Biomass Conversion and Biorefinery
·
2022
·Vol. 13
·期 18
·17247-17254
·
IF 4.05
Wang Wei,Zhang Zhe,Wang Min
The electrochemical catalytic oxidation of 5-hydroxymethylfurfural (HMF) derived from biomass to produce 2,5-furandicarboxylic acid (FDCA) has attracted significant attention. Herein, the catalyst NiO-N/C composite was prepared and showed high activity for the electrochemical oxidation of HMF. The optimized NiO-N/C composite electrode supported by foamed nickel exhibits 99% conversion of HMF, 84% yield of FDCA, and 96% faradic efficiency. The NiO-N/C composite electrode is stable and remains active after six consecutive measurements. This work provides an effective method for the design and preparation of biomass energy electrocatalysts based on nitrogen-modulated NiO materials.
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DOI
高影响因子
Carbon Neutrality
·
2025
·Vol. 4
·期 1
·1-9
·
IF 12.5
Yang Delong,Dai Jinhang,Du Ziting,Cao Qingya,Chen Gang,Qi Ting,Wang Weilu,Li Fukun
Since 3-acetylamino-5-acetylfuran (3A5AF) has been regarded as a promising nitrogen-containing synthon, the conversion of renewable chitin and its monomer N-acetyl-D-glucosamine (NAG) to 3A5AF is of significance. In this paper, we compared the catalytic activity of several Cl-containing compounds and found that LiCl exhibited superior performance. The effects of solvent, catalyst dosage, reaction temperature, and reaction time on the synthesis of 3A5AF were investigated. Under the optimized conditions, about 60% yields of 3A5AF were obtained in N-methyl-2-pyrrolidone (NMP) or dimethylacetamide (DMA) medium. The spent LiCl and DMA could be recycled and reused, without obvious decrease of 3A5AF yield. Moreover, the formed 3A5AF could be purified by a facile procedure. Experiment results and density functional theory (DFT) calculations revealed that homogeneous Cl − was vital for 3A5AF formation. This study provides an example for the effective conversion of chitin biomass to value-added compounds.
研究领域:
有机化学
·
催化化学
·
可再生资源利用
·
理论计算化学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Yunchao Feng,Wenlong Jia,Guihua Yan,Xianhai Zeng,Jonathan Sperry,Binbin Xu,Yong Sun,Xing Tang,Tingzhou Lei,Lu Lin
Directly oxidative esterification of Biomass-derived 5-hydroxymethylfurfural (HMF) into dimethyl furan dicarboxylate (DMFDCA) is a promising route for the replacement of petroleum-derived commodity chemical terephthalic acid (TPA) extensively employed in polyester synthesis. Co-based N-doped carbon materials are one of the most promising applied catalysts for oxidative esterification reaction, however, the active sites and reaction pathway of these catalysts have not been clearly clarified, which is crucial to the practical application. Herein, we report that ZIF-67 (a zeolitic imidazolate framework (ZIF)-type cobalt-containing MOF) derived Co@C-N material is a highly effective catalyst for the selective conversion of HMF into DMFDCA in 95% yield. The high activity of the ZIF-67 derived nanocarbon composites Co@C-N can be attributed to the electron transfer between nitrogen-doped carbon shells and Co nanoparticles. The appropriate graphitic N and pyridinic N doping increases the electronic mobility and active sites. Density functional theory (DFT) simulations indicated that oxygen, HMF and methanol molecules are adsorbed and activated on C-N materials. Furthermore, no 2, 5-diformylfuran (DFF) was captured as an intermediate because the oxidative esterification of aldehyde preferentially occurred than the oxidation of hydroxyl group in HMF. We anticipate that these results can drive progress in the bio-based polymers sector and oxidative esterification reaction.
研究领域:
生物质化学
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催化反应
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材料科学
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理论计算
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DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2014
·Vol. 56
·期 2
·148-153
·
IF 0.633
Wang Kemin,Lu Yuhui,Yin Ruixue,Jiang Yan,Yu Qiang
1,3-benzodioxole-5-yl-methyl-maleimide (BDOMM), a type of hydrogen-abstraction photoinitiator with both hydrogen donor and acceptor in one molecule for free radical photopolymerization, was synthesized through the reaction of piperonyl amine and maleic anhydride and characterized by IR, UV and 1H NMR spectroscopy. The results obtained indicated that the introduction of BDOMM could avoid the use of additional amine coinitiator, decrease the leachablity of photoinitiator and maintain high photo-initiation efficiency.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Inorganics
·
2025
·Vol. 13
·期 8
·272
·
IF 3
Juan Du,Xiang Wan,Caixiong Song,Kangsheng Wu,Wenbing Yang,Beiye Liu,Qi Yang,Jingjing Fang,Ayesha Razzaq
Crystal twinning, a common growth phenomenon, can substantially affect material performance in fields such as semiconductors, nonlinear optics, and drug development, yet its elimination during crystallization is challenging. This study presents a method for the controlled synthesis of ZSM-5 zeolite as either single crystals or twinned crystals using kaolin as the primary raw material. The method leverages the etching effect of ammonium fluoride (NH4F) on the aluminosilicate structure derived from pre-treated kaolin. By adjusting the concentrations of NH4F and the structure-directing agent tetrapropylammonium bromide (TPABr), pure ZSM-5 single crystals and twinned crystals were selectively synthesized. Conventionally, NH4F is employed to introduce defects into zeolite structures. In contrast, this work demonstrates its utility in controlling crystal habit. The synthesis utilizes kaolin, an abundant and low-cost aluminosilicate mineral, to provide the entire aluminum source and a portion of the silicon source, offering an economical alternative to expensive precursors like aluminum isopropoxide. The resulting single and twinned crystals exhibited high crystallinity, demonstrating the viability of using natural minerals to produce high-quality zeolites. The physical and chemical properties of the kaolin-derived ZSM-5 were characterized and compared to those of ZSM-5 synthesized from conventional chemical reagents. A growth mechanism for the formation of single and twinned crystals is also proposed.
研究领域:
材料科学
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晶体学
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无机化学
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纳米技术
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化学合成
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
En-Hui Yuan,Meng Li,Ming-Hui Yang,Xiaosheng Huang,Kun Zhang,Weiliang Han,Zhicheng Tang,Zhong-Wen Liu
A direct hydrothermal synthesis strategy is developed to prepare the Cu–Fe-ZSM-5 zeolites by using the ethylenediaminetetraacetic acid disodium dihydrate (EDTA-2Na·2H 2 O) chelated Cu 2+ and Fe 3+ precursors as metal sources. During the crystallization, the metal chelates were spontaneously embedded into the ZSM-5 crystals and subsequently transformed to the zeolites encapsulated copper and iron species after removing the chelating agent via the high-temperature calcination . Rigorous characterizations indicate that the resulted Cu 2+ /Cu + and Fe 3+ /Fe 2+ species are formed ultra-small nano-composites with an average diameter of ∼2.2 nm and highly dispersed in the ZSM-5 zeolite crystals. The acidity of the ZSM-5 zeolites is subtly modulated by the encapsulated Cu–Fe nano-composite. As expected, the as-prepared Cu–Fe-ZSM-5 exhibits outstanding catalytic performance for the selective catalytic reduction of NO x with ammonia (NH 3 -SCR) in the broad reaction temperature ranges of 220–480 °C, which is much better than the Cu–Fe/ZSM-5 prepared with the conventional wetness impregnation method. Furthermore, the resultant zeolites show high stability and good tolerance to H 2 O and SO 2 , and it is very competitive for practical application to eliminate NO x . The developed one-pot hydrothermal synthesis route by using EDTA-2Na·2H 2 O as chelating agent is very convenient and easily reproducible, providing a general guideline to design and fabricate the superior transition metal modified zeolite catalysts for NH 3 -SCR and the related reactions.
研究领域:
催化
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环境科学
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材料科学
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DOI
高影响因子
TECHNOLOGY IN CANCER RESEARCH & TREATMENT
·
2020
·
IF 2.074
AiJun Huang,LiPing Chen,YiMing Wang,ShuQiang Ma,Song Jin,Hanzhou Cai,Xingzhong Huang,Hongbo Zhang,ZengRong Wang,Kun Lin,Fangsiyu Lin
Background:5-fluorouracil (5-FU) is a widely used drug for cancer treatment, but its effect and underlying mechanisms on osteosarcoma (OS) cells remain unclear.Methods:U2OS and MG63 cells were treated with 0, 50, 100, and 500 μM 5-FU. MTS and flow cytometry were used to examine the effect of 5-FU on cell viability and apoptosis, respectively. Circular RNA (circRNA) expression was detected using RNA sequencing and quantitative real-time PCR (qPCR). Differentially expressed circRNAs were further subjected to the Kyoto Encyclopedia of Genes and Genomes (KEGG) and gene ontology (GO) analysis to predict their functions. A circRNA–miRNA–mRNA interaction network was generated to analyze the regulatory networks of 5-FU–induced differentially expressed circRNAs. Western blotting (WB) was used to verify the protein in the downstream of circRNAs.Results:5-FU inhibited the cell viability of the MG63 cells in a concentration-dependent manner. The most significant effect was observed in the cells treated with 500 μM 5-FU. Apoptosis was also increased in the MG63 cells after 500 μM 5-FU treatment for 3 days. RNA sequencing results showed that 183 differentially expressed circRNAs (172 upregulated and 11 downregulated) in 5-FU–treated cells. KEGG and GO analysis showed that the differentially expressed circRNAs were primarily enriched in proliferation-, apoptosis-, and metabolism-related functions. qPCR was used to verify the most upregulated and downregulated circRNAs. The circRNA–miRNA–mRNA interaction network showed that these 8 circRNAs had a sizable regulatory network that links a series of genes involved in tumor suppression.Conclusion:5-FU treatment resulted in the differentially expressed circRNAs that were proliferation- and apoptosis-associated and were involved in the 5-FU–induced inhibition of tumor proliferation in OS cells.
研究领域:
肿瘤学
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分子生物学
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基因组学
·
癌症治疗
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Shijie Gu,Yingyue Cui,Kaihua Wen,Shimou Chen,Jianling Zhao
Layered lithium/manganese-rich oxides (LMR) receive much attention due to its high specific capacity (∼300 mAh g -1 ). However, the serious capacity degradation during cycling hinders the commercial application of the LMR. Herein, 3-cyano-5-fluorophenylboronic acid (CFBA) was applied as an electrolyte additive for enhancing the cycling stability of LMR at high voltage. Linear sweep voltammetry (LSV), density function theory (DFT) calculations and the initial charge d Q /d V profiles indicate that the preferential oxidation of CFBA can improve the oxidative stability of electrolyte. By adding 0.7 wt% CFBA into standard (STD) electrolyte (1 M LiPF 6 in EC :EMC:DMC = 1:1:1, by weight), the LMR/Li half-cell delivered a discharge capacity of 245 mAh g -1 with a capacity retention of 88.4% after 200 cycles at 0.5C, while only 68 mAh g -1 with 25.2% retention in STD electrolyte. Further characterizations and theoretical calculation illustrate that CFBA can effectively eliminate the harmful HF, which improve the electrochemical performance . More importantly, the CFBA participates in the formation of a thin and uniform protective cathode-electrolyte interface (CEI) film on the surface of LMR, which effectively suppresses electrolyte decomposition and protects the structural integrity of LMR.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Liu Wanni,Shi Xian,Liu Dongqi,Xing Xinyi,Ruan Mengya,Sun Song,Lyu Gaojin,Xu Siquan
Converting glucose-based carbohydrates such as microcrystalline cellulose and cellulose components in lignocellulose into 5-hydroxymethylfurfural (HMF) is a feasible way to achieve high-value utilization of biomass. To this end, this work assembled a series of bifunctional (x)Hf/SBA-15-S catalysts by introducing active hafnium species and grafting sulfonic acid groups onto the mesoporous SBA-15 silica carrier to drive the conversion of glucose, cellulose and untreated wheat straw into HMF. Through detailed parameter evaluation, competitive HMF yields were achieved from glucose (74%) and cellulose (51%), respectively. More importantly, the cellulose and hemicellulose components in untreated wheat straw could be efficiently converted simultaneously to obtain HMF and furfural with yields of 50 and 30%, respectively. Systematic characterization revealed that (x)Hf/SBA-15-S catalysts had an ordered pore channel, bifunctional acidity and good hydrothermal stability, which were beneficial to the process of cellulose undergoing depolymerization, isomerization and dehydration to produce HMF. Therefore, it is believed that the catalytic transformation strategy presented in this study has application prospects for realizing the utilization of glucose-based carbohydrates.
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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材料科学
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化学工程
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 15
·3933-3946
·
IF 5.726
Ting Wang,Yuebing Xu,Chengming Shi,Feng Jiang,Bing Liu,Xiaohao Liu
Direct conversion of syngas (CO/H2) into aromatics over tandem catalysts via the Fischer–Tropsch synthesis (FTS) route has attracted much attention because of its high one-pass conversion and milder reaction conditions. However, the complicated FTS product composition leads to more difficult mechanistic elucidation of aromatics formation compared to the methanol route. Herein, a series of strategies, such as covering external surface acid sites of HZSM-5 with a layer of inert SiO2, layered loading of an FeMn FTS catalyst and HZSM-5 zeolite in one reactor and two tandem reactors, and model reactions with ethylene and propylene over zeolite in a simulated FTS reaction environment, were applied to unveil the reaction mechanism and related factors affecting aromatic selectivity. It was found that different from the methanol route, the tandem FeMn–HZSM-5 catalyst produced aromatics mainly from the conversion of C5+ FT intermediates rather than light olefins (C2=–C4=). SiO2 coating could remarkably enhance the para-xylene (PX) selectivity due to hindering of its isomerization to major meta- and minor ortho-xylene (MX and OX) on the external surface acid sites of HZSM-5 by releasing the space confinement. The layered loading experiments in one reactor demonstrated that a farther distance from the FTS catalyst to zeolite largely increased the selectivity to BTX (benzene, toluene and xylene) in total aromatics from 48.3% to 68.9% on a carbon molar basis by suppressing the alkylation reaction of benzene and toluene with ethylene due to an obviously lower local ethylene concentration on HZSM-5. FeMn and HZSM-5 with layered loading in two tandem reactors confirmed that light olefins (C2=–C4=) were mainly hydrogenated and isomerized into paraffins. The model reactions with ethylene and propylene in a simulated local FTS reaction environment revealed that the presence of H2O and CO2in situ produced from the FTS reaction played a crucial role in promoting the aromatics formation at obviously lower reaction temperature which resulted from the enhancing acid strength and the driving H transfer to facilitate the cyclization and dehydrogenation reaction. This study provides a clear perspective for the aromatics formation mechanism and the tuning of the aromatic selectivity.
研究领域:
化学工程
·
催化科学
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Junting Dong,Guoliang Zhang,Fucong Liu,Houjun Qi,Kan Xing
COF-5 is an excellent choice as a lubricant additive due to its high specific surface area and regular layer stacking structure. In this paper, the porous covalent organic frameworks of the COF-5 nanomaterial were successfully synthesized as a lubricant additive via a method of sonochemical synthesis. Pure [BMIM][SCN] (BS) was used as the base oil, and the tribological properties of the COF-5-BS composite lubricant were evaluated by using a ball-on-disk wear tester. The results were demonstrated that the wear volume of BS with the addition of 0.1 wt % COF-5 was reduced by 46.64% as compared to that of the pure BS, and the corrosion on the friction interface was effectively inhibited by the addition of COF-5 nanomaterial. This phenomenon was ascribed to COF-5 with a large specific surface area, being adsorbed onto the friction interface, which could repair the wear-induced pits and prevent the direct contact between the metal substrate and the corrosive medium. The tribological properties of the COF-5-BS composite lubricant could be efficiently regulated under the applied electric current. The results of intelligent electric current-controlled friction were indicated that the average coefficients of friction (COF) under the current stimulation of 30 mA with on/off cycling were reduced by 12.05% as compared to that of a continuous current operated for 1 h. Moreover, the wear volume and depth were reduced by 11.69% and 8.75%, respectively. That is because the short duration of current regulation could enhance the rapid formation of a lubricant film composed of BS liquid and COF-5 nanosheets on the friction interface. Meanwhile, the temperature on the interface would not be high to produce the failure of lubricating film, resulting in an excellent low friction coefficient and excellent antifriction property.
研究领域:
材料科学
·
摩擦学
·
表面工程
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产品关联
DOI
PubMed
高影响因子
Inorganic and Nano-Metal Chemistry
·
2017
·
IF 0
Jiaxing Li,Meng Ni,Chaoyi Fan,Yan Li,Xiuqing Zhang
A new cobalt complex [Co3(SIP)2(4-PP)8(H2O)6]·4H2O·2(4-PP) (1) with 5-sulfoisophthalic acid sodium (NaH2SIP) and 4-phenyl pyridine (4-PP) as ligands has been synthesized in the mixed solvents of ethanol and water. It crystallized in monoclinic, space group P21/c, with a = 20.9642(9) Å, b = 15.6091(5) Å, c = 20.0126(8) Å, α = 90.00°, β = 115.493(6)°, γ = 90.00°, V = 5911.2(4) Å3, Z = 2, Dc = 1.346 g/cm−3, F(000) = 2494, the final GOOF = 1.038, Rint = 0.0258 and wR2 = 0.1793. The complex (1) was characterized by single-crystal X-ray diffraction, magnetic susceptibility and IR spectroscopy analyses. Single-crystal X-ray diffraction shows that complex (1) is trinuclear based on cobalt units. Magnetic susceptibility measurement indicates that complex (1) shows an antiferromagnetic coupling between the Co(II) ions.
研究领域:
无机化学
·
材料科学
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DOI
危险品化学品经营许可证（带存储）