APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Changhui Liang,Hongjun Fan,Aiqun Kong,Mao Peng,Menghui Liu,Weizhuo Xu,Jian Song,Yongxin Li,Jinli Zhang,Yunjie Ding,Z. Conrad Zhang
The hydrogen evolution reaction (HER) activity of Pt-based electrocatalysts in alkaline solution is typically limited by the rate of water dissociation. Herein, we report a facile one-step strategy in the synthesis of Pt/Ni(OH) 2 heterojunction for enhanced HER activity. Ultrathin Ni(OH) 2 nanosheets decorated with uniformly dispersed Pt nanoparticles at average sizes of 2.2 nm are in-situ grown on nickel foam (NF) with binder-free feature under mild conditions due to induction by ethylene glycol diethyl ether, even without adding extra Ni 2+ sources. The synthesized Pt/Ni(OH) 2 /NF shows superior HER activity in 1.0 M KOH solution, achieving low overpotentials of 42, 91, and 114 mV at current densities of 10, 100, and 200 mA cm −2 and outstanding durability for 25 h at 25 mA cm −2 without noticeable Pt agglomeration. This work offers a mechanistic insight into one-step fabrication of Pt/Ni(OH) 2 -based catalyst with high activity and stability for HER.
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Materials Research Express
·
2023
·Vol. 10
·期 11
·115404
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IF 2.3
Zhuoran Li,Huikang Yang,Fan Xu,Xuwen Zeng,Haowei Huang,Xinqing Jiang
Vitamin E Poly(ethylene glycol) monoplatinum ester (TPGS) nanoparticles have attracted much attention in recent years for overcome multidrug resistance. Herein, a well-defined folic acid (FA)-conjugated and disulfide bond-linked polymer (FA-SS-TPGS) was synthesized. These polymer nanoparticles were utilized as theranostic agents for tumor-targeted magnetic resonance imaging (MRI) and chemotherapy. By loading doxorubicin (DOX) and superparamagnetic iron oxide (SPIO) particles into TPGS nanoparticles, FA-SS-TPGS@DOX/SPIO nanoparticles are obtained. In vitro drug release studies revealed that under a reducing environment in the presence of glutathione (GSH), approximately 100% of the doxorubicin (DOX) was released from the disulfide bond-linked theranostic nanoparticles within 24 h. DOX and SPIO were efficiently delivered into HepG2-ADM cells due to the folate receptor-mediated endocytosis process of the nanoparticles. Additionally, the presence of glutathione (GSH) triggered the cleaving of the disulfide bonds, further facilitating the delivery of DOX and SPIO into the cells. Furthermore, the FA-SS-TPGS @DOX-SPIO nanoparticles exhibited strong MRI contrast enhancement properties. In conclusion, FA-SS-TPGS@DOX/SPIO are potential nanoparticles for tumor-targeted MRI and chemotherapy, which can also overcome multidrug resistance.
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Journal of Cleaner Production
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2021
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IF 9.297
Ying Huang,Diyun Chen,Shuqi Chen,Minhua Su,Yongheng Chen,Yixiong pang,Gutha Yuvaraja
Environmental thallium (Tl) and uranium (U) pollution have attracted great research attention. This study developed a stepwise extraction process to separate Tl and U in an aqueous two-phase system (ATPS) based on 15% polyethylene glycol (PEG6,000) and 10% ammonium sulfate with hydrochloric acid and chlorophosphonazo III (CPA III). The effects of PEG molecular weight , temperature, hydrogen peroxide, HCl, pH, CPA III, equilibrium time, ionic strength , and dissolved organic matter (DOM) on Tl and U separation were studied systematically. The results revealed that 10% H 2 O 2 and 3.2 M HCl in the ATPS rapidly yielded a Tl extraction rate of 95.2%, and the separation factor of Tl and U exceeded 2000 in 5 min; 97.8% of U was extracted in an ATPS containing 0.1 mM CPA III at pH 5–6, and the separation factor of U and Tl reached 5000 in 10 min. The increase of Na + and NH 4 + from 0 to 60 mM did not affect U extraction but promoted Tl extraction and separation, whereas K + inhibited Tl and U extraction. Moreover, although DOM inhibited Tl extraction, it promoted U extraction and separation. Mechanism analysis indicated that Tl and U extraction in the ATPS was due to the salting-out effect of different anions and complexing agents in different acidities. Relative to the conventional method of organic solvent extraction for Tl and U, the method developed herein has greater safety, lower cost, and more environmental benefits, which can be function appropriately in seriously contaminated wastewater containing Tl and U.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Guang Yang,Jianqiang Zhang,Suhua Yu,Chunjuan Huang,Xin Song,Renjie Xu
Water as an auxiliary solvent is added to various alcohol solvents (methanol, ethanol, ethylene glycol (EG)) and N,N-dimethylformamide (DMF) to form a variety of liquid mixtures, which are divided into different types according to different proportions. Starting from pure water, 0.1 mass fraction of organic solvents is added at a time, until the ratio of organic solvent is 1. The above-mentioned liquid mixtures are used as solvents to dissolve rimsulfuron at 278.15–323.15 K under 101.1 kPa by means of the isothermal static technique. Considering that there are many factors that change the experimental results, this experiment mainly selected temperature and water content, two factors, as the main independent variables. From the point of view of temperature, it changes from a low value to a high value, so it is obvious that the solute mole fraction also follows its footsteps. Unlike the temperature, as the organic solvent is continuously diluted by water, the solute solubility changes in the opposite direction to the water content. By controlling the variable method to ensure that the above two variables remain unchanged, DMF has the best dispersion ability for all of the selected solvents to dissolve rimsulfuron. The dissolution strength of the selected solvents at 323.15 K obeyed the following ascending sequence: EG (3.192 × 10–5) < ethanol (8.497 × 10–5) < methanol (9.849 × 10–5) < DMF (2.622 × 10–4). We employed Jouyban–Acree, van’t Hoff–Jouyban–Acree, and a combination of the Apelblat–Jouyban–Acree model to calculate solubility values of rimsulfuron. Results of relative average deviation (RAD) and root-mean-square deviation (RMSD) from the van’t Hoff–Jouyban–Acree model were 2.11% and 1.50 × 10–6, respectively. For drugs with poor water solubility and dissolution rate, measuring their solubility and understanding their dissolution properties can effectively help solve the problem of nonwetting and nondiffusion.
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Mingxin Lv,Yanwei Zhang,Qianghua Xin,Defu Yin,Shitao Yu,Shiwei Liu,Lu Li,Congxia Xie,Qiong Wu,Hailong Yu,Yue Liu
In this work, a series of Pd@Al-MSiO 2 yolk–shell-structured nanospheres (YSNSs) with different Al contents were synthesized by a facile one-pot method. The EDX elemental analysis and high-magnification TEM image of Pd@Al-MSiO 2 YSNSs confirmed that its well-defined yolk-shell structure with a moving Pd core and mesoporous silica shell rich in Al species. Furthermore, Solid state NMR and Py-FTIR results confirmed that Al species grafting mainly formed 4-coordinated Al (AlO 4 ) in the mesoporous silica framework which led to generating abundant Lewis acid sites. The influence of Al species on the physicochemical properties of Pd@Al-MSiO 2 YSNSs, as well as their catalytic performance for the hydrogenolysis of glucose to 1,2-propylene glycol (1,2-PG), was investigated. The mesoporous silica shell with abundant Lewis acid sites is a significant contributor to the isomerization of glucose into fructose, while the Pd core plays a role in promoting the hydrogenation of intermediates. The unique hollow space inside the Pd@Al-MSiO 2 YSNSs provides a location for the retro -aldol condensation of fructose and consequently avoids direct hydrogenation of fructose. The as-synthesized Pd@Al 3 -MSiO 2 YSNSs shows superior catalytic activity (1,2-PG selectivity of 47.4%, glucose conversion of 95.4%) in the hydrogenolysis of glucose, and far outperforms the Pd/Al 3 -MSiO 2 catalysts. In addition, owing to the influence of the 4-coordinated Al species on the geometry and chemical properties of the mesoporous silica shell, the nanospheres show good stability and reusability over multiple catalytic cycles without significant loss of activity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Wenlong Zhang,Jincheng Mao,Xiaojiang Yang,Yang Zhang,Heng Zhang,Jizhen Tian,Chong Lin,Jinhua Mao,Jinzhou Zhao
In this study, a cationic viscoelastic surfactant (VES) called N -erucamidopropyl- N , N -dimethyl- N -(1, 2)-propylene glycol ammonium chloride (EDPG) with an unsaturated erucyl amide (C 25 ) tail and a propylene glycol group was developed, which has an ultra-high salt tolerance compared to that of UC 22 AMPM. As with the zwitterionic VES of EDAS, EDPG molecules can aggregate into wormlike micelles (WLMs) in high-salinity solutions (above 10 wt% NaCl concentration) to impart viscoelasticity to the solutions, and their production cost is comparatively low. The surface tensions of EDPG and EDAS were measured in deionized water and salinity solutions to study the surface activities and the packing parameters ( P ) as functions of salinity, and the results showed completely different mechanisms regarding the salt tolerances of EDPG and EDAS. The propylene glycol group imparts a larger initial equilibrium area per molecule on the aggregate surface ( a 0 ) of EDPG, which can keep the P between 1/3 and 1/2 under ultra-high-salinity conditions to ensure the presence of WLMs. However, the salt tolerance of EDAS is attributed to its insensitivity to salinity because it is a zwitterionic betaine VES. The aggregation behavior of EPDG, EDAS, and UC 22 AMPM and the viscoelastic properties and microstructures of the EDPG solutions as functions of salinity were investigated using DLS, NMR, cryo-SEM, and oscillatory measurements to further confirm the salt tolerance of EDPG. Additionally, brine-based clean fracturing fluids prepared using EDPG and simulated brines exhibited good performance that meets the requirements of hydraulic fracturing fluid, according to a series of laboratory evaluation.
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ACS Applied Materials & Interfaces
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2019
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IF 8.456
Bobo Fan,Qi Fan,Min Cui,Tingting Wu,Jinshen Wang,Hongmin Ma,Qin Wei
The serum level of soluble CD44 is directly associated with several clinicopathological parameters of malignant diseases. There is a great need for the development of an easy and cost-effective detection method for soluble CD44 for both the diagnosis and the treatment of cancers. In this work, a simple photoelectrochemical (PEC) method for the sensitive detection of serum-soluble CD44 is proposed based on the construction of a hybrid antifouling coating on the TiO2 substrate. Hyaluronic acid (HA) and poly(ethylene glycol) (PEG) are co-immobilized using a biomimetic one-step surface functionalization approach. The immobilized HA shows strong recognition abilities toward soluble CD44, and the synergistic antifouling effect achieved by the combination of PEG and HA improves the sensing specificity. Based on the inhibitory effect of CD44 recognition on the PEC signal of the TiO2 substrate, a PEC biosensor is developed with a wide response range and a low detection limit. The development of antibody-free biosensors may promote the application of soluble CD44 as a biomarker for the diagnosis and treatment of malignant diseases.
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PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2019
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IF 3.858
Xue Xiong,Meiling Qi
This work presents the investigation of utilizing adenine-functionalized polypropylene glycol (APPG) for capillary gas chromatographic separations. The statically coated APPG column (0.25 mm i.d.) showed moderate polarity and high column efficiencies of 4660 plates/m and 4376 plates/m determined by n -octanol and naphthalene, respectively. Remarkably, the APPG column baseline resolved all the components of the Grob test mixture and displayed good peak shapes for some stringent analytes that are prone to peak tailing or severe adsorption. Also, it achieved complete separation of dimethylaniline isomers, which are difficult to be resolved due to their high resemblance in structures and properties. The above results demonstrate the high selectivity and inertness of the APPG column and its distinct advantages over the polypropylene glycol (PPG) column and commercial polyethylene glycol (PEG) column. In addition, its separation performance has good repeatability with the RSD values on retention times below 0.05% for run-to-run, 0.11–0.12% for day-to-day and 1.7–1.9% for column-to-column, respectively. Further, the APPG column was applied to determination of isomer impurities in commercial dimethylaniline products and to determination of the additives of anilines and phenols in a hair-dye product, proving its great potential for practical GC analysis.
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ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Dequan Chi,Fei Liu,Haining Na,Jing Chen,Chuncheng Hao,Jin Zhu
With a high melting temperature and good crystallization ability, poly(neopentyl glycol 2,5-furandicarboxylate) (PNF), a polyester derived from bio-based 2,5-furandicarboxylic acid and neopentyl glycol, has been proposed and proved to be a promising hard segment for the development of novel bio-based thermoplastic poly(ether-ester) elastomer (TPEE). The resulting TPEE, namely PNF–PTMG, has high performance comparable to the petroleum-based counterpart PBT–PTMG (i.e., Hytrel, Dupont). Among all of the existing polyesters derived from bio-based 2,5-furandicarboxylic acid (FDCA), PNF has perfectly balanced properties, namely, a high melting temperature of 200 °C and a good crystallization ability to easily grow medium to large-size crystalline spherulites. Characterizations based on dynamic mechanical analysis and small-angle X-ray scattering suggest that there are two domains in PNF–PTMG, the crystalline PNF and a mixture of amorphous PNF and PTMG. These two domains form microphase separation induced mainly by the crystallization of PNF. By adjusting the PTMG soft segment from 30 to 60 wt%, PNF–PTMG shows a melting temperature, tensile modulus (E), and elongation at the break (εb) ranging from 180 to 134 °C, 738 to 56 MPa, and 38 to 1089%, respectively. More importantly, the shape recovery ratios increase from 57 to 90% at 200% strain when the amount of PTMG increases from 50 to 70 wt%, indicating excellent elastic property. These results indicate that PNF is an excellent hard segment to serve as a strong physical cross-link so that PNF–PTMG is able to display high performance comparable to extensively commercialized PBT–PTMG.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
·
IF 3.973
Jun Zhao,Chun-Liu Yu,Wei Fang,Ji-Duan Lin,Guo Chen,Xiao-Qin Wang
Self-assembled polypseudorotaxanes (PPRXs) fabricated with α -cyclodextrin and poly(ethylene glycol) (PEG) or its thiolated derivatives were candidate functional materials for enzyme soft-immobilization, encapsulation and controlled-release. The study of their interaction with Jack bean urease (JBU) indicated that they inconspicuously influenced the activity and stability of JBU during long storage, up to 30 days. The macro-species were inaccessible to JBU’s active site and the steric effect might play a significant role in the stabilization of JBU, when compared with the small-molecular sulfhydryl inhibitor thioglycolic acid. Circular dichroism and fluorescence spectra analyses revealed that thiolated PEG 400 -(SH) 2 and its assembly PPRX 400 (SH) brought in perturbations to certain α -helical or β -sheet domains of JBU, making JBU’s conformation more flexible. The resulting partial unfolding of domains exposed several hydrophobic clusters and varied JBU’s surface hydrophobicity. It also rendered the chromophores more hydrophilic and more bared to the polar environment, leading to the typical bathochromic-shift and quenching in intrinsic and synchronous fluorescence spectra. Moreover, the surface hydrophobicity profile of JBU was depicted by fluorescent probe monitoring and the unique “hydrophobic cave” motif was proposed by analyzing JBU’s structural data from the Protein Data Bank. It should be pointed out that conformational variations mainly occurred at the surface region of JBU, while the buried active bi-nickel center was not markedly influenced by the macro-species. The results demonstrated that the PPRXs might act as a proper carrier for JBU encapsulation or soft-immobilization.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Linqiong Xu,Shaoping Qian,Wenge Zheng,Yongkang Bai,Yongqing Zhao
The cellulose acetate/poly(ethylene glycol) (CA/PEG) blend with a weight ratio of 50/50 was solution-blended followed by supercritical carbon dioxide foaming and the PEG leaching process. Interestingly, a bimodal open-celled structure (BMOCS) with networks is obtained. Large cells are developed from the cell nuclei formed during rapid depressurization, while small cells are formed by leaching of PEG out from the blend foams. The open-celled structure with networks is developed by the synergistic effect of leaching of PEG and rupture of some cell wall. The influences of foaming temperature and pressure on cellular structure for CA and CA/PEG blend foams were studied. The foam densities of blend foams after leaching PEG (0.18–0.41 g/cm3) are higher than those of CA foams (0.13–0.20 g/cm3). The leaching contents of PEG out from CA/PEG blend foams are in the range of 89.0%–99.1%.
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THERMOCHIMICA ACTA
·
2013
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IF 1.989
Wenli Zhang,Yutao Hu,Yun Wang,Juan Han,Liang Ni,Yingchun Wu
Liquid–liquid equilibrium data of aqueous two-phase systems (ATPSs) formed by poly(ethylene glycol) (PEG) of different molecular weights (1000, 2000, 6000) + ammonium carbonate ((NH 4 ) 2 CO 3 ), ammonium tartrate ((NH 4 ) 2 C 4 H 4 O 6 ), diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ), ammonium sulfate ((NH 4 ) 2 SO 4 ) + water were determined at 298.15 K, respectively. The binodal data were correlated by using a four-parameter equation. The effect of PEG molecular weight on binodal curves was investigated, and it was found that the biphasic region expanded with an increase in PEG molecular weight. Meanwhile, it was also observed that the ability of the investigated salts for phase separation follows the order: (NH 4 ) 2 HPO 4 > (NH 4 ) 2 SO 4 > (NH 4 ) 2 C 4 H 4 O 6 > (NH 4 ) 2 CO 3 . Furthermore, a relatively simply two parameter equation, Othmer–Tobias and Bancroft equations was successfully used to correlate the tie-line data.
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危险品化学品经营许可证（带存储）