JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Ailin Gao,Huiqin Fan,Guangfa Zhang,Shuai Zhao,Jian Cui,Yehai Yan
Controlling the bubbles' behavior on a solid surface is significant for exploring more related applications and thus recently has attracted increased investigations. Based on this, a Janus poly ( l -lactic acid) (PLLA) membrane with definitely opposite water wettability in air and opposite bubble wettability underwater was successfully fabricated in this work. The obtained Janus membrane exhibited unidirectional transport for air bubble underwater from the superaerophilic side to superaerophobic side, meanwhile prevented the permeation of water medium from both sides under low pressure. This special membrane was designed to couple two chemical reactions. During the designed chemical reaction process, the feature of bubble unidirectional transport allowed the carbon dioxide (CO 2 ) produced in one reaction system to transport through the resultant membrane into another reaction system, wherein it could be consumed. Meanwhile, the anti-water-permeation function of the membrane guaranteed that the two chemical reactions could be performed independently. We believe that the present research could broaden the potential applications of membranes with super-wetting character for gas bubbles.
研究领域:
材料科学
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化学工程
·
界面科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zucheng Cheng,Weiguo Liu,Shaohua Li,Sijia Wang,Yingying Liu,Xiang Sun,Cong Chen,Lanlan Jiang,Yongchen Song
Hydrate technology with high gas storage capacity and excellent safety features has attracted much attention for capturing CO 2 from biogas to produce purified CH 4 . When considering operational efficiency, it is desirable to overcome technical barriers such as slow hydrate generation and low separation efficiency. Therefore, based on the properties of surfactant-enhanced hydrate generation kinetics, this work first systematically evaluated the performance of 500 ppm SDS on the separation efficiency of 40 mol% CO 2 and 60 mol% CH 4 simulated biogas. The experimental results show a significant increase in gas capture at higher driving forces, with the rise being dominated by the CH 4 component, indicating that larger driving forces reduce hydrate selectivity to CO 2 -CH 4 and weaken gas separation efficiency, with a maximum CO 2 recovery of 84.24 ± 1.19% at 275.15 K and 8 MPa. Interestingly, hydrate growth mainly occurred in the liquid phase, leading to the separation factor being positively correlated with the induction time with sufficient CO 2 dissolution. In comparison, the gas capture per unit volume of solution could be improved by more than a factor of 2 at higher gas–liquid ratios. The best separation factor of 7.84 ± 0.73 was achieved, and separation factors in general gradually decreased with increasing gas–liquid ratio; however, there was high-pressure failure behavior. Furthermore, the impact of the defoamer on separation efficiency was deeply investigated for SDS decomposition foaming, with results showing that the defoamer would alleviate hydrate decomposition foaming behaviour while having no significant effect on hydrate generation kinetics and separation efficiency.
研究领域:
能源工程
·
环境科学
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化学工程
·
气体分离技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yubo Wei,Qiang Zeng,Jianzhi Huang,Xinrong Guo,Lulu Wang,Lishi Wang
Novel gas-responsive imprinting hydrogels were fabricated by combining N,N′-dimethylaminoethyl methacrylate gas-sensitive monomers, N,N′-methylenebis(acrylamide) cross-linkers, and human serum albumin (HSA) template proteins via a free radical polymerization. The hydrogel exhibited a reversible gas-responsive property upon N2/CO2 exchange. This result was supported by the evidences from hydrogen nuclear magnetic resonance spectroscopy and scanning electron microscopy. By applying this property to sensing application, a CO2-responsive imprinted biosensor was originally designed on the surface of a glassy carbon electrode. The biosensor exhibited unique self-clean and self-recognition properties toward HSA proteins based on reversible conformational changes driven by N2/CO2 stimuli. Moreover, the proposed imprinted biosensor favored HSA proteins by showing satisfactory sensitivity and selectivity and a wider detection range with a low detection limit. As a rare example in imprint sensing, the biosensor was successfully applied to the HSA extraction from complex serum samples. With gas stimuli, the whole process was efficient, controllable, and harmless to the proteins. Thus, the developed biosensor may provide a new prospect in molecularly imprinted sensing applications.
研究领域:
生物材料学
·
传感技术
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Huang Liu,Siyuan Zhan,Ruijing Li,Yong Liu,Ping Guo,Zhouhua Wang,Jianfen Du,Yunfan Wen,Panxiang Dai,Haoqi Liao
This study proposes a high-efficiency natural gas hydrate (NGH) storage method involving the formation of NGH in a water/oil emulsion with the addition of suitable thermodynamic additives. First, the CH 4 hydrate formation conditions in a water/diesel emulsion with the addition of hydrate thermodynamic additives, including tetrabutylammonium bromide (TBAB), tetrahydrofuran (THF), and cyclopentane (CP), were measured for the first time. Interestingly, in contrast to the case of the aqueous solution, both the TBAB and THF could not promote the formation of CH 4 hydrate in the water/diesel emulsion, and they exhibited a hydration inhibition effect. The CP substantially reduced the CH 4 hydrate formation pressure in the water/diesel emulsion, and the resulting hydrate/diesel slurry exhibited good fluidity. The CH 4 storage characteristics of the water/diesel-CP emulsion under hydrate formation conditions were systematically studied. At 276.15 K and 6 MPa, for a water/diesel-CP emulsion containing 30 wt% water cut, the CH 4 storage volume ( S ) per unit volume water in the emulsion reached 152.32 m 3 /m 3 , with the hydrartion reaction rate was 2.27 mmol/min, which was significantly higher than that for pure water, a water-CP solution, and a single water/diesel emulsion. S increased to 163.6 when the water cut decreased to 20 wt%; the entire experimental process lasted 90 min. An increase in the temperature from 274.15 to 282.15 K had a limited influence on S , indicating the wide range of application conditions of the water/diesel-CP emulsion for the production of NGH crystals. Furthermore, in situ particle video microscope observations and focused beam reflectance measurements confirmed the good flowability of the formed CH 4 hydrate/diesel slurry. Continuous production of NGHs can theoretically be achieved using the water/diesel-CP emulsion.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chun-Gang Xu,Wei Zhang,Hao-Yang Li,Chang-Wen Xiao,Xiao-Sen Li
Hydrate technology has a bright future in the development of high quality production and life for human being. However, the slow hydrate formation rate and low gas consumption are the biggest two obstacles to the commercial application of the technology. In this study, the macro experimental investigation, simulation calculation and microscopic analysis are combined to study the process of the hydrate formation and the effects of gas molecules at different cooling ways on the hydrate nucleation process from the perspective of the transformation of free-water to bound-water. Macroscopically, the difference of gas–liquid temperature makes the heat transfer process between gas and liquid at the interface more active, which is more conducive to the diffusion of gas to liquid; and microscopically, the transformation of free-water to bound-water and the distance between oxygen atoms d OO of adjacent water molecules in the hydrate nucleation are the two key factors affecting the rate of hydrate formation and gas consumption. The results of this study not only propose a more efficient hydrate formation way, but also provide direction for solving the key bottleneck of hydrate technology so that it possible for the hydrate technology from laboratory research to industrial application.
研究领域:
化学工程
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Entropy
·
2022
·Vol. 24
·期 5
·624
·
IF 2.738
Zhiwen Zhang,Xiaosen Li,Zhaoyang Chen,Yu Zhang,Hao Peng
The phase fraction measurement of gas-water-sand fluid in downhole is an important premise for safe and stable exploitation of natural gas hydrates, but the existing phase fraction measurement device for oil and natural gas exploitation can’t be directly applied to hydrate exploitation. In this work, the electrical resistivity properties of different gas-water-sand fluid were experimentally investigated using the multiphase flow loop and static solution experiments. The effect of gas phase fraction and gas bubbles distribution, sand fraction and sand particle size on the relative resistivity of the multiphase fluid were systematically studied. The measurement devices and operating parameters were also optimized. A novel combined resistivity method was developed, which demonstrated a good effect for the measurement of phase fractions of gas-water-sand fluid, and will have a good application potential in marine natural gas hydrates exploitation.Keywords:natural gas hydrates;sand production;multiphase fluid;phase fraction measurement;electrical resistivity;combined resistivity method
研究领域:
海洋工程
·
能源开发
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 37
·23956-23962
·
IF 4.036
Wenyuan TAN,Qi Chen,Rong Wang,Zhuqing Wang,Huan Zhang,Yuran Wu
Based on the gas–liquid phase chemiluminescence tester independently developed by our laboratory, a highly sensitive, fast and accurate on-line detection method of formaldehyde gas in ambient atmosphere is established. The chemiluminescence system and the trace formaldehyde gas in the air directly undergo an interface heterogeneous chemiluminescence reaction to obtain a strong chemiluminescence signal. Through the measurement of the chemiluminescence signal intensity, a highly sensitive, real-time and on-line method for the determination of formaldehyde in the air was established. Factors influencing the experimental results such as gallic acid, potassium dichromate, reaction medium concentration, surfactant type and concentration, pump speed, tube length, and interfering gas were discussed based on the single factor and orthogonal analysis results. Finally, the optimal detection conditions were collected, and the detection results were compared with the national standard phenol reagent method. The results show that when the concentration of the standard formaldehyde gas is in the range of 0–0.582 μg L−1, the linear equation of this method is y = 208x + 29.667, the linear coefficient is R2 = 0.997, and the minimum detection concentration of formaldehyde is 2.327 × 10−3 μg L−1. Under the same external conditions, the comparison and analysis using the national standard phenol reagent method proved that this method has the advantages of fast detection speed, low detection limit, good sensitivity, and accurate results, which can be used for real-time and online determination of trace formaldehyde in ambient air.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tao Wei,Wei Li,Jie Zhang,Xiaoling Xie
Forming nanocomposites among different metal oxide species may lead to gas sensors with superior gas sensing properties. In this work, terbium oxide (Tb 2 O 3 ) was used to form composite nanofibers with zinc oxide (ZnO) to detect nitric oxide (NO) gas. The Tb 2 O 3 /ZnO composite nanofibers were synthesized through a facile electrospinning and annealing treatment. The heterostructure was investigated by various techniques such as XRD , SEM, TEM , and XPS , whereas the gas sensing performance of the composite nanofibers was investigated with a static gas testing system. Results showed that the Tb 2 O 3 /ZnO composite nanofiber exhibited excellent sensing performance to NO at 180 °C. Specifically, the composite nanofiber with [Tb]/[Zn] molar ratio of 0.01 had a high response of 28.3 (resistance ratio) to 1 ppm NO gas at 180 °C, with low response to other interference gases. The sensor also exhibited good repeatability and long-term stability. These remarkable sensing properties indicate that conventional ZnO is still promising for real applications via material composition and structure.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Lei Yu,Shuyong Li,Bo Liu,Shuai Liu,Junjie Sheng,Yinyong Ao
Knowing the H 2 concentration released from polymer materials is essential to understand the degradation degree of polymer materials. In this study, a novel strategy of 1,4-bis(phenylethynyl)benzene (DEB) hydrogenation in combination with gas chromatography - mass spectrometry (GC-MS) determination of hydrogen gas (H 2 ) was developed. In this strategy, DEB was utilized to react with H 2 for establishing the quantitative analysis method of H 2 . A H 2 analysis platform that could accurately control H 2 concentration was designed and fabricated to be used to establish the quantitative method of H 2 . The linear regression curve was established between the H 2 standard and the MS signal of the reaction products on GC-MS. Finally, the H 2 released from polyethylene under gamma radiation was detected by this method. This method could be a powerful auxiliary tool for studying the content changes of H 2 .
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Huai Wang,Zhenyu Yuan,Renze Zhang,Mengran Ran,Liyun Qin,Hanyang Ji,Kaiping Yuan,Fanli Meng
Aniline is not only a type of carcinogen but also the raw material for the preparation of drugs. Therefore, the detection of aniline is of great significance in human health and environmental protection. In this paper, rGO-SmFeO 3 -In nanocomposites were prepared by hydrothermal method for the detection of aniline by combining the excellent properties of rGO and In. The lattice, micro-morphology, elemental distribution and chemical state of the gas-sensitive material were analyzed through XRD, SEM, EDS, and XPS characterizations, which confirmed that the In-doped SmFeO 3 (SFO) nanoblocks-assembled microspheres composited on rGO were successfully prepared, and the nanocomposite possessed abundant oxygen vacancies. The gas sensitivity test results showed that 2 wt% rGO-SFO-1.5 wt% In had excellent gas sensitivity to aniline gas. At 200℃, 2 wt% rGO-SFO-1.5 wt% In had a higher response value of 64.2–100 ppm aniline, which was 6 times that of SFO, and showed a faster response and recovery process (10 s/5 s). In addition, the sensor demonstrated its ability to detect aniline at a lower detection limit of 1 ppb with a response rate of 1.25. Furthermore, the gas sensor was integrated into the embedded system to achieve real-time detection of aniline gas. This study provides a new reference for the development of low detection limit and high sensitivity aniline gas sensor.
研究领域:
材料科学
·
气体传感技术
·
纳米材料
·
环境监测
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hang Liu,Jinkai Zhang,Chuanyu Yang,Runkang Lv,Yihao Wen,Yuhong Zhang
In this paper, the nanosheet structure of Gd-doped ZnO nanosheets is prepared by single-step hydrothermal method. The gas sensitive performance of Gd-doped ZnO nanosheets is investigated. The Gd-ZnO sensor not only improves the response to ethanol gas by a factor of 11.8 compared to a pure ZnO sensor, but also reduces the optimal working temperature by 20 °C. The response/recovery time are also reduced to varying degrees. In addition, the Gd-ZnO sensor maintain a certain performance to ethanol gas under different humidity conditions. This article elaborates on the sensing mechanism of the Gd-ZnO sensor for ethanol gas. The research in this paper opens up a new idea for improving zinc oxide sensors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Liu,Zheng Li,Ruiqi Han,Zhenting Wu,Yanpeng Liu,Xin Tan,ShuangYan Meng,Yanrong Wang,Shanglong Peng
MXene has found widespread application in gas sensing applications through the formation of composite materials with metal oxides, with its excellent electrical conductivity and high specific surface area being its core advantages. However, during the synthesis of composite materials, MXene oxidizes to TiO 2 , leading to reduced electrical conductivity and a decrease in specific surface area. Additionally, MXene oxidation issues arise during gas sensing tests. To address these limitations, we developed a pre-oxidation doping strategy using nitrogen annealing, which preserves MXene's large specific surface area and conductivity during subsequent experiments. Experimental data confirmed that the pre-oxidation single-doping strategy retained the Ti 2p orbital characteristics, indicating that the treated MXene still maintains its two-dimensional material properties. The optimized Co 3 O 4 /N-MX7.5 composite exhibits peak ethanol sensing performance at 120°C, with improved selectivity attributed to enhanced conductivity due to nitrogen doping. This study establishes a methodological approach to mitigate MXene oxidation and functional group interference, advancing the rational design of MXene-based gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
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