FOOD CHEMISTRY
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2026
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IF 10.4
Mengting Zhao,Yingxue Tang,Xiaoyu Yin,Majida AL-Wraikat,Junfeng Fan,Xiangning Chen,Bolin Zhang
This study develops MOF patches for controlled NO release in produce preservation. • MOF loading effectively protects NO donors from loss during wet-casting fabrication. • Three metal-node MOF patches enable differential NO release profiles. • Patch integrates moisture absorption, microorganism and respiration inhibition. • MOF patches significantly extend produce shelf life while reducing precursor loss. Nitric oxide (NO) preservation suffers from instability and safety issues via conventional single-exposure treatments, while wet-casting methods cause substantial NO donor loss. This study developed metal-organic framework (MOF)-mediated controlled-release patches to address these limitations. Three MOFs (Cu-MOF, Zn-MOF, Fe-MOF) with distinct pore structures were synthesized, achieving 26.9%–38.2% L-arginine loading. The resulting gelatin-polyacrylic acid sodium hydrogel patches exhibited tensile strength of 3.03–4.84 MPa and elongation at break of 131.3%–240.1%, and dissolution rates of 12.4%–17.2%. They also showed significant antimicrobial activity against E. coli, S. aureus, and A. niger . MOF loading elevated precursor utilization efficiency to 70%–82.5%. The patches achieved sustained release of H₂O₂ (8.0–9.6 mmol/g) and NO (41.7–50.6 ppm) over 12 days, extending cherry tomato shelf life to 12 days at room temperature while maintaining total bacterial levels within safe limits. This work establishes MOF-mediated controlled release for green preservative gas utilization. Download: Download high-res image (189KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yang Liu,Yuanchao Xie,Yanjiao Dai,Jiayao Li,Maosen Hu,Hongtao Wang,Dan Han,Jianan Ma,Shengbo Sang
Doping with transition metal ions is an effective way to significantly enhance the performance of MOS-based gas sensors. Conventional doping strategies often lack control over morphological evolution and fail to elucidate the complex interactions between dopants and intrinsic defects. Herein, we demonstrated a rational defect-engineering approach by introducing W 6+ dopants into morphology-prefabricated layered ZnO hexagonal prisms, which triggered a controlled transformation into ultrathin nanosheets (15-20 nm thickness) while systematically changing oxygen vacancy and zinc vacancy concentrations. The concentration changes of intrinsic defect, as well as the formation energy, were confirmed through various characterization methods and DFT calculations. The gas sensitivity test results showed that the response has been significantly enhanced after doping W 6+ , which can reach 64 to 1 ppm of NO 2 , and the detection limit was as low as 200 ppb. At the same time, it has excellent stability and selectivity. Finally, the gas-sensing mechanism thoroughly explored the charge balance process caused by W 6+ doping, the functions of oxygen vacancy and zinc vacancy, and the NO 2 sensitization mechanism.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huidong Tang,Chen Liu,Donggou Sun,Wenbo Zhang,Xiaohua Zhu,Yixing Ma,Jiacheng Bao,Kai Li,Xin Sun,Ping Ning
Fe 2 O 3 /g-C 3 N 4 accelerates Fe redox cycling for efficient H 2 O 2 activation. • g-C 3 N 4 pumps electrons to Fe sites, boosting interfacial charge transfer. • Alkaline microenvironment uniquely steers ROS pathway toward O 2 •− generation. • Process yields 93.2% NO x removal, converting NO into valuable N-resources. To overcome the challenges associated with low-temperature industrial flue gas denitrification, this study presents a highly efficient Fe 2 O 3 /g-C 3 N 4 heterogeneous Fenton catalyst synthesized via a facile impregnation approach. This composite effectively activates H 2 O 2 for deep NO x elimination. Under optimal alkaline conditions, the Fe 2 O 3 /g-C 3 N 4 system achieved a remarkable maximum NO x removal efficiency of 93.2%, while demonstrating exceptional durability by retaining over 80% efficiency across five consecutive reaction cycles. Comprehensive experimental characterization coupled with density functional theory (DFT) calculations reveal that g-C 3 N 4 serves as an electron-rich reservoir. This framework systematically accelerates the rate-limiting Fe 2+ /Fe 3+ redox cycling on the Fe 2 O 3 surface through enhanced interfacial charge transfer. Crucially, the alkaline environment uniquely steers the reactive oxygen species (ROS) evolution pathway toward the highly selective generation of superoxide radicals (O 2 •− ). These predominant O 2 •− species rapidly oxidized NO to form peroxynitrite intermediates, thereby promoting the deep conversion of NO into recoverable nitrate and nitrite products. This work provides a robust and scalable strategy for low-temperature NO ₓ purification and offers new mechanistic insights into how the reaction microenvironment regulates radical selectivity. Download: Download high-res image (294KB) Download: Download full-size image
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Chaofan Ma,Huiyu Su,Yazhou Yang,Chaoqi Zhu,Jiahong Tang,Kechen Zhou,Dawen Zeng
Dimethyl carbonate (DMC), the primary component of lithium-ion battery (LIBs) electrolytes, is volatile at room temperature and can serve as a key indicator for detecting electrolyte leakage. In this work, leaf-like Cs3Sb2Cl9 was synthesized via a single solvent solubility difference method, with its surface exhibiting strong orientation on the (110) crystal plane. The sensor demonstrated excellent gas-sensing performance toward detecting DMC (50 ppm of DMC of 3.94), with relatively short response and recovery times of 104 and 66 s, respectively (when tested 25 ppm of DMC), and a low detection limit of 100 ppb. In situ infrared spectroscopy first revealed that Cs3Sb2Cl9 catalyzes the decomposition of DMC into the byproduct methanol during the adsorption process. Density functional theory (DFT) calculations further elucidated the adsorption behavior of DMC on different active sites of the Cs3Sb2Cl9 (110) plane, indicating that the Sb site possesses a stronger adsorption affinity for DMC. Provides strong evidence that the B site of the perovskite serves as a highly active site. This study not only presents a preliminary exploration of Cs3Sb2Cl9 in gas sensing but also provides valuable insights into the sensing mechanisms of lead-free halide perovskites.
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ACS Sensors
·
2026
·
IF 10.9
Ruilong Ma,Youlin Gu,Zhenyu Liu,Zhencheng Liu,Wenhao Wu,Fanhao Meng,Xiaoyan Peng
Hydrogen sulfide (H2S) poses significant risks in industrial settings due to its high toxicity and flammability, making its efficient detection crucial for operational safety. In this study, high-performance MEMS gas sensors based on a nitrogen-doped carbon quantum dot/nickel cobaltite (N-CQD/NiCo2O4) nanocomposite were developed, achieving highly sensitive H2S detection. Characterization techniques such as XRD, XPS, SEM, and TEM confirmed the successful loading of N-CQDs onto the NiCo2O4 surface, leading to an increase in oxygen vacancy concentration. The sensor with NCQD/NCO-2 exhibited excellent H2S selectivity, good repeatability, and long-term stability over 40 days. At low-temperature heating, the response to 1000 ppm H2S was enhanced by a factor of 6.84, with a theoretical detection limit of 9.42 ppb. Beyond the material-level enhancement, this work integrates N-CQD-mediated surface/interfacial activation, a low-temperature-heated MEMS sensor array, and a lightweight temporal regression model for H2S quantification. The DCG-Net model achieved accurate concentration prediction with an R2 value of 0.9902 and was successfully deployed, offering a compact material-device-algorithm solution for intelligent H2S monitoring.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Feng Wang,Heng Yi,lipeng Zhong,Lu Tian,Jiahui Liu,She Chen,Qiuqin Sun,xincheng zhang
Gas-solid interfaces are among the most vulnerable regions in gas-insulated power equipment. Electric-field-assisted stereolithography (SLA) can induce the redistribution of high-permittivity fillers to form graded structures, thereby tailoring dielectric properties and interfacial electric-field distributions. However, the relationships among driving parameters, particle redistribution, surface charge dissipation, and discharge characteristics remain insufficiently understood. In this study, BaTiO₃/photocurable resin composites were fabricated, and the effects of filler volume fraction, driving voltage, and electric-field application time on particle distribution, dielectric properties, surface potential decay, and interfacial discharge characteristics were investigated. Increasing the driving voltage and application time enhanced the spatial non-uniformity of the BaTiO₃ particles, increased the relative permittivity, accelerated surface potential decay, increased the surface flashover voltage and partial discharge inception voltage (PDIV), and reduced partial discharge activity. For the 10 and 20 vol% composites, the maximum field strengths under the strongest assumed permittivity gradient were approximately 2.98% and 2.73% lower than those of the corresponding homogeneous cases, respectively.Compared with the 400 V and 1 min condition, the relative permittivity, surface flashover voltage, and PDIV increased by approximately 12.7%, 28.7%, and 65.6%, respectively, at 1200 V and 30 min. Under the same driving condition, the surface potential of the 10 vol% composite decayed by approximately 91.7% within 90 s. These results indicate that electric-field-induced particle redistribution can improve gas-solid interfacial discharge characteristics. The dielectric non-uniformity associated with particle redistribution may regulate the interfacial electric-field distribution and contribute to the observed improvements. Download: Download high-res image (266KB) Download: Download full-size image
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POLYMER
·
2026
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IF 5.1
Xin Pan,Yaru Li,Zhiyu Chen,Jie Liu,Chao Chen,Zhao Wang,Dean Shi,Weiwei Lei,Liqun Zhang
Isophthalate-rich copolyesters form amorphous cross-linked elastomers. • PPeSATI60 shows O 2 /N 2 permeabilities of 0.24/0.18 Barrer. • PALS reveals smaller free-volume holes at higher DMI contents. • DMA and LF-NMR indicate stronger constraints on local chain mobility. Suppressing gas permeation while retaining elastic deformability remains a key challenge in the design of barrier elastomers. Here, a series of poly(1,5-pentylene succinate- co -itaconate- co -terephthalate- co -isophthalate) elastomers (PPeSATI) was prepared by transesterification, melt polycondensation, and peroxide curing via the carbon–carbon double bonds in the itaconate units. Dimethyl isophthalate was incorporated as a nonlinear aromatic comonomer into a flexible polyester backbone derived from dimethyl succinate, dimethyl itaconate, dimethyl terephthalate, and 1,5-pentanediol. The isophthalate fraction was systematically varied to examine its influence on the mechanical and gas-barrier properties of the resulting elastomers. The resulting copolyesters showed no melting or crystallization transitions in the DSC thermograms, while retaining glass-transition temperatures below room temperature and exhibiting 5% weight-loss temperatures above 356 °C. PPeSATI 60 exhibited O 2 and N 2 permeability coefficients of 0.24 and 0.18 Barrer, respectively, approximately one order of magnitude lower than those of the laboratory-prepared unfilled BIIR reference vulcanizate. Low-field NMR spectroscopy indicated an overall increase in apparent network constraints across the PPeSATI series. As the isophthalate fraction and total aromatic content increased, DMA results showed an overall shift of the β -relaxation peak toward higher temperature. PALS results indicated decreases in the mean free-volume hole size and relative fractional free volume ( f v ) across the same series. These results demonstrate that incorporating isophthalate units is an effective strategy for developing gas-barrier polyester elastomers. Download: Download high-res image (352KB) Download: Download full-size image
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Shaohui Huang,Jin Li
In order to solve the problems of insufficiently rapid response and recovery and poor moisture resistance when zinc oxide is used as a gas sensitive material, a flexible frame material with hydrophobicity, ZIF-8, was introduced to modify the surface of ZnO, and then doped Ag nanoparticles, which can be electron sensitized with ammonia, to obtain Ag modified ZnO@ZIF-8 nanoparticles. At room temperature (RT, ∼25 °C), the response time of ZnO, ZnO@ZIF-8, and Ag modified ZnO@ZIF-8 nanoparticles to 500 ppm ammonia is 74.3 s, 20.2 s, and 8.0 s, and the recovery time is 36.0 s, 23.1 s, and 16.8 s, respectively. The fitting detection limit of Ag modified ZnO@ZIF-8 nanoparticles for ammonia was 83 ppm. Compared with pure ZnO, the moisture resistance of ZnO@ZIF-8 and Ag modified ZnO@ZIF-8 was significantly improved after coating with ZIF-8.
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PLoS One
·
2025
·Vol. 20
·期 10
·e0334495
·
IF 2.6
Yujia Xiong,Jun Xin,Chao Su,Lei Liang,Qinghua Xiao,Haifeng Ye,Zilai Mei
With the extensive exploitation of shale gas fields in southern Sichuan, China, the Weiyuan Area – a key production zone within this region – has experinced a growing gas well plugging problem, which significantly hampers production efficiency. This study presents a comprehensive analysis of plugging problems in this area. Plugging samples were obtained from typically affected gas wells and subjected to a suite of analytical techniques. Results indicated that plugging materials were predominantly inorganic, primarily comprising iron-based impurities and mineral scale deposits, while organic components—present in minor proportions—primarily composed of long-chain alkanes. The formation of these plugs is attributed to downhole corrosion, high-salinity formation water, and complex chemical interactions occurring within the wellbore. In response, specialized plugging removal agents were developed: an organic composite acid-organic solvent system achieved up to 98% dissolution efficiency for iron oxide-dominated plugs; a chelating agent based on CDTA was optimized for iron sulfide-based plugging; and the DTPA-based system exhibited superior dissolution efficiency for barium sulfate/calcium carbonate scale deposits. This research provides a scientific basis for effectively mitigating plugging issues in comparable shale gas fields.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Runji Yang,Weiqing Guo,Qingxi Jin,Yaohua Xu,Feng Wei,Jiliang Zhang
Sensitive, selective and low-cost sensors for nitric oxide (NO) detection are significant due to its toxicity. This report investigates the tunable sensing behavior in chemiresistive NO sensors using α-Fe2O3 nanoparticles as sensing materials. The sensor exhibits a distinctive sensing characteristic with a reversible transition from p- to n-type sensing behavior, which is regulated by working temperature. The temperature-modulated (200–400 °C) and concentration-dependent (100–1000 ppm) p–n transition diagrams are constructed, while the gas sensing behaviors can be well described using a two-isotherm model based on Langmuir adsorption theory. Detailed reactions between NO and α-Fe2O3 at each temperature are proposed, and the corresponding activation energy is calculated. It is demonstrated that the p–n transition mechanism during NO detection is modulated by the dynamic variations in the α-Fe2O3–NO interaction. The p–n transition observed as a specific behavior in NO gas sensing can provide a novel approach to enhance the recognition capability for NO gas.
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ACS Sensors
·
2025
·
IF 9.1
Jianyu Ling,Tao Zhang,Dongchang Li,Hongpeng Zhang,Yu Tong,Linhu Jin,Xiaoyu Ji,Kewei Zhang,Mingzhe Zhang
Increased safe and environmental awareness in production processes necessitates an ever-growing demand for efficient detection of ethanol/n-butanol/diesel fuel blends (clean energy) in rapid, real time. However, the forces between multiplexed organic molecules in complex environments induce a decrease in the flash point, thus requiring sensors with high selectivity and low-temperature detection capabilities. In this study, an In2O3/WO3 multilevel heterojunction is assembled by utilizing the electrostatic interaction between the hydroxyl group of In(OH)3 and WS2. The material achieves dual detection of ethanol and n-butanol under the excitation of light and temperature fields. It also possesses fast response/recovery times, excellent selectivity, and good long-term stability. The WO3 has a defect-rich (002) exposed surface in the In2O3/WO3 heterojunction, and the special electronic structure of the heterojunction induces carrier migration at the S-scheme heterointerface under photothermal activation, which promotes the generation of more reactive oxygen species (O2–, O–) from the sensing material. The special chemical reaction of the sensor between oxygen anions and the target gas at room temperature (RT) and 120 °C is the basis for the realization of dual-selective detection of ethanol and n-butanol. The sensing mechanism of the WO3/In2O3 heterojunction for ethanol/n-butanol has been systematically investigated based on energy band structure analysis and in situ Raman spectroscopic characterization. This work focuses on the potential of metal oxide-based S-scheme heterojunctions for high-performance gas sensor applications.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Run Pan,Abubakar Yusuf,Chengjun Wang,Jianrong Li,Zhiyu Xiao,Shuai Liu,Yidong Zhong,Yong Ren,Zheng Wang,Hainam Do,John L. Zhou,George Zheng Chen,Jun He
Natural gas vehicles (NGVs) offer significant environmental advantages by reducing pollutant emissions, but effective exhaust treatment remains a challenge due to high methane emissions and catalyst deactivation over time. This study introduces a core-shell Pd@CeO 2 /Al 2 O 3 three-way catalyst (TWC) designed to enhance the efficiency and durability of NGV exhaust treatment. The core-shell structure significantly improves catalytic performance. The optimized Pd@Ce/Al (S-500) catalyst demonstrates excellent low-temperature activity, with T 50 values of 336 °C for CH 4 and 397 °C for NO. It also achieves remarkable reductions of 113 and 177 °C in the T 90 for CH 4 and NO conversion, respectively, compared to the non-core-shell counterpart, Pd-Ce/Al (S-500). Characterizations reveal enhanced metal-support interactions, increased oxygen vacancies, and optimized Pd-CeO 2 interfaces as key active sites. Density functional theory calculations further demonstrate that the core-shell structure facilitates electron transfer at Pd-CeO 2 interfaces and lowers energy barriers for three-way reactions, enhancing catalytic efficiency. Notably, the core-shell Pd@Ce/Al (S-500) catalyst maintains high conversion efficiency for CH 4 and NO, with only slight losses (5.5% and 6.6%, respectively) over a 100-h time-on-stream stability test, following 16 h of harsh hydrothermal aging at 800 °C, showcasing its long-term stability. These findings provide a deeper understanding of the role of the core-shell Pd@CeO 2 structure in Pd-based TWCs and offer valuable insights for designing durable and efficient catalysts to meet the stringent emission standards of NGVs.
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