CHEMISTRY-A EUROPEAN JOURNAL
·
2024
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IF 3.9
Dongping Fan,Jinyu Zheng,Xin Xiang,Dongdong Xu
Graphical The hybrid of PdCuAg and CeO 2 nanowires with structural (abundant heterojunction/interfaces and ultrathin nanowire structure) and compositional advantages were facile prepared by one-pot method, thus embracing enhanced electrocatalytic performance for ethylene glycol oxidation reaction. Introducing CeO 2 into Pd-based nanocatalysts for electrocatalytic reactions is a good way to solve the intermediate toxicity problem and improve the catalytic performance. Here we reported a simple strategy to synthesize the PdCuAg and CeO 2 nanowires hybrid via a one-pot synthesis process under strong nanoconfined effect of specific surfactant as templates. Owing to the structural (ultrathin nanowires, abundant heterojunction/interfaces between metal and metal oxide) and compositional (Pd, Cu, Ag, CeO 2 ) advantages, the hybrid showed significantly enhanced catalytic activity (6.06 A mg Pd −1 ) and stability, accelerated reaction rate, and reduced activation energy toward electrocatalytic ethylene glycol oxidation reaction.
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RSC Advances
·
2018
·Vol. 8
·期 13
·7179-7185
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IF 2.936
Ruiyun Li,Heyuan Song,Guoqin Wang,Jing Chen
Ketalization of cyclohexanone with glycol has been carried out using molecular sieve SBA-15 immobilized Brønsted acidic ionic liquid catalyst. The properties of the heterogeneous catalysts were characterized by elemental analysis, Fourier transform infrared (FT-IR) spectra, scanning electron microscopy (SEM), thermogravimetry/differential scanning calorimetry (TG/DSC), and N2 adsorption–desorption (BET). The results suggested that Brønsted acidic ionic liquid [BSmim][HSO4] had been successfully immobilized on the surface of SBA-15 and the catalytic performance evaluation demonstrated that the catalyst BAIL@SBA-15 exhibited excellent catalytic activities in the ketalization of cyclohexanone with glycol. In addition, the effects of reaction temperature, catalyst loading, reaction time, and reactant molar ratio have also been investigated in detail, and a general reaction mechanism for the ketalization of cyclohexanone with glycol was given. The SBA-15 immobilized ionic liquid can be recovered easily and after reusing for 5 times in the ketalization reaction, the catalyst could still give satisfactory catalytic activity.
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Journal of Materials Research and Technology-JMR&T
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2024
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IF 6.2
Yonglian Qiao,Lingxu Yang,Erwei Xie,Mengqi Luo,Le Wang,Chaoliu Zeng,Huijun Liu
Titanium alloy chemical milling wastewater contains a significant amount of ethylene glycol monobutyl ether (EGBE), which is toxic and difficult to be degraded by microorganisms, and the emission will lead to severe environmental pollution. To solve this problem, the electrocatalytic oxidation method was employed to remove EGBE in the wastewater, in which a porous Ti 4 O 7 /Ti electrode were prepared and employed as the anode, while stainless steel acted as the cathode. The effects of current density, interelectrode distance, and stirring mode on the COD removal rate were also investigated. Results show that the COD of the wastewater significantly decreases from 12410 to 15 mg L −1 after 16 h of electrolysis at 10 mA cm −2 and electrode spacing of 1.0 cm as well as aeration stirring at 100 mL min −1 . Moreover, pilot-plant scale testing reveals that the COD decreasing from 11980 to 183 mg L −1 after 24 h of electrolysis. Consequently, the utilization of porous Ti 4 O 7 /Ti electrode as anode in the electrocatalytic oxidation method presents significant potential in removal of EGBE in aviation industry wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shuaimei Li,Wenlei Zhang,Congwei Wang,Gang Li
Ethylene glycol (EG) is extensively utilized as anti-freezer and deicer, which would bring potential health risk under unintentional exposures especially with hazardous inhalation of EG aerosols or vapors. In this study, ZnIn 2 S 4 (ZIS)/WO 3 core-shell nanofibrous heterostructure loaded with optimized Au nanoparticles (NPs) was prepared for superiorly sensitive and selective EG gas sensing. The ternary Au/ZIS/WO 3 heterostructures exhibited an excellent response ( Ra/Rg =98.92) to 50 ppm EG, demonstrating an enhancement of 3.5 times compared to the binary ZIS/WO 3 , and a substantial improvement of 59.5 and 24.1 times compared to pure WO 3 and ZIS, respectively. The ternary Au/ZIS/WO 3 heterostructures also possessed an extremely low detection limit of 6 ppb, as well as excellent selectivity , repeatability, and long-term stability. This exceptional gas sensing performance can be attributed to its distinctive ternary Au/ZIS/WO 3 heterostructures with high specific surface areas . This unique structure not only facilitate the activation of abundant active oxygen species, but also promote the spillover effect of Au and enhance effective electronic distribution, thereby providing more EG adsorption sites, which was confirmed by density functional theory calculation. The synergistic effect arising from the metal-semiconductor interface and the core-shell heterostructure presents a novel avenue for advancing high-performance sensor technologies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Lin Huang,Maoqing Chen,Ying Yang,Qingshou Zheng,Li Gu,Ruobing Cheng,Xuebo Cao
Electro-reforming of organics such as alcohols into commodity chemicals and H 2 powered by renewables is intriguing and prevailing with the remarkable renaissance of electrochemical technology. Integrating Pt/Pd with an auxiliary metal, metal oxide, and metal hydroxide are feasible strategies to design the desirable catalysts toward alcohols electro-oxidation reactions. These catalysts however have high affinity toward carbonyl intermediates that occupy and poison the active sites. Thus, the target products suffer from poor selectivity. To address these issues, a facile binary Pt–Ag alloy nanowires (NWs) catalytic system was reported for efficient electro-oxidative reforming of ethylene glycol (EG), yielding glycolate with a selectivity of 91.5 %, an EG conversion of 96.4 %, and Faradaic efficiency (FE) of 87.4 %. Experimental and theoretical investigations revealed that Ag-induced electronic structure perturbations in Pt 0.66 Ag catalyst boosted the kinetics and robustness as a conventional promoter toward EG electro-oxidation reaction (EGOR). Moreover, the one-electron oxidation of water/hydroxide ion to generate abundant hydroxyl adspecies (OH ad ) on Ag served as another crucial promoter for efficient dehydrogenation, glycolate formation, and carbonyl intermediates release via a highly efficient, noncompetitive Langmuir–Hinshelwood (L–H) mechanism, but not the competitive L–H mechanism or the Eley–Rideal (E–R) mechanism. These findings provide new insights into the selective alcohol electro-oxidation reaction, and facilitate the generation of commodity chemicals via partial electro-oxidation reactions.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2012
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IF 3.456
Qin Tu,Jian-Chun Wang,Rui Liu,Yanrong Zhang,Juan Xu,Jianjun Liu,Mao-Sen Yuan,Wenming Liu,Jinyi Wang
A new antifouling polyester monomethoxy-poly(ethylene glycol)-b-poly( l -lactide)-b-poly(sulfobetaine methacrylate) (MPEG-PLA-PSBMA) was obtained by ring-opening polymerization of l -lactide, and subsequent click chemistry to graft the azide end-functionalized poly(sulfobetaine methacrylate) (polySBMA) moieties onto the alkyne end-functionalized MPEG-PLA (MPEG-PLA-alkyne). The chemical structure of the polymer was characterized using 1 H nuclear magnetic resonance and Fourier-transform infrared spectroscopy, and its physical properties (including molecular weight, glass transition temperature, and melting point) were determined using gel permeation chromatography and differential scanning calorimetry. To investigate its hydrophilicity and stability, as well as its antifouling properties, the polymer was also prepared as a surface coating on glass substrates. The wettability and stability of this polyester was examined by contact angle measurements. Furthermore, its antifouling properties were investigated via protein adsorption, cell adhesion studies, and bacterial attachment assays. The results suggest that the prepared zwitterionic polyester exhibits durable wettability and stability, as well as significant antifouling properties. The new zwitterionic polyester MPEG-PLA-PSBMA could be developed as a promising antifouling material with extensive biomedical applications.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2012
·
IF 3.456
Nan Nie,Qin Tu,Jian-Chun Wang,Fan Chao,Rui Liu,Yanrong Zhang,Wenming Liu,Jinyi Wang
Thrombus formation and microbial invasion are two major complications that impede the widespread application of blood-contacting devices. The development of new materials that have blood compatibility and antibacterial adhesion activity has gained increased attention. In this study, a new class of polymers composed of hydrophilic dendronized polyethylene glycol (PEG) methacrylate and hydrophobic octyne monomethyl ether-glycidyl methacrylate was synthesized via click chemistry and free radical polymerization. Different polymers were synthesized by changing the ratio of the two monomers. The structures of the synthesized polymers were characterized by 1 H nuclear magnetic resonance and Fourier-transform infrared spectroscopy. Their physical properties such as molecular weight, polydispersity, and glass transition temperature were determined using gel permeation chromatography and differential scanning calorimetry. The synthesized polymers were coated on glass slides to prepare a series of polymeric surfaces. Contact angle measurements and attenuated total reflection Fourier-transform infrared spectroscopy analysis showed that the polymeric surfaces had long-lasting stability. The introduction of the monomer dendronized PEG methacrylate to the polymers greatly improved the hydrophilicity of the polymeric surfaces. The blood compatibility of the synthesized polymers was evaluated by protein (bovine serum albumin and fibrinogen) adsorption and platelet adhesion assays. Their antibacterial adhesion ability was investigated using the Gram-negative Pseudomonas aeruginosa and the Gram-positive Staphylococcus aureus . The results demonstrated that the amount of adsorbed protein, platelets, and bacteria on the polymeric surfaces decreased with increased content of the hydrophilic monomer dendronized PEG methacrylate in the polymers. However, no obvious difference was observed when such content exceeded 50 mol%. The results suggested that the new kind of polymer could be developed as a promising blood-contact coating material that may have extensive medical applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2010
·Vol. 118
·期 2
·943-949
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IF 1.203
Yanlin Wei,Xiaoli Wang,Junping Gao,Yashao Chen
Ar plasma-induced graft polymerization of poly(ethylene glycol) (PEG) on Ar plasma pretreated poly(methyl methacrylate) (PMMA) surfaces was carried out to improve the antistatic properties. The surface composition and microstructure of the PEG-grafted PMMA surfaces from plasma induction were characterized by attenuated total reflectance Fourier transfer infrared (ATR-FTIR) spectroscopy, water contact angles (CA), and atomic force microscopy (AFM) measurements. The measurements revealed that the antistatic properties can be remarkably improved with the surface resistivity of PEG-grafted PMMA surface decreasing significantly by 3–6 orders of magnitude, with the optimum condition for polymerization grafted onto the Ar plasma pretreated PMMA surface being 40 W for RF power and 3 min for glow discharge time. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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MOLECULES
·
2024
·Vol. 29
·期 23
·5770
·
IF 4.2
Lili Fu,Kun Liu,Jinyu Yang,Yuan Zhao,Zhijun Wang,Dongxu Tang,Yuesheng Li,Huangqin Chen
In this study, a polyvinyl alcohol/polyethylene glycol/hydroxypropyltrimethyl ammonium chloride chitosan (PVA/PEG/HACC) ternary composite hydrogel was synthesized using electron-beam radiation. The materials were thoroughly characterized via Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, Brunauer–Emmett–Teller analysis, gelation fraction tests, and swelling rate tests. Systematic adsorption experiments revealed that the rate of adsorption of calf thymus DNA (ctDNA) by the PVA/PEG/HACC hydrogel reached 89%. The adsorption process followed the Langmuir isotherm and pseudo-second-order kinetic model. This process was mainly characterized by monolayer chemical adsorption, with intraparticle diffusion playing a crucial role. In addition, the process was spontaneous, with higher temperatures enhancing adsorption. The possible adsorption mechanisms included electrostatic interactions, hydrogen bonding, and van der Waals forces. The maximum ctDNA desorption rate was 81.67%. The adsorption rate remained at 71.39% after five adsorption–desorption cycles. The bioactivity of the PVA/PEG/HACC hydrogel was validated by antibacterial, cytotoxicity, and apoptosis tests. The results of this study demonstrated the crucial application potential of adsorbent materials in DNA adsorption and biomedical applications.
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DESALINATION
·
2024
·
IF 8.3
Yichi Liu,Yi Liu,Wenjing Chen,Xiaowu Hu,Yinshui He,Yan Ma,Yuqiong Xie,Wenxing Luo,Lixiang Luo,Lan Jiang,Xiongxin Jiang,Qinglin Li
CdS has been shown to be an excellent photon trap with strong absorption of light at visible and near-infrared wavelengths. The use of CdS for phase change material (PCM) modification can significantly improve its photothermal conversion performance. However, due to the unique energy band structure of CdS, the difficulty in electron conduction leads to poor thermal conductivity . This problem can be improved by introducing high thermal conductivity nanometals for modification, however, the effective combination of CdS and nanometals has been challenging. In this study, a new preparation strategy is demonstrated, in which Ag nanoparticles (NPs) with similar lattice parameters and crystalline coordination to CdS is first introduced on the surface of carbonized melamine foam (CMF), followed by the introduction of CdS NPs. This similar structure helps to form a better interfacial bond between CdS and Ag. The resulting stabilized structure enables the composite phase change material (CPCM) to achieve 96.1 % PEG loading with an ultra-high photothermal conversion efficiency of 94.6 %, thermal conductivity of 0.61 W/m∙K, and excellent antimicrobial activity. This study provides valuable guidance for the engineering design of CPCM with high photothermal conversion performance and suggests its practical application value in seawater evaporation and thermal management of medical devices .
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Materials Horizons
·
2024
·
IF 12.2
Haoran Tang,Yuanying Liang,Chi-Yuan Yang,Xi Luo,Jiangkai Yu,Kai Zhang,Simone Fabiano,Fei Huang
High-performance n-type organic mixed ionic-electronic conductors (OMIECs) are essential for advancing complementary circuits based on organic electrochemical transistors (OECTs). Despite significant progress, current n-type OMIECs often exhibit lower transconductance and slower response times compared to their p-type counterparts, limiting the development of OECT-based complementary circuits. Optimizing the conjugated backbone and side chain structures of OMIECs is critical for enhancing both ion and electron transport efficiencies while maintaining a delicate balance between the two. In this study, hydrophilic polyethylene glycol (PEG) side chains were incorporated into the highly conductive n-type polymer poly(3,7-dihydrobenzo[1,2-b:4,5-b′]difuran-2,6-dione) (PBFDO) backbone to achieve this goal. The incorporation of PEG chains improved ion accessibility, and by adjusting the PEG content, the electronic and ionic transport properties were fine-tuned, ultimately enhancing the performance of OECTs and related p–n complementary circuits. The n-type OECTs based on PBFDO-PEG50wt% demonstrated exceptional transfer characteristics, including a transient response time (τON) as low as 72 μs, a high geometry-normalized transconductance exceeding 400 S cm−1, and an impressive μC* value surpassing 720 F cm−1 V−1 s−1. Notably, the use of PBFDO-PEG50wt% in a complementary inverter resulted in a voltage gain of 20 V/V, more than five times higher than that achieved with unmodified PBFDO (<4 V/V). These findings highlight the importance of balancing electron and ion transport characteristics in OMIECs to achieve high performance in OECTs and their associated circuits, and they validate PEG decoration as an effective approach.
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CHROMATOGRAPHIA
·
2024
·
IF 1.2
Xiang Yuqian,Huang Yu,Yan Xiaohui,Zhu Zhipeng,Wu Dapeng,Gao Peng,Li Jiulong
In this work, in order to investigate retention and selectivity mechanism on hydrophilic interaction liquid chromatography (HILIC), one of the most common hydrophilic stationary phases, polyethylene glycols (PEG) of different molecular weights (200, 400, 800 and 2000 Dalton) were covalently bonded to porous silica spheres via isocyanate silane. The PEG stationary phase was then characterized in detail by infrared spectroscopy, scanning electron microscope, nitrogen adsorption–desorption isotherms, and thermogravimetric analysis, and the PEG bonding density was determined as 2.7, 2.3, 1.4, 0.26 μmol m −2 , respectively. The HILIC retention mechanism was systematically conducted by quantitative evaluation of the effect of partitioning and adsorption, hydrogen bonding and hydrophilicity, and temperature on the retention of nucleosides and nucleobases. It was found that the retention was highly relevant on the partitioning, hydrogen bonding between solutes and PEG, and strong electrostatic interactions (attractive/repulsive) between solutes and silica. To further assess the separation performance, three kinds of polar compounds (nucleosides and nucleobases, organic acids and β-blockers) were chosen as probe compounds. Among the four PEG stationary phases, it was found that the higher PEG ligand density generally resulted into more superior separation performance to these polar compounds, that is, PEG200-bonded stationary phase with highest ligand density of 2.7 μmol m −2 generated better resolution. Furthermore, higher ligand bonding mass would increase the retention of nucleosides, nucleobases and organic acids except β-blockers. Generally, the HILIC stationary phase with continuous and dense hydrophilic layer is beneficial to the separation of polar analytes. Graphical Abstract
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