COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xiaomeng Chang,Haoxu Yu,Ziai Liu,Zhen Yang,Faze Chen,Yanling Tian
Fluoroalkyl thiols and alkyl thiols are widely used as low surface energy reagents for the preparation of superhydrophobic surfaces and corrosion resistant surfaces. Although the corrosion resistance of thiol-induced superhydrophobic surfaces has been well addressed previously, few studies have devoted to revealing the difference of fluoroalkyl thiol and alkyl thiol modified surfaces towards anti-corrosion. In this work, two types of superhydrophobic surfaces were prepared by respectively coating self-assembled monolayers (SAMs) of 1 H,1 H,2 H,2 H-perfluorodecanethiol (PFDT) and 1-dodecanethiol (DDT) on femtosecond laser engineered copper substrates. The formation mechanism of the SAMs was explained by analyzing the surface chemical composition . The water contact angle of the PFDT and DDT modified surfaces were measured to be 157.7° and 154.6°, respectively. Electrochemical tests showed that both SAMs significantly reduced the corrosion current density ( I corr ) and corrosion rate of the copper surfaces, while simultaneously increased the charge transfer resistance ( R ct ) value by an order of magnitude compared to the pristine copper surface. The surface with PFDT SAM had the smallest I corr and its R ct value was about 1.5 times larger than that with the DDT SAM. These results confirmed that both the SAMs enhanced the anti-corrosion properties of the copper surfaces, and the PFDT SAM was proved to be more effective. Furthermore, the anti-corrosion durability of the PFDT and DDT modified surfaces were compared after exposing them to salt, acid, and alkali solutions for 12 h, and the results showed that the surfaces maintained to be hydrophobic and anti-corrosive, and the PFDT induced superhydrophobic surface indicated better durability. Our results demonstrated that thiols SAMs could significantly improve the anti-corrosion property of structured metal surfaces , and that fluoroalkyl thiol was more desired for long-term anti-corrosive applications in comparison with alkyl thiol.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
高影响因子
Scientific Reports
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2015
·Vol. 5
·期 1
·1-9
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IF 5.578
Guo Xingcui,Guan Jing,Li Bin,Wang Xicheng,Mu Xindong,Liu Huizhou
Ruthenium (Ru) supported on activated carbon (AC) and carbon nanotubes (CNTs) was carried out in the hydrogenolysis of sorbitol to ethylene glycol (EG) and 1,2-propanediol (1,2-PD) under the promotion of tungsten (WO x ) species and different bases. Their catalytic activities and glycols selectivities strongly depended on the support properties and location of Ru on CNTs, owning to the altered metal-support interactions and electronic state of ruthenium. Ru located outside of the tubes showed excellent catalytic performance than those encapsulated inside the nanotubes. Additionally, the introduction of WO x into Ru/CNTs significantly improved the hydrogenolysis activities and a complete conversion of sorbitol with up to 60.2% 1,2-PD and EG yields was obtained on RuWO x /CNTs catalyst upon addition of Ca(OH) 2 . Stability study showed that this catalyst was highly stable against leaching and poisoning and could be recycled several times.
研究领域:
催化
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Jiabing Geng,Yafang Luo,Jiale Song,Hongjie Yu,You Xu,Hongjing Wang,Kai Deng,Ziqiang Wang,Liang Wang
Electrocatalytic reforming of polyethylene terephthalate (PET)-derived ethylene glycol (EG) into high-value glycolic acid (GA) is a potential strategy for PET plastic upcycling, and the efficiency mainly depends on the identification of high-performance electrocatalysts. In this study, we synthesize Ga-incorporated PdCu metallene (GaO x -PdCuene) with an oxygen-bridge structure (GaO x -PdCuene) for the electrolysis of PET hydrolysate towards GA production. GaO x -PdCuene demonstrates an impressive Faradaic efficiency of 98.72 % for GA production at a potential of 0.9 V, along with stable operation for over 100 h. The experimental and theoretical analyses show that the Ga-induced oxygen-bridge structure, accompanying with p-d orbital hybridization, efficiently regulates electronic structure of Pd, which effectively facilitates *OH species generation and optimizes adsorption energies of intermediates on Pd active sites, leading to high activity and selectivity for GA generation. The work highlights the design of oxygen-bridge structure in Pd-based electrocatalysts for efficient conversion of PET wastes to high-value GA product.
研究领域:
材料化学
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环境催化
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可持续能源
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高分子化学
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电化学
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纳米材料
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绿色化学
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Panxing Zhao,Wenbao Liu,Wengang Liu,Lingyun Bao,Yanbai Shen,Stephen Butt,Yahui Zhang
Removal of quartz from hematite by reverse flotation using cationic collectors is an effective approach for iron concentrate upgrading. In this paper, three hydroxyl-containing cationic collectors, i.e., N-Dodecylethanolamine (NDEA), N-Dodecylpropanolamine (NDPA), and N-Dodecylbutanolamine (NDBA), were synthesized and characterized. The flotation performance and the structure-performance relationship of the collectors were systematically investigated by micro-flotation experiments and various surface analysis techniques. At the concentration of 20 mg/L, the flotation recoveries of quartz by NDEA, NDPA, and NDBA were 94.9 %, 93.5 %, and 93.3 %, respectively. Collectors with shorter hydroxyl-substituted carbon chains exhibited stronger collecting ability and enhanced hydrophobicity of quartz surface, as confirmed by contact angle measurements. Zeta potential measurements and molecular simulations revealed that the collectors adsorb onto the quartz surface through electrostatic and hydrogen bonding interactions. The introduced hydroxyl groups could enhance the formation of hydrogen bonds between collectors and mineral surface. However, as the carbon chain length increases, the adsorption area of a single collector on the mineral surface increases, the number of collector molecules adsorbed per unit area decrease, reducing the collecting ability of the collector for quartz. This research could provide theoretical guidance for the design of novel cationic collectors.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
ACS Catalysis
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2022
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IF 13.7
Xuliang Lin,Xing Fei,Dalang Chen,Yi Qi,Quanzhou Xu,Yinchun Liu,Qian Zhang,Sha Li,Tiejun Wang,Yanlin Qin,Xueqing Qiu
The conversion of renewable bioethanol into high-energy-density higher alcohols has become essential for meeting the increasing global demand to achieve carbon neutrality. In this study, Zn- and nitrogen-codoped Ni-based lignin-derived carbon catalysts (NiZn@NC) were prepared by solvent volatile self-assembly and in situ reductive carbonization using pulp and paper waste stream alkali lignin as the carbon source. Lignin amphipathic derivatives with −COOH and −NH2 groups would coordinate with metal ions to form a stable lignin–metal framework; thus, the lignin-derived carbon layer disperses the NiZn bimetallic catalyst and prevents from corroding. At an amination reagent/lignin mass ratio of 1:2, an ethanol conversion of 75.2% and a high alcohol yield of 41.7% were achieved over the Ni20Zn1@NC catalyst. Experimental results and density functional theory calculations showed that Zn doping improved the electronic environment and defect structures of metallic Ni and carbon carrier, which effectively inhibited C–C cleavage and suppressed the byproduct formation, such as methane. Thereby, the synergetic effect between Ni and Zn facilitated the efficient conversion of aqueous ethanol into higher alcohols by the Guerbet reaction. This work provides a strategy of in situ pyrolytic doping and stabilizing of renewable biomass macromolecules as the frameworks for the construction of highly active and cost-efficient catalysts for ethanol upgrading.
研究领域:
催化化学
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可再生资源利用
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材料科学
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DOI
高影响因子
FOOD CHEMISTRY
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2020
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IF 6.306
Christoph Cerny,Hedwig Schlichtherle-Cerny,Romelo Gibe,Yuan Yuan
This study investigated the role of furfuryl alcohol (FFA) in the formation of furfurylthiol (FFT), the most important odorant in roasted coffee, using in-bean and spiking experiments. Green beans were spiked with FFA, and after roasting FFT was quantified by stable isotope dilution analysis. The FFT level in the roasted beans increased dose-dependently with addition of FFA. Additionally, beans were spiked with isotopically labelled d 2 -FFA which generated isotopically labelled d 2 -FFT after roasting. However, no labelled furfural was observed. The results unambiguously show that FFA serves as a precursor of FFT in coffee. On the other hand, the data indicate that furfural stems not from oxidation of FFA and plays no major role as precursor for FFT formation during coffee roasting. The suggested formation pathway leads from FFA to the furfuryl cation, then protein-bound S-furfuryl- l -cysteine and by subsequent elimination to FFT.
研究领域:
食品科学
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化学
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产品关联
DOI
PubMed
高影响因子
Catalysts
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2024
·Vol. 14
·期 4
·223
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IF 3.8
Yuhao Yang,Qiaoyun Liu,Zhongyi Liu
The catalytic conversion of naturally rich and renewable biomass into high-value chemicals is of great significance for pursuing a sustainable future and a green economy. The preparation of pentanediol from furfuryl alcohol is an important means of high-value conversion of biomass. The Pt-based catalyst supported on MgO was applied to the selective hydrogenation of biomass furfuryl alcohol to prepare pentanediol. By adjusting parameters such as catalyst loading, reduction temperature, reaction temperature, and pressure, a highly active catalyst was designed and the optimal catalytic hydrogenation conditions were determined. The hydrogenation experiment results showed that the selectivity of the 2Pt/MgO-200 catalyst for 1,2-pentanediol and 1,5-pentanediol reached 59.4% and 15.2%, respectively, under 160 °C and 1 MPa hydrogen pressure. The catalyst was characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectrometer (XPS), CO2-temperature programmed desorption (CO2-TPD), and other methods. The characterization results indicate that the reduction temperature has a significant impact on the metal Pt, and an appropriate reduction temperature is beneficial for the hydrogenation performance of the catalyst. In addition, the basic sites on the carrier are also another important factor affecting the activity of the catalyst. In addition, stability tests were conducted on the catalyst, and the reasons for catalyst deactivation were studied using methods such as thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR). The results showed that the activity of the catalyst decreased after five cycles, and the deactivation was due to the hydrolysis of the carrier, the increase in metal particle size, and the surface adsorption of organic matter.
研究领域:
生物质化学
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催化科学
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材料科学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2025
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IF 6.3
Jingwen Lan,Zihan Wei,Rukuan Liu,Airong Xu
Although hydrogel sensors have broad application prospects in wearable devices, biomedical electronic skin, human–computer interaction and other fields, the hydrogel sensor with the synergy of robust mechanical behaviors, super freeze-resistant ability and signal output stability still remain challenged. To overcome the challenge, here, a novel hydrogel sensor AICG were developed using polyvinyl alcohol (PVA), glycidyl trimethyl ammonium chloride (EPTAC), polyethyleneimine (PEI) and ethylene glycol (EG). The effects of PVA, PEI, EPTAC and EG contents in AICG hydrogel on mechanical properties were systematically investigated. The notably boosted mechanical properties (antibreakage performance, fatigue-resistant ability) and super freeze-resistant performance are primarily ascribed to the superhydrogen-bond networks of PVA with PEI, EPTAC and EG. The hydrogel is so strong that it can load a 60 Kg boy and endure super low temperature (−120 ℃). Besides rendering AICG hydrogel good conductivity (5.56 mS·cm −1 ), EPTAC was used to graft it on the PVA/PEI macromolecular chains of AICG hydrogel via ring-opening reaction of EPTAC, thus impeding the leakage of EPTAC from the hydrogel as much as possible and improving conductive stability. On being used a sensor, it can accurately detect human joint movements and simulate electronic skin due to high sensitivity and stable signal output ability. It is expected that this study can provide valuable information for the design and fabrication of the hydrogel sensor with desired high performances.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
·
IF 3.7
Yugang Shu,Jiaguang Zheng,Chengguo Yan,Ao Xia,Meiling Lv,Zhenxuan Ma,Zhendong Yao
NaBH 4 was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8% (mass) and high volumetric hydrogen capacity of around 115 g·L –1 . However, it exhibits strong stability and requires temperatures above 500 °C for hydrogen release in practical applications. In this study, two polyhydric alcohols, xylitol and erythritol (XE), were prepared as a binary eutectic sugar alcohol through a grinding-melting method. This binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBH 4 . The 19NaBH 4 -16XE composite material prepared by ball milling could start releasing hydrogen at 57.5 °C, and the total hydrogen release can reach over 88.8% (4.45% (mass)) of the theoretical capacity. When the 19NaBH 4 -16XE composite was pressed into solid blocks, the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L –1 . By controlling the temperature, the hydrogen desorption capacity of the NaBH 4 -XE composite material was controllable, which has great potential for achieving solid-state hydrogen production from NaBH 4 .
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 CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Hao Li,Fengyi Zhang,Qianlong Zhang,Hongjuan Li,Zhiying Wang,Chunli Li,Jing Fang
For some strongly non-ideal solution systems, there are often errors in predicting the phase equilibrium relationship of a multi-component system using the interaction parameters obtained by the regression of the phase equilibrium data of the binary system. The interaction parameters between the components obtained by directly determining the phase equilibrium of the multivariate system will bring the calculated values closer to the experimental values. Liquid–liquid equilibrium (LLE) data were determined for the system of n-butanol + n-pentanol + n-hexanol + water at 313.15, 323.15, and 333.15K under atmospheric pressure. LLE compositions were determined by gas chromatography. LLE data were correlated by the UNIQUAC model and the non-random two-liquid (NRTL) model. Both models were appropriate for describing the LLE of this quaternary equilibrium system. They provided accurate thermodynamic parameters for the phase equilibrium of C4–6 mixed alcohols in Fischer–Tropsch synthesis water.
研究领域:
化学工程
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热力学
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相平衡建模
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2019
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IF 4.561
Hui Guo,Yu Dong,Tiantian Ping,Xiaoqin Shi,Shufeng Shen
Densities and viscosities for the binary liquid mixtures of monoethanolamine (MEA) with 2-alkoxyethanols (2-ethoxyethanol (EGEE) and 2-butoxyethanol (EGBE)) were measured over the entire concentration range at temperatures of 293.15–353.15 K and atmospheric pressure. From the experimental results, the excess molar volume ( V E ), viscosity deviations (∆ η ) and excess Gibbs free energy of activation of viscous flow (∆ G ⁎E ) were calculated and the excess/deviations properties for the studied binary systems were fitted with the Redlich-Kister equation to estimate the binary interaction parameters. The results were analyzed in terms of intermolecular interactions between unlike molecules and intramolecular interactions within like associated molecules. The densities and viscosities of CO 2 -loaded solutions were also measured and correlated with the proposed correlations. The calculated values of density and viscosity for the binary/ternary systems are in good agreement with the experimental values, with AADs within 0.2% for density and 3.2% for viscosity. The FTIR spectral analysis for the binary mixtures of MEA with 2-alkoxyethanols at various concentrations suggests the presence of weak interactions between component molecules in the systems, and also supports the findings of excess properties.
研究领域:
物理化学
·
分子相互作用
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Jia Yang,Jiajia Hao,Chen Tang,Yaxin Guo,Mingxin Guo,Zhipeng Li,Shuzheng Liu,Hui Yu,Gang Qin,Qiang Chen
Although many hydrogels have been applied to wearable sensors, it is still challenging to simultaneously realize hydrogels with optical transparency, superior mechanical properties, excellent sensing performance, and anti-freezing by using inexpensive raw materials and an easy preparation process. Herein, using ethylene glycol/H 2 O (EG/ H 2 O) as a solvent, poly(vinyl alcohol)/EG organohydrogel (PVA/EG OHG) was prepared by a simple heating and frozen-thawing method. Owing to the multifunctionality of EG (i.e., physical cross-linker, anti-freezer and co-solvent), PVA/EG OHG demonstrated excellent integrated properties, including high strength, high toughness, and anti-freezing performances. Besides, PVA/EG OHG also showed low friction, self-cleaning, and frost resistance properties. After the introduction of LiCl, ionically conductive PVA/EG @LiCl organohydrogel was served as a self-cleaning strain sensor, which could be long-term stable to detect the motions of human under room and low temperatures. The study provides to further understanding of the organohydrogel, which will help us design next-generation high-performance organohydrogels.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）