms of the composition and nano/micro structure under sulfate attack. The results show that lowering pH aggravates the decalcification of C-S-H, whereas a strong alkaline condition is beneficial to increase the resistance to deterioration. An increase in the mean chain length together with the proportion of large pores (>10 nm) is observed when C-S-H is subjected to low-pH sulfate attack (pH = 10–12), resulting in a relatively loose structure. The deep analysis on defective tobermorite model reveals that calcium at the interlayer of C-S-H nanostructure is readily removed under sulfate attack, thereby improving the potential of Si-O-Si groups formation and increases the mean chain length of C-S-H.
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