DESALINATION
·
2023
·
IF 9.9
Xiaojuan Wang,Kuisuo Yang,Huacheng Xu,Yijun Huang,Congjie Gao,Xueli Gao
Novel acyl chloride monomer 5-(1-pyrrolidinyl)-1,3-benzenedicarbonyl dichloride (PIPC) featuring a rigid pyrrolidinyl group was proposed as an organic phase monomer to fabricate reverse osmosis (RO) membranes possessing exceptional water permeability and NaCl rejection via a two-step interfacial polymerization method. First, m -phenylenediamine (MPD) in the aqueous phase solution polymerized with PIPC in the first organic phase solution to form the much looser polyamide . After that the remaining MPD continued to diffuse to polymerize with trimesoyl chloride in the second organic phase solution to form the denser polyamide. The pyrrolidinyl group had steric hindrance effects and formed hydrogen bond with MPD, leading to decreasing the thickness significantly and increasing surface roughness of the separating layer. When the PIPC amount was 0.08 wt%, the PIPC-based RO membrane displayed optimal permselectivity with water flux increasing by 84.20 % compared to the original RO membrane (from 20.38 L·m −2 ·h −1 to 37.54 L·m −2 ·h −1 ) whereas retaining high NaCl rejection with 98.59 %. The PIPC-based RO membrane exhibited steady water flux and NaCl rejection within 120 h of filtration, as well as improved antifouling performance. Thus, preparation of the highly permeable RO membrane could be rationally achieved by the novel acyl chloride monomer with a rigid pyrrolidinyl group.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Small
·
2024
·
IF 13
Yuting Xiao,Geng Chen,Bin Shi,Qing Chang,Limin Zhang,Hongjing Wu
The direct application of liquid marbles in electromagnetic wave (EMW) absorption is challenging due to their poor stability, susceptibility to gravitational collapse, and shaping difficulties. To address this issue, a novel strategy is proposed to incorporate liquid marble microstructures (NaCl/nano-SiO 2 ) encapsulated in organic phases (Octadecane) into the rubber-matrix (SEBS) using the ultrasound-assisted emulsion blending method. The resulting NaCl/SiO 2 /Octadecane microstructures anchored to SEBS offer a substantial solid–liquid interface consisting of NaCl solution and SiO 2 . When subjected to an alternating electromagnetic (EM) field, the water molecules and polysorbate within SiO 2 exhibit heightened responsiveness to the EM field, and the movement of Na + and Cl − within these microstructures leads to their accumulation at the solid–liquid interface, creating an asymmetric ion distribution. This phenomenon facilitates enhanced interfacial polarization, thereby contributing to the material's EMW absorption properties. Notably, the latex with 16 wt% SEBS (E-3), exhibiting a surface morphology similar to human cell tissues, achieves complete absorption of X-band ( f E = 4.20 GHz, RL min = −33.87 dB). Moreover, the latex demonstrates light density (0.78 g cm −3 ) and environmental stability. This study not only highlights the predominant loss mechanism in rubber-based wave-absorbing materials but also provides valuable insights into the design of multifunctional wave-absorbing materials.
研究领域:
材料科学
·
电磁学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2018
·
IF 3.609
Jun Xiao,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
A one-pot, solvent-thermal process was used to create the ultrafine ZnFe 2 O 4 nanoparticles photocatalyst . During the solvent-thermal process, the in situ self-forming NaCl not only served as a “cage” to confine the ion diffusion, but also acted as a microreactor for nanocrystallite growth. An average particle size of ∼10 nm and a high-specific surface area of ∼112.9 m 2 /g were observed for the ultrafine ZnFe 2 O 4 nanoparticles Owing to the synergistic effect of ultrafine particle size, the full utilization of the visible light region and high conduction band (CB) position, ultrafine ZnFe 2 O 4 photocatalyst displayed an efficient photocatalytic CO 2 reduction under visible light illumination. Besides, the ultrafine ZnFe 2 O 4 photocatalyst showed high production selectivity for CH 3 CHO and C 2 H 5 OH generation in aqueous CO 2 /NaHCO 3 solution. This work may provide a new idea for the synthesis of new high-efficiency photocatalysts.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Jinsong Shi,Nanfu Yan,Hongmin Cui,Jianguo Xu,Yuewei Liu,Shaowei Zhang
Because of their high stability, low cost, and tunable porosity, porous carbons are of great interest as CO2 adsorbents. The influences of porosity and heteroatom doping on CO2 adsorption depend on the specific adsorption conditions. In the current work, nitrogen and sulfur co-doped carbons were prepared with the assistance of an NaCl template, and the effects of different physicochemical parameters on CO2 adsorption at 20 bar were investigated. The co-doped carbons were synthesized with sodium lignosulfonate as the starting material and urea as the nitrogen source. The material showed a high specific surface area and pore volume of 973 m2/g and 0.50 cm3/g, respectively. Sulfur-doped carbons were also prepared without the addition of urea. Sulfur doping demonstrated positive effects on CO2 adsorption at a low pressure. The sulfur-doped carbons showed adsorption properties similar to those of the co-doped carbons. The CO2 uptake at 298 K and 20 bar was in the range of 4.3–7.5 mmol/g. The experiment results also revealed that the uptake at 20 bar correlated to the specific surface area of the carbon, while the doped heteroatoms only had secondary influences.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Chao Wang,Qilin Zhang,Yanglei Chen,Xueming Zhang,Feng Xu
The economically viable synthesis of levulinic acid (LA), a promising and valuable renewable biomass-derived platform for bioproducts, with high carbon efficiency is a challenge. A direct and highly effective catalytic system for conversion of xylose residues (XRs) into LA under mild conditions by using FeCl3 as catalyst and cheaply available NaCl as promoter has been developed. The NaCl solution exhibits high carbon efficiency in LA (68.0 mol %) when compared with the non-NaCl systems (48.5 mol %) due to the moderate increase of the acidity and the higher viscosity of the NaCl system than water. The experimental results demonstrated that the presence of NaCl caused no distinctive changes on reaction pathways but increased the dissolution rate and the hydrolysis rate of XRs cellulose. Moreover, further integration of our degradation process with a reactive extraction step makes energy-efficient separation of LA. The NaCl solutions easily and efficiently extracted LA into LA-derived solvent 2-methyltetrahydrofuran from aqueous solutions. The efficiency and integration of the reaction process presented a great potential for LA production from renewable biomass with the aid of concentrated seawater.
研究领域:
生物质化学
·
催化化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Jianqiang Wang,Hao Guo,Xiaonan Shi,Zhikan Yao,Weihua Qing,Fu Liu,Chuyang Y. Tang
We report a novel membrane surface modification method using a fast polydopamine coating (fPDAc) strategy. Specifically, NaIO 4 was introduced in the coating process to accelerate the polydopamine deposition rate . Surface properties and separation performances of fPDAc-coated reverse osmosis membranes were characterized and compared to those obtained using the conventional slow polydopamine coating (sPDAc) strategy. Quartz crystal microbalance measurements showed greatly increased polydopamine deposition rate using the fPDAc method, resulting in a reduction of 97% coating time to reach an areal mass of 2000 ng/cm 2 . Both fPDAc and sPDAc enhanced the surface hydrophilicity and reduced the membrane surface charge. At relatively low areal mass deposition (<1000 ng/cm 2 ), fPDAc-coated membranes showed improved NaCl rejection together with only mild loss of pure water flux. Nevertheless, this rejection enhancement effect was not noticeable when extensive polydopamine coating was applied due to the undesirable cake-enhanced concentration polarization effect. The extensive polydopamine coating was further accompanied with severe loss of membrane permeability, suggesting that shorter coating time (e.g., 4 min) is preferred using the fPDAc method. Our study provides a more rapid and effective membrane surface coating method compared to the conventional sPDAc method.
研究领域:
材料科学
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环境工程
·
膜技术
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yong Wang,Gongqing Chen,Fangzhou Yang,Zihao Luo,Bihe Yuan,Xianfeng Chen,Liancong Wang
Transparent chitosan (CS) film is prepared and its application in high temperature/fire warning is discussed. NaCl-doped chitosan (CS-NaCl) film shows excellent performance in real-time temperature monitoring and fire warning. The temperature warning of CS-NaCl film can be triggered under approximately 50 °C, and it has a good repeatable warning performance under high-temperature conditions. The CS composite film exhibits an ultra-sensitive (0.4 s) warning under fire attacking. A possible electrical conduction and fire-alarm mechanisms are proposed. The addition of NaCl increases the number of charge carriers, which improves the ionic conductivity of the composite film. This study provides a possibility for the application of CS in the field of fire warning.
研究领域:
材料科学
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火灾安全
·
生物材料
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DOI
PubMed
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Baojin Yang,Shimin Dang,Haichao Li
In this study, carbon nanorods (CNRs) were synthesized via a surfactant@salt self-assembly strategy, overcoming the limitations of conventional carbon nanomaterials in morphology control. Sodium dodecylbenzenesulfonate (SDBS) served as the carbon precursor, while sodium chloride (NaCl) acted as a structural spacer to guide nanorod formation. The synthesized SDBS@NaCl CNRs were systematically characterized by SEM, XPS, FT-IR, XRD, and Raman spectroscopy. The results demonstrate that amorphous carbon nanorods with a partially graphitized ordered structure have been successfully synthesized. The CNRs feature dominant oxygen-containing functional groups (C–O, C = O), uniform diameters (∼60 nm), and tunable lengths (1200 ± 400 nm), achieving an exceptional L/D ratio of up to 30. This work not only validates the efficacy of the salt-mediated self-assembly approach but also underscores its potential for designing advanced carbon nanostructures with tailored dimensions and surface properties, paving the way for multifunctional applications in energy storage and catalysis.
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 7
·6201-6217
·
IF 1.5
H.X. Liu,B.Y. Hu,Y. Chen,Y.W. Liu,Y. Xie,L. Zhang,Z.N. Yang
This paper deals with the investigation of the effect of immersion time on copper corrosion in neutral NaCl solution in presence of benzotriazole using electrochemical impedance spectroscopy (EIS) and electrochemical noise analysis (ENA). EIS results indicated that the corrosion process of copper in neutral NaCl solution in presence of benzotriazole can be classified into five steps in our experimental condition. New parameter of corrosion active energy C AE is proposed from EN analysis to further study the effect of immersion time on copper corrosion in neutral NaCl solution in presence of benzotriazole, which almost shows the opposite variation trend with charge transfer resistance with immersion time.
研究领域:
腐蚀科学
·
电化学
·
材料科学
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Zipeng Zhang,Kangping Cui,Libei Zhu,Jiao Wang,Youde Zhang
NaCl-induced crystallization recovered Na 2 SiF 6 from real glass-thinning wastewater. • H 2 SiF 6 -equivalent removal was 95.50%; recrystallization mass recovery was 54.96%. • Recrystallization increased Na 2 SiF 6 content to 99.52 wt%, meeting GB/T 23936-2018. • Apparent whole-process recoveries were 24.54% for F and 51.19% for Si. Recovering resources from real glass-thinning etching wastewater is challenging because of its high acidity and complex ionic composition. This study developed a NaCl-induced crystallization–recrystallization process for selective Na 2 SiF 6 recovery and evaluated NaCl dosage, stirring time, temperature, and recrystallization solid-to-liquid ratio. The wastewater contained 29.439 g L -1 total F, 3.269 g L -1 dissolved Si, and 4.33 mol L -1 total acidity. At an NaCl dose of 1.2 times the stoichiometric requirement, 40 °C, and 45 min, primary crystallization achieved a dissolved-Si-based H 2 SiF 6 -equivalent removal efficiency of 95.50 ± 0.08% and crude-product purity of 91.30 ± 1.26%. The Avrami model empirically described the depletion kinetics (R 2 = 0.99991). Recrystallization at 1:75 (g:mL) provided approximately 55% stage dry-mass recovery and increased Na 2 SiF 6 purity to 99.52 ± 0.08 wt%, meeting GB/T 23936-2018 requirements. An apparent F–Si mass balance showed that the final product retained 24.54 ± 0.19% of wastewater-input F and 51.19 ± 1.91% of wastewater-input Si, distinguishing elemental recovery from liquid-phase removal and product purity. XRD, FTIR, and Raman identified Na 2 SiF 6 as the predominant phase. Thermal decomposition occurred mainly at 500–620 °C and yielded NaF as the predominant detectable solid product. Because the primary mother liquor retained high total-F, SO 4 2- , Cl - , and acidity loads, the process should be regarded as a front-end resource-recovery step requiring downstream mother-liquor treatment.
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DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 12
·1026
·
IF 4.4
Shijing Xie,Min Lei,Jiawei Sun,Chongdou Yang,Wenbo Liu,Di Yun,Xiqiang Zhao,Jie Qiu
The corrosion behavior of 20G and TP347H materials was investigated in molten LiCl-NaCl-KCl salt. The corrosion rates of these materials in molten chloride salt are high and are strongly affected by the alloying surface oxide formation. The 20G shows uniform surface corrosion with almost no protective oxide formation on the surface. In contrast, the austenitic steel TP347H exhibits better corrosion resistance in molten chloride salts due to its high Cr content. Owing to the highly corrosive nature of molten chloride salts, the Cl−in molten salt could react with oxides and alloy, inducing intergranular corrosion of austenitic steel in molten chloride salt environments.
研究领域:
材料科学
·
腐蚀工程
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DOI
PubMed
高影响因子
Gels
·
2026
·Vol. 12
·期 5
·442
·
IF 6.4
Guofan Zeng,Jiaqi Zhu,Zehong Wu,Yihan Qiu,Mingcen Weng
Polyvinyl alcohol (PVA)-based hydrogels suffer from insufficient mechanical strength, while aramid nanofibers (ANF) have intrinsic insulation that limits their sensing applications, and the synergistic effect of composite fillers remains underexplored. This study aims to develop a multifunctional PVA/ANF/NaCl composite organohydrogel for high-performance flexible sensors. The gel was fabricated via freeze–thaw crosslinking, solvent exchange and NaCl impregnation, with systematic investigations of its microstructure, mechanical, electrical and multifunctional sensing properties, and a corresponding triboelectric nanogenerator (TENG) and self-powered handwriting recognition system were constructed. Results show that 2% ANF significantly enhances the gel’s mechanical performance, 0.5 M NaCl achieves optimal mechanical-electrical balance, the gel-based sensor exhibits excellent distance, pressure and strain sensing with high cyclic stability, the TENG delivers stable electrical output, and the recognition system achieves 95% accuracy on the test set. This work provides a new material and design strategy for advanced flexible electronic devices.
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DOI
PubMed
高影响因子
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