FUEL
·
2020
·
IF 5.578
Jing-Pei Cao,Tao Xie,Xiao-Yan Zhao,Chen Zhu,Wei Jiang,Ming Zhao,Yun-Peng Zhao,Xian-Yong Wei
Selective hydrogenolysis, the aromatic ether C-O bonds under mild conditions, is crucial for the valorization of lignin. In this context, the effects of H 2 and solvent on the hydrogenolysis of lignin model compounds over Ru catalysts were explored. With H 2 as hydrogen donor, the Ru/AC exhibited the highest activity for converting lignin model compounds into monomeric compounds, whereas H 2 led to low selectivity of aromatics. However, isopropanol was the good H-donor solvent, which could provide a large amount of active hydrogen to promote the cleavage of C-O bonds. Additionally, the yield of aromatics in isopropanol was higher than that under H 2 atmosphere. It could be ascribed to the fact that isopropanol is the protic solvent which displays Lewis basicity, and is a good H-bond donor and a good H-bond acceptor. The higher electron-releasing inductive effect of isopropanol made it easier to provide active hydrogen. Based on the experiments, the mechanism of benzyl phenyl ether hydrogenolysis in H 2 and isopropanol system was presented.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Wei Song,Hanqing Zhao,Jianqi Ye,Mengmeng Kang,Siyu Miao,Zhong Li
Ti–O–C channels for ultrafast sodium storage were constructed in N/S-co-doped TiO2–C nanofibers, which deliver a high rate performance of 181.9 mAh g–1 at 5 A g–1 after 3000 cycles. The existence of Ti–O–C bonds at the interface of TiO2–C phases was revealed by synchrotron radiation X-ray absorption spectra. Based on this, first-principles calculations further verified the low energy barrier for Na+ insertion/extraction in the Ti–O–C channels formed by the intimately integrated graphite layer with TiO2 near the surface. In addition, surface defects induced by heteroatoms accelerate the Na+ mass transfer through the pathway from the carbon surface to the Ti–O–C channel.
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DOI
PubMed
高影响因子
AAPS PHARMSCITECH
·
2021
·Vol. 22
·期 7
·1-7
·
IF 3.246
Wang Beilei,Shan Xiaoxiao,Lv Shujie,Zha Liqiong,Zhang Caiyun,Dong Qiannian,Chen Weidong
3-O-β-D-galactosylated resveratrol (Gal-Res) was synthesized from resveratrol (Res) and 3-O-β-D-galactose (Gal) in our previous study. In order to improve the pH sensitivity and bioavailability of Gal-Res, Gal-Res nanoparticles (Gal-Res NPs) were prepared using polydopamine (PDA) as a drug carrier. The drug loading (DL %) and entrapment efficiency (EE %) of Gal-Res NPs were 46.80% and 88.06%. The average particle size, polydispersity index (PDI), and Zeta potential of Gal-Res NPs were 179.38 ± 2.83 nm, 0.129 ± 0.013, and − 28.05 ± 0.36 mV, respectively. The transmission electron microscope (TEM) showed that Gal-Res NPs had uniform spherical morphology. Compared with the fast release of raw Gal-Res, the in vitro release of Gal-Res NPs was slow and pH-sensitive. The results of the blood vessel irritation and hemolysis test demonstrated that Gal-Res NPs had good hemocompatibility. The pharmacokinetics study in rats showed that area under the curve of plasma drug concentration time (AUC 0→600 ) and half-life (t 1/2 ) of Gal-Res NPs were enhanced 1.82-fold and 2.19-fold higher than those of raw Gal-Res. The in vivo biodistribution results showed that Gal-Res NPs were more distributed in liver tissue than Gal-Res. Gal-Res NPs with high bioavailability and liver accumulation were hopeful drug delivery systems (DDS) to treat liver diseases. Graphical abstract
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PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2018
·
IF 1.666
Chao Wu,Peilun Xu,Bailong Xu,Wei Li,Sujing Li,Xiangqian Wang
In this study, one- and two-phase partitioning biotrickling filters (1P-BTF and 2P-BTF, respectively) inoculated with a pre-acclimated mixed culture were examined for the removal of hydrophobic and refractory o-xylene. A small fraction of silicone oil (5% v/v) was added as a non-aqueous phase. Due to the presence of silicone oil, the 2P-BTF exhibited superior performance and stability for o-xylene biodegradation at steady and transient operations. Higher macro-kinetic constants for o-xylene removal by the Michaelis–Menten model were obtained for the 2P-BTF with a saturation constant of 0.396 g m−3 and a maximum elimination capacity of 105.7 g m−3 h−1. The enhancement of removal performance for the 2P-BTF was supported by dominant specialized microorganisms with o-xylene biodegradability. The diversity of microbial community was influenced by the presence of silicone oil. This study demonstrated that a BTF with 5% of silicone oil could be applied for the treatment of hydrophobic and refractory volatile organic compounds. It also provided valuable information for better understanding the relationship between microbial community and removal performance using two-phase partitioning bioreactors.
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DOI
PubMed
高影响因子
Carbohydrate Polymer Technologies and Applications
·
2021
·
IF 0
Renliang Lyu,Zeqin Li,Cheng Liang,Cheng Zhang,Ting Xia,Ming Wu,Yi Wang,Lichun Wang,Xiaogang Luo,Caili Xu
In this work, due to its excellent adsorption performance, biodegradability, and low toxicity, chitosan was used as the raw material to synthesize a series of new oil-in-water (O/W) type crude oil demulsifiers. First, an acyl group was introduced onto the chitosan molecule. Then, sodium chloroacetate was used as a carboxymethylation reagent to introduce a carboxymethyl group into the acylated chitosan. Furthermore, polyethylene glycol monomethyl ether with an average molecular weight of 1900 (MPEG-1900) was used to react with acylated carboxymethyl chitosan to synthesize chitosan-based O/W type demulsifiers. The molecular structures of the synthetic chitosan derivatives were characterized using Fourier-transform infrared spectroscopy (FTIR) and 1 H nuclear magnetic resonance techniques. The results showed that the surface tension decreased with an increase in the concentration of polysaccharide demulsifiers, which included MPEG-1900-A 4 CMC, MPEG-1900-A 6 CMC, and MPEG-1900-A 8 CMC. The demulsification efficiency of these synthetic demulsifiers reached a maximum over 100 min at a concentration of 200 ppm at 50 °C. The as-synthesized chitosan derivatives showed good demulsification performance.
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DOI
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dan Yu,Jiahong He,Taiping Xie,Qiang Xu,Quanxi Zhu,Jun Yang,Jibin An,Feng Ye,Jiankang Wang,Bin Xiang
It is of significant to explore activation mechanism of peroxymonosulfate (PMS) for development of more active and robust metal oxide catalyst. Here, we discover a key role of Sr-O bond in boosting the catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 perovskite. In this catalytic system, oxygen vacancy, Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles synergistically enhanced catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 for antibiotic degradation with 100 % Florfenicol (FF) removal in 27 min. Moreover, this catalyst presented excellent stability although oxygen vacancy had a decrease after reuse. The influential factors including coexisting anions on FF degradation were systematically studied. Comparative experiments and theoretical calculation indicate Sr-O ionic bond provides electrons for Co-O and Fe-O covalent bonds to accelerate Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles for PMS activation . Finally, the FF degradation pathway over SrCoFe perovskite/PMS system was identified by LC-MS/MS.
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Cen Zhang,Yang Li,Peng Wang,Jiawen Li,Jochen Weiss,Hui Zhang
Core-shell nanofibers were prepared by electrospinning of corn oil-in-water emulsions stabilized by electrostatic gelatin-gum arabic complexes as a mixed monolayer. The addition of gum arabic decreased the apparent viscosity and induced a transition from a shear-thinning to a more Newtonian-like flow behavior of the emulsions, which helped form electrospun fibers with straight, bead-in-string, and spindle-like morphologies. These fibers had a high thermal decomposition stability upon heating to 250 ° C, which was attributed to electrostatic interactions and newly formed hydrogen bonds between gelatin and gum arabic. The encapsulation efficiency of corn oil in fibrous mats at various mixing ratios was over 84%, and showed no significant changes during 7 days of storage. This work thus gives an insight into the development of electrospun nanofibers as encapsulation matrices using monolayer emulsions stabilized by electrostatic protein-polysaccharide complexes for applications in the food, pharmaceutical or personal care industries.
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高影响因子
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Xingzhong Zhang,Xiaogang Luo,Yixiang Wang,Yan Li,Bin Li,Shilin Liu
In this work, concentrated Pickering emulsions had been prepared by using soybean protein isolate (SPI) and TEMPO-oxidized bacterial cellulose (TOBC) complex as solid stabilizers. The effects of solid particle content, pH and oil phase volume fraction on the morphology, stability and rheological behaviors of the emulsions had been investigated. It indicated that the emulsion droplets had uniform particle size distribution when the ratio of SPI/TOBC was controlled to 12.5:1 (wt/wt). The emulsification performance could be improved with the increase of solid complex particles content from 1.0% to 3.0%. Moreover, the pH played an important role in regulating the structure and properties of the emulsions. With microscopic observation, the emulsions at pH 7.0 had smaller droplet size (10–15 μm) than that (15–40 μm) of the emulsions at pH 3.0. While the emulsions at pH 3.0 maintained a low creaming index (CI) value than those at pH 7.0, and uniform cellular network structure could be seen by SEM observation. It suggested that the electrostatic complexation between soy proteins and anionic bacterial cellulose nanofibrils at pH 3.0 was more favorable for stabilizing emulsions than those at pH 7.0. This work would provide some guidance for regulating the properties of emulsions that stabilized by soy protein and cellulose nanofibrils.
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DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2025
·
IF 5.5
Xianshu Dong,Tianshun Dong,Jingkun Li,Yanfei Jiang,Binguo Fu,Guolu Li
To improve the wear resistance of Al 30Si coatings, nano-Y₂O₃-reinforced Al 30Si (Y₂O₃/Al-30Si) coatings were fabricated on 6063 aluminum alloy substrates by atmospheric plasma spraying (APS). The effect of nano-Y 2 O 3 addition on the coating was studied in detail. The results show that nano-Y₂O₃ reduced the porosity of the Al 30Si coatings from 8.2 % to 3.1 %. Nano-Y₂O₃ can provide heterogeneous nucleation sites for primary silicon (β-Si) phases, enabling the Y₂O₃/Al-30Si coating to achieve a 57.4 % reduction in β-Si phase size. Correspondingly, the microhardness, elastic modulus and fracture toughness of the coating increased by 11.0 %, 11.2 % and 48.9 %, respectively. Under the present test conditions, the Y₂O₃/Al-30Si coating exhibited a lower coefficient of friction and a 27.2 % reduction in wear volume. Both the Y₂O₃/Al-30Si and Al 30Si coatings exhibited abrasive, oxidative, and fatigue wear mechanisms.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Mingli Yue,Bixian Wang,Jianbo Zhao,Liangzhong Lv,Ying Fu,Fei Ye
Cancer, the world’s second leading killer, has increasing crude incidence rates and faces multiple prevention/control challenges. Curcumin (Cur) has anticancer activity but low bioavailability, restricting its use in cancer therapy. A nanomaterial (Fe₃O₄/PDA@Cur) for targeted curcumin delivery is developed in this work, which has a magnetic Fe 3 O 4 core made by solvothermal synthesis and a polydopamine (PDA) shell made by one-pot synthesis. Results show that drug loading rate reached 40.3 % when the mass ratio of Fe₃O₄/PDA: Cur was 1:3. The hemolysis rate was measured to be 1.24 % in the hemocompatibility test. The complex exhibited good antibacterial efficacy against both Staphylococcus aureus ( S. aureus , MIC 250.0 μg/mL and MBC 500.0 μg/mL), Escherichia coli ( E. coli , MIC 625.0 μg/mL and MBC 1250.0 μg/mL), which was attributed to the properties of the incorporated PDA. The material has good blood compatibility and antibacterial effects, and it effectively prevents secondary infection at the tumor site and red-blood-cell lysis. Notably, at pH 5.0, drug release reached 75.5 % via pH-responsive mechanisms which tumor microenvironment (pH 5.0–6.5), drug release is accelerated in these regions, enabling targeted therapy that minimizes toxicity to normal cells and systemic side effects, thereby enhancing treatment safety. This complex, which possesses both drug delivery and antibacterial properties, holds significant clinical importance for preventing opportunistic infections during tumor treatment.
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Zidan Zou,Zhuoya Chai,Jia Zhang,Chun Chen,Yunxia Zhang,Haimin Zhang,Huijun Zhao,Guozhong Wang
Developing efficient catalysts for selective C═O hydrogenation remains challenging due to the thermodynamic preference for C═C bond activation in α,β-unsaturated aldehydes. To address this limitation, we engineered Pt1Co10 nanoalloys within ethylenediamine-functionalized mesoporous silica (MS) by marrying vacuum-assisted impregnation with spatially constrained self-assembly. This dual spatial–temporal control strategy can achieve precise charge redistribution at metal interfaces, geometric confinement suppressing Ostwald ripening, and optimal hydrogenation pathways via hierarchical porosity. Under industry-feasible conditions (25 °C, 0.5 MPa H2), the Pt1Co10/MS system delivers 96.8% cinnamaldehyde conversion with 72.1% cinnamyl alcohol yield, outperforming conventional Pt or Co catalysts. More importantly, the MS framework’s strain accommodation capability enables activity retention over the cycle test, and the electronic synergy between Pt and Co can optimize adsorption energetics to suppress competitive C═C hydrogenation pathways. This work establishes an approach of bimetal synergy for steering adsorbed intermediate configurations, offering universal strategies for selective hydrogenation catalysis.
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产品关联
DOI
高影响因子
Frontiers in Nutrition
·
2025
·
IF 5.1
Sixuan Wang,Luorui Li,Qing Meng,Wei Luo,Fang Wei,Liyong Luo,Liang Zeng
Congou black tea has garnered significant interest among customers because of its distinctive floral-fruity aroma. To determine the differences in characteristic volatile compounds among various varieties, a total of 147 volatile compounds were identified across 25 samples via gas chromatography–mass spectrometry (GC-MS). Through hierarchical clustering analysis (HCA), 25 samples were classified into two clusters, in which the Fuding variety, Jinguanyin variety, Huangguanyin variety, and Meizhan variety were clustered into one category, whereas the Sichuan population variety was clustered into the other. These two categories were further analyzed via orthogonal partial least squares discriminant analysis (OPLS-DA), and 48 differential compounds were identified. The Sichuan population variety was found to contain a higher concentration of floral and fruity aroma compounds while exhibiting fewer green or grassy odor compounds. To explore the floral-fruity aroma components of Sichuan Congou black tea (SCBT), forty-nine aroma-active compounds were identified through multidimensional GC–MS/olfactometry (MDGC-MS/O). Among them, six components with odor activity values (OAVs) ≥1 were regarded as key floral-fruity aroma components. Recombination and omission tests ranked the contributions of these compounds as follows: geraniol, linalool, methyl salicylate, benzeneacetaldehyde, beta-myrcene and benzaldehyde. Addition experiments confirmed for the first time that linalool, beta-myrcene and methyl salicylate are the key citrus-like compounds, offering valuable insights for the exploration of germplasm resources and quality control of black tea with special aromas.
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）