JOURNAL OF CATALYSIS
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2022
·
IF 8.047
Wen Xu,Xiaoshu Wang,Weilong Hou,Kang Tang,Xinqing Lu,Yijing Gao,Rui Ma,Yanghe Fu,Weidong Zhu
Although the titanosilicate zeolite catalyzed one-pot oxidative hydration of ethylene with hydrogen peroxide (H 2 O 2 ) to ethylene glycol (EG) takes advantages of step-saving and facile operation, both H 2 O 2 utilization efficiency and EG yield are relatively low. In the present work, Sn-doped Ti-MWW zeolites, named Sn-Ti-MWW, were developed for this oxidative hydration, showing the much higher H 2 O 2 utilization efficiency and EG yield, compared to Ti-MWW. The extensive characterizations of Sn-Ti-MWW zeolites, in combination with Density Functional Theory (DFT) calculations, verify that the doping of Sn into Ti-MWW leads to the higher electropositivity of the Ti species, resulting in the stronger acidity of the zeolite, which is helpful to the H 2 O 2 utilization and EG production. In addition, although the catalyst deactivation is observed due to the deposition of the bulky byproducts onto the active sites and/or into the zeolite micropores, the simple calcination of the used catalyst readily restores its catalytic activity. Therefore, it is anticipated that the developed Sn-Ti-MWW catalyst might be applicable in the one-pot oxidative hydration of ethylene with H 2 O 2 to EG industrially.
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高影响因子
Polymers
·
2022
·Vol. 14
·期 10
·1997
·
IF 4.967
Tong Chen,Sanping Zhao
An effective strategy was developed to fabricate novel lanthanide ions–pyromellitic acid–methoxy poly(ethylene glycol) (Ln-PMA-MPEG) nano-assemblies. The amphiphilic partially esterified derivative (PMA-MPEG) of pyromellitic acid with methoxy poly(ethylene glycol) was designed and synthesized via the coupling reaction. Ln-PMA-MPEG nano-assemblies were rapidly fabricated using PMA-MPEG as a polymer ligand with Eu3+ions or mixed Eu3+/Tb3+ions through biomimetic mineralization in neutral aqueous systems. The size of the as-prepared materials could be designed in the range 80–200 nm with a uniform distribution. The materials were readily dispersed in various solvents and displayed visible color variations and different photoluminescent properties for solvent recognition. The mixed Eu/Tb-PMA-MPEG nanomaterials were investigated as ratiometric sensors for the detection of trace water in DMF and Fe3+ions in aqueous solutions. The sensor materials can quantitatively detect trace water in DMF from 0% to 10% (v/v). The resultant materials also display a strong correlation between the double luminescence intensity ratios (ITb/IEu) and Fe3+concentration, with a good linear detection concentration in the range of 0–0.24 mM and a limit of detection of 0.46 μM, and other metal ions did not interfere with the sensing mechanism for Fe3+ions. The novel nano-assemblies have potential applications as ratiometric fluorescent nanosensors in the chemical industry as well as in biomedical fields.Keywords:metal–organic frameworks;biomimetic mineralization;luminescent properties;fluorescent nanosensors
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PubMed
高影响因子
ENERGY
·
2022
·
IF 8.857
Yanchen Li,Beibei Wang,Weiye Zhang,Junqi Zhao,Xiaoyang Fang,Jingmeng Sun,Rongqi Xia,Hongwu Guo,Yi Liu
Wood is widely used in the field of building materials as a green and renewable natural porous material. With the continuous increase of global carbon dioxide emissions and increasingly serious environmental problems, improving the energy storage performance of wood is conducive to reduce carbon dioxide and regulate the temperature of the living environment. In this work, a composite phase change material is prepared by introducing stable polyethylene glycol-based energy storage polymer (PGMA) into the porous structure of delignified wood by high temperature immersion method. The wood structure has a greater influence on the crystallinity of PGMA and the modifier is widely distributed inside the lumen and also the cell wall, with crystallinity of 90% PGMA-Wood up to 8.97% and it exhibits good dimensional stability at high temperature. The thermal conductivity of 90% PGMA-Wood is increased to 0.32W/m·K, which reaches 190% higher than that of original wood for the lattice heat transfer replaces phonon heat transfer. The phase change temperature of 90% PGMA-Wood meets the comfortable indoor temperature for human with the melting enthalpy and solidification enthalpy are 25.12 J/g and 31.59 J/g, respectively. The simulated sunlight experiment shows that under the same lighting conditions, the indoor temperature of the house model made by 90% PGMA-Wood is 3 °C higher than that of the house made of original wood, which also has stronger thermal insulation performance at low temperature. All above indicates that PGMA-Wood have great potential applications in the field of solar-thermal energy conversion and storage as building insulation board and agricultural greenhouses.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 8
·2620-2631
·
IF 3.348
Yuandou Wang,Shuxin Wang,Wenju Hu,Feng Su,Fusheng Liu,Suming Li
Amphiphilic block copolymers were synthesized by ring-opening polymerization of ε-caprolactone (ε-CL) using 4-arm poly(ethylene glycol) (4aPEG) as macroinitiator. 4aPEG and 4aPEG-PCL copolymers were end functionalized by introducing acrylic groups, and characterized using NMR, GPC, FT-IR and DSC analyses. Photo-crosslinked hydrogels were prepared by irradiation of acrylated polymer solutions under visible light (405 nm), using lithium phenyl-2,4,6-trimethylbenzoy-lphosphinate (LAP) as a photoinitiator. In situ gelation was achieved by subcutaneous injection of LAP containing copolymer solution into the abdomen of mice, followed by exposure to visible light. The hydrogels exhibit highly porous structure, high swelling up to 3300%, and excellent biocompatibility. The swelling ratio decreases with increase of poly(ɛ-caprolactone) (PCL) block length and polymer concentration of hydrogels. Doxorubicin hydrochloride (DOX·HCl) was loaded in hydrogels by soaking dried gel in a DOX solution. The drug loading efficiency is dependent on the swelling performance, reaching a maximum of 94.3%. In vitro drug release studies showed a burst release for the first 6 h, followed by a slower release up to 82% at 28 days. The release rate decreased with increase of hydrophobic block length or polymer concentration of hydrogels. Higher anti-cancer activity on A549 lung cancer cells was obtained for hydrogels with higher drug concentration, and shorter PCL block length. Therefore, 4aPEG-PCL hydrogels with outstanding biocompatibility, in situ gelation and prolonged drug release could be very promising for long-term local cancer therapy.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Tian Lan,Jimin Xu,Chengjie Wang,Yiran Wang,Xiangyang Liu,Maogang He
The advantages of deep eutectic solvent (DES), such as non-toxic, non-flammable, low vapor pressure and low cost, make it a green solvent for capturing carbon dioxide. Adding water can change the nanostructures of DES and thus significantly influent the physical and chemical properties. At present, most researches focus on the theoretical study while few experimental studies on the effect of water on the thermal conductivity of DES. In this paper, the 3ω experimental system was improved using a two-wire structure to eliminate the end effect and measured the thermal conductivities of the DES composed of choline chloride and ethylene glycol and its aqueous solution to study the effect of water on the thermal conductivities. The uncertainty of thermal conductivity is less than 4%. The second-order Scheffé polynomial was modified to make it more suitable for fitting the thermal conductivities of the mixtures containing DES. The average absolute relative deviation calculated by the equation is 2.16%, which corroborates the high accuracy of the improved equation.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 31
·47159-47173
·
IF 5.19
Shen Xiaolin,Zhu Zhiliang,Zhang Hua,Di Guanglan,Qiu Yanling,Yin Daqiang
In this research, ethylene glycol-introduced solvothermal method was employed to fabricate a novel sphere-like CuBi 2 O 4 material to improve the adsorptive and photocatalytic performance of conventional CuBi 2 O 4 . A series of characterization has been applied to investigate properties of the obtained CuBi 2 O 4 (CBO-EG3). Compared with conventional rod-like CuBi 2 O 4 (CBO), the synthesized sphere-like CBO-EG3 exhibited rough surface, larger specific surface area, and more effective separation of photo-generated carriers, which overcome main shortcomings of CuBi 2 O 4 . The removal efficiency of typical antibiotic sulfamethazine (SMZ) reached almost 100% under the optimal experimental conditions. About 70% of SMZ could be adsorbed in 180-min dark reaction, with residual being photodegraded in 30 min. CBO-EG3 showed much higher photocatalytic efficiency than pure CBO, attributing to its highly effective photo-induced electron and hole separation. Meanwhile, substantial adsorption of pollutant on CBO-EG3 contributed vastly to removal of SMZ, photo-generated electrons and holes inclined to react with adsorbed SMZ directly, and photocatalytic process was mainly led by non-radical reaction. Elimination of SMZ in actual water samples and recycling experiment were also performed to evaluate CBO-EG3’s practical application potential. This study delivered a method to promote CuBi 2 O 4 ’s adsorptive and photocatalytic ability, which could expand the application of CuBi 2 O 4 in wastewater treatment.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Yiming Hu,Wenchang Li,Lin Li,Jinhong Wu,Shizhan Sheng,Huihua Wang
Developing impressive and low-cost electrocatalysts for hydrogen evolution reaction (HER) is the key for large-scale application of hydrogen production . Herein, a series of non-noble Ni-Mo-P coatings were achieved in the ChCl-EG electrolyte through a facile electrodeposition method under different experimental conditions. The 0.6Ni-0.21Mo-0.066 P coating fabricated at 30 mAcm −2 exhibits an impressive HER catalytic activity for delivering a current density of 10 mAcm −2 at only an overpotential of 57 mV in 1 M KOH electrolyte, ascribing to the synergistic effect of Ni, Mo and P elements and regulated electron structures, as well as large electrochemical active areas produced in the ChCl-EG electrolyte. Moreover, the 0.6Ni-0.21Mo-0.066 P coating demonstrates a pronounced electrocatalytic stability toward HER in the long-term test due to its obviously small inners tress. The outstanding HER performance of 0.6Ni-0.21Mo-0.066 P coating, along with facile and scalable fabrication method, highlights the potential application in the field of electrocatalytic water splitting.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Xinkuai He,Zhousi Hu,Ruqing Guo,Yiren Li,Luye Wu
One of the most critical challenges in the field of hydrogen production through water electrolysis technique is the design, development and manufacture of electrode materials with low-cost, highly electrocatalytic activity and stability. We employ the galvanostatic deposition technique to prepare the honeycomb structured Co−Ni−Mo alloy electrocatalysts from ethylene glycol (EG) system, in which the honeycomb structure presents highly intrinsic electrocatalytic activity for hydrogen evolution reaction (HER). The electrochemical behavior of Co 2+ , Ni 2+ and Mo 6+ reductions and the co-deposition behavior of Co-Ni, Co-Mo, Ni-Mo and Co-Ni-Mo alloys is reported. Benefiting from the composition engineering by alloying with Mo atoms, as well as the simultaneous existence of a suitable honeycomb structure, these Co 58 Ni 23 Mo 19 deposits obtained at an optimal parameter exhibit prominent electrocatalytic durability and activity with a η 10 of 51 mV for HER in a 1.0 M KOH. More importantly, the formation model of the honeycomb structured Co-Ni-Mo alloy deposits is proposed. This work suggests a simple and economical method for the preparation of a 3-dimensional catalytic electrode.
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高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 10
·期 14
·2497-2503
·
IF 6.331
Yuyue Zhang,Yuemin Wang,Qiangwei Xin,Mingjing Li,Peng Yu,Jun Luo,Xinyuan Xu,Xingyu Chen,Jianshu Li
Erythrocyte membrane nanosystems have become one of the important research directions of disease treatment, especially for tumor treatment, and can enhance the long circulation time of anti-cancer drugs in vivo, and penetrate and accumulate in the tumor site effectively. However, erythrocyte membranes lack targeting properties and it is necessary to provide tumor-targeting function by modifying erythrocyte membranes. In this study, we report on a novel modification method of an erythrocyte membrane nanosystem to target tumors. Specifically, the tumor-targeting molecule folate-poly (ethylene glycol) (FA-PEG) was modified with a zwitterionic 2-(methyl acryloyoxy) ethyl choline phosphate (MCP) by the Michael addition reaction to obtain MCP-modified FA-PEG (MCP-PEG-FA). Based on the strong “N–P” tetravalent electrostatic interaction between MCP and phosphatidyl choline on the erythrocyte membranes, MCP-PEG-FA can be modified on the erythrocyte membrane encapsulated doxorubicin (DOX) loaded poly(lactic-co-glycolic acid) (PLGA) nanosystem to form a tumor-targeting erythrocyte membrane nanosystem (FA-RBC@PLGA-DOX). The results show that MCP-PEG-FA was synthesized and successfully bonded to the erythrocyte membrane nanosystem, and the FA-RBC@PLGA-DOX nanosystem had a better tumor-targeting function and tumor killing effect compared with those of the nanosystems without FA ligand modification. The universal modification method of erythrocyte membranes is successfully provided and can be applied to the treatment of various diseases.
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PubMed
高影响因子
Frontiers in Materials
·
2021
·
IF 3.515
Lu Gang,Zhao Jikuan,Li Shaoqi,Chen Yuquan,Li Chunfang,Wang Youqi,Li Dongxiang
Partially hydrolyzed polyacrylamide (HPAM) was widely implemented to improve the rheological properties of displacing fluids, but the high temperature and salinity of the reservoir brine limited their applications. Herein, copolymers including HPAM, zwitterion-modified HPAM (z-HPAM), PEG-modified HPAM (p-HPAM), and zwitterion/PEG-modified HPAM (zp-HPAM) were prepared by free radical polymerization in an aqueous solution. The viscosity of these copolymers under different temperature and salinity was measured in aqueous solution. It is found that the viscosity of the HPAM under the harsh condition (90oC, 20 × 104 mg/L salinity) is only 9.6% of that value under the normal condition (25oC, pure water), while the z-HPAM can significantly improve salt resistance by the effects of salting-in effect and intermolecular electrostatic crosslinking, showing a viscosity retention of 22.9% under the harsh condition. The addition of PEG-containing monomer can strengthen hydrogen bonding between the polymer chains and form a sterically ordered structure with improved salinity and temperature resistance. The synergistic effect of zwitterion units and PEG units endows the zp-HPAM with good salinity and temperature resistance; thus, the sample viscosity under the harsh condition remains 170 mPa s, which retains 29% of the value under the normal condition. The enhanced rheology properties of the zp-HPAM under the harsh condition are significant for the enhanced oil recovery of water-soluble polymer flooding.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shixuan Li,Lijie Fu,Zhangfeng Dong,Lijie Que,Mengmeng Ma,Bihong Lv,Zuoming Zhou,Guohua Jing
The non-aqueous amine solvents for CO 2 capture gaine an advantage in energy-saving potential, but with a sharp increase viscosity after saturated absorption would easily cause problems such as equipment scaling and pipe blockage. In the present work, th e ethylene glycol (EG) was used as co-solvent and activator to regulate the non-aqueous absorbent of 1,5-diamino-2-methyl-pentane (DA2MP) and n-propanol (PrOH) for CO 2 capture. The absorption loading of the mixture solution was 1.13 mol·mol −1 when the mass concentration of DA2MP was 25 wt% and the volume ratio of PrOH to EG was 8:2. By activated by EG, the viscosity of the saturated solution was only 9.05 mPa·s, which changed from viscous precipitation to clarify liquid compared with that of DA2MP/PrOH. The absorbent maintained 90.30% of its initial CO 2 absorption loading after 10th cycle regeneration under 393.15 K for 60 min. According to the quantum chemical calculations and experimental results, the reaction and regulation mechanism of CO 2 capture into DA2MP/PrOH/EG was clarified. In DA2MP-PrOH solution, CO 2 firstly reacted with DA2MP to form carbamate, and them the product further reacted with PrOH to form alkyl carbonates, which was viscous and insoluble due to the high intermolecular force between the CO 2 products. After adding appropriate amount of EG, the solubility of insoluble products in solvent was increased through weakening the intermolecular interaction of products and enhancing the intermolecular interaction between products and solvents, which further converted them into soluble alkyl carbonate and realized viscosity reduction. The regeneration heat duty of DA2MP/PrOH/EG solution was estimated as 1.58 GJ·ton −1 CO 2 , which was 29.5% and 58.42% less than that of DA2MP/PrOH and bench mark MEA solution, respectively, indicating a alternative candidate for CO 2 capture.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 47
·e54693
·
IF 3
Chaoyi Cai,Zhifan Chen,Shufen Ye,Rong Zhang,Xiaodi Pan,Rong Yang,Jinchun Li
This work synthesized a series of biodegradable thermoplastic elastomer PBSFG via an esterification polycondensation reaction. The influence of the soft segment PEG molecular weight and component on the thermal behavior, mechanical property, and degradation performance of PBSFG were investigated. The results showed that the PEG component plays a major part in the properties of PBSFG. Upon reaching a PEG component concentration of 40% within PBSFG, the yielding phenomenon becomes imperceptible on the stress–strain curves, signifying the onset of a plastic-to-elastomer transition. In the case of PBSFG40-6k, a remarkable tensile strength of 23.5 MPa and an elongation at break measuring 576% were achieved, thereby displaying tensile properties on par with those of PBAT. Thanks to the unsaturated structure, the mechanical properties of PBSFG can be enhanced by UV irradiation. Finally, Candida cylindracea lipase catalytic degradation experiments showed that PBSFG is a biodegradable polyester, which is beneficial in reducing environmental plastic pollution.
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高影响因子
危险品化学品经营许可证（带存储）