JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2025
·
IF 1.9
Chenning Su,Guozheng Wang,Jianzhong Jiang
Smart wormlike micelles (WLMs) that respond to environmental stimuli and display tunable rheological properties have attracted considerable interest. However, the responsive surfactants in the smart WLMs are always commercially unavailable. Herein, we report the preparation of CO2/N2 and redox dual-stimuli responsive wormlike micelles (WLMs) using sodium ferrocenecarboxylic acid (FA), hexadecyl trimethyl ammonium bromide (CTAB), and N,N-dimethylhexadecylamine (CDA), which are all commercially available compounds. The ferrocene group in FA can be reversibly switched between its oxidized and reduced forms by redox reactions, which would alter the hydrophilic properties of FA. Consequently, by alternately adding H2O2 and NaBH4, WLMs can be reversibly destoryed and reformed because of the redox-responsiveness of FA. Moreover, WLMs can also be switched on and off by cyclically bubbling CO2 and N2, resulting from the reversible protonation of CDA. The multi-stimuli responsive WLMs (CTAB-FA-CDA) may have potential applications in oil recovery and fluid drag reducers.
研究领域:
化学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuan Li,Yang Zhou,Yuze Zhang,Xiaoqing Wang,Jinping Li,Jiangfeng Yang
Although zeolite adsorbents are widely used for gas separation, current studies predominantly focus on single-phase topological structure. Herein, an intergrowth T zeolite with ERI and OFF topologies was synthesized in a template-free system, and the results showed the CH 4 adsorption capacity and CH 4 /N 2 selectivity were 34.4 cm 3 /g and 5.3 (298 K, 1 bar), respectively. The exceptional performance was attributed to its high microporosity and the 6-member ring (6-MR) structure at the intergrowth interface, which synergistically optimize the distribution of adsorption sites, as evidenced by density functional theory (DFT) calculations. Breakthrough experiments demonstrated that intergrowth T zeolite can effectively separate CH 4 /N 2 mixtures (50/50 and 20/80; v/v) with actual separation times of 7.0 min and 10.4 min. Furthermore, two-bed six-step pressure swing adsorption (PSA) simulations further indicated that 20 % of the pristine CH 4 could be enriched to over 50 %, with a recovery rate of 87 %, demonstrating significant potential for upgrading low-concentration coal-bed methane.
研究领域:
化学工程
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材料科学
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物理化学
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分离技术
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能源工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Lifang Chen,Haiyang Zheng,Aimin Li,Xin Qiu,Lian Wang
The photocatalytic reduction of nitrate has received considerable attention due to its high efficiency and environmentally friendly nature. The excessive addition of hole scavengers is the most commonly used method to increase the nitrate reduction efficiency. However, achieving high selectivity in the photocatalytic reduction of nitrate to N 2 with low concentration of hole scavengers remains challenging. In this study, the SrFe x Ti 1−x O 3 /TiO 2 S-scheme heterojunction photocatalysts with many Lewis acidic adsorption sites have been developed. The experimental results demonstrated that the incorporation of 6% Fe into SrFe 0.06 Ti 0.94 O 3 /TiO 2 (SFTO6) resulted in the nitrate conversion rate of 97.68% and the N 2 selectivity reached 96.35% with 25 mmol/L formic acid . Moreover, it also exhibited excellent stability and recycle ability. After 5 cycles, SFTO6 still exhibited a stable photocatalytic denitration efficiency of 92.94%, highlighting its potential for practical application. Through comprehensive mechanistic investigations, enhancing direct reduction process is considered the key to its high reduction efficiency with low formic acid . And the Lewis acidic adsorption sites enhance N 2 selectivity by enriching NO x − on the surface of the material. Overall, this study provides a novel approach for achieving efficient photocatalytic reduction of nitrate to N 2 under conditions with low concentration of hole scavengers.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Hongda Hao,Jiaxin Li,Song Deng,Bihua Xian,Zheng Tang,Shuo Yang,Jirui Hou
The high-temperature reservoir (105 °C) in the Liubei block of Jidong Oilfield, with severe longitudinal heterogeneity, has entered a high water-cut stage. After a preliminary profile control, the water management of the oilfield still faces serious water channeling problems. To strengthen water management, N2 foam flooding combined with gel plugging for enhanced oil recovery was studied. In this work, considering a high-temperature reservoir of 105 °C, a composite foam system and starch graft gel system with high temperature resistance were screened out, and displacement experiments in one-dimensional heterogeneous cores were carried out. Through the three-dimensional experimental model and numerical model of a 5-spot well pattern, physical experiments and numerical simulations were carried out respectively to study water control and oil increase. The experimental results showed that the foam composite system had good temperature resistance up to 140 °C and oil resistance up to 50% oil saturation and was helpful to adjust the heterogeneous profile in a high temperature of 105 °C. The starch graft gel system had good injection performance, with a solution viscosity of 18.15 mPa·s, and its gel strength could effectively seal the high-permeability layer, with a gel viscosity of 34950.92 mPa·s. The displacement test results showed that after a preliminary implementation of N2 foam flooding, N2 foam flooding combined with gel plugging could still improve oil recovery by 5.26%. Compared with preliminary N2 foam flooding, gel plugging could control the water channeling in the high-permeability zone near the production wells. The combination of foam and gel made N2 foam flooding and subsequent waterflooding divert to flow mainly along the low-permeability layer, which was conducive to enhance water management and improve oil recovery. This method can be used as an effective technology to manage similar heterogeneous reservoirs.
研究领域:
石油工程
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化学工程
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产品关联
DOI
PubMed
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 1
·e12298
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IF 15.122
Fanbo Meng,Jiayao Qin,Xingyu Xiong,Xiangjie Li,Renzong Hu
Metal–N 2 battery can be applied in both energy storage and electrochemical nitrogen reduction reaction (NRR); however, there has been only extraordinarily little study on metal–N 2 battery since its electrochemical reversibility still needs further proofs. And its electrochemical performances also need to be enhanced. Herein, we investigated the discharge–charge reactions between Li anode and N 2 cathode via designing an efficient catalyst of nanosized SnO 2 particles dispersed on N-doped carbon nanosheets (SnO 2 @NC) for the Li-N 2 battery, with good cyclic stability and a high specific capacity of 0.25 mA h (~500 mA h g −1 ) at a large current density of 1000 mA g −1 . The electrochemical reversibility of both NRR in the discharge process and nitrogen extraction reaction in the charge process for Li-N 2 battery is discussed. Time-of-flight secondary ion mass spectrometry results imply that the SnO 2 @NC can effectively promote the adsorption of N 2 and the activation of NRR in the discharge process. Furthermore, ex situ X-ray photoelectron spectroscopy and Fourier transform infrared tests are performed to study the electrochemical reversibility of Li-N 2 battery. It can be proved that the formation and decomposition of discharging product Li 3 N are electrochemical reversible during cycling in our deigned Li-N 2 battery system with SnO 2 @NC catalyst.
研究领域:
能量存储
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电化学
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材料科学
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催化
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2018
·Vol. 2018
·期 8
·1047-1052
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IF 2.507
Xiaoxia Jia,Ning Yuan,Li Wang,Jiangfeng Yang,Jinping Li
Graphical Both high selectivity and adsorption capacity in the adsorptive separation of CO 2 , CH 4 , and N 2 were achieved by means of (CH 3 ) 2 NH functionalization of the unsaturated metal sites of the MOF Ni-HKUST-1. Ni-HKUST-1, with the same topological structure as Cu-BTC (HKUST-1), was synthesized by a (CH 3 ) 2 NH-assisted method. Ni-HKUST-1 with high purity (> 90 %), yield (85 %), and BET surface area (1088 m 2 /g) was successfully synthesized for the first time by using NiCl 2 . The pure-component adsorption isotherms of CO 2 , CH 4 , and N 2 on Ni-HKUST-1 were measured by the volumetric method and the data used to estimate the separation selectivity for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 binary mixtures according to the ideal adsorbed solutions theory. At 273 K and 1 atm, the selectivities for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 were 14.49, 5.36, and 183.41, respectively, and the adsorption capacities for CO 2 and CH 4 were 223.87 and 67.89 cm 3 /g, respectively. This is a rare demonstration of both high selectivity and adsorption capacity in the separation of CO 2 , CH 4 , and N 2 .
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Haodong Xie,Yuan Xue,Lei Zhang,Li Liu,Xiang Ni,Wenwen Song,Jingyun Qian,Lei Wang,Hongjun Zhu
The small pore aluminosilicate zeolites are always accompanied by the abundant framework aluminum content and the consequential extra-framework counterparts severely restrained its application in the gas separation process. In this work, the high-silica zeolite ERI (Si/Al = 7.3) was successfully fabricated using a OSDA in the potassium cation medium. It is found that the spatial distribution of aluminum sites in the ERI zeolite can be effectively tailored in the synthetic system with varying aluminum content. Furthermore, the ERI frameworks with spatially biased aluminum sites were also clarified. By combining multiple spectroscopy techniques and powder X-ray diffraction crystallography, the framework of aluminum sites related to host-guest interactions confined in high-silica ERI was clarified. In the gas separation of a binary mixture of O 2 /N 2 (21:79 v /v), the Sr 2+ cation-exchanged high-silica zeolite ERI exhibited efficient O 2 adsorption capacity: 0.74 mmol·g −1 and IAST selectivity: 2.89. These findings not only provide a structural foundation but also offer a model for the efficient separation of O 2 from multi-component gas mixtures.
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产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Zhe Cheng,Pei Wang,Yunlong Sun,Zhipeng Wang,Guangyuan Zhou
Gas separation membranes have a wide range of applications in industry, and there are two important factors in judging membrane standards permeability and selectivity. How to improve the selectivity of gas separation membranes while improving permeability is a challenge. In this study, poly (aryl ether sulfone) (PES) block copolymers were synthesized from fluorine-terminated polysulfone (PSF–F) and hydroxyl-terminated cardo PES containing phenyl substituted isoindolinone side group (PES-PPI-OH). Large side groups can enlarge the free volume and hinder chain movement to improve gas permeation behavior. Solvent-induced microphase separation of block copolymers by casting membranes with solvent benzyl alcohol (BA) can improve selectivity. The PSF- b -PES-PPI (10:10) BA membrane maintain good mechanical properties and tensile strength up to 93 MPa which compared to random polymer membrane rises to 14 MPa. Gas permeation at 23 °C showed that the O 2 /N 2 selectivity of PSF- b -PES-PPI (5:15)BA membrane was 10.6, which was the 2008 Robeson upper bound. Thus, poly (aryl ether sulfone) materials showed great potential application for O 2 /N 2 separation.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Siraj Ahmad,Shaohan Lian,Yaxin Tan,Run Li,Quan Zhao,Chunfeng Song,Qingling Liu,Shijian Lu
Mixed matrix membranes (MMMs) have gained significant attention in CO 2 separation. However, the symmetrical dispersion of inorganic filler nanoparticles during MMMs fabrication is still a crucial challenge. The present work investigates the outcome of N-Methyl-2-pyrrolidone (NMP) and N-N-Dimethyl-formamide (DMF) solvents on MMMs texture, perm-selectivity and nanoparticles dispersion. Scanning electron microscopy (SEM), Fourier-transform-infrared (FTIR) and X-Ray Diffraction (XRD) analyses were also performed for membrane characterization. The MMMs fabricated with NMP solvent showed competitive CO 2 permeability (120.20 barrer) and CO 2 /N 2 selectivity (69.31) compared to the membranes prepared with DMF solvent. It has been indicated that the molar volume, boiling point and solubility parameters were significant factors in the solvent selection. Moreover, the effect of operating temperature on gas transport properties showed substantial impact in perm-selectivity, at 3 bar feed-pressure, with the temperature dropping from 40 °C to 0 °C, the CO 2 /N 2 gases selectivity increased from 69.31 to 105.50, equating to a 64.8% decrease in CO 2 permeability.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Fei Guo,Dongsheng Li,Rui Ding,Jiaming Gao,Xuehua Ruan,Xiaobin Jiang,Gaohong He,Wu Xiao
Two-dimensional nanomaterials have the characteristics of high aspect ratio and high space utilization, which has huge potential advantages in gas separation. In this work, g-C 3 N 4 two-dimensional nanosheets with sieving pore structure were selected as templates and combined with ZIF-90 to construct a 0-dimensional/2-dimensional composite material ZIF-90@C 3 N 4 (ZCN). The complete two-dimensional g-C 3 N 4 nanosheets were stripped under acid etching conditions at 25 °C. ZIF-90 was distributed in an orderly manner on the two-dimensional nanosheets, and the nanosheets were spread out due to the growth of ZIF-90 to provide more free volume. The gas permeation experiment proved that the ZCN has a better CO 2 /N 2 separation performance. The ZCN/Pebax mixed matrix membrane (MMM) with the optimized 8.0 wt% ZCN loading showed an improved CO 2 permeability of 110.5 Barrer and a CO 2 /N 2 selectivity of 84.4, surpassing the Robeson upper bound (2008). The results demonstrated that the designed composite filler with 2D nanosheets is an effective strategy to enhance gas separation performance of MMMs and verified the application potential in gas purification industry.
研究领域:
材料科学
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化学工程
·
气体分离技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 44
·17267-17274
·
IF 3.069
Pengcheng Su,Xu Zhang,Zehai Xu,Guoliang Zhang,Chong Shen,Qin Meng
Recently, great improvements have been achieved in the fabrication of adsorbents. However, designing adsorbents with high adsorption capacity and superior selectivity still remains a big challenge. In the present study, a novel cost effective NH2-HCP adsorbent for toxic dyes and CO2/N2 separation was facilely synthesized through the one-step Friedel–Crafts alkylation reaction of m-phenylenediamine (MPD). The adsorption process under different adsorption parameters, namely, contact time and initial dye concentration were investigated in detail to explore the adsorption characteristics of the NH2-HCPs. Moreover, the experimental results demonstrated that the equilibrium adsorption isotherm and adsorption kinetics for anionic dye adsorption onto the NH2-HCPs fitted well with the Langmuir model and pseudo-second-order model, respectively. With a mesoporous structure and a high density of active amino groups, the amino-functionalized hypercrosslinked polymers (NH2-HCPs) not only showed an unprecedented adsorption capacity of 3290 mg g−1 for the anionic dye X-3B and almost no adsorption toward the cationic dye, but also possessed an excellent CO2/N2 selectivity of 122.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yun Liu,Guijiang Liu,Lichuan Chen,Song Hong
Graphical Nitrogen-doped iron-based nanoparticles (Fe NPs-N@C), characterized by the presence of Fe8−N2 active sites, are synthesized to exhibit oxidase-like activity, facilitating the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to yield the blue product, oxTMB. Designing metal nanoparticles with oxidase-mimicking capabilities has garnered significant attention due to their promising attributes. However, understanding the intricate catalytic mechanisms underlying these nanoparticles poses a formidable challenge. In this study, a straightforward pyrolysis procedure was employed to synthesize nitrogen-doped iron-based nanoparticles (Fe NPs-N@C) with Fe8−N2 serving as active sites. The confirmation of these sites was thoroughly confirmed through density functional theory (DFT) calculations complemented by experimental validation. The resulting Fe NPs-N@C nanoparticles, averaging 5.45 nm in size, exhibited excellent oxidase-mimicking activity, with v max =1.11×10 −7 M s −1 and k m =1.67 mM, employing 3,3′,5,5′-tetramethylbenzidine as a substrate. The oxidation pathway and catalytic mechanism of Fe NPs-N@C involved 1O 2 ⋅ radicals, validated through electron paramagnetic resonance analysis and DFT calculations. Furthermore, Fe NPs-N@C/TMB system was devised for ascorbic acid and nitrite quantitative detection. This method demonstrated the capability to detect ascorbic acid within concentrations ranging from 1 to 55 μM, with a limit of detection (LOD) of 0.81 μM, and nitrite within concentrations from 1 to 160 μM, with a LOD value of 0.45 μM. These findings offer a comprehensive understanding of the catalytic mechanisms of Fe NPs-N@C nanoparticles at the atomic level, along with its potential for colorimetric sensor in future.
研究领域:
材料科学
·
生物化学
·
催化化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）