JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Zi-Quan Wang,Ya-Peng Du,Xiao-Ping Zheng,Yu Chai,Yu-Cang Zhang,Yan-Zhen Zheng
The direct conversion of raw lignocellulosic waste into specialty chemicals such as levulinic acid (LA) has the potential to significantly enhance biorefinery profitability. Here, we demonstrated that incorporating γ-valerolactone (GVL) as a co-solvent during the SO 3 H-functionalized ionic liquid-catalyzed conversion of bagasse in water markedly enhanced reaction rates and catalytic activity, achieving a LA yield as high as 76.1 % with a 1:1 vol ratio of GVL to water. This catalytic system also effectively converted other lignocellulosic waste to LA. Reaction constants and activation energies for the bagasse dehydration process to LA were obtained. Comprehensive characterization via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) elucidated significant changes in functional groups, surface morphology, and crystallinity index of solid residues over extended reaction times. Notably, hemicellulose and cellulose were converted within 4 h, with lignin remaining in the solid residues and forming by-products after prolonged reaction times. This efficient one-pot conversion method showed promise as a sustainable approach to transform agricultural waste into LA, offering new opportunities for eco-friendly resource utilization.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2019
·Vol. 9
·期 12
·1061
·
IF 3.444
Zhenhua Dong,Pengwei Gao,Yongmei Xiao,Jing Chen,Wentao Wang
We reveal the Suzuki–Miyaura reaction catalyzed by a Pd–Co nanocatalyst supported by Mg–Fe–CHT (calcined hydrotalcites). A variety of boronic acids and aryl halides were transformed into functionalized biphenyls in excellent yields using water as a solvent. The reaction could proceed under mild conditions with a simple operation and high turnover numbers. The excellent catalytic activities are reasonably attributed to the Co-doping, which forms a Pd–Co alloy on the surface of CHT.Keywords:Suzuki–Miyaura reaction;water solvent;nanocatalyst;palladium;cobalt
研究领域:
化学
·
催化材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2022
·Vol. 46
·期 11
·e17058
·
IF 2.609
Bingying Yu,Kegang Wu,Xuejuan Duan,Tong Zhang,Dong He,Xianghua Chai
Hydrosol is a natural aromatic product possessing broad application prospects as a food preservative; however, limited information is available regarding its anti-tyrosinase activity. Here, we investigated the inhibitory effects of Cinnamomum cassia Presl leaf hydrosol (CCPH) and Cymbopogon citratus (DC.) Stapf leaf hydrosol (CCSH) on tyrosinase activity. The primary components of CCPH and CCSH were cinnamaldehyde (82.1%) and citral (52.3%), respectively. The aromatic compound, terpenoid, and nitrogen oxide detectors within the electronic nose yielded higher response values for the two hydrosols. The IC 50 values for CCPH, CCSH, cinnamaldehyde, and citral in regard to their effects on tyrosinase were 84.8 ± 15.5 (vol%), 23.9 ± 2.0 (vol%), 53.3 ± 10.7 mM, and 21.0 ± 6.5 mM, respectively. According to Lineweaver-Burk plot analyses, cinnamaldehyde and citral are both non-competitive inhibitors. Both CCPH and CCSH inhibited browning of mushrooms ( Agaricus bisporus ). These results suggest that hydrosols could be used as potential tyrosinase inhibitors in the food additive and cosmetic industries. Novelty impact statement The primary components of CCPH and CCSH were cinnamaldehyde (82.1%) and citral (52.3%), respectively. The hydrosols and their primary components exerted an inhibitory effect on tyrosinase. CCPH and CCSH could inhibit the browning of mushrooms ( Agaricus bisporus ).
研究领域:
食品科学
·
药理学
·
农业化学
·
植物科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Xiaoqin Shi,Yu Dong,Shufeng Shen
Nonaqueous blends of alkanolamines with 2-alkoxyethanols have recently attracted much attention for an energy-efficient CO 2 capture process. In this work, densities and viscosities of partially CO 2 -loaded mixtures of 2- (methylamino)ethanol (MAE) with 2-methoxyethanol (EGME), 2-ethoxyethanol (EGEE) and 2-butoxyethanol (EGBE) were measured at atmospheric pressure over the temperature range of (293.15 to 353.15) K with amine mass fractions of (0.10, 0.30 0.40 and 0.50) containing various CO 2 loading. It was observed that both densities and viscosities of the carbonated solutions showed noticeable changes as increasing CO 2 loading, amine concentration and temperature. Dimensionless parameters from the CO 2 -free and CO 2 -loaded property data were fitted by proposed correlations. The calculated values of density and viscosity from the correlation models matched well with the experimental results of MAE + CO 2 + 2-alkoxyethanols, with AARDs within 0.28% and 2.20% for density and viscosity respectively. These results are useful to evaluate the mass transfer and hydrodynamic performance in a CO 2 capture process using these nonaqueous absorbents.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1698
·
IF 4.034
Yanliang Yang,Dongsheng Deng,Dong Sui,Yanfu Xie,Dongmi Li,Ying Duan
The hydrogenation of furan ring in the biomass-derived furans is of great importance for the conversion of biomass to valuable chemicals. Fabrication of high activity and selectivity catalyst for this hydrogenation under mild conditions was one of the focuses of this research. In this manuscript, UiO-66-v, in which vinyl bonded to the benzene ring, was first prepared. Then, the uniformly distributed vinyl was used as the reductant for the preparation of Pd/UiO-66-v. The catalyst was characterized by X-ray diffraction, thermogravimetric, N2physical adsorption/desorption, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, energy dispersive spectrometer elemental mappings, and inductively coupled plasma atomic emission spectroscopy to find the Pd/UiO-66-v had a narrow palladium nanoparticles size of 3–5 nm and maintained the structure and thermal stability of UiO-66-v. The Pd/UiO-66-v was used for the hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol in water. 99% conversion of furfuryl alcohol was obtained with 90% selectivity to tetrahydrofurfuryl alcohol after reacted at 0.5 MPa H2, 303 K for 12 h. The Pd/UiO-66-v was proved to be effective for the hydrogenation of furan ring in furans and could be used for at least five times.Keywords:furfuryl alcohol;hydrogenation;tetrahydrofurfuryl alcohol;Pd/UiO-66-v;water solvent
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
PubMed
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 9
·1352-1357
·
IF 3.382
Jian Yin,Guodong Zhang,Xutang Tao
A facile fractional crystallization technique was developed to prepare single crystalline CsPb2Br5 films using water as the solvent, and the films can be easily transferred onto various substrates for the device fabrication. The obtained films can be up to 600 × 600 μm2 and decrease to 50 nm in thickness with high crystalline quality as well as temperature and air stability.
研究领域:
材料科学
·
晶体学
·
光电子器件
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 11
·3208-3218
·
IF 4.912
Yuan Zhao,Hao Xu,Kaige Wang,Kaifeng Lu,Yang Qu,Lingjun Zhu,Shurong Wang
The hemicellulose component of biomass can be efficiently converted into furfural, a well-known biofuel precursor, via a hydrothermal process, in which the reaction medium plays an important role. In this work, the renewable butanone–water solvent mixture was employed in the conversion of C5 carbohydrates for the first time. Experiments combined with molecular dynamics simulation were carried out to study the organic solvent effects on furfural production from xylose. The reaction was catalyzed by an ionic liquid catalyst with Lewis acidity. Results showed that butanone could strengthen the intermolecular attractive force between water and xylose, leading to accelerated protonation and dehydration of xylose as well as enhanced furfural yield. On the other hand, butanone had a shielding effect for furfural against water, and therefore furfural could hardly be involved in side reactions. Under the optimal reaction conditions, the introduction of 80% butanone into the solvent resulted in a significant increase in furfural yield from 9% to 56% at 140 °C. Furthermore, other common model compounds and raw biomass were also tested under similar conditions, from which decent furfural yields of 46% and 36% were obtained from xylan and corn stalk, respectively.
研究领域:
生物化学
·
可再生能源
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yunpeng Wang,Tao Zhao,Xiaoye Bi,Chencheng lv
Week interactions between traditional dye molecules and synthetic fibers requires addition of numerous chemical additives during the dyeing process, resulting in the generation of a significant amount of printing and dyeing wastewater, thereby causing environmental pollution. Herein, three novel carbene dyes containing diazirine were rationally designed, whose decomposition into carbenes at 145 °C subsequently forms covalent bonds with the C–H bonds present in the fibers. The structure-property relationships of the dyes were analyzed based on the results of density functional theory (DFT) calculations. Additionally, the calculations of Yoshida correlations demonstrated that all three dyes exhibit non-explosive properties, thereby indicating their feasibility for large-scale production. The dyeing process of polyester (polyethylene terephthalate/PET), polypropylene (PP), aramid, spandex, and polyester/spandex (P/S) blended fabrics was performed using a non-aqueous solvent dyeing method without the addition of any additives, and the optimal dyeing and color fixation conditions were determined. The samples dyed with carbene dyes displayed similar K/S values compared to conventionally dyed samples, higher color fixation rates, and improved blended dyeing effects, and the reaction mechanism between the carbene dyes and the fibers was elucidated, which proved the versatility and environmental friendliness of the novel carbene dyes and non-aqueous solvent dyeing method. Furthermore, it is noteworthy that all of these dyed fabrics exhibited exceptional color fastness, highlighting the immense potential of the novel carbene dyes in promoting green production in the textile industry.
研究领域:
化学工程
·
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Chao Sun,Wubing Yao,Xu Chen,Yiwen Zhao,Qiqi Wei,Zishuang Chen,Jiashou Wu,Feiyue Hao,Huiping Xie
An environmentally benign, highly efficient, and base-promoted selective amination of various polyhalogenated pyridines including the challenging pyridine chlorides to 2-aminopyridine derivatives using water as solvent has been developed. Featuring the use of the new method, the reaction is extended to the transformation on a large scale. Mechanistic studies indicate that the pathway involving a base aidant dissociation of N,N-dimethylformamide to generate dimethylamine is likely.
研究领域:
有机化学
·
环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 15
·10080-10085
·
IF 4.493
Zhaoming Liu,Yadong Hu,Hongqing Zhao,Yang Wang,Xurong Xu,Haihua Pan,Ruikang Tang
Living organisms such as corals can carry out CO2 looping efficiently via biomineralization under ambient conditions. Inspired by this natural process, we establish a solution system of calcium acetate–ethanol–water (Ca(Ac)2–C2H5OH–H2O) for CO2 chemical looping at constant room temperature. The CO2 capture is achieved by its reaction with Ca(Ac)2 to form calcium carbonate (CaCO3) mineral and HAc in the binary solvent with a high C2H5OH content. However, an increase in the H2O content in the system triggers acetic acid (HAc)-induced CaCO3 dissolution to release CO2. The system can be recovered for CO2 capture readily by the replenishment of C2H5OH. This biomimetic mineralization-based CO2 capture/release is controlled by the ionization states of the electrolytes, and is precisely regulated in the C2H5OH–H2O binary solvent. Our attempt highlights the fundamental principle of solution chemistry in reaction control and provides a bioinspired strategy for CO2 capture/release with very low cost and easy availability.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 39
·15189-15196
·
IF 8.262
Chaolumen Wu,Chenbo Liao,Taoran Li,Yanqiong Shi,Jiangshui Luo,Lei Li,Jun Yang
A polymer lithium–oxygen battery based on lithiated perfluorinated sulfonic conducting ionomers swollen with non-aqueous solvents used as both the electrolyte and separator is successfully operated at room temperature, and shows good cycling stability and rate capability and is even operable for many cycles with a capacity as high as 1500 mA h gcarbon−1. It demonstrates the suitability of the polymer lithium–oxygen battery as a high-energy storage system.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 92
·期 3
·652-661
·
IF 1.986
Li Xiaohua,Yang Zichun,Li Kunfeng,Zhao Shuang,Fei Zhifang,Zhang Zhen
In this paper, transparent flexible hydrophobic silica aerogels were prepared by replacing the traditional alcohol solvent with water, using methyltriethoxysilane (MTES) and cetyltrimethylammonium bromide (CTAB), via acid-base two steps method and CO 2 supercritical drying. The role of surfactant CTAB in the gel–sol process was revealed, and the effect of CTAB concentration on the gel structure was analyzed. With the concentration increasing, the skeleton structure of the gel gradually changed from coarse graininess to continuous fiber. The obtained aerogels showed good elastic properties. With the increasing of density, the elastic modulus of aerogels gradually increased, so that the length could be restored to 63% of the original length after 50% compression strain. Aerogels also had low thermal conductivity and good thermal stability. The thermal conductivity at room temperature was only 0.0215 W/(m·K) and the initial decomposition temperature was up to 511 °C. For the aerogel with thickness of 11.8 mm and density of 60 mg/cm 3 , it showed good sound absorption and sound insulation properties. When the sound frequency was 2000 Hz, the sound absorption coefficient was 0.91, and the sound transmission loss between 500 and 1600 Hz was 13–21 dB. This work provides a facile approach to fabricate lightweight and flexible silica aerogels for thermal and acoustic insulation applications.
研究领域:
材料科学
·
化学工程
✓ 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）