NANOTECHNOLOGY
·
2017
·Vol. 28
·期 47
·475602
·
IF 3.44
Jiheng Ding,Hongran Zhao,Qiaolei Wang,Wanjun Peng,Haibin Yu
Due to their high thermal conductivity and insulation performance, boron nitride nanosheets (BNNS) have great promise to fabricate thermal management equipment for application in power electronics. The liquid-phase exfoliation route has been regarded as the most commonly used approach to produce single and few-layered BNNS for many research fields. However, this process takes a long time, and the production yield is extremely low. In this work, an efficient technique to obtain few-layered (mostly < 5 layers), high-yield (∼33%), and plane-defect-free BNNS by the combination of liquid N2 (L-N2) gasification and liquid exfoliation was developed. The as-obtained BNNS suspensions could be vacuum filtered to make a thermal conductive film named a BNNS heat spreader which possessed a superior thermal conductivity of 61.2 W m−1 K−1 at room temperature. In addition, we also proved that the thermal conductivity of the BNNS heat spreader increased with the increase of density, creating an approach for fine tuning the thermal property of this heat spreader.
研究领域:
材料科学
·
热物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 4
·1-11
·
IF 2.426
Hou Lei,Wang Zhe,Xu Jingmei,Chen Wenbo,Yang Cancan,Wang Yuanyuan
Mixed matrix membranes (MMMs) were fabricated by incorporating carboxylated multi-walled carbon nanotubes (MWCNTs) into a poly (arylene fluorene ether ketone) that contained amino groups (Am-PAFEK) matrix to improve CO 2 separation performance. The combination of MWCNTs and Am-PAFEK exerted a favorable synergistic effect on the permeability and selectivity of membranes. The extraordinary smooth wall of MWCNTs acts as a highway through which gas passes, providing better permeability. The Am-PAFEK matrix itself has a dense internal structure that provides high gas selectivity. MWCNTs particles evenly distributed among the Am-PAFEK membrane due to the non-covalent bond interaction between the amino and carboxyl group. Efficient CO 2 transport pathways were constructed by homogeneous dispersion of MWCNTs with in MMMs, leading to maintained good selectivity and enhanced permeability. When the amount of carbon nanotubes added was 3 wt.%, that increased by above 60% in comparison to the Am-PAFEK membrane permeability, the CO 2 /CH 4 and CO 2 /N 2 selectivity of the Am-PAFEK/MWCNTs-3% membrane achieved 35.02 and 30.09, respectively. Therefore, the strategy of blending MWCNTs with Am-PAFEK exhibited a promising approach for improving gas permeability.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 23
·18507-18521
·
IF 2.779
Zheng Zichen,Li Ying,Luo Yifan,Debliquy Marc,Zhang Chao
Breath gas detection has attracted significant attention for the early screening of lung cancer. In this paper, we synthesized bismuth ferrite (BiFeO 3 ) nanoparticles via a green and facile microwave hydrothermal method for detecting low concentration isopropanol. The influence of material’s synthesis process parameters, including temperature, time and power of synthesis on the physicochemical properties, has been explored. The structure, morphology and other material properties of BiFeO 3 were analyzed by a series of characterization methods such as scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray electron spectroscopy (XPS). The effects of synthesis process parameters and testing conditions on gas sensing performance were investigated by a four-channel testing chamber. In addition, the mechanism of gas-sensitive response was also discussed. Considering the authentic situation of exhaled breath of human, we conducted the experiment of ultralow concentration and high humidity systematically. Typically, the BiFeO 3 gas sensor revealed extraordinary sensitive performance at an optimal working temperature of 275 °C. An excellent linear relationship existed in the response and gas concentration, as the response value can reach 3.9 towards 1 ppm isopropanol even if it is in a 100% relative humidity (RH) atmosphere.
研究领域:
材料科学
·
医学检测
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Minggang Zhang,Mingyang Lu,Haixi Pan,Haili Bai,Hui Mei,Laifei Cheng
Facet engineering is a surface optimization strategy to improve the physical and chemical properties of metal oxide semiconductors. To exploit a facile method to fabricate high-performance ethanol sensing material and study the sensing mechanism, a quasi-cubic α-Fe 2 O 3 was investigated, which with high-energy facets exposed. Cetyl trimethyl ammonium bromide (CTAB) surfactant was employed in the preparation of α-Fe 2 O 3 to control the shape and size. The resulting Fe 2 O 3 particles exhibited a mean size of 1.10 µm with high uniformity in size and shape. Additionally, the cubic structure can also optimize the electronic transmission path. Charge carriers are conducting between the cubes required to pass through the electron depletion layer on the surface, as the Fe 2 O 3 particles are separated. Thus, the resistance change of the electron depletion layer significantly affected the overall conductivity . The DFT calculation also confirmed that the exposed facets had high adsorption energy to ethanol molecules, which validated the experimental results. The resulting α-Fe 2 O 3 exhibited an excellent selectivity towards ethanol vapor with a response of 35.14–500 ppm ethanol gas, and the response and recovery times were 12 s and 41 s, respectively. Additionally, the sensing materials exhibited good long-term stability which maintained 92% of its initial response after 60 days, potential using in practical ethanol gas detection.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
气体传感
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Hairui Fang,Hong Chen,Feng Zhang,Rong Tan,Chenshuai Han,Xin Ai,Xiao Ma,Yiwen Cui,Dong Wang
Sulfur hexafluoride (SF 6 ) from Gas Insulated Switchgear (GIS) will decompose and produce hydrogen sulfide (H 2 S) in the event of equipment failure. Therefore, the detection of H 2 S can determine whether the equipment has malfunctioned. Due to the low concentration of the SF 6 decomposition product H 2 S and its application in industrial environments, sensors must have a low detection limit and rapid response time . Considering that the oxides of rare earth elements can improve the sensing characteristics, praseodymium oxide (Pr 6 O 11 )-indium oxide (In 2 O 3 ) was prepared. The impact of Pr 6 O 11 doping on In 2 O 3 was investigated through characterization methods. To validate its feasibility for use in GIS, the best sensor (F3) exhibits good sensing characteristics for H 2 S in the SF 6 and air ambient. The responses to 10 parts per million (ppm) H 2 S at 190°C were 146.6 in SF 6 and 190.8 in air. In SF 6 ambient, the F3 sensor demonstrated a low detection limit (50 parts per billion (ppb)). The good sensing characteristics are attributed to the doping of rare earth elements, which induces an increase in the proportion of defect oxygen and accelerate the chemical reaction. The sensing characteristics of the material can be attributed to the doping of Pr 6 O 11 and the electronic effect. This study provides a novel approach for detecting H 2 S generated from SF 6 decomposition.
研究领域:
材料科学
·
电气工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Qin Yao,Meiling Liang,Kunling Yang,Cheng Qi,Tiantian Kong,Bernard P. Binks,Zhou Liu
Motivated by gas-accessible thin liquid films in lung alveoli, we develop gas marble-film reactors in which particle-stabilized bubbles confine an ultrathin freestanding liquid film within a jammed solid shell. Hexagonal PET (poly(ethylene terephthalate)) plates, in addition to conventional spherical particles, generate faceted gas marbles with planar film regions that improve optical access. We quantify the pressure limits of microsphere- and plate-stabilized shells during inflation and deflation, and describe their response using a capillary–granular framework. In this framework, inflation rupture is governed by capillary breakthrough at particle-defined throats, whereas deflation collapse reflects the combined resistance of capillarity and interparticle jamming. The mechanically defined films then serve as gas-accessible interfacial reactors in two proof-of-concept demonstrations. In a Tollens reaction, aerosolized glucose delivery through the external gas phase localizes silver reduction to liquid-wetted regions of the particle shell, producing spatially patterned silver-deposited microspheres. In biological assays, plate-stabilized shells provide flat observation windows for monitoring aerobic E. coli growth and its inhibition by levofloxacin. These results establish gas marbles as programmable colloidal film reactors whose structure, pressure stability, and interfacial function can be coupled through particle geometry and capillary jamming. Download: Download high-res image (101KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Jiaxin He,Zhihao Liu,Shizheng Song,Shuo Liu,Ruibao Wu,Zongyao Zhou,Sheng Zhou
Mixed-matrix membranes (MMMs) offer a promising route to efficient gas separation by synergizing the superior transport properties and stability of porous fillers with the scalability of polymeric matrix. However, fabricating ultrathin, high-loading MMMs remains a significant challenge, as conventional solution processing inevitably leads to filler agglomeration. Here, we report a decoupled assembly strategy to fabricate ultrathin, highly loaded MMMs by separating membrane formation into two distinct stages: filler monolayer assembly and subsequent matrix electropolymerization. This approach enables the formation of ordered, close-packed nanoparticle monolayers, facilitating the attainment of ultra-high filler loadings (>60 wt%) in the final membrane. Using metal-organic frameworks (MOF-801 and MOF-808) as fillers and a conjugated microporous polymer (CMP) as the matrix, we constructed robust MMMs with thicknesses of 390 nm and 550 nm, respectively. Applied to CO 2 /CH 4 separation, the resulting membranes exhibited a 12-fold increase in CO 2 permeance (from 26 to 313 GPU) and a 120% enhancement in selectivity compared to the pristine polymer matrix.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Rui Wang,Lili Lv,Xiangsheng Han,Minghao Mu,Xiaochen Wu,Zehui Li,Xihui Zhao,Mingjie Li,Chaoxu Li
A one-step, efficient alkali hydrolysis method was established to mildly exfoliate silk nanofibrils (SNFs) from natural silkworm cocoons on a large scale. The as-prepared SNFs showed an excellent dispersity and stability in various solvents. Two kinds of SNF membranes (i.e., mesoporous and nanoporous membranes) with controlled pore structures were fabricated and functioned for selective interception and protection properties, respectively. The SNF mesoporous membranes were efficient as rejection membranes, while the SNF nanoporous membranes revealed relatively high gas-barrier properties. This work offers a facile and green route for fabricating SNF-based functional-membrane materials and expanding their potential applications in filtration and gas-barrier domains.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 8
·513
·
IF 5.4
Liu Zhikuan,Diao Quan,Shang Xiaonan,Zhu Genxing,Cao Shuai,Shi Guangyuan,Jiao Mingli
Prussian blue analogs (PBA) were etched with a weak base and subsequently sulfurized to regulate the oxygen vacancy content, leading to the preparation of defect-rich spinel bimetallic oxide NiFe 2 O 4 . This approach successfully constructed a gas sensor with high response and excellent stability, and the material was systematically characterized. The results show that weak base etching regulates the morphology of PBA, and sulfur doping is employed to control the oxygen vacancy content. Gas sensing results confirmed that the modified NiFe 2 O 4 -NCs@S exhibited superior n-butanol gas sensing performance. Specifically, the sensing response of NiFe 2 O 4 -NCs@S to 100 ppm n-butanol at 275 °C reached 59.29, representing a 9.9-fold enhancement compared with NiFe 2 O 4 -PBA (response = 5.98). In addition, comprehensive tests demonstrate that the sensor possesses reliable selectivity, long-term stability and repeatability. To investigate the sensing mechanism, UV–vis spectroscopy and electrochemical characterizations were performed to verify that oxygen vacancies boost gas-sensing properties via band gap narrowing and electronic structure modulation. This work offers a novel strategy for developing high-response n-butanol gas sensors. Graphical
✓ 已验证
产品关联
DOI
高影响因子
MedComm
·
2026
·Vol. 7
·期 6
·e70787
·
IF 14.1
Wenting Liu,Jian Qi,Yajing Chu,Jijuan Zhou,Yue Liu,Li Ke,Xiangxue Zheng,Yan Lu,Dianlong Ge,Yannan Chu,Hongzhi Wang
Lung cancer (LC) is a leading cause of cancer mortality worldwide, frequently complicated by malignant pleural effusion (MPE). This study aimed to investigate volatile organic compounds (VOCs) in pleural effusion to identify metabolic biomarkers for LC. A total of 107 LC-related MPE and 112 benign pleural effusion (BPE) patients were enrolled and divided into discovery (MPE: n = 75; BPE: n = 78) and validation (MPE: n = 32; BPE: n = 34) cohorts. Paired tumor and adjacent nontumor tissues from 14 LC patients formed an independent cohort. Differential VOCs were identified using criteria of q < 0.05, |log 2 fold change| > 1, and VIP > 1.5 in both the pleural effusion discovery cohort and the tissue cohort. Hexanal was identified as the only LC-associated VOC present across both compartments. In the validation cohort, hexanal demonstrated strong diagnostic performance in distinguishing MPE from BPE (AUC = 0.8339; sensitivity 75.00%; specificity 65.71%). Single-cell analysis indicated that hexanal accumulation is linked to fatty acid metabolism reprogramming. This study supports pleural effusion-based gas biopsy as a promising LC diagnostic approach.
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Mengze Zhao,Zhibin Zhang,Cong Wang,Peng Feng,Kuan Yang,Mingchao Ding,Yuheng Jiang,Quanlin Guo,Meng Wang,Muhong Wu,Guangyu Zhang,Xin-Zheng Li,Zhiyong Tang,Ding Ma,Zhipeng Li,Enge Wang,Kaihui Liu
The sustainable use of fossil fuels requires simultaneous efficient utilization of both energy and matter. Traditional fossil fuel processes primarily harvest energy through combustion, leaving much of the matter—especially carbon—unexploited and released in the form of greenhouse gas (carbon dioxide). Here, we develop an atomic lattice separation method using a nickel foam-nickel foil structure to simultaneously extract both energy and matter from natural gas with high efficiency. In this design, hydrogen in natural gas is catalytically converted to hydrogen gas on nickel foam, while carbon is transformed into crystalline graphite via transport through the atomic lattice of nickel foil. This approach achieved efficient (> 99% conversion), stable (≥ 300 h stability), and reusable (≥ 5 cycles) hydrogen gas generation, coupled with the production of high-value graphite with an ultrahigh crystal quality and superior thermal and electrical properties. Further integration with a solid oxide fuel cell system demonstrated an electricity generation efficiency of ∼57%. This strategy establishes a sustainable pathway for separating energy (hydrogen) and matter (graphite) from hydrocarbons, thus providing new opportunities for high-efficiency and zero-emission natural gas utilization.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Lei Wu,Yiqiang Deng,Dayi Guo,Guoshuai Zhang,Tanlai Yu,Xiuling Chen,Nanwen Li
Carbon molecular sieve (CMS) membranes represent a class of high-performance separation materials capable of surpassing the conventional permeability-selectivity trade-off. Introducing fillers into polymer precursors can further enhance the performance of the resulting CMS membranes; however, incompatibility between fillers and the polymer matrix often results in interfacial defects. In this study, the small-molecule cross-linker N,N ′-1,3-phenylenedimaleimide (PDM) was incorporated into a 6FDA-BPDA/TFDB polyimide to prepare optically transparent, uniform, and defect-free PDM-x precursor membranes. These precursor membranes were first subjected to thermal treatment at 300 °C for 1 h to form a semi-interpenetrating polymer network (SIPN) structure, and then pyrolyzed at 550 °C to obtain PDM-x-SIPN CMS membranes. The successful formation of a cross-linked semi-interpenetrating polymer network (SIPN) in the precursor was verified by TGA, ATR-FTIR, and XRD analyses. The resulting PDM-20-SIPN CMS membrane delivered exceptional gas-separation performance, with O 2 and CO 2 permeabilities of 1631 and 9904 Barrer, and O 2 /N 2 and CO 2 /CH 4 selectivities of 6.7 and 67.8, respectively—exceeding the latest upper-bound limits. Furthermore, the membrane showcased outstanding aging resistance over 720 h, significantly outperforming the conventional 6FDA-BPDA/TFDB CMS membrane. This study not only offers a robust precursor-design strategy, but also provides a foundation for the future development of high-performance CMS materials in sustainable separation processes.
✓ 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）