DALTON TRANSACTIONS
·
2016
·Vol. 46
·期 1
·193-199
·
IF 4.177
Dongdong Xu,Fangfang Zhang,Yanzhou Sun,Zhihua Yang,Binghua Lei,Lili Liu,Shilie Pan
A new rare-earth borate LiRb2LaB2O6 (LB-1) has been synthesized using a high-temperature solution method. Interestingly, it shares its topological structure with the famous porous material MOF-5, which is formed from Zn4O(BDC)3 (BDC = 1,4-benzenedicarboxylate). The nodes [OZn4] and organic linkers [BDC] of MOF-5 are carefully substituted with La3+ rare-earth cations and the inorganic linkers [BO3] and [LiO4], respectively, in order to construct a pure inorganic open framework. LB-1 exhibits good thermal and water stability. Moreover, it possesses a short cut-off edge (<190 nm) and moderate birefringence (exp. 0.040@589.5 nm, cal. 0.038@589.5 nm). Further insights into the cut-off edge were given by first-principles calculations. The factors that influence the birefringence of LB-1 were discussed in view of the spatial arrangement of the [BO3] anionic groups.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 13
·e202200192
·
IF 9.14
Qizhi Hu,Shi Jiang,Yue Wu,Hongzhong Xu,Guoqing Li,Yu Zhou,Jun Wang
Graphical Reductive amination : Highly active and stable alumina-supported carbon-doped Ni nanoparticles are fabricated via a facile one-step pyrolysis-reduction strategy and achieve the reductive amination of 5-hydroxymethylfurfural into primary amine with ammonia and hydrogen at ambient temperature. An efficient catalytic system for the conversion of 5-hydroxymethylfurfural (HMF) into N-containing compounds over low-cost non-noble-metal catalysts is preferable, but it is challenging to reach high conversion and selectivity under mild conditions. Herein, an Al 2 O 3 -supported carbon-doped Ni catalyst was obtained via the direct pyrolysis-reduction of a mixture of Ni 3 (BTC) 2 ⋅ 12H 2 O and Al 2 O 3 , generating stable Ni 0 species due to the presence of carbon residue. A high yield of 96 % was observed in the reductive amination of HMF into 5-hydroxymethyl furfurylamine (HMFA) with ammonia and hydrogen at ambient temperature. The catalyst was recyclable and could be applied to the ambient-temperature synthesis of HMF-based secondary/tertiary amines and other biomass-derived amines from the carbonyl compounds. The significant performance was attributable to the synergistic effect of Ni 0 species and acidic property of the support Al 2 O 3 , which promoted the selective ammonolysis of the imine intermediate while inhibiting the potential side reaction of over-hydrogenation.
研究领域:
催化
·
化学工程
·
材料科学
·
绿色化学
·
可持续化学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 78
·63866-63873
·
IF 3.84
Yujie Qiang,Shengtao Zhang,Shenying Xu,Linliang Yin
The inhibition effect of 5-nitroindazole on the corrosion of copper in a 3.0% NaCl solution was investigated with the methods of weight loss, electrochemical tests, scanning electronic microscopy (SEM) and theoretical calculations. The weight loss and electrochemical results revealed that 5-nitroindazole is a mixed-type inhibitor with the inhibition efficiency is up to 99% at 0.4 mM, which was further confirmed by SEM observation. The adsorption of the inhibitor molecule on the copper surface was found to obey the Langmuir adsorption isotherm. The quantum chemical calculations and molecular dynamics simulation showed that 5-nitroindazole is adsorbed strongly on the copper surface in a parallel mode through the indazole ring.
研究领域:
材料科学
·
腐蚀与防护
·
物理化学
·
表面科学
·
电化学
·
金属材料
·
理论化学
✓ 已验证
DOI
高影响因子
Royal Society Open Science
·
2018
·Vol. 5
·期 4
·
IF 2.504
Donglin He,Huiping Zhang,Ying Yan
Cu-ZSM-5 catalysts were prepared by chemical vapour deposition for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed bed reactor. Firstly, Cu-ZSM-5 catalysts with Cu loading of 0.5, 2, and 6 wt% were prepared and characterized by X-ray diffraction (XRD), N2 adsorption–desorption and X-ray photoelectron spectra (XPS). The characterization results demonstrated that CuO was uniformly dispersed on ZSM-5 with slight effect on the structure properties of the support. Then, several variables, such as the copper loading, reaction temperature, catalyst bed height and feed flow rate were investigated in the CWPO of phenol in aqueous solution at high concentration (1000 ppm). Compared with the catalyst prepared by the impregnation method, the Cu-ZSM-5 prepared by chemical vapour deposition has a better capacity of further oxidizing the intermediate organic products into carbon dioxide and water with less metal loading. Based on the Cu-ZSM-5 catalyst with Cu loading of 6 wt%, complete removal of phenol and a high TOC reduction (around 70%) have been achieved at the temperature of 80°C feed flow rate of 2 ml min−1 and catalyst bed height of 3 cm. Moreover, this catalyst maintained high catalytic activity after three runs with high phenol conversion (94%) under this optimum operating condition. Finally, the reaction mechanism was studied based on the intermediates detected by high-performance liquid chromatography (HPLC).
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Jia Ding,Pengjing Chen,Songyu Fan,Zhiqiang Zhang,Lupeng Han,Guofeng Zhao,Ye Liu,Yong Lu
Free-standing stainless-steel (SS)-fiber@meso-HZSM-5 core–shell catalysts engineered from micro- to macro-scale were highly efficiently synthesized via cost-effective steam-assisted crystallization (SAC) method. Impact of synthesis conditions on their morphology and textural/acidic properties was investigated by means of XRD, SEM, TEM, solid-state NMR, NH3-TPD, Py-IR and N2 physisorption. Single-run lifetime of such structured catalysts for MTP process was strongly dependent on their preparation conditions but slightly the product distribution. A volcano-like relationship for lifetime was observed against the SAC time, which was correlated well with the crystallization-time-dependent crystallinity, mesoporosity and crystal size. The promising SS-fiber@meso-HZSM-5 was the one obtained after the SAC for 12 h, which delivered a prolonged single-run lifetime of 620 h with a high propylene selectivity of ∼42% at 450 °C using a methanol weight hourly space velocity (WHSV) of 1 h–1, as the result of high crystallinity, well-developed mesoporosity and small crystal size. Note that well-developed mesoporosity was paramount for the catalyst stability improvement, because of enhanced accommodation capacity of zeolite shell for receiving formed coke.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yameng Wan,Haixia He,Pengshuai Zhang,Zibo Huang,Rui Zhao,Jiao Sha,Tao Li,Baozeng Ren
Solubility of cis-5-norbornene-endo-2,3-dicarboxylic anhydride (carbic anhydride) in fourteen pure solvents including methyl acetate (MAC), ethyl acetate (EAC), n-propyl acetate (NPAC), isopropyl acetate (IPAC), n-butyl acetate (NBAC), n-amyl acetate (NAAC), isoamyl acetate (IAAC), hexyl acetate (HAC), octyl acetate (OAC), ethanol (EtOH), 1,4-dioxane, 1-methyl-2-pyrrolidinone (NMP), acetone, N , N -dimethylformamide (DMF) and three binary solvents of (DMF + EtOH), (1,4-dioxane + EtOH) and (EtAC + EtOH) with various mass fractions was experimentally studied at various temperatures under 0.1 MPa. The results showed that solubility of carbic anhydride increased with the increasing temperature in all pure/binary solvents and decreased with the increasing mass fractions of ethanol in binary solvents. The Hansen solubility parameter was used for explaining the solubility order of carbic anhydride in selected solvents. Solubility of carbic anhydride in pure solvents was correlated by van't Hoff equation, modified Apelblat equation, and λh equation. Experimental solubility of carbic anhydride in binary solvents was correlated by Jouyban-Acree model, Jouyban-Acree-modified Apelblat model, Jouyban-Acree-van't Hoff model, Sun model and Ma model. Moreover, thermodynamic properties of solutions were calculated by the van't Hoff analysis. The dissolution process was always endothermal and entropy-driven.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yitao Zhao,Junjun Cheng,Peng Zhang,Xinhui Liu,Jianguo Zhuang,Yijun Yu,Qichao Zhao,Yuchen Wang,Xuedong Zhu,Fan Yang
Alkylation of benzene with carbon dioxide (CO 2 ) is significant for converting greenhouse gas and surplus benzene into value-added toluene and xylene. Herein, a bifunctional catalyst comprising Zn/Ga oxides and HZSM-5 zeolite was developed to efficiently promote the methylation of benzene with CO 2 and H 2 . This catalytic system exhibited excellent performance at 425 ℃ and 3.0 MPa, through which benzene conversion of 39.1% and total xylene/toluene selectivity of 92.7% have been achieved. Furthermore, the catalysts are carefully characterized; compositions of Zn/Ga oxides and Si/Al ratios of HZSM-5 zeolite are recognized as decisive factors for reaction activity and selectivity respectively. Additionally, primary reaction pathways are explored and testified to provide detailed understanding for the establishment of reaction networks, especially for mechanisms of ethylbenzene evolution. These findings are able to provide more deep insights into the process of benzene alkylation, which further facilitates the emergence of effective catalysts with potential industrial applications.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 18
·期 1
·5
·
IF 36.3
Huang Rulu,Liu Chao,Zhang Kaili,Jiang Jianchun,Tian Ziqi,Chai Yongming,Wang Kui
A porous carbon-supported Ni-ZnO nanoparticles catalyst (Ni-ZnO/AC) was synthesized by low-temperature coprecipitation, demonstrating exceptional catalytic activity and stability.
Selective hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)furan (97.5%) or 2,5-dimethylfuran (99.5%) is achieved over Ni-ZnO/AC catalyst by solvent-tuning.
Solvent-catalyst interaction jointly regulates hydrodeoxygenation behavior in HMF hydrogenation by modulating rate and pathway via a hydrogen shuttle mechanism.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Jian Zhao,Chao Li,Xiaodong Fan,Hao Liu,Ziqi Liu,Jingchao Zhang,Zhizhong Sun,Wenyi Chu
A series of Brønsted-Lewis acidic tetraimidazolyl ionic liquids ( [TeimILs] ) were designed and synthesized by introducing Brønsted acid (-SO 3 H) in the cation and Lewis acid (AlCl 3 ) in the anion. Among them, [Teim - PS][AlCl 4 ] 4 exhibited good catalytic performance in the conversion of glucose to 5-HMF in the biphasic system of H 2 O: 1-octanol= 1:2, and the conversion of glucose and the yield of 5-HMF can reach 95.4 % and 71.3 %, respectively. [Teim - PS][AlCl 4 ] 4 as the catalyst can be reused at least six times, the yield of 5-HMF does not decrease significantly. The biphasic system was beneficial for the recycling of [Teim - PS][AlCl 4 ] 4 and the separation of 5-HMF. The catalytic system also has good applicability to the degradation of other carbohydrate compounds. In addition, the kinetic analysis was performed on the catalytic system, and its activation energy was only 49.98 KJ/mol. This work provides a new solution for the efficient and green conversion of glucose to 5-HMF.
研究领域:
化学工程
·
绿色化学
·
催化科学
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Juhao Wu,Hong Tian,Fan Gu,Hai Ning,Junjie Huang,Binbin Chen,Yanlin Zeng,Huimin Mao,Xinmiao Wang
Pyrolysis technique can effectively convert waste plastics into high-performance asphalt modifiers, improving the asphalt pavement performance, thus achieving the resourceful utilization of waste plastics as building materials. Selecting Polypropylene (PP) and polystyrene (PS) as raw materials, pyrolysis experiments were conducted to explore their synergistic interaction. Using Thermogravimetric analysis (TGA), tube furnace, and gas chromatography-mass spectrometry (GCMS), the effects of plastics mixing ratio and Ni loading in HZSM-5 on the pyrolysis products and heavy oil composition were investigated. Based on the optimal heavy oil, the high and low temperature performance and aging resistance of the heavy oil modified asphalt were quantitatively evaluated. The results showed that the PP/PS co-pyrolysis exhibited higher conversion efficiency, with a 1:3 ratio maximizing liquid yield at 74.26 %. Ni-modified HZSM-5 effectively boosted the production of aromatic hydrocarbons in heavy oil while inhibiting the generation of phenols, acids, organosilicons and other non-hydrocarbon byproducts. The optimal Ni loading was 10 wt%, which maximized aromatic hydrocarbon content at 81.36 % within 90.6 % polycyclic aromatic hydrocarbons (PAHs), achieving the best modulation of pyrolysis heavy oil components. The addition of heavy oil significantly improved the high-temperature stability and aging resistance of asphalt, though impairing low-temperature cracking resistance. The optimal oil content was 6 wt%, making the softening point increased by 10.3°C. This advancement promoted the conversion of waste plastic heavy oil into high-performance asphalt modifiers to avoid difficult combustion, providing theoretical support and technical guidance for its high-value application in the asphalt pavement field.
研究领域:
材料科学
·
环境工程
·
化学工程
·
道路工程
·
资源循环利用
·
催化化学
·
高分子材料
·
建筑材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 39
·16877-16890
·
IF 3.288
Xiangbo Song,Chenguang Wang,Lungang Chen,Qiying Liu,Jianguo Liu,Yuting Zhu,Jun Yue,Longlong Ma
Ionic liquids (ILs) as additives were used in the selective conversion of bio-based carbohydrates to 5-hydroxymethylfurfural (HMF) in this work. The effect of adding various imidazole-based ionic liquids with different anion structures on the production of HMF from fructose was firstly investigated in aqueous media. The presence of 15 wt% 1-butyl-3-methylimidazole chloride ([Bmim]Cl) ionic liquids in water with Fe2(SO4)3 as the homogeneous catalyst provided a more effective HMF synthesis compared to that without [Bmim]Cl addition. The enhanced HMF yield was mainly attributed to the fact that [Bmim]Cl might play a vital role in stabilizing the HMF molecule, which could thereby suppress side reactions involving HMF (e.g., its rehydration to levulinic acid or/and polymerization to humins). NMR and FTIR analyses suggested that such a stabilization effect stemmed from the interaction of [Bmim]Cl with the hydroxyl and aldehyde groups of HMF through hydrogen bonding. By performing the operation in a biphasic system (i.e., with the biomass-derived THF solvent as the organic phase and the addition of NaCl salt into water for improving HMF partition), the HMF yield over the Fe2(SO4)3 catalyst in the presence of the [Bmim]Cl additive could be further improved. The catalyst and ionic liquids were quite stable, and could be reused for more than five cycles with a consistent activity. A similar enhancement effect of [Bmim]Cl was also demonstrated in HMF synthesis with better yields from other biomass feedstocks or derivatives (including glucose, sucrose, cellobiose, inulin and starch) in aqueous media.
研究领域:
化学工程
·
催化
·
绿色化学
·
生物化工
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 9
·e202203332
·
IF 2.1
Cunwei Qian,Ying Wang,Xian Li,Changsheng Yao
Graphical A convenient, rapid and electrochemical one-pot protocol is designed for the synthesis of pyrazolo[3,4- b ]quinolines derivatives. The reaction is carried out in an undivided cell equipped with an iron cathode and a graphite anode in the presence of sodium bromide as a supporting electrolyte. Fourteen pyrazolo[3,4- b ]quinoline derivatives are obtained under a constant current of 30 mA after 0.14 F/mol of electricity passed. A convenient, rapid and electrochemical one-pot protocol was developed successfully for the preparation of pyrazolo[3,4- b ]-quinoline derivatives. The reaction is carried out in a 25 mL three neck flask equipped with graphite electrode as anode and iron electrode as cathode (electrode area of 1 cm 2 ) with sodium bromide as supporting electrolyte at room temperature in ethanol. Fourteen pyrazolo-[3,4- b ]-quinoline derivatives were synthesized by use of various aldehyde (including aryl aldehydes and aliphatic aldehydes), dimedone and 5-amino-3-methyl-1-phenylpyrazole as substrates in good yields (76–86 %) with a constant current of 30 mA after 0.14 F/mol of electricity passed. All aimed products were characterized by IR, 1 H NMR and HRMS. Notably, the presented method features ecologically sound, simple experimental procedure and good yields.
研究领域:
有机化学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）