JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Qian Wang,Chensheng Lin,Guohong Zou,Mengjiao Liu,Daojiang Gao,Jian Bi,Ling Huang
A new noncentrosymmetric material, namely, K 2 [B 3 O 3 (OH) 5 ] has been obtained by conventional solution reaction. It crystallizes in the orthorhombic space group Ama 2 (no. 40). In the structure of K 2 [B 3 O 3 (OH) 5 ], the BO 2 (OH) triangles and BO 2 (OH) 2 tetrahedra are linked via sharing corners forming the isolated [B 3 O 3 (OH) 5 ] 2- anionic groups with no dangling bonds in oxygen atoms. And K 2 [B 3 O 3 (OH) 5 ] is the first synthetic noncentrosymmetric borates with [B 3 O 3 (OH) 5 ] 2- anionic groups. Powder second-harmonic generation (SHG) using the Kurtz−Perry technique showed that K 2 [B 3 O 3 (OH) 5 ] is type I phase-matchable, and the measured SHG coefficient is 0.32 times that of KH 2 PO 4 . The UV transmittance spectroscopy measurement indicated that the UV absorption edge was below 200 nm, suggesting that K 2 [B 3 O 3 (OH) 5 ] might be a promising deep-UV nonlinear optical material. Band structure and optical property calculations based on DFT methods were also performed.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Mingfu Li,Shuanglan Hu,Yingchuan Zhang,Jiannan Qin,Douyong Min,Chunlin Chen,Pingjun Zhang,Liqun Jiang,Jian Zhang
The green oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is a crucial step in the development of sustainable and degradable plastics. Here, a series of MnCO 3 -Mn x Co 3-x O 4 -Ov composite oxides are synthesized by a simple solid-state grinding and carbonization method, exhibiting a 100 % HMF conversion rate and 98.7 % FDCA yield directly using air as the oxygen source. Physicochemical characterizations indicate that the introduced carbon promotes the diffusion of Mn species and reduction of Co 3 + /Co 4+ , resulting in more unsaturated coordination of Co–O and the enhanced formation of oxygen vacancies (O v ). The kinetic analysis suggests that the oxidation of HMF to FDCA can be effectively promoted by regulating the O v content in the catalyst after changing the Mn/Co ratio. Moreover, density functional theory (DFT) calculations demonstrate the crucial role of O v in reducing the adsorption energy of HMF on the catalyst surface and activation of O 2 molecules to replenish lattice oxygens during the completion of the catalytic cycle. This work provides a promising strategy to engineer transition metals as alternatives to noble metal-based catalysts towards catalytic oxidation for the production of biofuels and bioplastics.
研究领域:
化学工程
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催化材料
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Lei Hu,Ning Li,Xiaoli Dai,Yuqi Guo,Yetao Jiang,Aiyong He,Jiaxing Xu
The development of high-efficiency and low-cost catalysts is very crucial for the Meerwein-Ponndorf-Verley (MPV) reduction of biomass-derived 5-hydroxymethylfurfural (HMF) into 2,5-dihydroxymethylfuran (DHMF). In this work, an amorphous and mesoporous zirconium phosphonate catalyst (Zr-DTMP), which is a zirconium-containing organic-inorganic nanohybrid , was successfully designed and synthesized by the simple assembly of zirconium tetrachloride (ZrCl 4 ) and diethylene triaminepenta(methylene phosphonic acid) (DTMP). Satisfactorily, when Zr-DTMP was employed for the MPV reduction of HMF in the presence of 2-butanol ( sec BuOH), DHMF yield could be achieved as 96.5% in 3 h under a relatively mild reaction temperature of 140 °C. Systematic investigations indicated that this high catalytic activity should be mainly due to the cooperative role of enhancive Lewis acid site (Zr 4+ ) and Lewis base site (O 2− ) in activating the carbonyl group of HMF and dissociating the hydroxyl group of sec BuOH, respectively. Additionally, Zr-DTMP showed excellent catalytic stability, when it was successively used 5 recycles, its surface characteristics and textural properties still remained almost unchanged, and so, the catalytic activity was not obviously affected. More interestingly, Zr-DTMP could also be applied for the selective reduction of other biomass-derived carbonyl compounds , such as 5-methylfurfural (MF), furfural (FF), levulinic acid (LA), ethyl levulinate (EL) and cyclohexanone (CHN), into the corresponding products with high yields, which is beneficial to the effective synthesis of various valuable bio-based chemicals.
研究领域:
化学工程
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可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2013
·Vol. 3
·期 8
·2104-2112
·
IF 3.753
Shuguo Wang,Zehui Zhang,Bing Liu,Jinlin Li
In this study, a magnetically-recoverable catalyst (Fe3O4@SiO2-HPW) was prepared by the application of phosphotungstic acid (HPW) supported on silica-coated Fe3O4 nanoparticles. The prepared samples were characterized by XRD, TEM, FT-IR, and N2-adsorption–desorption isotherms. The content of W in Fe3O4@SiO2-HPW was measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES) and its surface acidity was determined by a potentiometric titration with n-butylamine. Fe3O4@SiO2-HPW showed an excellent catalytic activity for the synthesis of EMF from HMF and fructose. Under optimal reaction conditions, EMF was obtained in a high yield of 83.6% by the etherification of 5-hydroxymethylfurfural. EMF could also be synthesized directly from fructose in a yield of 54.8% via a one-pot reaction strategy. After reaction, the catalyst Fe3O4@SiO2-HPW could be easily separated from the reaction mixture with an external magnetic field, and it could be reused at least five times without any loss of its catalytic activity.
研究领域:
化学
·
催化材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Lifang Gao,Zhenbang Liu,Jinling Ma,Lijie Zhong,Zhongqian Song,Jianan Xu,Shiyu Gan,Dongxue Han,Li Niu
A key challenge for the conversion of 5-hydroxymethylfurfural (HMF) into value-added 2,5-furandicarboxylic acid (FDCA) is improving the sluggish kinetics of selective oxidation alcohol groups. Electrocatalysis has been proved to be a green and efficient strategy for heterogeneous synthetic chemistry. Herein, we report an electrocatalyst of NiSe@NiO x core-shell nanowires for efficiently upgrading HMF into FDCA. The NiSe@NiO x features conductive NiSe nanowires as a core and active NiO x as a shell, showing a smaller Tafel slope of 23 mV dec −1 accompanying with a near-quantitative yield of FDCA and 99% Faradaic efficiency (FE). X-ray photoelectron spectroscopy unveils the high valence of Ni species in the NiO x shell may be the active sites. Further integrated electrolyzer can produce FDCA and hydrogen simultaneously, showing a 100% FE even after six successive cycles, disclosing robust stability. All these results demonstrate NiSe@NiO x core-shell nanowires as a promising robust non-precious electrocatalyst for highly efficient biomass transformation.
研究领域:
化学工程
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材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2025
·Vol. 367
·期 17
·e70093
·
IF 4
Anirban Chowdhury,Akkammagari Putta Rangappa,Wenhua Xue,Yixuan Liu,Jun Zhao
The photocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) is a promising process with significant implications for sustainable energy and environmental applications. However, achieving highly selective DFF production from HMF remains a challenging task, particularly due to the dependency of molecular O 2 activation on the composition and exposed facets of nanomaterials. This study investigates the impact of different preferential facets of hydrothermally synthesized cadmium sulfide (CdS) morphologies—including hollow spheres, nanorods, and flower-like structures—on the photocatalytic oxidation of HMF to DFF. The findings reveal that the preferential CdS (002) facet and Cd vacancies in the hollow sphere morphology significantly enhance photocatalytic activity, achieving 68% HMF conversion and 89% selectivity for DFF production within 12 h of reaction time. This work highlights the critical role of material composition and facet orientation in optimizing photocatalytic processes for selective oxidation reactions, offering a potential strategy for the design of advanced photocatalysts in sustainable chemical production.
研究领域:
材料化学
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光催化
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可持续能源
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环境催化
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纳米材料
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绿色化学
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分子催化
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Yuying Sui,Jinhui Li,Tao Wang,Deliang Sun,Chao Huang,Fan Zhang,Liang Shan,Fangfang Niu,Guoping Zhang,Rong Sun
Polyimides (PIs) with remarkable mechanical, thermal, dielectric properties have been extensively employed in electronic package of integrated circuit industry. However, PI is imidized at high temperature (>350 °C) traditionally, which limits its application in thin-film transistor and fan-out wafer level package (FOWLP). In this work, active curing catalyst of 5-aminobenzimidazole is introduced in covalent bond to get a low temperature curable polyimide with superior comprehensive properties. The results prove that PI-3 can be imidized completely at 200 °C in 2 h and the imidization index could be as high as 1.03. Besides, the PI films exhibit excellent thermal stability of which the temperature for 5% weight loss is as high as 526 °C and glass transition temperature is 428 °C which is obtained by dynamic mechanical analyzer. Moreover, the tensile test shows the tensile strength of PI-3 is 91 MPa and elongation at break is about 15%. All these results prove the superior performance of the low temperature curing PIs, showing great potentials in the advanced package in the FOWLP and the others.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Zhi Cao,Yin Wang,Chao Liu,Haitao Cao,Zhongfei Han,Tao Shen,Gang Qi
A series of porphyrin-based porous organic polymer-supported Ag nanoparticle, Ag(0)@POP -x were prepared by the reaction pathway of ion coordination followed by hydrogen reduction. The resulting composite Ag(0)@POP -6.52 shows excellent catalytic performance toward the selective oxidation of HMF to HMFCA, and an impressive HMFCA yield of 97.2% (Na 2 CO 3 2 eq, O 2 2.0 MPa 90 min, 100 °C). Analysis techniques such as ICP-OES, XRD, TEM, SEM, N 2 adsorption-desorption, and XPS was employed to characterize the structure and properties of Ag(0)@POP -6.52 . The reaction conditions including the type of base and solvent, base and catalyst dosage, oxygen pressure, reaction temperature and time were studied in detail to improve the yield of HMFCA. Furthermore, the catalytic stability of the Ag(0)@POP -6.52 was evaluated by leaching and reusing tests, the results shows that the catalyst has good stability and robustness structure. Finally, the other aldehydes oxidation over Ag(0)@POP -6.52 was tested for investigation the substrate scope of Ag(0)@POP -6.52 .
研究领域:
化学
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材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Xiangtao Qin,Taotao Qiang,Lu Chen,Shaoting Wang
MOF-5 is an emerging semiconductor material with a great potential in photocatalytic wastewater treatment . However, its inherent deficiencies, such as the narrow range of photo-response, the fast recombination of photoinduced carriers and the unstable structure, largely limit its further application. In this work, super biocompatible N-doped carbon quantum dots (N-CQD) derived from the green precursor, coconut shells, were in situ grown on MOF-5 via a facile solvothermal method to construction of 0D/3D N-CQD/MOF-5 photocatalyst with an enhanced photoreduction ability. A sustainable and pollution-free preparation process of N-CQD/MOF-5 photocatalyst was delivered and biomass waste resource was effectively utilized via this method. This well-designed photocatalyst with the optimized 1% N-CQD loading presented a considerable photoreduction rate of Cr (VI), which was 2.5 times higher that of pure MOF-5. It also possessed a strong structural stability and reusability even after multiple tests. The boosting photocatalysis activity could be attributed to the doping of N-CQD, who not only act as an electron acceptor to separate the photoexcited electrons and holes effectively, but also play a vital role as a photosensitizer to improve the visible-light absorption. Furthermore, the influence of activation methods on the photocatalytic activity of MOF-5 were also investigated theoretically. For the purpose of clarifying the potentially photocatalytic mechanism of N-CQD/MOF-5 in photoreduction Cr (VI), a series of tests involving photoelectrical characterizations and fluorescence spectroscopy were executed. Therefore, this study provides an innovative photocatalytic system for an enhanced photoreduction performance of Cr (VI) of MOF-5.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 98
·期 3
·773-781
·
IF 3.709
Wei Zhang,Zheng Shen,Ling Kong,Wenbo Chen,Minyan Gu,Meng Xia,Wenjie Dong,Yalei Zhang
BACKGROUND The conversion of glucose into 5-hydroxymethylfurfural (5-HMF) involves the isomerization of glucose to fructose catalyzed by Lewis acid and subsequent dehydration of fructose catalyzed by Brönsted acid. In this work, in order to obtain a high yield of 5-HMF, a series of Sn-Al-Beta catalysts containing both Lewis and Brönsted acid sites were prepared by a convenient solid state ion exchange (SSIE) method using partially dealuminated Beta zeolite and tin(II) acetate. RESULTS The obtained bifunctional catalysts were investigated for one-pot production of 5-HMF from glucose in the ionic liquid (IL) [C 4 mim]Cl. Among various catalysts, Sn-Al-Beta- 4 - 8 exhibited the best catalytic performance, giving a 5-HMF yield of 54% under optimal reaction conditions (393 K, 2 h), along with a glucose conversion of 81%. The Sn-Al-Beta- 4-8 catalyst and IL were regenerated by the extraction of 5-HMF, and the reactivity was reserved after five runs of recycling. In addition to glucose, the Sn-Al-Beta- 4-8 /[C 4 mim]Cl system was also proven to have the potential to effectively convert other carbohydrates into 5-HMF. CONCLUSION The results suggested that the catalyst is convenient to prepare and has preferable efficiency and stability in the conversion of carbohydrates into 5-HMF. © 2022 Society of Chemical Industry (SCI).
研究领域:
催化化学
·
生物质转化
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Pharmaceuticals
·
2025
·Vol. 18
·期 3
·426
·
IF 4.8
Zhimin Song,Meijing Li,Ziwei Zhou,Xiaomeng Guo,Qi Wang,Zekuan Zhang,Keshu Wang,Qixiang Zheng,Wenjing Gou,Sha Wu,Hui Zhao,Muxin Gong
Background:Chronic migraine (CM) is a common complex nervous system disease, often accompanied by symptoms of the digestive tract that interact with each other, leading to prolonged and difficult-to-cure migraines. These symptoms are associated with abnormalities in 5-HT and its receptors. Wuzhuyu decoction (WZYD) is a traditional Chinese medicine prescription commonly used in clinics to treat CM; it relieves gastrointestinal symptoms, such as nausea and vomiting; however, its mechanism is still unclear. Investigating the differences in the role of WZYD compared to existing drugs targeting 5-HT receptors in the treatment of CM not only helps elucidate its pathogenesis but also provides possibilities for the development of new therapeutic approaches.Methods:An inflammation soup (IS)-induced CM male rat model was established. Based on a preliminary experiment, the target of WZYD in treating CM was determined by network pharmacology, and verified by molecular docking. ELISA, immunofluorescence, western blot, and real-time quantitative polymerase chain reaction (RT-qPCR) were used to evaluate the expression levels of CM-related indicators (5-HT, calcitonin gene-related peptide (CGRP), and c-Fos) to ensure the successful establishment of the CM model and the effectiveness of the drug. On this basis, the protein expression levels of 5-HT1A/3A receptors and their cAMP-response element binding protein (CREB) signaling pathway were detected by western blot and immunohistochemistry. The role of 5-HT1A/3A receptors in the treatment of CM by WZYD was validated using a 5-HT1A receptor antagonist (WAY 100635) and a 5-HT3A receptor agonist (SR 57227).Results:The results showed that WZYD increased the expression of 5-HT in the brain, decreased the expression of CGRP, c-Fos, ionized calcium-binding adapter molecule 1 (Iba1), and relieved CM. At the same time, WZYD also increased the expression of the 5-HT1A receptor and decreased the expression of the 5-HT3A receptor in the brain and colon of CM rats. Subsequently, WZYD further exerted its brain-gut integrated therapeutic effects by regulating the CREB signaling pathway mediated by 5-HT1A/3A receptors in the brain and colon of CM rats.Conclusions:WZYD not only regulates neurotransmitters in the brain and colon at the same time, but also specifically regulates 5-HT1A/3A receptors in the brain and colon, which explains the characteristics and advantages of WZYD from a new perspective. While effectively relieving headache symptoms, it also improves related gastrointestinal symptoms, which is more conducive to the treatment of CM.
研究领域:
神经科学
·
药理学
·
中医药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Pan Pan,Mingming Li,Yuxin Liu,Yisi Feng,Xinglong Li
2,5-diformylfuran (DFF) is a multifunctional intermediate, which can be used in drugs, functional polymers, fluorescent materials and surfactants. In this paper, a TEMPO-assisted magnetic Fe 3 O 4 @SiO 2 @mSiO 2 -NH 2 -Cu(II) catalytic system was developed for the selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran. The structure of Fe 3 O 4 @SiO 2 @mSiO 2 -NH 2 -Cu(II) was double-layer shell-core spherical structure with uniform ordered mesoporous on the surface, amino groups and Cu were evenly distributed in the outer mesoporous. The catalyst was characterized by FT-IR, TEM, EDS, SEM, XRD, BET and VSM. The effects of reaction conditions were investigated in detail. The conversion of HMF was 98.9% and the highest DFF yield was 92.4% under atmospheric oxygen in toluene solvent. The catalytic activity did not decrease significantly after 5 cycles. The catalytic system had good substrate adaptability for benzyl alcohols and aromatic alcohols with satisfactory yield of corresponding aldehydes (91.3–100%). A possible reaction mechanism was also proposed and found that bis(μ-hydroxy) double copper (II) may be the active reactant in oxidation reaction. The system provides a promising industrialized preparation method for DFF.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）