MOLECULAR SIMULATION
·
2019
·
IF 1.782
Hengjiang Liu,Yu Liu,Yazhuo Shang,Honglai Liu
Mixed surfactants have potential applications in various fields. The understanding and prediction of their macro- and microscopic properties are of great importance in the designing of these materials. We used molecular dynamics (MD) and experiments to study the interfacial tension and the microscopic structures of the sodium dodecyl sulfate (SDS)/C4mimBr mixed surfactant at the water/hexane interface. The interfacial tension, density profile, radial distribution function (RDF), orientation distribution of the tails and order parameters have been examined. It seems that the addition of C4mimBr decreased the interfacial tension; a higher C4mimBr concentration resulted in a thicker interface, a smaller droplet, and more disordered SDS tails. The competition between free volume and electrostatic shielding seems to be the primary mechanism behind these phenomena.
研究领域:
物理化学
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材料科学
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
Energies
·
2022
·Vol. 15
·期 18
·6540
·
IF 3.252
Yan Li,Alberto Maria Gambelli,Federico Rossi
CO2hydrate formation and dissociation are the fundamental processes for investigating hydrate-based carbon storage. To better understand CO2hydrate phase behaviors in the presence of surfactant and solid additives, this study reports the effects of Sodium Dodecyl Sulfate (SDS) and micron Cu particles on the formation of CO2hydrates in the presence of porous quartz sands in a lab-scale reactor. This research is part of a wider study focused on defining the properties of solid additives, produced via gas-atomization, on the formation and dissociation of gas hydrates. The morphology of CO2hydrate formed in SDS solution shows dispersed crystal particles due to the increase of surface tension. SDS works as the kinetic promoter on CO2hydrates formation whereas the addition of Cu particles inhibits CO2gas consumption. The mixture additives show a faint kinetic inhibit effect, in which the Brownian motion restrictions may be responsible for the inhibition of CO2hydrate production. The solid additives also showed a weak thermodynamic effect on CO2hydrate phase equilibrium.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 12
·3174
·
IF 5.076
Beibei Yang,Tian Qin,Ziping Bao,Wenqian Lu,Jiayu Dong,Duan Bin,Hongbin Lu
It is well-known that platinum (Pt) is still the preferred material of anode catalyst in ethanol oxidation, however, the prohibitive high cost and CO poisoning of Pt metal impede the commercialization of fuel cells. Therefore, improving the utilization rate of catalysts and reduce the cost of catalyst become one of the most concerned focus in the construction of fuel cells. In this work, the Pt-based catalysts are synthesized by using different content of sodium dodecyl sulfate (SDS) modified-Ti3C2Txsupport, and the dispersion regulation function of SDS modified-Ti3C2Txsupported on Pt nanoparticles is investigated. The structure, composition and morphology of different catalysts are characterized by X-ray diffraction (XRD), X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution TEM, respectively. It is found that the Pt nanoparticles in pure Ti3C2Txsurface are serious aggregated and show poor dispersion, whereas the Pt nanoparticles in SDS modified-Ti3C2Txhave a better dispersion. The electrochemical results revealed that SDS modified-Ti3C2Txsupported Pt nanoparticles has higher electrocatalytic activity and stability in both acidic and alkaline ethanol oxidation when the dosage of SDS increases to 100 mg. These findings indicate that the SDS-Ti3C2Tx/Pt catalysts show a promising future of potential applications in fuel cells with modification of Ti3C2Txsupport.Keywords:ethanol oxidation;sodium dodecyl sulfate (SDS) modified-Ti3C2Tx;Pt nanoparticles;dispersion;electrocatalytic activity
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Shuangqing Sun,Xiqiang Zhang,Shengxiang Feng,Hongbing Wang,Yan Wang,Jianhui Luo,Chunling Li,Songqing Hu
A novel CO 2 /N 2 switchable aqueous foam was developed using a CO 2 -responsive surfactant N,N-dimethyl-N-dodecyl amine (C 12 A) and a conventional surfactant sodium dodecyl sulfate (SDS). The performance and mechanism of this switchable foam were studied by both experiment and molecular simulation methods. Experimental results demonstrate that the foam stabilized by SDS/C 12 A surfactants has better stability and water carrying capacity than single C12A foam. The foam could be rapidly switched between stable and unstable states at ambient temperature with CO 2 or N 2 as the triggers. Simulation results shows that when CO 2 was introduced, most of SDS and C 12 A molecules aggregated in the water phase, instead of adsorbing at the air-water interface to stabilize the foam films. The strong electrostatic attraction between protonated C 12 A and SDS molecules could account for the aggregation. Due to the presence of limited surfactants located at the air-water interface after introducing CO 2 , the foam bursts quickly.
研究领域:
化学
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材料科学
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胶体与表面化学
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分子模拟
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ningkuan Zhong,Weiyi Wu,Fen Xu,Lixian Sun,Yi Wu,Jianhao Lao,Xiaohui Qin,Yu Wang,Xiangpeng Ding,Aicheng Peng,Jincheng Liu,Dingding Yuan
In this work, a flower-like porous Ni-MOF BDC @C (MOFs@C SP ) has been synthesized successfully on carbon material through two surfactants (SDS and PVP) control by means of a facile solvothermal method. SEM results reveal that the MOFs@C SP is the porous material that bends and folds into the flower shape of Ni-MOF nano sheets orientated grown on the carbon materials. The results also illustrate that the carbon material plays the role of template and conductive reinforcing agent. Under the action of carbon and double surfactants, the MOFs@C SP has the highest specific capacity and the lowest resistance of charge transfer in the four Ni-MOF BDC materials (namely MOFs@C SP , MOFs@C P , MOFs@C S and Ni-MOF BDC ). That is the specific capacity of MOFs@C SP is 1350.1 F g -1 at 1 A g -1 , corresponding to resistance of charge transfer of 0.3 Ω. Moreover, the energy density of the asymmetric device assembled by MOFs@C SP is 42.9 Wh kg -1 under 813.1 W kg -1 .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2023
·
IF 1.5
Yan Chen,AL-Maamari Zaher Adel,Yahan Wang,Yunjie Wang,Gavkhara Ismoilova
The foam performance of hydrophilic nanoparticles SiO2/SDS (Sodium Dodecyl Sulfonate) foam about temperature and salinity had been assessed by experiments. The concentration of Na+, Ca2+, and Mg2+ ions on foaming volume and foam half-life were verified, and the mixing dispersions with Na+, Ca2+, and Mg2+ concentration of 8:1:1 was researched the IFT, elastic modulus and foam strength by FoamScan for plugging ability. The mixing dispersions of no salinity and Na+, Ca2+, and Mg2+ of 8:1:1 were used to verify the salinity effects on foam properties by building hydrophilic SiO2 nanoparticles at the Gas-liquid interface. The flooding ability of two different foam dispersions was compared to enhance oil recovery. The flooding ability of two surfactant dispersions to oil molecules was verified by building the oil flooding models. In conclusion, the best foam performance condition was 30°Cand the sensitivity to hydrophilic SiO2/SDS dispersions could be summed up as: Ca2+> Mg2+ > Na+, hydrophilic SiO2/SDS foam dispersions with Na+, Ca2+, Mg2+ concentration of 8:1:1 had better foam stability and plugging ability at the salinity of 7.5 × 104∼12.5 × 104mg/L. The oil recovery increased from 53.62% to 68.54%, and simulation results showed that the removal of oil molecules was more efficient in mixed dispersions.
研究领域:
石油工程
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材料科学
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界面化学
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Li Wu,Qijie Mo,Shoulian Wei,Ruiping Gao,Shuai Zhang,Xiaohua Zhu
This study demonstrates a novel colorimetric method for clenbuterol (CLB) detection based on the peroxidase-like activity of SiO 2 -coated Fe 3 O 4 nanoparticles (Fe 3 O 4 @mSiO 2 ) modified with montmorillonite (MMT) and sodium dodecyl sulfate (SDS), namely, Fe 3 O 4 @mSiO 2 @MMT-SDS. Fe 3 O 4 @mSiO 2 @MMT-SDS nanoparticles were prepared by modifying Fe 3 O 4 @mSiO 2 with MMT and SDS to impart negative charges to the particle surfaces. The structural properties, steady-state kinetics, catalytic performance, and reaction conditions of the as-prepared nanoparticles were analyzed. Fe 3 O 4 @mSiO 2 @MMT-SDS nanoparticles exhibited excellent dispersion and enzyme-like activity, which improved the affinity with substrate (TMB and H 2 O 2 ) for the catalytic oxidation of CLB by H 2 O 2 , turning the solution blue in the presence of the 3,3ʹ, 5,5ʹ-tetramethylbenzidine chromogen. Under optimal reaction conditions, a strong linear correlation between the absorbance of solution and CLB concentration (R 2 = 0.9983) was observed. Here, the limit of detection, spike recovery, and relative standard deviation were 9.6 × 10 -9 mol · L -1 , 94.2 %–102.2 %, and 2.2 %–4.4 %, respectively. The proposed method is a simple, fast, cost-efficient, and sensitive assay, which can be used to rapidly and accurately screen CLB in pork and animal feeds.
研究领域:
分析化学
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食品安全
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生物医学工程
✓ 已验证
DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2023
·Vol. 60
·期 3
·245-252
·
IF 1
Ying Li,Yifan Zhang,Lewu Zhan,Jing Hou,Bindong Li
The effects of different surfactants on the morphology of 1,3,5-trinitro-1,3,5-triazinane (RDX) micro-nanoparticles prepared by solvent/non-solvent method in a microfluidic reactor were investigated. Alkyl polyglycoside (APG), sodium dodecyl sulphate (SDS) and dodecyltrimethylammonium bromide (DTAB) were selected as non-solvents. The surface tension and interfacial tension (IFT) properties of SDS, APG and DTAB were investigated. Compared to DTAB and SDS, the APG could effectively reduce the interfacial tension to 10 −2 mN/m and exhibited better surface tension. The RDX prepared with different surfactants were analysed by scanning electron microscopy (SEM), X-ray diffractometry (XRD) and Fourier transform infrared spectrometry (FTIR). The results showed that the different surfactants could significantly improve the dispersion effect of RDX and the crystal morphology was uniform and stable.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Teng Lu,Zhaomin Li,Liping Du
This study explores the combined application of hydrophobic silica aerogels and SDS to enhance CO 2 storage capacity and oil recovery. Experimental data highlighted a marked increase in CO 2 solubility within silica aerogel-SDS nanofluids compared to brine and SDS solutions. Molecular dynamics simulations revealed CO 2 adsorption into nanopores. Silica aerogel nanoparticles extended CO 2 foam half-life by 6 % versus 62 % decline for sole SDS foam from 30 to 140 °C. Adjusting the SDS to nanoparticle ratio affects foam properties, with a ratio of 1.5 yielding optimal results. Core flooding experiments demonstrated a 75 % rise in CO 2 trapping efficiency using the nanofluids over SDS solutions. Two-dimensional tests showed aerogel-SDS foam surpassed SDS foam flooding by 12 % incremental oil recovery in upper layers, attributed to enhanced profile control. The combined agents present an effective approach for geological CO 2 storage and EOR optimization.
研究领域:
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenlan Ji,Yuan Wang,Yuanjie Xiong,Tian C. Zhang,Shaojun Yuan
To strengthen the utilization of free radicals and effectively enhance electrocatalytic performance and service lifetime of the β -PbO 2 electrode, herein, a novel hydrophobic TNAs/SnO 2 /PPy/ β -PbO 2 -Ce-SDS (abbreviated as β -PbO 2 -Ce-SDS) anode was synthesized by doping Ce 3+ and anionic surfactant (SDS) to TNAs/SnO 2 /PPy/ β -PbO 2 (abbreviated as β -PbO 2 ), which was constructed by growing SnO 2 /PPy/ β -PbO 2 multilayers on TiO 2 nanotube arrays (TNAs) via combination of electrodeposition and electro-polymerization processes. Notably, co-modification with Ce 3+ and SDS remarkably enhanced the surface hydrophobicity, electrochemical performance and catalytic ability of β -PbO 2 anode. Such β -PbO 2 -Ce-SDS anode not only substantially enhanced the As(III) conversion (96.96%) in the electrocatalytic oxidation process, but also prominently strengthened its service lifetime. Furthermore, the as-prepared β -PbO 2 -Ce-SDS anode possessed an excellent stability as its kinetic constant was only reduced from 0.18 to 0.14 min −1 even underwent 10 cycles of the electrocatalytic process, while that of the unmodified β -PbO 2 electrode decreased markedly by about 49%, owing to its appropriate surface hydrophobicity, smaller grains and denser β -PbO 2 layer. The reaction mechanism of electrocatalytic oxidation was associated with synergistic effects of hydroxyl radical ( OH), superoxide radicals ( O 2 − ), and sulfuric acid root radicals ( SO 4 − ). The β -PbO 2 -Ce-SDS anode provides a novel and feasible approach to development of various electrodes by doping metal ions and/or regulating with surfactants.
研究领域:
电化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
·
2020
·Vol. 113
·期 10
·1467-1477
·
IF 2.674
Yin Yi-Rui,Sang Peng,Yang Feng-Li,Li Tao,Yang Run-Feng,Liu Hong-Yan,Luo Zong-Long,Li Wen-Jun,Yang Li-Quan
A β-glucosidase gene ( bsbgl1a ) from Bacillus sp. CGMCC 1.16541 was expressed in Escherichia coli BL21 and subsequently characterized. The amino acid sequence shared 83.64% identity with β-glucosidase (WP_066390903.1) from Fictibacillus phosphorivorans . The recombinant β-glucosidase (BsBgl1A) had a molecular weight of 52.2 kDa and could hydrolyze cellobiose, cellotriose, cellotetrose, p-nitrophenyl-β- d -glucopyranoside ( p NPG), and p-nitrophenyl-β- d -xylopyranoside ( p NPX). Optimal activity for BsBgl1A was recorded at 45 °C with a pH between 5.6 and 7.6, and 100% of its activity was maintained after a 24 h incubation between pH 4 and 9. Kinetic characterization revealed an enzymatic turnover (Kcat) of 616 ± 2 s −1 (with cellobiose) and 3.5 ± 0.1 s −1 (with p-nitrophenyl-β- d -glucopyranoside). Interestingly, the recombinant enzyme showed cupric ion (Cu 2+ ), sodium dodecyl sulfate (SDS) and alcohol tolerance at 10 mM for Cu 2+ and 10% for both SDS and alcohol. Additionally, BsBgl1A had high tolerance for glucose (Ki = 2095 mM), which is an extremely desirable feature for industrial applications. Following the addition of BsBgl1A (0.05 mg/ml) to a commercial cellulase reaction system, glucose yields from sugarcane bagasse increased 100% after 1 day at 45 °C. This work identifies a Cu 2+ , SDS, alcohol, and glucose tolerant GH1 β-glucosidase with potential applications in the hydrolysis of cellulose for the bioenergy industry.
研究领域:
酶学
·
微生物学
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生物技术
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
·
2019
·
IF 2.237
Ying Gong,Jiping Chen,Rongping Pu
Surfactant is an emerging and popular pollutant in both rural and urban areas and its treatment efficacy by phytoremediation is rarely reported. Water hyacinth was utilized to clean anionic surfactant sodium dodecyl sulfate (SDS) in water and its growth and physiological activities were regulated with Chromolaena odorata L. extract. SDS was effectively removed from the water and then transferred to both root and aerial part of water hyacinth. Part of SDS was converted into low-molecular weight degradation intermediates by the hydrogen abstraction reactions in water hyacinth. The removal efficiency and the degradation of SDS were evidently strengthened accompanying with enhanced root activity and ascorbate peroxidase (APX) activity in the presence of Chromolaena odorata L. extract. Meanwhile, the growth of water hyacinth was effectively controlled, exhibiting low-growth rate (≤0.036 g.day−1). Furthermore, the root was considered as the major organ to degrade SDS, which was correlated to the remarkable increase in APX activity and a slight increase in root activity under both SDS and extract stress. In conclusion, water hyacinth managed with Chromolaena odorata L. extract should be proposed as an eco-friendly biotechnical treatment for the surfactant.
研究领域:
环境科学
·
生物技术
·
废水处理
·
植物修复
✓ 已验证
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）