CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2023
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IF 3.1
Xiang Shuang,Guo Yong,Liu Xiaohui,Wang Yanqin
The interface between Au and support has attracted extensive interest because of its unique catalytic ability for hydrogen activation in catalytic hydrogenation/hydrogenolysis reactions. Herein, we create the Au-CoO-O V interface in the 1.0%Au/Co 3 O 4 -Rod-250 catalyst, which could dissociate H 2 via the heterolytic way to yield rich hydride species and achieve excellent catalytic performance in the hydrogenolysis of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF). The XRD and HRTEM analyses show that Au nanoparticles are uniformly dispersed on CoO-O V surface and in situ DRIFTS spectra show the enhancement of heterolytic dissociation of hydrogen (signals of Au—D and O—D vibration) compared with bare CoO (Co 3 O 4 -Rod-250). This work provides insights for fabricating highly active Au-support catalysts for catalytic hydrogenation/hydrogenolysis reactions.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 19
·7952-7959
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IF 4.177
Qiao Sun,Min Liu,Keyan Li,Yitong Han,Yi Zuo,Junhu Wang,Chunshan Song,Guoliang Zhang,Xinwen Guo
A series of MIL-53(Fe)-type materials, Fe(BDC)(DMF,F), were prepared by using different ratios of n(FeCl3)/n(FeCl2), which have varied amounts of Fe2+ in their frameworks. From FeCl3 to FeCl2, the structures of the synthesized samples transform from MIL-53(Fe) to Fe(BDC)(DMF,F). Along with this structure transformation, the crystal morphology goes through a striking change from a small irregular shape to a big triangular prism. This phenomenon indicates that the addition of FeCl2 is beneficial for the formation of a Fe(BDC)(DMF,F) structure. The catalytic activity of these iron-containing MOFs was tested in phenol degradation with hydrogen peroxide as an oxidant at near neutral pH and 35 °C. The degradation efficiency of these samples increases gradually from MIL-53(Fe) to Fe(BDC)(DMF,F). 57Fe Mössbauer spectra reveal that Fe2+ and Fe3+ coexist in the Fe(BDC)(DMF,F) framework, and the highest amount of Fe2+ in the sample prepared with mixed FeCl3 and FeCl2 is 26.0%. The result illustrates that the amount of Fe2+ in the samples can be controlled using varied n(FeCl3)/n(FeCl2) in the feed. The diverse amount of Fe2+ in this series of FeMOF materials exactly explains the distinction of reaction efficiency. The iron leaching tests, structures of the fresh and used catalysts, and the data of the recycling runs show that the Fe-containing MOFs are stable in this liquid-phase reaction.
研究领域:
材料科学
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环境化学
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催化
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DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 14
·145717
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IF 3.551
Wei Yue,Meifeng Hao,Bin Yu,Ruizhuo Ouyang,Yuqing Miao
The synthesis of inorganic micro-/nano-materials by dry combustion is somewhat dangerous since it is performed under high temperature. The ultrathin Bi nanofilms with 3D structures were synthesized using a safe approach of non-combustion explosion in H2O/DMF solution at room temperature and atmospheric pressure. The violent reaction between H2O2 and NH3 · H2O resulted in a non-combustion explosion due to the fast evolution of gases. Then under high temperature and high pressure during solvothermal process, the further slight explosion occurred where the oxygen-containing molecules of H2O2 and NO3− acted as oxidants, while the hydrogen-containing molecules of NaBH4, NH3 · H2O and DMF acted as reductants. The release of gases was accompanied with BiIII reduction by NaBH4. The 3D structure of ultrathin Bi nanofilms with many void spaces formed due to the explosive force and foams from the sharp liberation of gases. Such ultrathin Bi nanofilms with 3D structure exhibited outstanding catalytic activity for p-nitrophenol hydrogenation which is important to treat the environmental pollution from p-nitrophenol discharge. Within only several seconds p-nitrophenol hydrogenation was completed without delay. The non-combustion explosion exhibits potential applications for the synthesis of 3D ultrathin film materials as high efficient catalysts.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
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2017
·Vol. 5
·期 25
·13032-13038
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IF 8.867
Jiajie Mo,Chunfu Zhang,Jingjing Chang,Haifeng Yang,He Xi,Dazheng Chen,Zhenhua Lin,Gang Lu,Jincheng Zhang,Yue Hao
The performance of perovskite solar cells (PSCs) is extremely dependent on the morphology and crystallization of the perovskite film. However, the complete conversion of PbI2 to perovskite and controlling the perovskite crystal size as well as its surface morphology are challenging in the conventional two-step sequential deposition method. We herein present a facile method involving the use of a polar solvent additive in an inter-diffusion two-step sequential deposition method to achieve a high-quality perovskite film. The results showed that the addition of a small amount of DMF solvent into the MAI precursor solution could help the complete conversion of PbI2 to perovskite, and at the same time could also reduce the pinholes, improve the film morphology, increase the grain sizes and enhance the film absorption ability. The improved perovskite film quality results in the boosting performance of PSCs. Consequently, an optimized device with power conversion efficiency as high as 19.2% is obtained. This current method provides a highly repeatable route for enhancing the PSC performance with the inter-diffusion sequential solution deposition method.
研究领域:
材料科学
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光伏技术
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纳米技术
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薄膜技术
✓ 已验证
DOI
高影响因子
POLYMER
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2022
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IF 4.432
Yu-Lin Hong,Jian Sun,Hong-Wei Yang,Chang Wang,Yun Liu,Zhi-Wei Tan,Cheng-Mei Liu
Nitrile-rich polymers have found applications in carbon fibre, functional materials and rubber industry, though nitrile-rich polyelectrolytes have seldom been reported before. Here we present a nitrile-rich reactive phosphonium-based polyelectrolyte (PVBzTCPC) synthesized by the RAFT polymerization of 4-vinylbenzyl-tris(2-cyanoethyl)phosphonium chloride (VBzTCPC), a CN-rich phosphonium monomer prepared from tris(2-cyanoethyl)phosphine (TCP) and 4-vinylbenzyl chloride. The RAFT polymerization behaviour of the monomer was studied and it was found that the polymerization of monomer proceeded in a controlled/living manner. PVBzTCPC underwent the Wittig reaction and vinyl groups were introduced into the polymer chain as polymerizable pendant groups. Post-polymerization modifications of PVBzTCPC through the nitrile group proceeded successfully and the modified polymers were also phosphonium-based polyelectrolytes. PVBzTCPC showed a high tendency to form an undissolved polyelectrolyte complex with sodium perfluorooctanoate in aqueous solution, which provided a possible way of removing this persistent organic pollutant from water. The DMF solution of CN-rich PVBzTCPC showed LCST-type (lower critical solution temperature) phase transition without adding any foreign salts over 100 °C, and a possible mechanism of LCST transition was proposed.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Ni-Jie Liu,Jun-Yan Yu,Xing-Yu Chen,Li-Fen Liu
Organic solvent ultrafiltration (OSU) membrane as the crucial supporting layer of thin-film composite (TFC) organic solvent nanofiltration (OSN) membrane can help the OSN technology to satisfy the rapidly growing demand for small-molecular separation and purification in organic solvent systems. Aiming at the two main bottlenecks of poor tolerance to strong polar solvents and low solvent flux of the conventional commercial polyimide (PI) ultrafiltration (UF) membrane, in this study, a facile method was proposed to prepare a novel polyimide/polyethyleneimine@TiO2 (PI/PEI@TiO2) OSU membrane with improved solvent resistance and permeability by synchronously coupling the non-solvent-induced phase transformation (NIPs), chemical crosslinking and interfacial in-situ biomineralization. Dut to the chemical crosslinking between PEI and PI, the PI/PEI@TiO2 membrane exhibited good resistance to more organic solvents including the strong polar aprotic solvents (e.g., DMF, NMP and DMSO), ordinary polar solvents (e.g., ethanol) and nonpolar solvents (e.g., n-hexane). At the same time, PEI synchronously catalyzed Ti-BALDH to in-situ generate the TiO2 nanoparticles via interfacial biomineralization, which improved the solvent flux of the PI/PEI@TiO2 membrane due to the creation of more channels and promoted the compatibility of TiO2 within PI/PEI matrix. Especially, the PI/PEI@TiO2-5 membrane with 5 wt% TiO2 loading showed the optimal solvent resistance and high flux in strong polar aprotic solvents (>50 L m−2 h−1·bar −1 in DMF). Therefore, the resultant new PI/PEI@TiO 2 OSU membrane will have a promising separation application in the organic solvent systems in the future.
研究领域:
材料科学
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化学工程
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膜技术
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DOI
高影响因子
IEEE SENSORS JOURNAL
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2025
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IF 4.5
Zhiwei Zhang,Yi Li,Lulu Liu,Peilin Mao,Lei Zhang,Jie Liang,Jianhua Zhang
Digital microfluidics (DMF) technology provides high-precision and flexible liquid manipulation capabilities for lab-on-a-chip (LOC) systems, enabling complex biochemical reactions and detection analyses within a compact space. Electrowetting-on-dielectric (EWOD), one of the most widely used actuation mechanisms in DMF devices, is favored for its simplicity, controllability, rapid response, and cost-effectiveness. However, due to challenges in fabricating sensors on hydrophobic surfaces, reports on EWOD chips integrated with biosensors remain limited. In this work, we successfully integrated electrochemical sensors into EWOD chips via plasma treatment for surface modification. The plasma-treated EWOD device maintained excellent droplet actuation performance (movement time <8 s) and achieved glucose detection in the 0-0.6 mM range using the embedded sensor. The limit of detection was determined to be 0.056 mM (S/N = 3). This EWOD chip with integrated printed electrochemical sensors represents a promising tool for diverse biochemical analyses.
研究领域:
微流控技术
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生物分析化学
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传感器
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芯片实验室技术
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电化学
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生物医学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Wenpeng Han,Shujuan Wang,Fujiang Geng,Lei Liu,Ruidi Wei,Mingxing Tang
An efficient and selective nickel-molybdenum nitride catalyst has been developed for the hydrogenolysis of 5-hydroxymethylfurfural (HMF) to produce 2,5-dimethylfuran (DMF). The results showed that Ni2Mo3N phase of the catalyst exhibited good hydrogenation activity for HMF, while Ni6Mo6C1.06 phase demonstrated effective C-O bond hydrogenolysis activity. By regulating the Ni/Mo molar ratios, the proportions of the Ni2Mo3N and Ni6Mo6C1.06 phases can be adjusted, and the NiMoNx (Ni:Mo=1:2) catalyst with good performance was prepared. Additionally, 2-propanol, as a good solvent, can react with HMF to form ethers, facilitating easier hydrogenolysis. This method leads to full conversion of HMF, achieving a 99% yield of DMF at 160 oC and 2 MPa H2 for 5 h. Furthermore, the catalyst displayed good recyclability, maintaining its activity over 4 cycles, indicating it has the potential application for the industrialization of 5-HMF hydrogenolysis to produce DMF.
研究领域:
催化
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化学工程
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绿色化学
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有机合成
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可再生能源
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材料科学
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产品关联
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 19
·4159-4163
·
IF 5.686
Dongxia Jiao,Yehong Wang,Zhixin Zhang,Jian Zhang,Lijun Lei,Feng Wang
Graphical Synthetic methods : We designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalyst which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The combination of characterization results and control experiments showed that positively charged Ru species, particularly the hydrated RuO x particles on the surface were essential to the high catalytic activity of Ru-HAP in the formylation reaction. Formamide is an important solvent and synthetic intermediate. Herein, we designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalysts which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The Ru-HAP showed excellent catalytic performance in N,N-Dimethylformamide (DMF) synthesis, with about 75 % dimethylamine conversion and >99 % DMF selectivity at 300 h of continuous reaction. The combination of characterization results and control experiments showed that positively charged Ru species, including hydrated RuO x and Ru 3+ species, were catalytically active. In particular, the surface RuO x species were more active than the Ru 3+ species located within the HAP framework.
研究领域:
催化
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材料科学
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化学工程
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无机化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2017
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IF 2.323
Shiming Xu,Wei Wang,Xi Wu,Jungyong Hu,Mengnan Jiang
Vapor–liquid equilibrium data of binary working pairs play a crucial part in the research of absorption process and absorption refrigeration technology. In this paper, the VLE data of binary mixtures, R124-NMP and R124-DMF, were measured in a temperature range from 303.15 to 363.15 K, using a VLE measurement apparatus. The activity coefficient model of five-parameter nonrandom two liquid (NRTL) was selected to correlate all the VLE data acquired by measurement. The maximum relative deviation of the pressure between the measurement data and calculated data for R124-NMP and R124-DMF were 3.80% and 3.27% respectively, and the average relative deviation of the pressure were 1.25% and 1.17% respectively. The correlated results coincide well with the measurement data and show that the VLE characteristics of R124-NMP and R124-DMF mixtures have a negative deviation from Raoul’s law. Comparing three absorbents, DMF, DMAC and NMP, the activity coefficient of R124 in DMF is largest, that in DMAC is second, and that in NMP is smallest.
研究领域:
热力学
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制冷与空调
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化学工程
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Shangpu Zhuang,Yilin Lei,Fan Xue,Tao Wei,Di Hao,Luming Qi,Lichun Nian,Yuyu Sun,Mifen Cui,Zhuxiu Zhang,Ruiping Wei,Jihai Tang,Xu Qiao
In heterogeneous catalysis research, a significant challenge is to elucidate how metallic copper (Cu0) and cuprous (Cu+) phases interact with their supporting materials, with a special emphasis on how oxygen vacancy (OV) sites participate in hydrogenation processes. In this work, Cu/CexZr10-x catalysts were prepared by introducing Zr-incorporated Ce-MOF, followed by copper impregnation and calcination. Characterization by TEM, XPS, EPR, H2-TPD, Py-IR spectroscopy, and in situ FTIR revealed that Zr doping enhanced the OV concentration, stabilized Cu+ species, and generated abundant Lewis acid sites. The optimal Zr content effectively balances the Cu0/Cu+ redox couples and acid sites, accelerating desired reactions, while excessive Zr incorporation leads to increased Brønsted acidity and promotes undesirable side reactions. These features synergistically enhance the adsorption of 5-HMF, activate carbonyl groups, and facilitate the sequential hydrogenation and deoxygenation processes, thereby achieving 5-HMF fully converted and achieving a 2,5-DMF selectivity of 98.2% under optimal reaction parameters. This study clarifies the cooperative mechanism among Cu active sites, OV, and acid sites in the conversion of 5-HMF and demonstrates that rational Zr incorporation in MOF-derived Cu/CexZr10-x catalysts can precisely modulate surface properties and significantly improve catalytic performance. These findings offer valuable guidance for the rational design of advanced heterogeneous catalysts aimed at biomass valorization and the production of renewable fuel.
研究领域:
多相催化
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材料化学
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生物质转化
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可再生能源
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可持续化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Baihui Chi,Jingyi Zou,Haixia Pan,Xianliang Yi,Yang Liu,Xuwang Zhang,Zhiqiang Zhao,Jingjing Zhan,Hao Zhou
The challenge posed by the chemical stability of N,N-dimethylformamide (DMF) renders its biological treatment a complex endeavor. Despite the isolation and characterization of numerous DMF-degrading bacterial strains, their limited adaptability to diverse environments has resulted in suboptimal efficacy in the treatment of actual DMF-containing wastewater. This research aims to address this predicament by employing a “top-down” approach to engineer a synthetic bacterial community termed DMF syn . The mineralization of 0.5 % (v/v) DMF (∼4725 mg L −1 ) was efficiently carried out by DMF syn within 4 days. Notably, robust DMF degradation capabilities across a broad spectrum of environmental conditions were observed. In scenarios where N,N-dimethylacetamide (DMAC) and N-methylpyrrolidone (NMP) coexisted with DMF, degradation followed a sequential pattern: NMP > DMAC > DMF. Through 16S rRNA gene sequencing, and metagenomic analysis, potential functional genes and species responsible for DMF degradation were unveiled. The active DMF degraders in DMF syn , including Paracoccus aminovorans bin8, Hyphomicrobium sulfonivorans bin2, Hyphomicrobium zavarzinii bin0, Paracoccus zhejiangensis bin23, and Aquamicrobium lusatiens e bin4, were substantiated by metaproteomic analysis. Furthermore, another DMF-mineralizing bacterium Aminobacter niigataensis DMFA1 was isolated from DMF syn . Molecular dynamics simulations indicated that the preference for DMAC over DMF at the community level is dictated by the substrate specificity of DMFases from Sphingosinicella microcystinivorans bin6. By harnessing a multi-omics approach, conducting pure culture studies, and employing molecular simulations, an intricate mechanism governing DMF degradation and substrate preference within the DMF syn was elucidated.
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DOI
高影响因子
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