ACS Sensors
·
2025
·
IF 9.1
Peng Wang,Ming Li,Zhiyuan Zhu,Chengli Tang
With the advancement of smart detection technologies, gas sensors have gained increasingly widespread applications in environmental monitoring, industrial safety, medical diagnostics, and intelligent agriculture. The response curve of a single gas sensor is conventionally used to calculate sensor performance evaluation parameters of response/recovery time and response value. The selectivity of a single sensor is currently evaluated by a selectivity coefficient based on the response value, which faces difficulty in distinguishing gases with different concentrations. In this study, a new metric of fill factor (FF) derived from response curve morphology features was introduced to offer a novel solution for single-sensor selectivity analysis. Three variants of the novel metrics, FFres (response phase fill factor), FFrec (recovery phase fill factor), and FF (total fill factor), can be calculated from the response curve. As a proof-of-concept, the FFs of WS2, WS2@PANI, and Au/PANI/WS2 sensors at different concentrations of ammonia, acetone, methanol, ethanol, and water vapor were calculated and used for gas selectivity analysis. Results demonstrated distinct FF ranges for ammonia and other gases, validating FF as a potential selectivity indicator. This approach provides a multidimensional analysis framework for enhanced single-sensor discrimination by constructing a parameter space incorporating curve morphology features.
研究领域:
传感器技术
·
环境监测
·
工业安全
·
智能农业
·
生物医学传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2017
·Vol. 98
·期 1
·154-165
·
IF 2.463
Yuqin He,Haide Zhang,Nana Wen,Rongsuo Hu,Guiping Wu,Ying Zeng,Xiong Li,Xiaodan Miao
BACKGROUND Arabica coffee is a sub-tropical agricultural product in China. Coffee undergoes a series of thermal reactions to form abundant volatile profiles after roasting, so it loses a lot of reducing sugars and amino acids. Adding carbonyl compounds with amino acids before roasting could ensure the nutrition and flavour of coffee. The technology is versatile for the development of coffee roasting process. This investigation evaluates the effects of combining maltose and lysine (Lys) to modify coffee aroma and the possibly related mechanisms. Arabica coffee was pretreated with a series of solvent ratios of maltose and Lys with an identical concentration (0.25 mol L −1 ) before microwave heating. RESULTS It was found that the combination of maltose and Lys significantly ( P ≤ 0.05) influenced quality indices of coffee (pH and browning degree). Ninety-six aromatic volatiles have been isolated and identified. Twelve volatile profiles revealed the relationship between fragrance difference and compound content in coffee. Moreover, coffee aroma was modified by a large number of volatiles with different chemical classes and character. CONCLUSION Thus, our results suggest that the combination of reagents changed overall aroma quality through a series of complex thermal reactions, especially the ratio of Lys/maltose over 2:1. © 2017 Society of Chemical Industry
研究领域:
食品科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Ningyuan Wang,Xiaoqiang Wang,Yue Liu,Zhongbiao Wu
Traditional vanadium-based selective catalytic reduction (SCR) deNO x catalyst can hardly adapt to the gas conditions (much high NO 2 /NO x ratio at lower temperature) of the start-up and low loading periods for a gas turbine . Therefore, a W–Ti-CeO x catalyst with NO x storage and reduction (NSR) function was developed in this work for gas turbine exhaust NO x elimination. The experimental results reveal that W–Ti-CeO x catalyst exhibits high NO 2 adsorption capacity at relatively low temperature while that is quite low for V–W/TiO 2 . The abundant surface Ce 3+ species can be mainly responsible for its high adsorption ability owing to the reaction between NO 2 and Ce 3+ to form nitrate/nitrite species and NO. Meanwhile, the adsorption capacity of W–Ti-CeO x can easily regenerate at medium–high temperature and NH 3 -SCR reaction. Furthermore, W–Ti-CeO x also shows good NH 3 -SCR activity, which can fulfill the deNO x process at high temperature. The addition of W and Ti into ceria can enhance the surface acidity and redox ability, thereby increasing the SCR activity. This work proposes a novel storage-reduction strategy for NO x elimination throughout the operation of gas turbines.
研究领域:
环境工程
·
催化
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Hang Yu,Sining Kong,Wenrui Li,Yitao Gan,Lijian Jin,Ruiyang Gao,Fan Zhang,Linjun Yang
Biphasic solvent maintains over 92% CO 2 capture efficiency in 168 h operation. • D4M2 achieves 25% regeneration energy reduction compared to MEA at lab scale. • Pilot-scale validation yields 2.7 GJ/t CO 2 , 37% lower regeneration energy than MEA. • Stable viscosity and phase separation maintained throughout 168 h operation. Liquid-liquid phase change absorbents have attracted increasing attention for energy-efficient capture of low concentration CO 2 flue gas, yet most evaluations remain limited to batch experiments, with few studies conducted on continuous integrated platforms. In this study, a multicomponent amine phase change absorbent (DMAPA-MAE-DMCA-DMSO-H 2 O) was developed for gas turbine flue gas containing approximately 4 vol% CO 2 and high oxygen levels. Following batch screening, the optimal formulation (D4M2) was identified and evaluated in a 5 Nm 3 /h continuous flow system over 168 h. Capture efficiency, regeneration energy consumption, and operational stability were systematically assessed and compared with 30 wt% MEA. At a L/G ratio of 2.1 L/m 3 , D4M2 maintained a CO 2 capture efficiency above 90% with a regeneration energy consumption of 3.73 GJ/t CO 2 , representing a 25% reduction relative to MEA. During 168 h of operation, capture efficiency remained above 92%, regeneration energy was stable at 3.6–3.8 GJ/t CO 2 , and phase separation behavior showed no significant degradation. Scale-up to a 15 Nm 3 /h pilot system further reduced regeneration energy to 2.68 GJ/t CO 2 at an optimized L/G ratio of 1.8 L/m 3 , corresponding to a 37% reduction compared with MEA while maintaining capture efficiency above 90%. These results demonstrate the strong energy-saving potential and scalability of the developed phase change absorbent for CO 2 capture from gas turbine flue gas.
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Mingwei Cai,Fuhui Liang,Fudong Deng,Baisheng Liang,Shiyang Zhang,Yonggang Min
Helium extraction from natural gas demands ultra-high He/CH 4 selectivity (>1000), yet this benchmark remains largely unmet by polymeric membranes due to the permeability-selectivity trade-off and the challenge of constructing sub-4 Å sieving channels. Here, we report an orthogonal light–heat dual-crosslinking strategy to program the free-volume topology of polyimide membranes. A photoreactive precursor (6FCC-X) was synthesized via a click reaction by incorporating photosensitive units (C═C─S) and varying amounts of thermally labile─COOH groups into the backbone. UV irradiation first triggers [2+2] cycloaddition to construct a dense and uniform super-crosslinked network, which defines the primary molecular-sieving framework. Subsequent thermal decarboxylation generated rigid biphenyl linkages that are proposed to function as molecular-strut-like structural motifs, enhancing chain rigidity, improving micropore connectivity, and refining sub-4 Å sieving constrictions. This sequential topology programming decouples helium transport from methane exclusion, which enables the optimized 6FCC-3-CR membrane to achieve a He permeability of 33.9 Barrer and an exceptional He/CH 4 selectivity of 3767, outperforming most reported polymer-based membranes and rivaling advanced carbon molecular sieve membranes. This work establishes a molecular-strut-mediated topology-programming principle for polymer molecular sieves, offering a general route to reconcile fast transport with precise molecular exclusion.
✓ 已验证
DOI
高影响因子
Frontiers in Materials
·
2023
·
IF 3.2
Guojie Xu,Mingyi Chen,Yufei Gao,Ying Chen,Zhifeng Luo,Han Wang,Jie Fan,Jie Luo,Weicheng Ou,Jun Zeng,Ziming Zhu,Rouxi Chen
Electrospinning (ES) of ceramic fibers has mostly remained in the research level, which can be because of the hard process and parameters controlling the low rate of production. The yield of fiber production by solution blow spinning (SBS) is exciting but the production process is unstable due to the reverse flow phenomenon. In this paper, we prepared high-performance ceramic fibers by gas-assisted electrospinning (GES), which combined the advantages of ES and SBS. Also, comprehensive numerical and experimental analysis for nanofibers produced using GES are provided. The gas flow characteristics through different parameters' nozzle were investigated numerically using computational fluid dynamics and experimentally in a custom-built gas-assisted electrospinning setup to produce SiO2 nanofibers.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Xiaoran Li,Kehui Cen,Jinjin Li,Li Qiu,Xiao Yang,Dengyu Chen
In this work, the co-pyrolysis of hemicellulose and lignin for production of biochar, bio-oil and gaseous products showed interactions between both the components. These interactions were identified by comparing the actual values of product yields with RSM-predicted values derived from individual component pyrolysis. The experiments were designed using response surface methodology (RSM), with co-pyrolysis factors that included temperature (400 – 800 °C), time (5 – 30 min), and hemicellulose percentage (0 – 100%). The results indicated that the co-pyrolysis interactions promoted biochar yield, driven primarily by temperature and residence time. For bio-oil yield, the interaction was temperature-dependent; high temperatures (700–800 °C) combined with optimized residence time enhanced yields. Similarly, the total gas yield was maximized at 600 °C through interaction regulation. In addition, the co-pyrolysis interactions increased the H 2 yield while decreasing the CH 4 yield and the HHV of the gas. RSM optimization identified the optimal conditions for maximizing biochar, bio-oil, CO + H 2 , and gas HHV, with predictions agreeing with experiments (<2% deviation), confirming the model's reliability. DFT calculations revealed the reaction pathways of 2-methoxy-4-methylphenol decomposition to gaseous products. The combination of RSM and DFT enabled the process design and precise mechanistic analysis of gas products from the co-pyrolysis of hemicellulose and lignin in an efficient manner.
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 12
·1340
·
IF 2.935
Fang Zhang,Jing Dou,Hui Zhang
Two-dimensional metal–organic framework (MOF) nanosheets with molecular sieving properties and unique dimensional advantages are highly desired as polymer fillers for gas separation applications. Regarding polymer-supported MOF membranes, it is crucial to enhance the adhesion between the polymeric substrate and the MOF component and avoid MOF particle agglomeration. In this study, hydrophobic, embedded nanoporous nanosheets of a 2D zeolitic imidazolate framework synthesized using zinc salt and 2-methylimidazole (Hmim) aqueous solution (ZIF-L) were incorporated into a carboxymethyl cellulose (CMC) solution to form a steady mixed aqueous suspension through one-step solution blending. This prepared the composite membranes with a fine dispersion of ZIF-L nanosheets (up to loadings of 52.88 vol %) and good adhesion within the highly dense structural CMC matrix due to the strong interactions between ZIF-L and CMC, as confirmed by FTIR, Zeta potential, XPS, and SEM analysis. The potential advantages of CMC over classic polymer matrices used for gas separation mainly include: (a) Good interaction, (b) high dispersion of ZIF-L nanosheets, (c) the gas barrier nature of the CMC membrane, and (d) a facile water-based synthetic process. Based on the molecular sieving effect of ZIF-L and the gas barrier nature of the CMC matrix, gas permeation tests (H2, CO2, N2, CH4) of the mixed membrane showed a great improvement in gas selectivities compared with the CMC membrane and the reported pure ZIF membranes.Keywords:carboxymethyl cellulose;metal–organic framework nanosheets;interactions;gas permeability;gas selectivity
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 45
·29137-29142
·
IF 4.036
Zhisheng Lai,Minhui Shen,Yong Shen,Yu-Xin Ye,Fang Zhu,Jianqiao Xu,Gangfeng Ouyang
Hydrogen bond networks (HBNs) have piqued the interest of the scientific community due to their crucial roles in nature. However, HBNs that are isolated from complicated backgrounds for unraveling their characteristics are still scarce. Herein, we propose that HBNs exist in complex anions formed between α-cyclodextrin (α-CD) and four benzoic acids (RBAs) in the gas phase. The complex anions are facilely extracted from solutions via the electrospray ionization technique, and subsequently activated through collision for the investigation of their transition dynamics. It is revealed that the generation of deprotonated α-CD and neutral RBAs is the unexpected dominant dissociation pathway for all the four complex anions, and the complex anions formed from more acidic RBAs exhibit higher stabilities. These dissociation results are successfully explained by the cooperative stretching dynamics of the proposed HBNs that are formed involving the intramolecular HBN of α-CD and the intermolecular hydrogen bonds (HBs) between α-CD and RBAs. Furthermore, the rarely observed low barrier HBs (LBHBs) are suggested to be present in the HBNs. It is believed that the present complex anions can serve as a facilely accessible and informative model for studying HBNs in the future.
研究领域:
物理化学
·
分析化学
·
分子科学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2019
·Vol. 3
·期 1
·98-113
·
IF 0
Xu Guojie,Chen Xun,Zhu Ziming,Wu Peixuan,Wang Han,Chen Xindu,Gao Wei,Liu Zhen
Multi-needle electrospinning is an effective method to increase the productivity of nanofibers. In this paper, the number of single-needle jets was increased to further improve the production efficiency. As the traditional method for increasing the number of single-needle jets has poor controllability and persistence, we proposed a gas-assisted method to increase the yield of nanofibers. A coaxial gas auxiliary needle was designed with an intermediate shaft supplied gas and the outer shaft supplied solution. Innovatively using pulse gas to produce continuous and stable bubbles which are ruptured on the needle. The liquid film is continuously disturbed, which generates jets in the electric field, thereby increasing the number of jets of a single needle. After optimization of the single-needle gas-assisted electrospinning process, the stable spraying process of 16-pin multi-needle electrospinning has been realized. The gas-assisted electrospinning productivity was 4.7 times higher than that of without gas assistance. It provided a new idea for improving the stable production of the multi-needle electrospinning.
Graphical abstract
研究领域:
生物医学工程
·
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
DOI
Materials Today
·
2026
·
IF 24.1
Wenjian Zhang,Hegeng Li,Lanpeng Guo,Xinyi Chen,Jingqiu Chen,Rongyu Mao,Bingbing Chen,Hua-Yao Li,Rui You,Xiangyang Wei,Houjin Zhang,Huan Liu,Zheng You
The human olfactory receptors are specialized to a narrow range of odorants. Ideally, an artificial olfactory sensor should possess one type of specific receptor to recognize a limited number of gaseous molecules. However, current artificial olfactory receptors remain constrained by poor selectivity due to the absence of specific molecular recognition mechanisms. Here, we developed biomimetic gas selective electrodes (GSEs) featuring a novel sensing mechanism, which leverages an enzyme/quantum dot (QD) framework to achieve molecularly specific recognition through the intrinsic chemical binding sites of the enzyme. Several enzymes, such as superoxide dismutase 1 (SOD1), polyphenol oxidase (PPO), formaldehyde dehydrogenase (FALDH), and alcohol oxidase (AOx), are immobilized on QDs for the selective detection of hydrogen sulfide, phenol, formaldehyde, and ethanol, respectively, across a background of 20 gases. QD surface ligands enhance sensitivity by stabilizing the QD-enzyme interface and promote electron transduction, thereby enhancing the overall sensing sensitivity. With this architecture, the GSEs exhibit excellent sensitivity and selectivity, achieving limits of detection (LODs) down to 3.27, 8.58, 27.7, and 51 ppb, even in mixed-gas environments. Multiscale simulations reveal the recognition mechanisms, and an equivalent circuit model guides sensitivity modulation. This biomimetic strategy advances artificial olfactory sensors for applications in medical diagnostics, environmental monitoring, wearables, and robotic olfaction. Download: Download high-res image (165KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 47
·期 1
·118787
·
IF 6.3
Zhenrui Zhang,Wei Wang,Hairong Mao,Hongze Ruan,Lei Liang,Wenjia Song
In marine gas turbines, yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) experience severe degradation due to the combined presence of CMAS (CaO-MgO-Al 2 O 3 -SiO 2 ) deposits and sea salt. This study investigates the synergistic corrosion behavior of NaCl and CMAS on YSZ at 1300 °C. Results demonstrate that high-temperature Na + /Ca 2+ ion exchange elevates the local Ca/Si ratio, promoting Ca 3 ZrSi 2 O 9 formation and calcium diffusion into ZrO 2 grains. This process stabilizes the cubic phase and fundamentally shifts the corrosion pathway from standard dissolution-reprecipitation to accelerated grain boundary penetration. Corrosion tests reveal that a 50 wt% NaCl and 50 wt% CMAS mixture exhibits the highest aggressiveness, resulting in a penetration depth of 56.25 μm in 8YSZ after 10 h. These findings identify a salt-accelerated CMAS degradation mechanism driven by rapid ion exchange, offering critical insights for designing next-generation corrosion-resistant marine TBCs.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）