Separations
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2025
·Vol. 12
·期 2
·22
·
IF 2.7
Huan-Huan Fan,Xiang-Ling Wang,Jie Feng,Wen-Ying Li
A comprehensive understanding of the compositions and physicochemical properties of coal-based liquids is conducive to the rapid development of multipurpose, high-performance, and high-value functional chemicals. However, because of their complex compositions, coal-based liquids generate two-dimensional gas chromatography (GC × GC) chromatograms that are very complex and very time consuming to analyze. Therefore, the development of a method for accurately and rapidly analyzing chromatograms is crucial for understanding the chemical compositions and structures of coal-based liquids, such as direct coal liquefaction (DCL) oils and coal tar. In this study, DCL oils were distilled and qualitatively analyzed using GC × GC chromatograms. A deep-learning (DL) model was used to identify spectral features in GC × GC chromatograms and predominantly categorize the corresponding DCL oils as aliphatic alkanes, cycloalkanes, mono-, bi-, tri-, and tetracyclic aromatics. Regional labels associated with areas in the GC × GC chromatograms were fed into the mask-region-based convolutional neural network’s (Mask R-CNN’s) algorithm. The Mask R-CNN accurately and rapidly segmented the GC × GC chromatograms into regions representing different compounds, thereby automatically qualitatively classifying the compounds according to their spots in the chromatograms. Results show that the Mask R-CNN model’s accuracy, precision, recall, F1 value, and Intersection over Union (IoU) value were 93.71%, 96.99%, 96.27%, 0.95, and 0.93, respectively. DL is effective for visually comparing GC × GC chromatograms to analyze the compositions of chemical mixtures, accelerating GC × GC chromatogram interpretation and compound characterization and facilitating comparisons of the chemical compositions of multiple coal-based liquids produced in the coal and petroleum industry. Applying DL to analyze chromatograms improves analysis efficiency and provides a new method for analyzing GC × GC chromatograms, which is important for fast and accurate analysis.
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JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Caihong Liu,Rui Gao,Xiaoyue Zhang,Tiezheng Tong,Qiang He,Jun Ma
Forward osmosis (FO) membrane process facilitates effective treatment of shale gas wastewater (SGW) due to its tolerance to high salinity and exceptional separation performance. However, serious membrane fouling remains a challenge regarding the complexity of realistic SGW. To address the fouling issues, controlled block copolymer architecture was constructed on the FO membrane surface to achieve combined effect of oil-resistance, self-regenerating, and fouling mitigation. In the modification process, zwitterionic polymer with strong hydrophilicity and fluoropolymers with low surface energy were successively grafted to the membrane active layer by atom transfer radical polymerization. The outermost fluoropolymer layer with low surface energy imparts the membrane with anti-oil and self-regenerating capabilities. Meanwhile, the strong hydration effect of the zwitterionic polymer ensures that nonspecific foulants breaking through the outermost defense are kept away from the membrane surface. According to the Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, the modified FO membrane exhibited a significantly higher total interaction energy ( Δ G TOT ) compared to the pristine membrane when exposed to various types of model foulants (bovine serum albumin, humic acid, sodium alginate, mineral oil). Furthermore, the advantage of having multiple defense mechanisms was further substantiated through dynamic filtration tests with realistic SGW. In comparison to the pristine TFC membrane, the modified membrane not only experienced a much smaller decrease in water flux (reduced by 52%) during fouling but also an exceptional flux recovery after cleaning (∼97%). These findings underscore that the modified FO membranes greatly mitigated membrane fouling associated with SGW through the synergistic interplay between a zwitterionic polymer and a low surface energy material, highlighting its promising potential in SGW treatment via membrane technology.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yong Wang,Xuanyu Zhao,Shaoxiong Han,Yongzhen Wang
The development of efficient technology for natural gas separation in industrial processes has become imperative. In this regard, the exploration of novel and effective adsorbents has gained significant attention. One promising approach is the metal regulation of metal–organic frameworks (MOFs), particularly heterometallic MOFs, which offer greater potential for gas separation due to their diverse composition. This study presents the synthesis of a series of iron- and vanadium-based heterometallic MOFs (MIL-126), featuring interpenetrated structures, and investigates their adsorption performance for methane (CH4), ethane (C2H6), and propane (C3H8). Experimental results reveal that the choice of metal combinations within the MOF framework significantly influences the adsorption performance of MIL-126. Notably, heterometallic MIL-126(Fe/Ni) exhibits a stronger binding affinity for C3H8, with an impressive uptake of 177 cm3/g. The C3H8/CH4 ideal adsorbed solution theory selectivity of MIL-126(Fe/Ni) surpasses that of MIL-126(Fe) by a factor of 7, reaching a value of 853, second only to the highest reported value. Furthermore, MIL-126(Fe/Ni) exhibits remarkable potential for the recovery of pure CH4 from the equimolar C3H8/CH4 mixture, with the amount of pure CH4 approaching the maximum reported value for MOFs. Insights from isosteric heat at zero loading and Henry’s coefficients indicate that the transformation of metal types leads to a change in the interaction energy between C3H8 and the framework. Furthermore, breakthrough experiments validate the effective separation capability of MIL-126(Fe/Ni) for CH4/C2H6/C3H8 mixtures. These findings underscore the remarkable potential of heterometallic MOFs in constructing a wide range of new MOFs with tailorable properties, thereby enhancing their gas separation performance.
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Small
·
2024
·
IF 13
Wanglin Zhang,Xuanhao Wu,Xiaoyan Peng,Li Zhu,Hongkang Wang,Hui Liu,Hongye Yuan
The advancement of wireless gas sensing signifies a substantial leap forward in gas detection and intelligent monitoring technologies. This necessitates stringent design criteria for gas sensitive materials with good solution processability, conductivity, and porosity, whose design and synthesis remain challenging yet highly sought-after. Herein, the fabrication of NUS-8/polyaniline (PANI) nanosheets is presented with excellent solution processability, high porosity, triboelectric property, and superior electrical conductivity via a template-directed polymerization strategy. Solution processable NUS-8 nanosheets, synthesized directly by a “one-pot” approach, serve as templates to enhance the “on-site” polymerization of aniline, resulting in the formation of PANI layer on NUS-8 nanosheets with a thickness of 7 nm. The resultant NUS-8/PANI nanosheets exhibit outstanding solution processability, and a film conductivity of 8.6 S m −1 . The solution processability enables the facile fabrication of homogeneous and compact NUS-8/PANI films and thus their integration onto electronic devices targeted for multifunctional sensing. The NUS-8/PANI coated sensors demonstrate sensitive and selective detection at room temperature toward ultratrace ammonia with a detection limit of 120 ppb. A wireless sensing system based on the NUS-8/PANI-coated sensor is capable to monitor the spoilage process of meat. This study paves novel avenues for designing and synthesizing gas-sensitive materials for practical applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Changgan Lai,Zhiliang Guo,Zepei Lang,Haochi Yu,Yanghong Yan,Mingliang Zhang,Junhao Shen,Houcheng Zhang,Shuai Ji,Xinyan Zhou,Jianming Li
Efficient hydrogen production through water splitting is vital for advancing clean energy technologies. This work presents the design and fabrication of a novel composite membrane integrated into a zero-gap alkaline electrolyzer with a gas diffusion electrode, aiming to address energy efficiency challenges and gas bubble hindrance. The composite membrane, denoted NiₓFeᵧ-LDH@PVA, features a unique polymer network embedding nickel-iron layered double hydroxides (Ni x Fe y -LDH) grafted onto polyvinyl alcohol (PVA), as a multichannel transmission medium. Ni x Fe y -LDH@PVA composite membrane has high ionic conductivity, mechanical stretchability, wettability, and high ion adsorption. Meanwhile, an optimized alkaline electrolyzer structure improves the ion transport efficiency from the cathode and reduces the resistance to bubble release. An alkaline electrolyzer is assembled using a nickel mesh (NM) electrode for overall water splitting. Experimental results demonstrate that the alkaline electrolyzer utilizing the NM|Ni₃Fe₁-LDH@PVA|NM configuration achieves a current density of 590 mA cm −2 at a cell voltage of 2.0 V in the 90 °C and exhibits robust stability, operating for over 200 h. This work provides a meaningful strategy using composite membranes as a substitute for traditional separators (asbestos, textile cloth, polyphenylene sulfide, etc.) to promote the development of the conventional alkaline electrolyzer.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xueping Yan,Peng Jing,Zitian Zhuang,Jianing Zhang,Haiming Chen,Tifeng Xia,Ke Jiang
As an alternative to chemotherapy, emerging gas therapy is considered a “green” treatment due to its minimal side effects. However, even typical gas molecules like nitric oxide (NO) face challenges such as a very short half-life (1.5–6 min), poor targeting, and limited therapeutic effects. This study employs a one-pot method to simultaneously encapsulate the NO donor L-arginine (L-Arg) and the H 2 O 2 precursor Vitamin K3 (VK3) into the pores of zeolitic imidazolate framework-8 (ZIF-8), achieving their co-delivery to tumor sites to address these issues. Furthermore, ZIF-8 is functionalized with hyaluronic acid (HA) to impart active targeting properties to tumor tissues. In the acidic tumor microenvironment, pH-sensitive ZIF-8 degrades, releasing VK3 and L-Arg. Under the action of the NAD(P)H quinone oxidoreductase-1 (NQO1) enzyme, VK3 generates H 2 O 2 , increasing oxidative stress levels in the tumor microenvironment, and reacts with L-Arg to produce NO, thereby achieving tumor oxidative stress-based gas therapy. Both in vitro and in vivo experiments showed good tumor treatment effects, with a tumor inhibition rate of up to 90.5 % and minimal impact on normal tissues and organs. This approach demonstrates efficient loading, controlled release, and significant anti-tumor performance, offering new insights into gas and reactive oxygen species (ROS) synergistic therapy.
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Engineering
·
2024
·
IF 10.1
Xuerui Zang,Yan Cheng,Yimeng Ni,Weiwei Zheng,Tianxue Zhu,Zhong Chen,Jiang Bian,Xuewen Cao,Jianying Huang,Yuekun Lai
Inspired by the layered structure of dental enamel in the human body, a superhydrophobic coating with an elastic gradient was developed and placed on the inner wall of a gas transmission pipeline to reduce erosion and corrosion. The coating comprises a hard bionic superhydrophobic top coating and a hydrogel layer underneath for buffering and self-repair. To improve the impact resistance of the top coating, layered structures with different viscoelasticities were constructed by controlling the content of TiO 2 @lauric acid (LA) particles and carbon nanotubes (CNTs). The amylose hydrogel underlayer not only acts as a shock absorber but also restores potential damage in the top layer, bringing an additional benefit to the corrosion resistance of the coating. Thanks to these three cooperative approaches, the coating exhibits excellent mechanical durability (800 cycles with 600-mesh sandpaper under a 49 kPa load) and corrosion resistance (with a corrosion potential of −0.21 V). Moreover, it maintains its superhydrophobicity after sanding, bending, soaking, and scratching, demonstrating its potential for application to protect transmission pipelines from erosion and corrosion.
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JOURNAL OF APPLIED PHYSICS
·
2024
·Vol. 135
·期 8
·
IF 2.7
Xu Xiaoli,Jiang Hongtao,Liu Wangwang,Wang Shengyi,Wang Xiaoping,Wang Mengyu,Ma Wei,Ma Shuyi,Wei Jinsha
It is a novel-effective process for realizing high-efficiency sensing and continuous gas monitoring by introducing precious metals into metal–oxide–semiconductors (MOSs). In this study, Ag is exploited to prepare surface functionalized SnO 2 nanoparticles (NPs) and innovative x Ag@SnO 2 /CsPbBr 3 , activating and catalyzing the gas sensing reactions on semiconductors. The results show that the precious metal Ag NPs promote the directional transport of carriers, thus improving the gas sensing performances. In addition, innovative x Ag@SnO 2 /CsPbBr 3 composites originated from Ag@SnO 2 NPs and 3-mercaptopropionic acid treated all-inorganic perovskite CsPbBr 3 are constructed to further accelerate electron transfer on heterointerfaces, enabling continuous and efficient monitoring of ethanolamine (EA) at room temperature. The sensing properties of Ag@SnO 2 /CsPbBr 3 on various volatile organic compounds are investigated. Compared with pure CsPbBr 3 , the EA response of as-prepared 2Ag@SnO 2 /CsPbBr 3 is obviously improved by about sevenfold. The response/recovery time is greatly shortened, besides the good stability. Another interesting result for x Ag@SnO 2 /CsPbBr 3 is the lower limit of detection of 44.43 ppb. The work demonstrates that Ag modification facilitates the adsorption/desorption rate and the response. Furthermore, the catalytic activation of noble metal Ag NPs and the synergistic interaction of SnO 2 /CsPbBr 3 nano-heterojunctions promote EA sensing performances at room temperature.
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Pharmacognosy Magazine
·
2010
·
IF 0
Minxia Zheng,Jie Shen,Kai Yang,Songxiang Qian,Sujuan Feng
A simple approach for the rapid determination of polysaccharides in BianTi Soft Extract using spectrophotometry coupled with gas chromatography-mass spectrometry (GC-MS) was developed. The mixed standard solution composed of D-glucose, D-mannose, galactose and D-xylose in different proportions (1.00: 1.01: 0.12: 0.05) was prepared according to the monosaccharide composition analysis of the polysaccharides by GC-MS. The determination of polysaccharides by UV-Vis spectrophotometer was performed after 35-min color reaction, in which 1 ml 5% phenol and 4 ml sulfate was used. The assay of the method validation has shown that the method was stable, reliable and feasible. Furthermore, the proposed method was successfully applied in the preparation procedure of BianTi Soft Extract, selecting out optimal decoction conditions and suitable decoction container. It suggests that the convenient method could be useful for the quality control of BianTi Soft Extract. Meanwhile, it may be an alternative for polysaccharides determination of other formulations.
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Journal of Pharmaceutical Analysis
·
2025
·
IF 8.9
Jinyu Wang,Yuhao Guo,Xiaomei Wu,Yiming Ma,Qianqian Qiao,Linwei Li,Tao Liao,Ying Kuang,Cao Li
To effectively exploit the tumor microenvironment (TME), TME-responsive nanocarriers based on cascade reactions have received much attention. In this study, we designed a novel nanoparticle PB@SiO 2 @MnO 2 @P-Arg (PMP) to construct a cascade reaction nanoplatform. While using biosafety Prussian blue (PB) for photothermal therapy (PTT), this nanoplatform uses silica (SiO 2 ) as an intermediate layer to assemble Prussian blue and manganese dioxide (MnO 2 ) into a core-shell structure, which effectively enhances the response of the nanoplatform to TME and promotes the effect of chemodynamic therapy (CDT) resulting from glutathione (GSH) depletion and Fenton-like reaction. The released Mn 2+ can also be used for magnetic resonance imaging (MRI). Through the cascade reaction, poly-L-arginine (P-Arg) coated on the surface of the nanoparticles can react with hydroxyl radical (•OH) obtained from the Fenton-like reaction to release nitric oxide (NO), which further reacts with O 2 • − to produce the more toxic peroxynitrite anion (ONOO − ). The photothermal effect of PB further enhances the effect of the cascade reaction while reducing the amount of heat required for treatment. In vitro and in vivo studies confirmed the antitumor effects of cascade reaction-based nanoplatforms in combined photothermal/chemodynamic/gas cancer therapies, providing new strategies for the design and fabrication of multifunctional nanoplatforms that integrate diagnostic and therapeutic functions, as well as the application of cascade reactions in multimodal synergistic therapy.
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Science Advances
·
2024
·Vol. 10
·期 2
·
IF 11.7
Zongman Zhang,Jiawei Yang,Haoyang Wang,Chunya Wang,Yuheng Gu,Yumiao Xu,Sunghoon Lee,Tomoyuki Yokota,Hossam Haick,Takao Someya,Yan Wang
Hydrogel-enabled skin bioelectronics that can continuously monitor health for extended periods is crucial for early disease detection and treatment. However, it is challenging to engineer ultrathin gas-permeable hydrogel sensors that can self-adhere to the human skin for long-term daily use (>1 week). Here, we present a ~10-micrometer-thick polyurethane nanomesh–reinforced gas-permeable hydrogel sensor that can self-adhere to the human skin for continuous and high-quality electrophysiological monitoring for 8 days under daily life conditions. This research involves two key steps: (i) material design by gelatin-based thermal-dependent phase change hydrogels and (ii) robust thinness geometry achieved through nanomesh reinforcement. The resulting ultrathin hydrogels exhibit a thickness of ~10 micrometers with superior mechanical robustness, high skin adhesion, gas permeability, and anti-drying performance. To highlight the potential applications in early disease detection and treatment that leverage the collective features, we demonstrate the use of ultrathin gas-permeable hydrogels for long-term, continuous high-precision electrophysiological monitoring under daily life conditions up to 8 days.
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PETROLEUM SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.3
Renbao Zhao,Yuan Yuan,Zhihai Yu,Bo Gao,Jiaying Wang,Shixun Bai,Hao Wang
Nitrogen foam treatment is widely used to control water production in oil wells by selectively reducing water phase relative permeability in oil-water-transition zone. A novel method is proposed to analyze nitrogen gas saturation distribution under varying foam generation pressure drops, which the heat conduction coefficients and heat capacities of nitrogen gas and water are considered. A one-dimensional sand pack model was used to evaluate the impact of gravity on gas saturation distribution, tested in both horizontal and vertical orientations. The gas and water saturation varying along the flow direction of the tube can be calculated according to temperature change. The results indicate that nitrogen injection with pressure drops of 0.9 and 1.2 MPa can generate more evenly gas and water distribution as well as longer foam flow distance comparing to the higher injection pressure drops of 1.5 MPa. Average gas saturation generated in the vertical manner is found to be lower than that of horizontal one due to the higher gas flow resistance in the vertical direction. The simulation result of gas saturation distribution along the tube using Fluent software matches the experimental results well.
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