JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2025
·Vol. 40
·期 4
·946-952
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IF 1.1
Guo Jiahua,Wei Tao,Huagn Zhixiong,Deng Zongyi,Shi Minxian
We aimed to enhance the flame retardancy of epoxy resin (EP) by synthesizing a novel, halogen-free flame retardant through a one-pot method. The synthesis utilized 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), furfurylamine (FA), and benzene propionaldehyde (BPA) as raw materials. We conducted differential scanning calorimetry (DSC) analysis to investigate the effects of FPD on the curing process and thermal properties of EP. Our findings reveal that incorporating FPD into EP can facilitate a faster curing process and increase the carbon residue post-combustion. Specifically, the FPD/EP-7 composite demonstrates a limiting oxygen index (LOI) of 34.9% and achieves a UL-94V-0 rating with a phosphorus content of 0.91wt%. These results indicate that FPD significantly enhances the thermal stability and charring rate of EP, thereby improving its flame retardancy. Although the addition of FPD slightly reduces the mechanical properties of EP, the composite material maintains excellent performance.
研究领域:
材料科学
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高分子科学
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消防安全工程
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化学合成
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DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yangyi Wu,Lijun Fan,Yixiang Chen,Xianhong Zhang,Dong Chen,Wantai Yang
In this work, a series of nonmigrating polymeric plasticizers with a branched structure, poly(vinyl chloride-co-hydroxyethyl acrylate)-g-polycaprolactone (PVC-co-PHEA-g-PCL), were fabricated by the sequential precipitation copolymerization and ring-opening polymerization (ROP). Initially, the precipitation copolymerization of vinyl chloride monomer with hydroxyethyl acrylate was conducted in a nonaqueous reaction medium by controlling the monomer feed ratio via semibatch to synthesize poly(vinyl chloride-co-hydroxyethyl acrylate) (PVC-co-PHEA) copolymers. The gel permeation chromatography and nuclear magnetic resonance spectroscopy (H NMR) demonstrated that the synthesized PVC-co-PHEA copolymers had low number-average molecular weight (Mn, 8000–12,000 g/mol) and possessed uniform polymer composition (wHEA = 2.9%, 7.0%, and 12.0%). Subsequently, utilizing the hydroxy side-group of the PVC-co-PHEA copolymer as the incipient macroinitiator for the ROP of ε-caprolactone to form a series of PVC-co-PHEA-g-PCLs with different grafting densities and side-chain lengths. Characterization by 1H NMR spectra, wide-angle X-ray diffraction, dynamic mechanical analysis, and differential scanning calorimetry indicated the successful preparation of PVC-co-PHEA-g-PCLs with a branched structure and their suitability as permanent plasticizers in the PVC matrix. The enhancement in both the mechanical strength and superior migration resistance highly verified the strong chain entanglement between PVC-co-PHEA-g-PCLs with the PVC matrix in comparison to the pure dioctyl phthalate (DEHP) and PCL-3000. Moreover, these PVC-co-PHEA-g-PCLs also exhibited outstanding compatibility with the PVC matrix and resulted in the PVC blend with excellent transmittance.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2024
·
IF 6.5
Liwei Wang,Yanfu Ma,Haitao Li,Wenhao Luo,Jian Liu
In supported metal catalysts, solid support material is of great importance for immobilizing and dispersing metal species, which can affect the catalytic performance of supported metal catalysts in terms of selectivity. Rational design of supported metal catalysts with tailored performance, in particular with controlled catalytic performance, is highly desired yet poses challenges in chemoselective hydrogenation reactions. Here, platinum nanoparticles (Pt NPs) supported on a series of commercial oxides were synthesized by a facile wet impregnation and thermal treatment under the air. The catalytic performance of as-prepared catalysts was evaluated in chemoselective hydrogenation of cinnamaldehyde. The varied product distribution demonstrates that supports affect markedly on selectivity. Fourier transform infrared spectra (FTIR) spectroscopy reveals that the high selectivity towards cinnamyl alcohol could be attributed to the preferential adsorption of aldehyde group. Meanwhile, the existence of Pt δ+ could enhance activity markedly by facilitating the spillover of activated H species.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Bin Chen,Jun Hu,Zhihao Yu,Lin Zhu,Chunzheng Wu,Hongbo Yu
Improving catalytic hydrogenation by modifying noble metal catalysts with metal-oxide promoters is promising, but precisely controlling the metal–promoter interface to optimize performance is still challenging. In this study, we created Ir-SnO2/SiO2 nanocatalysts with different Ir/Sn ratios using IrSn alloy precursors through careful calcination and reduction treatments. The SnO2-promoted catalysts showed much better conversion and selectivity than the original Ir/SiO2 catalyst toward the hydrogenation of acetophenone to phenylethanol. The Ir-SnO2/SiO2 catalyst with an Ir/Sn molar ratio of 5/1 (i.e., sample Ir5-(SnO2)1/SiO2) performed the best, achieving a 94% conversion rate and 99% selectivity. Our study found that SnO2 promoters could reduce the surface electron density of the Ir nanoparticles (NPs), enhancing the adsorption of reactants; meanwhile, the new Ir-SnO2 interface is more active for the dissociation of hydrogen compared to Ir alone. The optimal Ir5-(SnO2)1/SiO2 catalyst has demonstrated versatility by effectively catalyzing the hydrogenation of C═O bonds in a wide range of compounds, showing significant potential for various industrial applications in fine chemical synthesis and energy conversion.
研究领域:
催化化学
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材料科学
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工业化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2025
·
IF 9.8
Jialu Zhang,Yu Fu,Peng Chen,Bowen Liu,Cuiling Ren
Salicylaldehyde is a significant fine chemical product utilized in the flavoring of various foods, excessive intake of salicylaldehyde is detrimental to human health. Its accurate quantitative detection holds considerable importance. Compared with “turn-off” probes, the “turn-on”one allow for more sensitive detection. New silicon nanoparticles (D-SiNPs) which can be used to detect salicylaldehyde by “turn-on” mode were prepared in this work. This D-SiNPs demonstrates highly stability, selectivity and sensitivity. Within the concentration range of 5–50 μM, salicylaldehyde concentration exhibits a strong linear relationship with fluorescence intensity, the limit of detection is calculated to be 0.97 μM. It can be applied to detect salicylaldehyde in baked goods and beverages, achieving good recoveries. These results are highly satisfactory. The detect mechanism was investigated systemetically, the results illustrates this detection is based on Schiff reaction between the amino groups of silicon nanoparticles and aldehyde group of salicylaldehyde, which satisfies the ESIPT mechanism.
研究领域:
分析化学
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食品科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
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2025
·
IF 4.2
Yifan Zhang,Jiaying Liu,Shiwei Wang,Zhihao Yu,Haojian Zhang,Dong Wang,Lin Zhu,Chunzheng Wu,Hongbo Yu
Modifying noble metal catalysts with transition metal oxides (MO x ) can markedly enhance catalytic performance through synergistic effects, yet precise spatial colocalization of active metal and promoter phases remains challenging. Here, we report the synthesis of KIT-6 supported Pd-MO x (M = Fe, Co, Ni) hybrid nanostructures via in situ transformation of bimetallic PdM nanoparticles under controlled thermal conditions. The resulting Pd-MO x /KIT-6 catalysts displayed superior activity and selectivity in the selective hydrogenation of acetophenone to 1-phenylethanol compared with monometallic Pd/KIT-6. Among them, Pd-CoO x /KIT-6 (Pd/Co=1:1) achieved the highest performance, with 99.7% acetophenone conversion and 98.2% selectivity, and demonstrated broad applicability for hydrogenating diverse ketones. Structural and kinetic studies revealed that interfacial Pd-CoO x sites play a pivotal role: Pd domains efficiently dissociate H 2 , while CoO x species enhance acetophenone adsorption. This synergistic interface-driven mechanism provides a general and costeffective strategy for the selective hydrogenation of multifunctional substrates.
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DOI
高影响因子
Molecular Catalysis
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2024
·
IF 3.9
Xing Gao,Ying Ma,Yingying Ruan,Wenna Zhang,Shihao Zhang,Wenxue Xiong,Dong Tian,Shiliu Yang,Pei Fan,Yanhui Yang,Yihu Dai
Non-noble metal-catalyzed selective C O hydrogenation of α,β-unsaturated aldehydes to corresponding alcohols is chemically atom economic and practically feasible. This work reports hydrotalcite-derived Co-based catalysts for catalyzing aqueous phase selective hydrogenation reaction of cinnamaldehyde to cinnamyl alcohol. The structure characterizations demonstrate the phase transition from hydrotalcite to co-existed CoO x and metallic Co 0 in the optimal Co 2 Al-H 2 -400 catalyst. It exhibits superior catalytic activity and selectivity relative to other as-obtained Co catalysts, because of the synergy effect of Co 2+ sites to promote the adsorptive activation of C O group and small-size Co 0 sites to facilitate the activating dissociation of hydrogen. Furthermore, the catalytic role of water has also been explored. Adopting water as pure solvent and partially adding water into organic solvent can both effectively enhance the activity and selectivity. Such reaction environment may induce creation of more intermolecular hydrogen bonds for promoting the hydrogen transfer and thus boosting the hydrogenation reaction.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Zhang Tianhao,Tian Yuan,Zhang Chong,Yan Tingting,Yan Hanwen,Zhang Guoliang,Li Jie,Li Zengxi,Wang Gang,Li Chunshan,Zhang Suojiang
Electronic properties of active sites profoundly influence catalytic production of value-added chemicals; however, rational description and modulation is still a significant challenge. Herein, we propose an effective metal-ion-chelation strategy guided by density functional theory prediction and in situ Raman observation to structurally tailor and quantitatively correlate the electronic properties of active sites in ionic liquid. Comprehensive characterizations and theoretical calculations, in combination with electronic properties–performance correlations, reveal the electronic peculiarity of nitrogen and oxygen centers can be controllably restructured for remarkable improvement of catalytic performance at near-ambient condition. The turnover frequency is increased by two folds with deactivation rate suppressed by more than one half, while the kilogram-scaled recycling pilot achieves similar performance for the probe methacrolein synthesis. This strategy further exhibits excellent applicability and tolerance in other substrates with representative functional groups. Our work expresses the significance of electronic properties and provides a valid regulation approach for ionic liquid catalysis.
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产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 17
·4732-4747
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IF 9.405
Shenghui Zhou,Fanglin Dai,Chao Dang,Ming Wang,Detao Liu,Fachuang Lu,Haisong Qi
Exploring both high-performance catalytic materials from non-edible lignocellulosic biomass and selective hydrodeoxygenation of bioderived molecules will enable value-added utilization of renewable feedstocks to replace rapidly diminishing fossil resources. Herein, we developed a scale-up and sustainable method to fabricate gram-quantities of highly dispersed cobalt nanocatalysts sheathed in multilayered N-doped graphene (Co@NG) by using a biomacromolecule carboxymethyl cellulose (CMC) as a raw material. The ionic gelation of CMC, urea and Co2+ ions leads to uniform dispersion and chelation of different species, consequently resulting in the formation of highly distributed Co nanoparticles (NPs) (10.91 nm) with N-enriched graphene shells in the solid-state thermolysis process. The usage of urea as a non-corrosive activation agent can introduce a porous belt-like nanostructure and abundant doped nitrogen. Among all the prepared catalysts in this work, the optimized Co@NG-6 with the largest specific surface area (627 m2 g−1), the most and strongest basic sites, and the highest proportion of pyridinic-N (37.6%) and mesopores exhibited excellent catalytic activity (99% yield of 2-methoxy-p-cresol) for base-free transfer hydrodeoxygenation (THD) of vanillin using bioderived formic acid (FA) as a H source at 160 °C for 6 h. The poisoning tests and electron paramagnetic resonance (EPR) spectra verified that the strong interaction between N atoms and encapsulated Co NPs provided synergistic effects, which were essential for the outstanding catalytic performance of Co@NG-6. The deuterium kinetic isotope effect study clearly demonstrated that the formation of Co-H−via β-hydride elimination and protonation was the rate-determining step, and protic N–H+ and hydridic Co-H− were considered to be active intermediate species in the THD reaction. Furthermore, Co@NG-6 was highly stable for recycling owing to the graphene shells preventing Co NPs from corrosion and aggregation.
研究领域:
材料科学
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催化化学
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可再生资源利用
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 5
·3168-3182
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IF 4.682
Tian Fuping,Zhang Mengjie,Zhang Xinchi,Chen Xiao,Wang Jinliang,Zhang Yifu,Meng Changgong,Liang Changhai
Hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) or hydrocinnamaldehyde (HCAL) with high selectivity has important industrial value. Previous studies have shown that nickel-based catalysts are highly active and favor the selectivity to HCAL. However, Ni in metallic state is so active that most of nickel-based catalysts need to be pre-reduced before use. In this paper, a stable Ni–C catalyst was prepared by simple pyrolysis of Ni-BTC and systematically characterized. The results showed that metallic Ni nanoparticles were uniformly dispersed and encapsulated in the carbon layer, which protects the metallic Ni from oxidation. Therefore, the Ni–C catalyst can be directly used in CAL hydrogenation without pre-reduction. The catalyst Ni-C-600 achieved 92.5% selectivity to HCAL at 96.2% conversion of CAL at 120 °C under 2 MPa H 2 for 6 h with a poor reusability in isopropanol (IPA), while the catalytic performance and reusability were evidently enhanced (HCAL selectivity ~ 94%, CAL conversion ~ 99% in five consecutive runs for 4 h) in a solvent containing water and IPA. This study provides a facile and low-cost method to prepare effective Ni-based catalysts displaying excellent catalytic activity with high HCAL selectivity and stable reusability in CAL hydrogenation. Graphical abstract
研究领域:
催化化学
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材料科学
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DOI
高影响因子
MOLECULAR NUTRITION & FOOD RESEARCH
·
2022
·Vol. 66
·期 11
·2100963
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IF 6.575
Xiaoyao Ma,Kaixin Liu,Yiman Han,Yongping Bai,Fukui Shen,Mukuo Wang,Wei Wei,Jianfeng Qin,Erwei Hao,Xiaotao Hou,Yuanyuan Hou,Gang Bai
Scope Glutamate (Glu) and γ-aminobutyric acid (GABA) are the major excitatory and inhibitory neurotransmitters that control information flow in the brain. GABA dysfunction is a general vulnerability factor for mental illness. Cinnamaldehyde (CA) is found to have sedation in a mental illness model. However, the specific targets and molecular mechanisms related to the sedative effects of CA have not been elucidated. Methods and Results Metabolomics analysis and target fishing showed CA could increase the expression of GABA in vivo, and α-enolase (ENO1) is the primary target protein of CA associated with sedation. CA mainly binds with ENO1 in the cerebellar granular layer of brain, which influences the first transformations of the input signals arriving in the cerebellar cortex. The α,β-unsaturated aldehyde group of CA blocks the hydroxy group of Ser40, which induces a loss in ENO1 activation. CA also disturbs the glycolysis pathway and influences the tricarboxylic acid cycle and oxidative phosphorylation, which activate gluconeogenesis to provide energy to the brain. This mechanism is verified in zebrafish with ENO1 or glutamic acid decarboxylase (GAD) deficiency. Conclusions CA demonstrates sedation and alleviates GABA dysfunction via covalent binding ENO1, which shows the potential to improve the therapy of mental illness.
研究领域:
神经科学
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药理学
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分子生物学
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生物化学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Yangyang Zhou,Chen Chen,Qiling Li,Yanbo Liu,Ting Wei,Youzhen Liu,Zebing Zeng,Darren Bradshaw,Bing Zhang,Jia Huo
Hydrogenation of unsaturated biomass in a control manner is highly desirable but challenging, especially under mild conditions. We here report selective hydrogenation of α,β-unsaturated aldehydes (UALs), featuring a precise control of all potential products by adjustment of the role of ammonia borane (AB) in transfer and/or catalytic hydrogenation. The hydrogenation can be readily operated in neat water without using any external H 2 -source, because AB as the H 2 -source is favorable in aqueous solution. Impressively, unsaturated alcohols are prepared in 100% conversion by the room-temperature transfer hydrogenation of UALs with AB, while saturated aldehydes are obtained in 100% conversion and > 90% selectivity with high activity ( i.e ., turnover frequency = 0.98 s −1 for cinnamaldehyde), by the catalytic hydrogenation with H 2 released from AB and Pd immobilized on two-dimensional metal organic layer. On the other hand, UALs can be completely converted into the saturated alcohols through a combination of transfer and catalytic hydrogenation in one pot. This strategy can be extended to more than 8 types of UALs, and provides a facile way to fine-control the selective hydrogenation of unsaturated compounds with competing bonds.
研究领域:
化学
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生物质能
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催化科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）