RSC Advances
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2025
·Vol. 15
·期 18
·14235-14245
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IF 4.6
Tong Su,Daguo Wu,Xinghua Zhang,Qi Zhang,Lungang Chen,Xiuzheng Zhuang,Longlong Ma
Biomass is an important renewable resource in nature, and cellulose is a crucial component within it. The chemically directed conversion of cellulose into ethylene glycol offers a green alternative to traditional petroleum-based production methods. In this study, a multifunctional Ni–WOx/SAPO-11 catalyst was designed. By optimizing the processing parameters of catalysts and the reaction conditions of them, it was demonstrated that this catalyst could efficiently catalyze cellulose into alcohol products through a series of tandem reactions such as hydrolysis, retro-aldol condensation, and hydrogenation under relatively mild conditions. The yield of ethylene glycol climbed from 4% (at 180 °C) to 66.6% (at 240 °C) with the increase of reaction temperature. Characterization (XPS, TEM, TPD/TPR) revealed that a reduction temperature of 500 °C maximized Brønsted acidity and W5+/W6+ ratios, enhancing C–C cleavage efficiency. Further increases in the reduction temperature would weaken the Brønsted acid on the surface of SAPO-11, but its surface area would also increase (mainly in the form of mesopores). The uniformly dispersed elemental tungsten could form new acidic sites on the catalyst surface; in combination with active Ni0, this high-temperature reduced catalyst could achieve the direct hydrogenolysis of cellulose to produce ethylene glycol, benefiting the efficient utilization of lignocellulosic biomass in the future.
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Journal of Energy Storage
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2025
·
IF 9.8
Yinjia Su,Yu Mao,Jing Li,Keai Tao,Jiawei Huang,Yingjie Ma,Kuan Sun
In recent years, high-conductivity fillers were used to enhance the thermal conductivity of composite phase change materials (CPCMs), yet challenges such as interfacial thermal resistance and poor dispersion remained. In this study, polyethylene glycol was used as the matrix and chemically crosslinked with graphene oxide (GO) to construct a three-dimensional crosslinked network structure. Specifically, graphene oxide was fabricated into a three-dimensional framework and subsequently was loaded with polyethylene glycol, thereby producing a novel functionalized graphene composite phase change material (CPCM). Compared with traditional physical mixing methods, this method significantly increased the thermal conductivity of the composite material by reducing the interfacial thermal resistance, resulting in an almost doubled thermal conductivity. The study systematically conducted structural characterization, thermal property testing, and photothermal performance analysis of the materials. Since this preparation system effectively avoided the introduction of exogenous impurities, it offered a significant advantage in retaining the enthalpy value of the CPCM. The melting enthalpy of physically blended systems reached 157.97 J/g, while cross-linked systems exhibited 173.05 J/g, corresponding to 98.3 % enthalpy efficiency relative to pristine PEG6000 (176.06 J/g), surpassing most reported values in literature. The results of cycling stability and thermal stability experiment also indicated that the crosslinked system possessed outstanding temperature stability and cyclic capability. The retention of enthalpy is still 97.5 % even after 500 cycles. In addition, GO conferred PEG with better photothermal conversion capability, and the highest photothermal conversion efficiency was 85.1 %, which had great application prospects in solar thermal. Furthermore, the leakage resistance test results showed that the composite material had excellent leakage prevention properties. The experiments verified the effective crosslinking mechanism between PEG and GO, indicating that the constructed three-dimensional structure not only optimized the thermal response behavior of the composite material but also enhanced the system's adaptability in multiple thermal environments. These results demonstrate that chemical cross-linking offers clear advantages over physical mixing, providing a promising pathway for advanced low-grade thermal energy storage applications.
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Acta Biomaterialia
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2018
·
IF 6.383
Huan Yang,Cui Tang,Chunhua Yin
Estrone-modified glycol chitosan nanoparticles (GCNP-ES) based on the mechanisms of ES-mediated endocytosis and intracellular pH-responsive drug release were developed for the treatment of breast cancer. GCNP-ES were prepared by grafting copolymerization of glycol chitosan with 2-(diisopropylamino)ethyl methacrylate to generate GCNP prior to ES conjugation. The particle size, zeta potential , and paclitaxel (PTX) encapsulation efficiency of GCNP-ES were characterized. In particular, GCNP-ES exhibited pH-responsive dissociation properties while maintaining stability under long-term storage and lyophilization. The drug release of PTX-loaded GCNP-ES (PTX/GNCP-ES) was modestly prolonged with considerable pH sensitivity. GCNP-ES promoted internalization in breast cancer MCF-7 cells by approximately 5-fold as compared to GCNP, and the internalized GCNP-ES was mainly localized in the endosomes of MCF-7 cells. PTX/GNCP-ES exhibited higher cytotoxicity and cell apoptosis ratio than GCNP. In mice with MCF-7 breast cancer xenograft, PTX/GCNP-ES showed higher accumulation at the tumor site, which resulted in a higher tumor inhibition ratio (81.4%) than that achieved by PTX/GCNP (69.4%) and PTX solution (48.8%). Furthermore, no histological and hematological toxicity was detected in in vivo studies of PTX/GCNP-ES. Overall, these results suggested the potential applicability of GCNP-ES as a drug delivery system for breast cancer therapy. Statement of Significance Most breast cancers are hormone dependent. Herein, we developed a estrone-modified glycol chitosan nanoparticles (GCNP-ES) as a drug delivery system to overcome the drawbacks of chemotherpeutic drugs, including poor water solubility and lack of specifity. GCNP-ES could provide efficient drug delivery in breast cancer cells. The study demonstrated that GCNP-ES could dissociate under mildly acidic conditions, leading to the timely payload release of the drug in target tumor cells following internalization. The conjugated estrone of the nanoparticles could significantly increase drug accumulation in the tumor site and result in enhanced therapeutic effect. Thus, the potential applicability of GCNP-ES was suggested.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jialin Fan,Xiaoxing Ke,Ge Chen,Yong Yan
The industrial synthesis of ethylene glycol (EG) via ethylene oxide hydration is energy-intensive and environmentally harmful due to high greenhouse gas emissions. Although electrochemical oxidation presents a more sustainable route for the direct synthesis of EG from ethylene, existing technologies are hampered by limited catalytic performance stemming from inadequate regulation of the key intermediate, adsorbed hydroxyl radicals (*OH). Herein, we employ a structural engineering strategy to fabricate a PdPtRh trimetallic alloy catalyst by introducing highly electronegative platinum (Pt) and rhodium (Rh) into a palladium (Pd) matrix. By precisely tuning the catalyst’s electronic structure, we effectively optimize the adsorption strength of *OH. Benefiting from this alloying effect, the developed PdPtRh catalyst demonstrates exceptional performance in the ethylene-to-EG conversion, achieving a peak Faradaic efficiency of 52 % and a production rate of 7.61 μmol/cm 2 /h-markedly superior to conventional monometallic Pd catalysts. Density Functional Theory (DFT) calculations further reveal that the alloy structure facilitates charge redistribution among the metals, effectively lowering key energy barriers in the reaction process. This work not only offers a novel design paradigm for developing efficient, eco-friendly catalysts for EG electrosynthesis but also highlights the immense potential of harnessing multimetallic synergistic effects to optimize performance in the field of electrocatalysis.
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CATALYSIS TODAY
·
2018
·
IF 4.667
Dawang Chu,Chen Zhao
The effective and selective conversion of cellulose to valuable fuels and chemicals is highly attractive. In this paper, we prepared a catalyst with the adjacent surface Cu° and oxygen-deficient WO x (2 < x < 3) species by reduction of CuWO 4 precursor, and such catalyst coupled with Ni/activated carbon (AC) attained high yield (71 wt%) and good cycling performances in catalyzing one-step hydrothermal conversion of cellulose to ethylene glycol (EG), highly superior to the performances on physically mixed Ni/C, Cu/C and WO 3 . The increased Cu doping amounts led to a higher ratio of the lower valence state W (V or IV) to the high valence W(VI) as indicated by XPS, XRD, and TPR-H 2 analyses. The oxygen vacancies on the hydrogen-reduced CuWO 4 sample dramatically increased, probably due to the benefits from the substantial dissociated H• on the neighboring Cu° center. The EG yields from cellulose are shown to be proportional to the concentrations of oxygen vacancies on WO x , which catalyzes the important elementary retro-aldol step reaction via adsorbing C 6 sugar intermediates in a specific way. It is inferred that Cu introduction is mainly used to create more oxygen vacancies on the WO x surface that helps adsorbing oxygenates, while Ni fast hydrogenates of hydroxyacetaldehyde to EG and avoids coking, constructing a multi-functional synergistic catalytic process from converting of cellulose to EG in the high-temperature water
研究领域:
催化化学
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生物质转化
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绿色化学
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材料化学
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能源化学
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JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 2.8
Hongdan Bao,Kaiyuan Huo,Jing Zou,Hao Chen,Guangyu Chen,Hengrui Zhang,Yan Guo,Na Li,Weidong Xia
Adhesives are essential in diverse industrial fields, and bioadhesives play a critical role in medicine for minimally invasive tissue repair and device integration. However, existing systems, particularly polyethylene glycol (PEG)-based adhesives, often suffer from brittleness, inadequate performance under extreme temperatures, and limited substrate versatility. To overcome these challenges, we developed a novel polyphenol-PEG adhesive platform through citric acid (CA)-mediated liquid–liquid phase separation (LLPS). This process, driven by CA-regulated hydrogen bonding as confirmed by XPS, FTIR, UV spectroscopy, and solution studies, produces adhesives with exceptional properties: peel strength near 15 N/cm, shear strength exceeding 4 MPa on hydrophilic substrates, rapid adhesion within 10 s, and operational stability from liquid nitrogen temperatures up to about 150°C, maintaining over 1 MPa shear strength at 200°C exposure. The adhesive demonstrates effective sealing of fractured bone, adhering to wet biological tissues and serving as an eco-friendly solution for restoring cultural artifacts. This study establishes the condensate formed by the CA-regulated LLPS process in the polyphenol-PEG system as a novel, ultra-robust adhesive suitable for demanding biomedical and industrial applications.
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Frontiers in Pharmacology
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2026
·
IF 5.4
Chen Bao,Decai Wang,Chao Liu,Meizhou Zhang,Qian Liu,Jiannan Hu,Yuzhou Wu,Shuyun Xu
Ferroptosis is an iron-dependent programmed cell death mechanism triggered by the accumulation of lipid-based reactive oxygen species (ROS). It is closely implicated in the pathogenesis of asthma. Liproxstatin-1 (LIP-1) is a ferroptosis inhibitor that is beneficial for treating neutrophilic asthma. However, low water solubility, limited blood concentration, and poor mucus permeability and biocompatibility limit the therapeutic efficacy of LIP-1. In this study, we successfully constructed polydopamine–polyethylene glycol–LIP-1 nanoparticles (PDA-PEG-LIP-1 NPs) for the treatment of neutrophilic asthma. Inhalation of PDA-PEG-LIP-1 NPs effectively inhibited lipopolysaccharide (LPS)- and interleukin (IL)-13-induced ferroptosis by alleviating lipid peroxidation and ROS production and chelating free ferrous ions (Fe 2+ ). In addition, results from asthma mouse models demonstrated that inhalation of PDA-PEG-LIP-1 NPs could overcome the limitations of LIP-1 and effectively inhibit ferroptosis. This research suggests that PDA-PEG-LIP-1 NPs are an effective, practical, and safe option for treating neutrophilic asthma.
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ACS Applied Energy Materials
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2025
·
IF 5.5
Hengji Zhao,Yaowu Zhang,Bin Xu,Shuguang Chen,Bo Liu
Efficient and cost-effective technologies are highly desired to convert a tremendous amount of low-grade waste heat to electricity. Although the thermally regenerative electrochemical cycle (TREC) has attracted increasing attention, its unsatisfactory thermal-to-electrical conversion efficiency often limits its practical applications. In this work, a strategy based on temperature-sensitive crystallization is demonstrated in a TREC system to boost its thermoelectric performance by rationally regulating the activities of the redox couple at different temperatures. With a Zn anode and a [Fe(CN)6]4–/3– catholyte modified with propylene glycol, the TREC flow cell presents a high temperature coefficient of −2.0 mV K–1 and achieves an apparent thermoelectric efficiency of 6.72% relative to the Carnot efficiency in the temperature range of 25–50 °C. This strategy of using a common industrial solvent to induce a reversible phase transition can inspire research into high-efficiency and cost-effective TREC devices for practical low-grade heat harnessing.
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TRIBOLOGY INTERNATIONAL
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2026
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IF 7.6
Yong Xu,Shuang Li,Sane Zhu,Hua Zhong,Kunhong Hu,Tianhui Ren
UiO-66 nanoparticles are highly promising candidates for lubricating additives, owing to their favorable mechanical properties and high thermal stability. However, the macroscopic lubrication performance of UiO-66 nanoparticles relying on the ball-bearing mechanism falls significantly short of their microscopic theoretical prediction values. Herein, core–shell structured UiO-66@PDA/MoA nanocomposites were synthesized via a mussel-inspired hybrid strategy using UiO-66 as the core and PDA/MoA layers as the shell. The addition of 0.5 wt% UiO-66@PDA/MoA endowed PEG200 with ultralow friction coefficient (0.0180) and wear volume (6.22 ×10 4 μm 3 ). Compared with PEG200, the introduction of 0.5 wt% UiO-66@PDA/MoA composites decreased the friction coefficient by 50.7% and wear volume by 49.1%. The ultralow friction behavior of UiO-66@PDA/MoA nanocomposites was attributed to the synergistic lubrication of the PDA/MoA layer and UiO-66. Raman spectroscopy and first-principles calculations demonstrated that the introduction of MoA molecules promoted the formation of carbonaceous components with higher graphitization degree in the tribofilm. This design concept of integrating nano-MOF with organic molybdenum provides a novel strategy for developing lubricant additives with ultralow friction.
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NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.6
Xiaoxia Tian,Shuxin Liu,Jiuzhou Zhao,Jiayao He,Liang Xian
In this paper, copper-doped N-containing carbon materials (CuCN) were obtained by pyrolyzing copper acetylacetonate using a metal–organic skeleton (ZIF-8) at 900 °C. Pd/CuCN nanomaterials were synthesized using a photochemical method assisted by the ethylene glycol reduction strategy. The precise preparation of Pd/CuCN nanomaterials was realized by regulating different wavelengths of the light source and different precursor concentrations in the photochemical process to control the particle size, morphology, and crystal structure effectively. The results showed that the catalyst 10Pd/CuCN-3 prepared under green light at a wavelength of 550 nm and a precursor concentration of 10 mM had high catalytic activity. Its degradation rate constant for 4-NP was 1.77 min−1 and the conversion rate was maintained at about 90% after five cycles of reaction, which showed good durability and conversion rate. This study demonstrates that visible light can effectively control and prepare palladium nanoparticles of smaller size.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Mu-Han Chen,Yi-Di Hu,Yu-Jie Wu,Jia-Xing Guo,Kai Ke,Yu Wang,Bo Yin,Wei Yang
Piezoelectric silk fibroin (SF) shows great potential in fabricating sustainable wearable electronics toward health monitoring and human–machine interfacing, yet the processing difficulty and brittleness restrict its practical applications severely. This study proposes a simple strategy to achieve the boosted piezoelectricity and mechanical properties in electrospun regenerated silk fibroin (RSF) nanofiber mats by adding polyethylene glycol (PEG) with different molecular weights to induce the formation of β-sheets via hydrogen bonding and the regulation of PEG phase morphology. Specifically, RSFs consisting of PEG of 2000 and 1000 Da exhibit a significant improvement in the tensile strength (from 6.1 to 9.92 MPa) and elongation at break (from 5.72% to 117.58%), respectively. Meanwhile, RSFs consisting of PEG with a molecular weight of 2000 and 400 Da show a direct piezoelectric force sensitivity of 0.2 mV/N·μm and 0.14 mV/N·μm respectively, superior to that of pure RSF (0.04 mV/N·μm). The piezoelectric force sensors fabricated with RSFs show potential applications in the detection of diverse human motions, including finger tapping for Morse code, grip strength, and knee flexion. Thus, this work unveils a facile strategy to fabricate RSF-based biodegradable piezoelectric force sensors with a trade-off in processability, mechanical ductility, and piezoelectricity.
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Nanoscale
·
2026
·
IF 5.2
Anqi Zhao,Mengyun Hu,Jie Li,Xinyu Gu,Changqing Ye,Yukou Du
The application of direct ethylene glycol fuel cells (DEGFCs) faces challenges such as sluggish anode reaction rates and incomplete ethylene glycol oxidation. To tackle these issues, we adopted a straightforward chemical reduction approach for the synthesis of sea urchin-like PdAg nanospheres (PdAg NSs). Concurrently, we investigated the influence of varying Pd/Ag molar ratios on the ethylene glycol oxidation reaction (EGOR). Our results demonstrate that sea urchin-like nanospheres with distinct morphological features can be successfully synthesized with different Pd/Ag ratio combinations. Electrochemical analyses reveal that the rational design of bimetallic catalysts can enhance catalytic activity, which is primarily attributed to the ligand effect. Notably, Pd4Ag NSs exhibit the highest mass activity of 5.98 A mgPd−1, significantly outperforming commercial Pd/C catalysts. Moreover, Pd4Ag NSs also demonstrate superior electrochemical stability in both chronoamperometry (CA) and cyclic voltammetry (CV) tests. In addition, the faradaic efficiency (FE) of the cleavage products was evaluated. A volcano-type relationship was observed between the FE of cleavage products and the applied potential. The results indicate that 0.96 V vs. RHE is the optimal potential for the formation of cleavage products, at which the corresponding FE reaches 15%. This study not only provides insights into the synthesis of high-stability Pd-based nanomaterials but also reveals the relationship between potential and oxidation products in the ethylene glycol oxidation reaction (EGOR).
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