Small
·
2025
·
IF 12.1
Jichun Li,Yu Deng,Luyang Liu,Yidan Chen,Fengluan Jiang,Meihua Chen,Jianfeng Xia,Yonghui Deng
Flexible gas sensing devices have attracted a growing research interest in recent years due to their potential applications in various fields such as wearable electronics. Porous 2D metal oxide semiconductors (2D MOSs) with superior electrical and catalytic characteristics are deemed as promising materials for flexible gas sensors, especially for low-concentration gas detection; however, the synthesis of high-quality 2D MOSs remains challenging. In this study, 2D porous In 2 O 3 nanosheets with a high specific surface area (85.9 m 2 /g) and a thickness of 4.0 nm are synthesized via a scalable micro-explosion assisted caramelization reaction. The synthesis parameters affecting the formation of 2D porous metal oxide nanostructures are systematically studied, and a proposed growth mechanism is dominated by generating the sacrificial 2D carbon intermediate templates. Furthermore, flexible gas sensors are fabricated by depositing 2D porous In 2 O 3 nanosheets on polyimide substrates, which exhibit outstanding sensing performance with high sensitivity toward trace hydrogen sulfide (response value of 17.3 for 250 ppb) at 37 °C, excellent selectivity, and high stability. The sensor is further integrated into a wearable, flexible wireless sensing device, showing good reliability and great potential in detecting trace hydrogen sulfide in practical applications.
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Zhuoqi Li,Peng Song,Zhongxi Yang,Qi Wang
In situ diffusion growth of CoMoO 4 nanoparticles on the surface of MoO 3 nanobelts was achieved through a facile method. The microstructures, morphologies, and chemical composition of the nanocomposites were investigated based on X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy , energy dispersive spectroscopy, and X-ray photoelectron spectra. The characterization results confirmed CoMoO 4 nanoparticles uniformly distributed on the surface of the MoO 3 nanobelts. The trimethylamine sensing properties of pristine MoO 3 and CoMoO 4 /MoO 3 nanocomposites were investigated using a static system. The experimental results revealed that heterojunction structure of CoMoO 4 /MoO 3 nanocomposites displayed low working temperature and enhanced sensing performance. The response of CoMoO 4 /MoO 3 nanocomposites to 100 ppm trimethylamine was ∼104.8 at 220 °C, which was four times higher than that of pure MoO 3 at 280 °C. The reason for the enhanced sensing properties of CoMoO 4 /MoO 3 nanocomposites is attributed mainly to the formation of the p–n junction between the p-type CoMoO 4 nanoparticles and the n-type MoO 3 nanobelts.
研究领域:
材料科学
·
传感技术
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DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Haixia Wu,Quanfa Zhao,Wang Shen,Xiao Han,Bin Zheng,Ruoyu Liu,Shaohua Lin
In recent years, non-thermal plasma technology as an advanced oxidation process has received increasing attention for wastewater treatment . In previous studies, the discussion about the effects caused by different metal electrodes in the plasma treatment system is limited. In this work, phenol degradation efficiency and H 2 O 2 formation with Al, Ti, Fe, Ni, Cu, W, and Mo electrodes were investigated. The use of Fe, Ni, and Al electrodes results in higher phenol removal, than that using W, Cu, Mo, and Ti electrodes. After 70 min of discharge treatment, phenol was continuously decomposed in the solution in the Fe, Cu, and Mo electrodes systems. High peak voltage promoted phenol degradation and H 2 O 2 generation, especially for Fe, Ti and Ni electrodes. The alkaline condition is more conducive to phenol degradation than the neutral and acidic conditions regardless of the electrode type. Fe, Al, Cu, and Ni electrodes are affected more by the adjustment of the conductivity with Cl − than that with SO 4 2− . The dominant influence on H 2 O 2 production and decomposition could be attributed to the catalysis of metal particles and metal ions produced by electrode erosion. According to the radical quenching experiments, the main radicals in the degradation of phenol when using each electrode material were analyzed.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xin Dong,Xiaoli Cheng,Xianfa Zhang,Lili Sui,Yingming Xu,Shan Gao,Hui Zhao,Lihua Huo
The coral-shaped Dy 2 O 3 was prepared by a simple and environmentally friendly hydrothermal reaction combined with subsequent calcination. The coral-shaped Dy 2 O 3 was assembled by clusters, which were constructed by nanoparticles, whose sizes are 12.3 ± 3.6 nm. The gas sensors were investigated with nine gases at room temperature, and show a high response and selectivity to NH 3 . Compared with other reported metal oxide-based sensors, Dy 2 O 3 sensor exhibits not only high sensitivity, good selectivity and reproducibility to NH 3 at room temperature, but also two good linear relationships when the concentration of NH 3 is in the range of 0.1–1 ppm and 1–100 ppm. The good gas sensing property is mainly because of the 3D hierarchical structure of coral-like Dy 2 O 3 , which has a large specific surface area. This benefits NH 3 molecules to adsorb/desorb onto/from the surface as well as the electron transfer. In addition, the possible NH 3 -sensing mechanism is discussed in detail.
研究领域:
材料科学
·
环境科学
·
化学
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 4
·1517
·
IF 3.4
Deqi Zhang,Shenghui Guo,Jiyun Gao,Li Yang,Ye Zhu,Yanjia Ma,Ming Hou
In this paper, with the help of the method of composite materials science, parallel synthesis and high-throughput screening were used to prepare gas sensors with different molar ratios of rare earths and precious metals modified In2O3, which could be used to monitor and warn the early leakage of gasoline and diesel. Through high-throughput screening, it is found that the effect of rare earth metal modification on gas sensitivity improvement is better than other metals, especially 0.5 mol% Gd modified In2O3(Gd0.5In) gas sensor has a high response to 100 ppm gasoline (Ra/Rg= 6.1) and diesel (Ra/Rg= 5) volatiles at 250 °C. Compared with the existing literature, the sensor has low detection concentration and suitable stability. This is mainly due to the alteration of surface chemisorption oxygen caused by the catalysis and modification of rare earth itself.Keywords:high-throughput screening;surface modification;In2O3;gas sensor;fuel volatiles
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
BRITISH JOURNAL OF DERMATOLOGY
·
2017
·Vol. 176
·期 3
·713-722
·
IF 4.706
Kang H.,Li X.,Zhou Q.,Quan C.,Xue F.,Zheng J.,Yu Y.
BackgroundRecent studies have shown that dysregulated metabolic pathways are linked to psoriasis pathogenesis. However, an extensive, unbiased metabolic analysis in patients with psoriasis has not been completely explored. The metabolome represents the end products of proteomics or cellular processes that may be closely associated with the pathogenesis of psoriasis.ObjectivesTo determine the differences in serum metabolomic profiles among patients with psoriasis and healthy controls with the goal of identifying potential biomarkers in patients with psoriasis.Materials and methodsSerum metabolomic profiles from 29 subjects (14 patients with psoriasis and 15 sex‐ and age‐matched healthy controls). The serum metabolites were analysed by gas chromatography‐mass spectrometry based on a combined full scan and selected‐ion monitoring mode.ResultsMultivariate statistical analysis of metabolomics data revealed altered serum metabolites between the patients with psoriasis and healthy individuals. Compared with healthy individuals, patients with psoriasis had higher levels of amino acids including asparagine, aspartic acid, isoleucine, phenylalanine, ornithine and proline; higher levels of lactic acid and urea; and lower levels of crotonic acid, azelaic acid, ethanolamine and cholesterol.ConclusionsIt appears that the glycolysis pathway and amino acid metabolic activity are increased in patients with psoriasis. These metabolic perturbations may stem from increased demand for protein biosynthesis and keratinocyte hyperproliferation. Our findings may help to elucidate the pathogenesis of psoriasis and provide insights into early diagnosis and therapeutic intervention.
研究领域:
皮肤病学
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代谢组学
·
医学
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DOI
PubMed
高影响因子
Current Pharmaceutical Analysis
·
2021
·Vol. 17
·期 7
·873-884
·
IF 0.89
Xia Yun-Yan,Zou Qiao-Gen,Yang Yu-Fei,Sun Qian,Han Cheng-Qun
Background: High-Performance Liquid Chromatography (HPLC) method has been used to detect related impurities of perampanel. However, the detection of impurities is incomplete, and the limits of quantification and detection are high. A sensitive, reliable method is badly needed to be
developed and applied for impurity detection of perampanel bulk drug. Objective: Methodologies utilising HPLC and Gas Chromatography (GC) were established and validated for quantitative determination of perampanel and its related impurities (a total of 10 impurities including 2 genotoxic
impurities). Methods: The separation was achieved on a Dikma Diamonsil C18 column (250 mm 4.6 mm, 5 μm) with the mobile phase of 0.01 mol/L potassium dihydrogen phosphate solution (A) and acetonitrile (B) in gradient elution mode. The compound 2-bromopropane was determined on an Agilent
DB-624 column (0.32 mm 30 m, 1.8 μm) by electron capture detector (μ-ECD) with split injection ratio of 1:5 and proper gradient temperature program. Results: Both HPLC and GC methods were established and validated to be sensitive, accurate and robust according to the International
Council for Harmonization (ICH) guidelines. The methods developed were linear in the selected concentration range (R2≥0.9944). The average recovery of all impurities was between 92.6% and 103.3%. The possible production mechanism of impurities during the synthesis
and degradation processes of perampanel bulk drug was also discussed. Five impurities were analyzed by liquid chromatography–mass spectrometry (LC-MS). Moreover, two of them were simultaneously characterized by LC-MS, IR and NMR. Conclusion: The HPLC and GC methods were developed
and optimized, which could be applied for quantitative detection of the impurities, and further stability study of perampanel.
研究领域:
药物分析
·
分析化学
·
药学
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 2
·877
·
IF 4.6
Xuan Chen,Siyu Fang,Ping Xue,Jiming Huang,Mi Tang,Zhengbang Wang
The development of tunable molecule separation membranes requires materials with remote controllability and ultra-high separation capability. In this paper, a novel photoswitchable metal organic framework (MOF) thin film (Cu2(AzoBPDC)2) was prepared by liquid phase epitaxial layer-by-layer assembly to realize the reversible remote-controlled switching. The azobenzene side groups in the Cu2(AzoBPDC)2thin film showed excellent reversible photoswitching performance under UV (365 nm) and Vis (450 nm) irradiation, achieving the remote-controlled mode of the diffusion flux of polar gas molecules in the MOF thin film.Keywords:metal–organic frameworks;azobenzene;photoswitchable;gas separation
研究领域:
材料科学
·
化学工程
·
光化学
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Fanpu Meng,Jinyong Hu,Can Liu,Yuming Tan,Yong Zhang
In this work, the gas sensors based on LnFeO 3 nanocrystallines with different lanthanide (Ln = Yb, Tm, and Er) are fabricated to investigate the effect of lanthanide on acetone sensing performances. The experimental results revealed that the gas sensor based on YbFeO 3 nanocrystallines exhibited the best response ability and selectivity toward acetone gas. The YbFeO 3 gas sensor exhibits rapid response/recovery characteristic (18/25 s, 10 ppm acetone), and the detection limit can reach to be 500 ppb. The enhanced gas-sensing performance of YbFeO 3 based sensor is mainly contributed to the lanthanide with low binding energy of the Ln O bond.
研究领域:
材料科学
·
纳米技术
·
传感器与执行器
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Xin-Yue Wang,Yi-Ming Gu,Xu-Peng Zong,Sheng-Sheng Zhao,Shu-Dong Wang
The inevitable combustion of fossil fuels in human industrial activities results in significant greenhouse gas emissions, leading to the pressing challenge of CO 2 /N 2 separation in humid flue gas. Iron-based Metal-organic frameworks (MOFs) have proven to be cheap, robust against water vapor attack due to the enhanced coordination bonds. In this study, we present two distinct MOFs i.e., DNL-9(Fe) and PCN-233(FeM II ), constructed by Fe clusters and 2,5-furandicarboxylic acid ligands. Static adsorption experiments revealed that DNL-9(Fe), featuring an exclusive Fe-F-Fe spiral packing structure, exhibited higher surface areas and enhanced CO 2 adsorption performance that outcompeted PCN-233 candidates. DNL-9(Fe) demonstrated a high IAST selectivity of CO 2 /N 2 at 247 (15/85, v/v, P/P 0 = 0.01), superior to the most of state-of-the-art Fe-MOFs reported up to date. The further theoretical calculations elucidated the binding sites of the framework with CO 2 molecules. Importantly, DNL-9(Fe) showed sufficient water stability and cyclic separation, as confirmed by dynamic breakthrough tests, indicating it as a promising candidate for practical CO 2 capture from humid flue gas.
研究领域:
化学
·
材料科学
·
环境科学
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DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Jiaxu Li,Songlin Wang,Lei Lai,Pingwei Liu,Haiqiang Wu,Jinlong Xu,Steven J. Severtson,Wen-Jun Wang
There is currently great interest in biodegradable alternatives for packaging and agricultural applications. The most viable biodegradable alternative, poly (butylene adipate-co-terephthalate) (PBAT), has poor resistance to water vapor and oxygen permeation and tends to degrade rapidly under solar exposure. Herein, we report a preparation of PBAT nanocomposite films with aligned graphene nanosheets both in and on the films by combining two techniques, biaxial orientation and rod scarping. The composite films with a graphene content of 0.48 vol% exhibited 80% decrease of water vapor permeability and over 99% decrease of oxygen permeability , approaching values of 1.0 × 10 −11 g m m −2 ·Pa −1 s −1 and 6.2 × 10 −16 cm 3 cm cm −2 ·Pa −1 s −1 . These values are respectively comparable to and even lower than the reported 9.9 × 10 −12 g m m −2 ·Pa −1 s −1 and 8.0 × 10 −15 cm 3 cm cm −2 ·Pa −1 s −1 for polyethylene films. After a 200 h aging, the composite films still possessed a fracture strength of 47.3 MPa and an elongation at break of 167%, in contrast to a complete fragmentation of pure PBAT. We believe that the controlled incorporation of aligned graphene nanosheets to biodegradable polymers could become an important strategy to develop sustainable packaging and agricultural films.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 3
·719
·
IF 3.426
Zhiqiang Tan,Huimin Su,Yiwen Guo,Huan Liu,Bo Liao,Abid Muhammad Amin,Qingquan Liu
Conjugated microporous polymers (CMPs) have conjugated skeleton and permanent porosity, and exhibit huge potential in developing novel functional materials for resolving the challenging energy and environment issues. Metal-containing CMPs often exhibited unique properties. In the present manuscript, ferrocene-based conjugated microporous polymers (FcCMPs) were designed and synthesized with 1,1′-dibromoferrocene and 5,10,15,20-Tetrakis(4- bromophenyl) porphyrin (FcCMP-1) or Tetra (p-bromophenyl) methane (FcCMP-2) as building units via Yamamoto coupling. FcCMPs were amorphous, and exhibited excellent thermal and physicochemical stability. The BET surface area of FcCMP-1 and FcCMP-2 was 638 m2/g and 422 m2/g, respectively. In comparison with FcCMP-2, FcCMP-1 displayed better gas storage capacity due to higher porosity. FcCMPs were also used as an adsorbent for removal of methyl violet from aqueous solution, and exhibited excellent adsorption properties due to the interaction between electron-rich conjugated structure of the polymers and methyl violet with cationic groups. Moreover, FcCMPs could be extracted and regenerated by an eluent and then re-used for high efficient removal of methyl violet.Keywords:conjugated microporous polymers (CMPs);ferrocene;gas adsorption;dye removal
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）