ADVANCED MATERIALS
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2020
·Vol. 32
·期 22
·1907701
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IF 27.398
Bo Wang,Zhihua Qiao,Jiayou Xu,Jixiao Wang,Xinlei Liu,Song Zhao,Zhi Wang,Michael D. Guiver
Ultrathin unobstructed gas transport channels through the membrane selective layer are constructed in mixed matrix membranes (MMMs) by using gravity-induced interface self-assembly of poly(vinylamine) and polymer-modified MIL-101(Cr). For CO 2 /N 2 (15/85 by volume) mixed gas, the MMMs achieve a high CO 2 permeance of 823 gas permeation units and CO 2 /N 2 selectivity of 242 at 0.5 MPa. Based on economic analyses, a two-stage membrane process can achieve gas separation and economic targets.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-11
·
IF 5.3
Zhao Zhihua,Yao Longqi,Zhang Shuaiwen,Shi Qingsheng,Rahmatullah Abu Bakker Md,Wu Lan
Industrialization and agricultural demand have both improved human life and led to environmental contamination. Especially the discharge of a lot of poisonous and harmful gases, including ammonia, ammonia pollution has become a pressing problem. High concentrations of ammonia can pose significant threats to both the environment and human health. Therefore, accurate monitoring and detection of ammonia gas are crucial. To address this challenge, we have developed an ammonia gas sensor using In(OH) 3 /Ti 3 C 2 T x nanocomposites through an in-situ electrostatic self-assembly process. This sensor was thoroughly characterized using advanced techniques like XRD, XPS, BET, and TEM. In our tests, the I/M-2 sensor exhibited remarkable performance, achieving a 16.8% response to 100 ppm NH 3 at room temperature, which is a 3.5-fold improvement over the pure Ti 3 C 2 T x MXene sensor. Moreover, it provides swift response time (20 s), high response to low NH 3 concentrations (≤ 10 ppm), and excellent long-term stability (30 days). These exceptional characteristics indicate the immense potential of our In(OH) 3 /Ti 3 C 2 T x gas sensor in ammonia detection. Graphical Abstract
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhiwei Wang,Xiang Zhao,Fangzhen Hong,Hao Wang,Heng Lei,Zhiming Chou,Jiandong Zheng
The development of room-temperature (RT) formaldehyde sensors is significant for indoor air quality monitoring. In this contribution, titanium (Ti)-incorporated 1T/2H molybdenum disulfide (MoS2) phase heterostructures were prepared via a facile hydrothermal method. Compared with 1T/2H MoS2, the as-prepared 1T/2H Mo1–xTixS2 nanosheets showed a boosted RT formaldehyde sensing performance, which was attributed to the enhanced gas adsorption and charge transfer processes induced by Ti incorporation and could be regulated by tuning the Mo/Ti ratio in Mo1–xTixS2. In addition, the Ti-incorporated phase heterostructures with an optimized 1T concentration showed further improved gas-sensing properties compared to the highly metallic or semiconducting nanosheets with the same chemical composition, which exhibited an obvious response of 0.035% to 1 ppm formaldehyde with an excellent limit of detection as low as 39 ppb, good repeatability, and short response and recovery times. Moreover, flexible gas sensors based on the optimized nanosheets showed well-maintained responses under moderately bent conditions. Our findings demonstrate that the creation of phase heterostructures with tunable compositions and phases may provide more opportunities to tailor their sensing properties.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liting Pan,Shijie Yu,Zemin Chen,Yina Jiang,Yunmao Zhang,Jing Liu,Xu Hou
Liquid gates, which combine the characteristics of both solid and liquid materials, possess unique advantages of reconfigurable interfaces, dynamic responsiveness, and adaptability, demonstrating great promise for various practical applications. Currently, a major challenge for liquid gates is the observation of their switching behavior in real-time and in situ, which directly limits the applicability across various scenarios. Here, a magneto-responsive photonic liquid gate is developed to enable instantaneous, in situ monitoring of gas transport switching threshold through dynamic structural color changes. By leveraging particle reconfiguration within confined magnetic colloidal suspensions, both the interfacial mechanical properties and diffracted light are simultaneously tuned by the magnetic field, creating a direct correspondence between the gas transport switching thresholds and the observable color state of liquid gates. This visual system features responsive changes in both appearance and functionality, enabling real-time modulation of gas release to be perceived with the naked eye. Furthermore, this material strategy, characterized by direct recognition, rapid predictability, and straightforward manipulation, opens new opportunities for visual chemical detection, dynamic fluid control, and multifunctional integrated systems.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Liwei Zhang,Jinmei Tian,Yuting Wang,Tianqi Wang,Meijie Wei,Feng Li,Dan Li,Ying Yang,Hui Yu,Xiangting Dong
Polyoxometalates (POMs), as a kind of electron acceptors , comes into sight in gas sensing field. Here, we in situ construct a group of polyoxomethoate/semiconductor one-dimensional tandem heterojunction materials using convenient one-step coaxial electrospinning method . A polyoxometalates electron acceptor layer was intercalated into In 2 O 3 @SnO 2 nanofibers (NFs), forming In 2 O 3 @PW 12 @SnO 2 coaxial core-middle-shell NFs. Gas sensing performances of the one-dimensional In 2 O 3 @PW 12 @SnO 2 tandem heterojunctions were investigated for the first time. The fabricated NFs exhibited excellent detection performances for ethanol gas. The optimal sensitivity response to 100 ppm ethanol can reach 22.6, which is about 4 times that of POMs-free samples. Other gas sensing parameters were also comprehensively studied. The significant enhancement can be attributed to the addition of appropriate amount of PW 12 electron acceptor which accelerate electrons transfer and reduce the recombination of electron-hole pairs. This work provides a novel strategy for developing high performance gas sensors by constructing tandem heterojunctions as well as introducing POMs electron acceptor, and offers new insight into the development of POMs-based gas sensors.
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FOOD RESEARCH INTERNATIONAL
·
2021
·
IF 6.475
Dong-Yu Shen,Huan-Lu Song,Ting-Ting Zou,Su-Yan Wan,Meng-Ke Li
The leaf of moso bamboo ( Phyllostachys pubescens Mazel ) is rich in odorant compounds, which is important natural materials for the production of flavor. It also contains phenolic acids, amino acids and peptides, which is a potential source of natural bioactive compounds. The study of odor-active compounds in bamboo leaves can provide a basis for the discovery of natural flavor. The leaf, stem, and powder of moso bamboo were analyzed by gas chromatography-ion mobility spectrometry (GC-IMS). Main odor-active compounds in moso bamboo leaf were analyzed and characterized by (1) a gas chromatography olfactory mass spectrometry (GC-O-MS), (2) two-dimensional gas chromatography olfactory mass spectrometry (GC × GC-O-MS) and (3) electronic nose (E-nose). Based on aroma extract dilution analysis (AEDA), 13 key odor-active compounds with high flavor dilution (FD) factor (≥27), including 3-methyl-1-butanol, ( E )-2-hexenal, ethyl hexanoate, ( Z )-4-heptenenal, 6-methyl-5-hepten-2-one, octanal, ethyl ( Z )-3-hexenoate, 1-hexanol, ( Z )-3-hexen-1-ol, ( E, E )-2,4-heptadienal, ( Z )-2-hexen-1-ol, 1-octen-3-ol and benzaldehyde, were further analyzed. The compounds detected by the above four methods were ( E )-2-hexenal, 6-methyl-5-hepten-2-one, octanal, ( E, E )-2,4-heptadienal, 1-octen-3-ol and benzaldehyde, and all of which were the main and potential odorants of moso bamboo leaf.
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Food Bioscience
·
2023
·
IF 5.2
Wenjun Rao,Xin Li,Linhua Ouyang,Shuilan Zhu,Shuai Hu,Jinying Zhou
Rice flavor baijiu is one of the four traditional Chinese liquors, but the flavor difference caused by rice raw materials has received little attention. In this study, gas chromatography-ion mobility spectrometry (GC-IMS) combined with gas chromatography-olfactometry-quadrupole time of flight mass spectrometry (GC-O-QTOF/MS) were used to analyze five Rice flavor baijiu brewed from different rice raw materials. The results showed that there was a significant difference in the number and content of aroma compounds between the baijiu made from japonica rice and indica rice, and a total of 34 volatiles were characterized by the GC-IMS technique, which effectively constructed the fingerprint profile of the flavor differences of Rice flavor baijiu. GC-O-QTOF combined with aromatic extract dilution analysis (AEDA) tests identified 42 characteristic aroma active regions, 34 of which could be identified and quantified by the internal standard method. Sixteen aroma-active compounds in five baijiu samples showed high odor activity values (OAV). In addition, multivariate statistical analyses such as principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) effectively revealed the distribution patterns of the samples and their separation of relevant aroma activity markers. Six key aroma compounds, including isopentyl acetate, ethyl hexanoate, benzeneacetaldehyde, phenethyl acetate, undecane-2-one, and ethyl decanoate, were screened to have a greater effect on the flavor of Rice flavor baijiu.
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ANALYTICAL LETTERS
·
2023
·
IF 2
Lijun Ni,Qingmei Lu,Huanyao Hou,Liguo Zhang,Shaorong Luan
The volatile components of honeysuckle were determined using hydro-distillation (HD), water extraction coupling rectification (WER), and water extraction coupling rectification with solvent extraction (WER-SE). Gas chromatography–mass spectrometry (GC–MS) and headspace solid-phase microextraction–gas chromatography–mass spectrometry (HS-SPME/GC–MS) identified 127 compounds. There were 27 common compounds extracted by these methods. A heatmap of the 27 common compounds indicates that WER-SE and WER were complementary approaches. In addition, 59 compounds were detected for the first time in honeysuckle. The results of this study provide a reference for the determination of volatile components in plants.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Kai Hua,Jiahao He,Xingtong Li,Congyi Zheng,Lingrui Ji,Qingyan Wu,Xi Chen,Ke Gao,Wei Wei,Liping Lu
Liquid crystal monomers (LCMs) are a class of emerging organic pollutants widely used in liquid crystal displays (LCDs) of various electronic products. LCMs can easily be released from LCDs into indoor environments and may pose potential environmental and health risks. Meanwhile, LCMs exhibit a wide range of saturation vapor pressures (PL) and octanol-air partition coefficients (Koa), which enable their presence in various indoor metrices. However, current research on LCMs within indoor multi-medium contexts remains limited. The development of effective analytical methods could significantly advance related research endeavors. This study developed a method using ultrasonic extraction to extract 70 LCMs from dust, gas, and particle samples, and analyzed them using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC × GC-TOF MS). The recoveries of 70 LCMs in dust, gas and particle phases ranged from 77.7 % to 116 %, 73.8 %–127 %, and 62.1 %–147 %, respectively. The instrument's detection limits and quantification limits were 0.01–1.10 ng/mL and 0.04–3.67 ng/mL, respectively. This demonstrated that the method exhibited satisfactory accuracy and sensitivity, and was further applied to analyze 70 LCMs in indoor dust, gas, and particle phases. 52 LCMs were detected in all three matrices, with significant differences in the distribution of these LCMs across the multi-medium. This method is suitable for determining LCMs concentrations in dust, gas, and particle phases, facilitating a more comprehensive analysis of the occurrence levels of indoor LCMs, and providing a technical reference for future studies on the partitioning behavior and risk assessment of LCMs in indoor multi-medium environments, thereby enhancing our understanding of their environmental impact.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chuanruo Yang,Lei Hong,Fan Nie,Wenyuan Qiao,Xiangyu Cui,Taotao Gao,Lin Huang,Ming Xue,Changhui Liu
Waste plastics create environmental burdens due to their persistence, while greenhouse gas emissions exacerbate global warming. This study presents a method to convert waste plastics into nitrogen-doped hyper-cross-linked polystyrene porous polymers. The resulting material exhibited a high specific surface area of 1063.30 m2/g and adsorption capacities of 1.81 mmol/g for CO2 and 2.95 mmol/g for CH4. This work demonstrates aniline’s potential for covalent nitrogen doping to enhance adsorption capacity, providing insights for optimizing greenhouse gas capture and advancing “waste-to-treat-waste” strategies.
研究领域:
环境科学
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材料化学
·
聚合物化学
·
碳捕集与封存
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Nature Communications
·
2025
·
IF 15.7
Du Qinqing,Liu Lingyan,Sun Shengtong,Wu Peiyi
Self-adaptive compliance and gas permeability are crucial properties for on-skin electronics, enabling the reliable extraction of high-fidelity electrophysiological signals for applications in personal healthcare and robotic control. However, integrating these two properties into a single device, particularly under dynamic skin deformations, remains a significant challenge. Here, we present an ultrathin liquid crystal elastomer-based sheath-core ionic nanomesh that synergizes soft elasticity with ionic conductivity to create self-compliant and breathable bioelectronic interfaces. The nanomesh features a hydrophilic sheath and a porous architecture, which ensure high moisture and air permeability for superior wearable comfort. Moreover, the unique liquid-like deformation of liquid crystal directors facilitates nearly stress-free skin-device junctions, promoting fatigue-resistant adhesion against various interfacial failures. Our fabricated electrodes successfully acquire muscle-specific electromyography signals with minimized motion artifacts - a feat challenging for conventional epidermal electrodes. This design resolves the trade-off between self-compliance and permeability, establishing a new paradigm for long-term, reliable wearable electronics.
研究领域:
可穿戴电子学
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生物医学工程
·
柔性机器人
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生物电子学
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材料科学
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yan Nie,Tianwei Chen,Mengqi Tian,Yapeng Zhang,Xiaorong Ruan,Ibrahem O. Baibars,Donghai Wei,Chuan Zhao,Guanhua Zhang
Efficient gas bubble management is critical for enhancing the efficiency of alkaline water electrolysis, where adherent bubbles cause large overpotentials and unstable current densities. While optimizing the electrode structure has proven effective in promoting bubble detachment and improving reaction kinetics, achieving an ordered structure with a clear structure–performance relationship still remains challenging. Herein, a superaerophobic ordered 3D honeycomb Ni micromesh (3D HNM) integrated with NiCoP catalysts (3D HNM@NCP) is developed to address this challenge. By photolithography and the electrodeposition process, the hierarchical electrode is composed of a conductive Ni micromesh and Ni nanopyramids, which produces a discontinuous triple-phase contact line to minimize bubble adhesion. Operando high-speed imaging and finite element simulations reveal that the superaerophobic surface reduces bubble detachment size to ∼100 μm (compared with 150 μm for flat electrodes) and thus accelerates bubble release. As a result, the 3D HNM@NCP electrode exhibits an overpotential of 134 mV and demonstrates outstanding durability for over 60 h at 100 mA cm–2 for the hydrogen evolution reaction. The overall water electrolysis enables over 24 h of chronopotentiometric steps at current densities up to 400 mA cm–2. This work demonstrates an effective method to promote gas bubble removal with a 3D ordered structure with superaerophobic property for alkaline water electrolysis.
研究领域:
电化学
·
可再生能源
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材料科学
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氢气生产
·
水电解
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