MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Jiahui Lin,Boyan Fu,Leyao Bi,Jiaxing Fu,Junsheng Wen,Wenyue Tian,Chunjie Wang,Yue Wang
Ethylene glycol is a toxic contaminant, hence the monitoring of its vapor is crucial for environmental safety and human health. In this study, CuO/GO ultrathin nanosheet composites were successfully synthesized via a one-step chemical precipitation method, and subsequently used for the detection of low concentrations of ethylene glycol at low temperatures. The test results indicate that CuO/0.7GO shows a response of 39.5 at 110 °C for 10 ppm ethylene glycol, which is 19 times greater than that of CuO, and the optimal operating temperature reduced by 20 °C compared to CuO. Notably, CuO/0.7GO still demonstrates a response of 7.02 for 1 ppm ethylene glycol. Furthermore, the CuO/0.7GO sensor exhibits significant selectivity, repeatability, and long-term stability toward ethylene glycol. The morphology, microstructure, and elemental composition of the materials were characterized by XRD, SEM, TEM, EDX, FT-IR, XPS, and UV–Vis. Finally, the gas sensing mechanism of the composite material toward ethylene glycol was discussed in depth, emphasizing that the enhanced gas sensing performance was attributed to the synergistic effect between the abundant chemisorbed oxygen and the hybrid heterojunctions.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Anqi Zhao,Mengyun Hu,Zhengying Wu,Yong Wang,Jie Li,Yukou Du
Precisely tuning the morphology of palladium-based alloys is an effective strategy for enhancing the catalytic activity in alcohol electrooxidation. However, methods for synthesizing well-defined nanowires are often not universally applicable and tend to be relatively complex. In this study, we developed a universal method to synthesize PdM nanowires (M = Sn, Pb, Sb, Bi) using a straightforward one-pot solvothermal co-reduction technique. The electronic properties of palladium can be modified through the doping of other elements. The bimetallic synergistic effect endows PdSn nanowires (PdSn NWs) with exceptional catalytic activity in both the ethylene glycol oxidation reaction (EGOR) and the ethanol oxidation reaction (EOR). Specifically, the mass activity of PdSn nanowires in the EGOR was measured at 7.56 A mgPd⁻¹, which is 3.86 times more than that of commercial Pd/C. In the EOR, the mass activity reached 6.43 A mgPd⁻¹, demonstrating an 8.14-fold enhancement over commercial Pd/C. Furthermore, PdSn nanowires also exhibited excellent stability during stability tests. This study provides significant insights into the development of nanowires catalysts with highly efficient alcohol electro-oxidation performance.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Mingqiang Chen,Zhiwei Yang,Haosheng Xin,Yishuang Wang,Defang Liang,Chang Li
As a major constituent of renewable biomass, conversion of cellulose to high-value chemicals presents a promising strategy. Herein, we designed a multifunctional Ni@C/WOx catalyst for direct cellulose conversion to ethylene glycol. This catalyst exhibited excellent stability while achieving a high ethylene glycol yield (69.4%). Graphene-encapsulated metal Ni stabilized hydrogenation activity and minimized metal leaching. The interaction between Ni@C and WOx facilitated the reduction of WOx and increased the formation of W5+ species. Characterization by electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), NH3-TPD, and Py-IR confirmed that W5+ formation induces oxygen vacancies and acid sites on the catalyst support surface. At 30% Ni loading, strong metal–support interactions maximized the W5+ concentration and oxygen vacancy, enhancing the C–C bond cleavage efficiency. Consequently, the synergistic effect between Ni@C and WOx effectively facilitates key steps in cellulose conversion to ethylene glycol: cellulose hydrolysis, glucose retro-aldol condensation, and glycolaldehyde hydrogenation. The understanding of these structure–performance relationships has provided new ideas for the green and sustainable production of high-value-added chemicals from cellulose.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinyu Zhai,Chunchen Ruan,Lei Chen,Xiaotian Peng,Shuai Yin,Hao Peng
The binary alkane system (C 6 -C 7 , C 6 -C 8 ) was comprehensively explored in this study, and the best cryogenic eutectic n-alkane (70 %C 6 -30 %C 7 ) with freezing point of −115.8℃ and phase transition enthalpy of 123 J/g was designed. After comparing various non-ionic emulsifiers (Span 80, Tween 80, PVA 1788, Arabic gum, Xanthan gum) through volatilization test, Span 80 was selected as the best anti-volatilization emulsifier to synthesize MEPCMs. Different anionic and nonionic emulsifier ratios were studied and determined to be 9:1. Cryogenic MEPCMs were prepared by in-situ polymerization, and the energy storage, thermodynamic, anti-volatilization properties, anti-leakage, mechanical property and durability were characterized. The results show that the morphology of MEPCMs is complete, the core wall materials are well bonded, and the coating rate is 50.9 %. PEG was used as a cross-linking agent to modify the shell of MEPCMs. The characterization results show that PEG effectively improvs the flexibility of the wall material, and the enthalpy loss of the MEPCMs in the anti-leakage test is reduced from 66.4 J/g to 15.8 J/g. The preferred anti-volatilization emulsifier increases the durability of MEPCMs from 192 h to 240 h. After 60 phase transition cycles, the enthalpy value of the MEPCMs is almost unchanged. This study bridges the volatility defects of cryogenic phase change materials and strengthens the durability of MEPCMs in terms of both core-wall and wall materials, which provides an important basis for the utilization of cold energy in cryogenic systems such as LNG, liquid hydrogen, and liquid air.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 2
·1-15
·
IF 23.2
Hu Yang,Zhang Mengyang,Quan Bingqing,Li Xiaolong,Hu Xinpeng,Wu Hao,Huang Xianrong,Lu Xiang,Qu Jinping
With the sharp increase in modern energy consumption, phase change composites with the characteristics of rapid preparation are employed for thermal energy storage to meet the challenge of energy crisis. In this study, a NaCl-assisted carbonization process was used to construct porous Pleurotus eryngii carbon with ultra-low volume shrinkage rate of 2%, which provides enormous space for encapsulation of PEG-4000. Such composite possesses exceptional thermal stability, with an absorption rate of 88.24%, a melting enthalpy of 174.87 J/g, and a relative enthalpy efficiency of 97.78%. Consequently, the resultant composites exhibit outstanding performances in storing and releasing thermal energy for photo-thermal, electric-thermal, and magnetic-thermal conversion. This study presents a highly valuable strategy into the quick fabrication of phase change composites, facilitating their practical applications in thermal energy storage. Graphical Abstract
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 39
·期 1
·e7935
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IF 3.7
Shu Qian,Fengli Yu,Yexin Luo,Bing Yuan,Congxia Xie,Shitao Yu
The oxidation of toluene to benzaldehyde holds great industrial significance, and it typically involves toxic reagents and/or affords difficult-to-separate product mixtures. Herein, polyethylene glycol (PEG)–bridged diimidazolium polyoxometalates (POMs) with a Keggin-type tungstovanadophosphoric heteropolyacid anion and various PEG-functionalized diimidazolium cations were prepared and evaluated as catalysts for the eco-friendly oxidation of toluene using aqueous tert -butyl hydroperoxide in acetonitrile. The bridging of diimidazolium cations by PEG enabled the fine-tuning of heteropolyanion redox properties and increased catalyst reactivity and solubility in the reaction system. The best-performing POM exhibited thermoregulated phase-separation behavior, that is, it was fully soluble in the reaction medium at elevated temperatures and hardly soluble at room temperature. Further, it showed almost no performance deterioration after sevenfold reuse and achieved an acceptable toluene conversion (82%) and benzaldehyde selectivity (68%). Thus, our work enables the development of eco-friendly processes for the catalytic oxidation of industrially relevant hydrocarbon and thus facilitates the establishment of a more sustainable society.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ziru Yu,Zhenghua Guo,Liang Yu,Xiao Feng,Bo Wang
Various metal–organic framework (MOF)-based porous nanomaterials have been adopted to fabricate mixed matrix membranes (MMMs) aiming at breaking through the Robeson upper bound of individual polymer membranes for gas separation. However, the insufficient compatibility between the polymeric matrix and MOF nanofillers limits the further improvement of their gas separation performance. To overcome this challenge, we constructed relatively ideal Pebax/PEG/NH2–UiO-66 mixed matrix membranes inspired by θ solvent theory of polymer solutions. Polyethylene glycol (PEG) molecules were introduced to selectively swell the polar poly(tetramethylene oxide) (PTMO) domains of the Pebax matrix via hydrophobic–hydrophilic interactions and in turn furnished dispersed “nests” for NH2–UiO-66 nanofillers with polar nature to reduce the interparticle agglomeration (PEG nesting effect). MOF nanofillers tended to be relatively undisturbed, in which either the rigidity of polymer chains or the pore blocking of MOFs seen in unideal MMMs was restricted. The PEG “nesting effect” proposed herein could bring benefits to further improve the allowed maximum loading capacity of MOF nanofillers as well as adjust the interactions therein and therefore maximize the CO2 separation performance of Pebax/PEG/NH2–UiO-66 MMMs. Compared with individual Pebax membranes, Pebax/PEG/NH2–UiO-66 with a 15 wt % loading of NH2–UiO-66 showed a 73% higher CO2 permeability (210 barrer) and a 220% higher CO2/N2 selectivity (130), which demonstrated the most dramatical increases among Pebax-based MMMs until now and as well significantly exceeded the Robeson upper bound. Therefore, the proposed PEG “nesting effect” for the preparation of θ-type MMMs holds promising potential for membrane-based carbon capture and is possibly extended to the preparation of other MMMs.
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PHARMACEUTICAL DEVELOPMENT AND TECHNOLOGY
·
2024
·
IF 2.6
Jingmou Yu,Mengqi Liu,Chao Zhang,Lizhen Cheng,Changchun Peng,Dengzhao Jiang,Wenbo Liu,Hongguang Jin,Jin Ren
Herein, we designed and synthesized novel reactive oxygen species (ROS)-responsive glycol chitosan-doxorubicin (DOX) prodrug via a ROS-cleavable thioketal (TK) linker. The obtained GC-TK-DOX formed self-assembled nanoparticles of 312 nm in aqueous media. Photosensitizers zinc phthalocyanine (ZnPc)-loaded GC-TK-DOX (GC-TK-DOX/ZnPc) nanoparticles were fabricated by using a dialysis approach. The GC-TK-DOX and GC-TK-DOX/ZnPc nanoparticles were nearly spherical by transmission electron microscopy (TEM) observation. Under 660-nm laser irradiation, GC-TK-DOX/ZnPc could generate singlet oxygen. Further, GC-TK-DOX/ZnPc nanoparticles exhibited ROS-sensitive release of DOX and ZnPc in vitro. GC-TK-DOX/ZnPc with laser irradiation showed more drug uptake and higher cytotoxic effects than GC-TK-DOX/ZnPc without irradiation, free DOX and GC-TK-DOX in HeLa tumor cells. Overall, these findings suggested that GC-TK-DOX/ZnPc could be a promising nanoarchitecture for synergetic chemo-photodynamic therapy against tumors.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xinyi Liu,Zhen Cheng,Nan Chen,Feng Xu,Jian Liu,Lei Ni,Juncheng Jiang
Propylene glycol ethers are a series of fine chemical products with a wide range of applications and are one of the important industrial derivatives of epoxy compounds; the thermal hazards and exothermic mechanism of the reaction process have rarely been investigated in previous studies. In this study, propylene glycol butyl ether (PNB) was prepared by the reaction of propylene oxide (PO) with n-butanol catalyzed by potassium hydroxide in semibatch mode. A Box–Behnken design (BBD) method with four factors and three levels was carried out to optimize the yield and other process parameters of the reaction. The results showed that after optimization, the maximum yield and the minimum system pressure were 85.91% and 1.752 bar, respectively, when the reaction temperature was 110 °C, the alcohol–alkane ratio was 4, the dosing rate was 10 mL/min, and the catalyst concentration was 0.5%. The thermal behavior of the propylene glycol butyl ether synthesis process was investigated by reaction calorimetry. Fourier transform infrared (FTIR) spectroscopy was used to monitor the concentration changes of the reactants and products. Differential scanning calorimetry and adiabatic calorimetry were used to study the thermal stability of the products. Meanwhile, density functional theory calculations were implemented to understand the reaction pathways and associated energies. Furthermore, the thermal runaway risk of the reaction was assessed by the risk matrix method and Stoessel criticality diagram. The results indicated that the risk level was acceptable and the critical class for this reaction was of grade 3. These findings provide guidance for the safe operation of PNB synthesis from PO, which can be used for further scale-up.
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Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 25
·3937-3945
·
IF 0
Moyun Chen,Weizhi Wang,Xiaoping Wu
Water-soluble fluorescent carbon nanodots (CNDs) were fabricated directly from polyethylene glycol (PEG) by a simple one-pot thermal treatment. In the formation of such CNDs, PEG played two essential roles: the carbon source and surface passivating agent. CNDs were used directly without any additional separation or purification procedure and yet have a comparable quantum yield with self-surface passivation CNDs or passivation-absent ones. The products were shown to be soluble in water and common organic solvents, and emitted bright multicolor fluorescence with excitation and pH dependent emission properties. The extensive characterization results likewise gave an insight into the formation and the luminescence mechanism of the CNDs. Cytotoxicity tests and cellular uptake experiments of the CNDs further demonstrated their viability in biochemical applications.
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PubMed
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 43
·7612-7619
·
IF 0
Ying Wang,Qiaojie Luo,Rui Sun,Guangyu Zha,Xiaodong Li,Zhiquan Shen,Weipu Zhu
We report a facile strategy to synthesize pH-sensitive amphiphilic oligo(ethylene glycol) (OEG)–doxorubicin (DOX) alternative conjugates. Poly[oligo(ethylene glycol) malicate] (POEGM) with numerous pendent hydroxyl groups was first synthesized by the direct polycondensation of oligo(ethylene glycol) (OEG) with malic acid under mild conditions. Then, benzaldehyde groups were introduced into the POEGM backbone via esterification between the pendant hydroxyl groups and 4-formylbenzoic acid. DOX moieties were finally attached to the polymeric backbone via benzoic imine linkages to obtain the OEG–DOX conjugates. Because of the high molecular weight and alternate architecture, this type of amphiphilic OEG–DOX alternative conjugates can form stable micelles in aqueous solution with a high DOX loading content (38.2 wt%) and low critical micelle concentrations (0.021 mg mL−1). Due to the pH-sensitive benzoic imine linkages between the DOX moieties and polymeric backbone, DOX could be rapidly released from the micelles at pH 5.8, whereas only a minimal amount of DOX was released at pH 7.4 under the same conditions. The cytotoxicity assay indicates that the OEG–DOX conjugates show cytotoxic effects to MCF-7 tumor cells, while the corresponding polymer material POEGM–CHO exhibits a great biocompatibility for MCF-7 tumor cells. These pH-sensitive and high drug loading nano-carriers based on the OEG–DOX alternative conjugates provide a promising platform for targeted cancer therapy.
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PubMed
Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Xu Yan,Qi Jingqi,Sun Wei,Zhong Wu,Wu Hongwei
Zoledronic acid (ZOL) has been approved as the only bisphosphonate for the prevention and treatment of metastatic bone diseases with acceptable safety and tolerability. However, systemic or direct injection of ZOL often causes severe side effects, which limits its clinical application. Here, an innovative nano-drug delivery system, ZOL-loaded hyaluronic acid/polyethylene glycol/nano-hydroxyapatite nanoparticles (HA-PEG-nHA-ZOL NPs), has been found to effectively inhibit the proliferation of three types of human osteosarcoma cell lines (143b, HOS, and MG63) at 1–10 μmol/L, while with low cell cytotoxicity on normal cells. The NPs significantly enhanced the apoptosis-related protein expression and tumor cell apoptosis rate. The NPs could also inhibit the proliferation of osteosarcoma cells by blocking the S phase of the cell cycle. In the orthotopic osteosarcoma nude mice model, local injection of the HA-PEG-nHA-ZOL NPs stimulated tumor necrosis, apoptosis, and granulocyte infiltration in the blood vessels. Altogether, the ZOL nano-delivery system possesses great potential for local treatment to prevent local tumor recurrence and can be applied in clinical osteosarcoma therapy.
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