JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.112
Chaohang Xu,Deming Wang,Hetang Wang,Yi Zhang,Guolan Dou,Qingguo Wang
Foamability, foam initial liquid volume, and bubble size of fatty alcohol sodium polyoxyethylene ether sulfate (AES) surfactant solution were studied with and without the addition of sodium carboxymethylcellulose (CMC) at different gas flow rates, using a sparging method. The generation time decreased with increasing gas flow rate. At low gas flow rates, the added CMC greatly enhanced the foamability by preventing bubble collapse. The initial liquid volume of the foam first increased rapidly, and then gradually decreased. Increasing the CMC concentration increased the initial liquid volume of the foam. The mean bubble diameter first clearly decreased, then increased slowly with increasing gas flow rate. CMC showed different effects on bubble size at high and low gas flow rates. Adsorption of CMC on AES molecules forms a network structure and improves bubble film stability, which can explain the above results. These findings provide guidelines for generating foam with excellent properties suitable for coal mine dust control by adjusting the gas flow rate and the concentration of the added water-soluble polymer.
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高影响因子
Energy Technology
·
2015
·Vol. 3
·期 8
·815-819
·
IF 2.824
Yao Liu,Biyu Chen,Yulong Chen,Shihao Zhang,Weiqi Guo,Yuanhao Cai,Bien Tan,Weixing Wang
Methane is important in future energy schemes. The main strategies for storing and transporting methane are compression, liquefaction, and physical adsorption in synthetic porous materials. Here, we show that methane can be stored in a hydrated form using natural amino acids such as leucines as effective promoters to form methane hydrate with a high formation rate and a high capacity. In addition, the methane hydrate formed from the L -leucine solution dissociates without foaming phenomenon. We also showed that the heavier hydrocarbons in natural gas can enhance the promoting effect of L -leucine.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 47
·20561-20571
·
IF 7.139
Tianyu Ai,Jing Li,Shuai Nie,Yansheng Yin,Jinlin Lu,Shuo Bao,Ling Yan
Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of α-Fe 2 O 3 is evolved by introducing Mn elements. The performance of the α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons as H 2 gas sensors are studied and compared. The Mn/α-Fe 2 O 3 -5 polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 °C. The response and recovery times are 10 s/24 s for H 2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H 2 gas sensors. Furthermore, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing α-Fe 2 O 3 based sensing materials for various sensors applications.
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高影响因子
FLAVOUR AND FRAGRANCE JOURNAL
·
2019
·Vol. 34
·期 4
·271-279
·
IF 1.377
Zong Tan,Zhixuan Huang,Yue Lv,Yuansong Li,Da Chen
The discrimination of chicken spoilage is extremely important in order to guarantee the quality and safety of chicken before consumption, and requires an efficient and reliable method. We aimed to find a rapid and accurate method to discriminate the level of spoilage of chicken, and have developed a gas Fourier transform infrared spectroscopy (G-FTIR) methodology based on analysing volatiles from chicken samples. In this method, the volatiles of chicken samples were first measured by the G-FTIR spectrometer. After that, a chemometrics method combining principal component analysis (PCA) with support vector machine (SVM) was developed to encode the G-FTIR spectra. With the combination of G-FTIR spectra and the chemometrics method, a relationship between the spoilage levels of chicken and the G-FTIR spectra of volatiles was established. As a result, the spoilage levels of chicken samples were accurately distinguished with a prediction accuracy of 100%, for samples stored at both normal (20 °C) and cold (4 °C) temperatures. The results obtained were correlated with the routine total volatile basis nitrogen (TVB-N) method for validation. In addition, The G-FTIR detection process for each sample could be performed within 3 min, requiring no chemical reagents. The G-FTIR methodology performed well for the rapid discrimination of chicken spoilage, which could also be extended to the detection of other spoiled foods.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2018
·
IF 2.207
Hongyu Shi,Na Li,Zhixia Sun,Tianqi Wang,Lin Xu
TiO 2 nanoparticles are commonly used as versatile precursors to make functional nanocomposite materials. However, the surface defects at grain boundaries of TiO 2 nanoparticles significantly affect the photoelectric properties of TiO 2 nanomaterials . In this work, we firstly prepared nanocomposites of TiO 2 and polyoxometalates (POMs) in which different POMs, including titanium-substituted POMs K 5 [PW 11 TiO 40 ] and K 7 [PW 10 Ti 2 O 40 ], are incorporated with TiO 2 nanoparticles so as to make an interface modification on grain boundaries of TiO 2 nanoparticles. Then the photoconductivities of the TiO 2 /POM nanocomposites were investigated through measurement of photocurrent responses, current-voltage curves, Mott-Schottky plots and surface photocurrent spectra. Compared with pure TiO 2 nanoparticles, TiO 2 /POM nanocomposites exhibit superior photoelectric properties, benefitting from the interface modification from different POMs. The gas sensing performance for acetone was also explored by use of the as-prepared photoconductive devices, and TiO 2 /PW 11 Ti exhibited a high gas sensing performance.
研究领域:
材料科学
·
纳米科技
·
半导体物理
·
传感器技术
·
光电子学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Paifeng Luo,Shengwen Zhou,Yugang Zhou,Wei Xia,Lin Sun,Jigui Cheng,Chenxi Xu,Yingwei Lu
Over the past few years, significant attention has been focused on HC(NH2)2PbI3 (FAPbI3) perovskite due to its reduced band gap and enhanced thermal stability compared with the most studied CH3NH3PbI3 (MAPbI3). However, FAPbI3 is sensitive to moisture and also encounters a serious structural phase-transition from photoactive α-phase to photoinactive δ-phase. Herein, we first develop a novel FAI gas-phase-assisted mixed-cation compositional modulation method to fabricate CsxFA1–xPbI3 perovskite solar cells (PSCs), and realize the structural stabilization of α-phase FAPbI3 with the incorporation of smaller inorganic Cs+ ions. Through the setting of different Cs+ contents (x = 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.50) along with a moderate FAI vapor deposition process, a series of CsxFA1–xPbI3 films with consistent compositions are fabricated, which perfectly resolves the main blocking problems of the conventional solution approach, such as difficulty in compositional control and rough film morphology. Meanwhile, we find that the Cs+ amount is crucial for generating phase-pure CsxFA1–xPbI3 (0 < x < 0.30) while higher contents result in phase segregation. Consequently, the optimum amount of Cs+ (x = 0.15) is verified, and Cs0.15FA0.85PbI3 shows the smallest unit cell volume and good moisture-resistant feature. Correspondingly, the highest power conversion efficiency (PCE) of 14.45% based on Cs0.15FA0.85PbI3 PSCs is successfully achieved in this work.
研究领域:
材料科学
·
光伏技术
·
钙钛矿太阳能电池
·
薄膜制备
·
能源材料
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高影响因子
Separations
·
2026
·Vol. 13
·期 1
·
IF 2.7
Ziqi Yang,Jian Li,Shuaiyi Ma,Zhen Wang
Widely used in treating oil mist aerosols generated from metalworking processes, conventional gas–liquid coalescing filters face drawbacks such as increased energy consumption, performance limitations, and shortened service life due to high steady-state pressure drop. To address these issues, this study proposes an innovative design for a filter based on wettability-regulated gradient pore structure. Using glass fiber filter media with different pore size parameters as the substrate and incorporating an intermediate mesh layer, a three-layer filtration structure of “large-pore filtration layer—mesh layer—small-pore filtration layer” was constructed. The surface wettability of each layer was regulated by a self-developed surface modifier, producing gradient pore structure filters with different wettability configurations. The variations in key performance parameters, including steady-state pressure drop, filtration efficiency, saturation, and service life, were systematically evaluated for these configurations. Experimental results demonstrated that the configuration with an “oleophobic large-pore filtration layer—mesh layer—oleophilic small-pore filtration layer” yielded the best overall performance. Analysis based on the “jump-channel” model indicated that the gradient pore structure achieves progressive droplet filtration and optimizes droplet coalescence and capture through wettability differences. Consequently, while maintaining exceptional filtration efficiency (>99%), this configuration significantly reduces the steady-state pressure drop by over 34% and effectively extends the service life by more than 66%. This wettability-regulated gradient pore structure provides a novel technical pathway for addressing the challenges of balancing pressure drop and filtration efficiency, as well as extending the service life, in gas–liquid coalescing filters.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiajia Fan,Jinyuan Hu,Shengchi Bai,Xifan Li,Guijing Chen,Jia Chen,Sheng Chen,Baicang Liu
Developing high-performance anti-fouling ultrafiltration membranes is essential for treating shale gas wastewater (SGW), addressing its severe membrane fouling issues. This study reports the fabrication of polyvinylidene fluoride (PVDF)/PVDF-graft-poly(ethylene glycol) methyl ether methacrylate (PVDF-g-PEGMA) blended hollow fiber membranes via non-solvent induced phase separation for direct treatment of SGW. The influences of the copolymer doping ratio on microstructure, chemical composition, and hydrophilicity were systematically investigated. The addition of PVDF-g-PEGMA contributed to a favorable membrane morphology and significantly improved hydrophilicity. The 20 wt% PVDF-g-PEGMA modified membrane achieved a 64.4% increase in pure water flux while retaining over 95.9% rejection for both humic acid and bovine serum albumin. More importantly, in long-term filtration of SGW, the modified membrane demonstrated a stable permeation flux of ~30.4 L·m −2 ·h −1 , surpassing the performance of the unmodified membrane by 300% and reducing the cost of water treatment for unit flux by 17.6%. Analysis based on the extended Dragun-Landau-Verwey-Overbeek theory indicated that the incorporation of PVDF-g-PEGMA effectively reduced the attractive interaction energy between the membrane and pollutants. These results demonstrate that the PVDF-g-PEGMA blending modification not only significantly enhanced membrane permeability and anti-fouling performance under challenging real wastewater conditions but also achieved sustained flux and superior anti-fouling behavior during lab-scale SGW operation, thereby enabling water reuse with reduced maintenance demand.
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产品关联
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高影响因子
ACS Sensors
·
2026
·
IF 10.9
Peng Xu,Yanlei Guo,Xin Lv,Shuting Wei,Dan Yang,Renquan Guan,Yuxin Wang,Yingmin Teng,Aiceng Li,Huaqiao Tan,Zhongling Lang,Zheng Lou,Lili Wang,Zhao Zhao
The necessity for high-efficiency, low-power room-temperature (RT) ammonia (NH3) sensors is particularly acute in environmental monitoring, industrial safety, and medical diagnostics. However, conventional chemiresistive sensors frequently require elevated temperatures to initiate reactions, leading to high energy consumption and potential safety risks. Inspired by plant photosynthesis, this paper successfully designs a ternary S-scheme heterojunction for a photo-activated RT NH3 sensor. The design effectively mimics the efficient charge transfer process in photosynthesis, thereby significantly promoting the separation and migration of photogenerated carriers and enhancing the sensing performance. Experimental results demonstrate exceptional performance under illumination: a high response value of 1679% (representing a 20-fold improvement over the dark state), rapid response and recovery times of 2.1 s and 1.9 s, respectively, along with outstanding selectivity, excellent stability, and a detection limit as low as 17 ppb. This work demonstrates a novel, efficient RT photo-activated NH3 sensor and provides innovative insights into designing biomimetic, smart gas-sensing materials and devices.
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产品关联
DOI
PubMed
高影响因子
Journal of the Iranian Chemical Society
·
2026
·Vol. 23
·期 6
·152
·
IF 2.4
Liu Ruojin,Liu Baoyu,Shao Wenliang
A gas chromatography-mass spectrometry (GC-MS) method was developed for the simultaneous determination of ethylene chlorohydrin (ECH) and ethylene glycol (EG) residues in disposable infusion sets sterilized with ethylene oxide (EO). Samples were extracted with acetonitrile at 60 °C for 4 h using a sample/solvent ratio of 0.4 g/mL. Chromatographic separation was achieved on a DB-WAX capillary column with a programmed temperature gradient. Detection was performed in selected ion monitoring (SIM) mode. The method exhibited good linearity in the range of 0.025–2.50 µg/g for ECH and 0.125–2.50 µg/g for EG. The limits of detection (LODs) and quantification (LOQs) were 0.008–0.04 µg/g and 0.025–0.125 µg/g, respectively. The recoveries at three spiked levels (0.125, 0.25, and 1.25 µg/g) ranged from 94.87 to 108.63% with relative standard deviations (RSDs) between 0.62 and 7.88%. The validated method is sensitive, accurate, and robust, providing a reliable approach for assessing the risks associated with EO-related residues in disposable infusion sets. This method provides a reliable tool for safety evaluation of EO-sterilized medical devices.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Jia Song,Xinyu Wang,Min Deng,Zikang Qin,Yi Shen,Lin Yang,Wenju Jiang,Lu Yao,Junfeng Zheng,Zhongde Dai
Efforts for the enhancement of membranes for efficient gas separation are crucial to address challenges in carbon capture and hydrogen economy applications. A novel pore engineering strategy for CMS membranes via ionic liquids (ILs) is presented in this work. Analysis revealed that [Emim][Tf2N] functioned as a porogen and a structural modulator during carbonization, creating interconnected pore channels that facilitated efficient gas transport pathways while enabling appropriate d-spacing (3.55 Å) and precise pore formation (2.5–3.5 Å) for size-sieving of H2 (2.89 Å) and CO2 (3.3 Å). By optimizing the [Emim][Tf2N] loading and carbonization temperature, the optimal membrane with 3 wt % ILs under 550 °C (PI-3[Emim][Tf2N]-550) exhibited a simultaneous enhancement of both high permeability (H2 = 10883.1 Barrer; CO2 = 5697.6 Barrer) and selectivity (H2/N2 = 83.4, H2/CH4 = 113.7, CO2/N2 = 39.8, and CO2/CH4 = 45.5), surpassing the latest Robeson upper bound. Furthermore, the membrane exhibited superior antiplasticization properties and remained stable over 7 days, which was promising for practical H2 and CO2 separation applications.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124932
·
IF 7.5
Qiao Wen,Kun He,Yijie He,Xixi Shi,Shucai Li,Zaiwu Zhang,Tingli Yan,Hongzhou Zhang,Chunliang Li,Dawei Song
LiFePO 4 batteries have become a mainstream choice in the power battery market due to their high safety, long cycle life and low cost. Consequently, a large number of LiFePO 4 batteries will be retired as their lifespan ends, and disassembled to LiFePO 4 black powder. To address those issues such as low-value and environmental pollution during the traditional chemical recycling of spent LiFePO 4 black powder, a novel black powder recycling method is developed in this work. Firstly, this method achieves the direct recovery of P and Fe elements through Na 2 S 2 O 8 leaching, producing battery-grade FePO 4 without further purification. Then, this method achieves the low-cost recovery of Li element through furnace gas (containing CO 2 ) precipitating lithium, producing battery-grade Li 2 CO 3 , thereby combining environmental and economic benefits. Furthermore, the recycled Li 2 CO 3 and FePO 4 are used to directly re-synthesize LiFePO 4 . Comprehensive testing confirmed that the performance of the re-synthesized LiFePO 4 is comparable to that of commercial products. This method opens up a promising pathway for the sustainable and commercially viable recycling of spent LiFePO 4 black powder.
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