Processes
·
2025
·Vol. 13
·期 4
·1110
·
IF 2.8
Shikang Zhao,Guohong Chen,Kaiqi Zheng,Shaojie Li,Jiaqi Xu,Fanan Wang,Xueping Liu,Rengui Weng
γ-Valerolactone (GVL) is a promising bio-based platform molecule with significant potential for energy applications. The production of GVL via biomass-based levulinic acid (LA) is an important reaction. To enhance the conversion and selectivity of non-precious-metal catalysts in the LA-to-GVL process and to better understand the key factors influencing this conversion, we conducted a series of experiments. In this study, supported Cu-Ni bimetallic catalysts (Cu-Ni2/Al2O3) were prepared using layered double hydroxides (LDHs) as a precursor. Compared with Cu-Ni catalysts synthesized via the conventional impregnation method, the Cu-Ni2/Al2O3catalysts exhibit higher catalytic activity and stability. The results demonstrated that efficient conversion was achieved with isopropanol as the hydrogen donor solvent, a reaction temperature of 180 °C, and a reaction time of 1 h. The yield of GVL reached nearly 90%, with a decrease of approximately only 6% after six consecutive cycles. The Cu-Ni2/Al2O3catalyst proved to be effective for converting biomass-derived LA to GVL, offering a route that not only reduces production costs and environmental impact but also enables efficient biomass-to-energy conversion.
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 36
·16750-16759
·
IF 3.591
Yining Zheng,Cundi Wei,Qi An,Jinsheng Yu,Shaonan Xu,Lina Li
The aluminum alloy is used as the aluminum source, together with melamine and cyanuric acid, in a water reaction system to obtain the precursor of Al2O3/g-C3N4 through self-assembly in one step, and then calcined to obtain the Al2O3/g-C3N4 composite photocatalytic material. γ-Al2O3 has a defect site that can accept g-C3N4 electrons and can bind well with g-C3N4. The addition of γ-Al2O3 changed the morphology of g-C3N4 into a damaged tubular structure with many irregular pores. Also, the specific surface area increased to about 1.2 times that of g-C3N4, and the light absorption edge was extended to 500 nm. In addition, the position of the valence band of g-C3N4 was also changed. Compared with g-C3N4, Al2O3/g-C3N4 has better photocatalytic performance, and the degradation rate of dye rhodamine B (RhB) is about 1.70 times that of g-C3N4.
研究领域:
材料科学
·
环境科学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xin Song,Wenjie Pan,Fangjun Shao,Zijiang Zhao,Xiaonian Li,Zhongzhe Wei,Jianguo Wang
The development of alkyne semihydrogenation catalysts with high conversion and selectivity under mild conditions is extremely challenging. Here, the modulation of Pd by different crystalline aluminas was investigated to improve the reaction performance. XPS confirmed that different crystalline aluminas modified the electronic structure of palladium. The Pd0.5/γ-Al2O3 catalyst with a Pd loading of 0.48 wt % attained 98% conversion and 91% selectivity. Stronger interaction of the γ-Al2O3 support with the loaded Pd nanoparticles resulted in electron deflection toward the support. The electronic structure of Pd was altered by modulating the crystallographic shape of the support, resulting in metal nanoparticles containing more Pd2+. Electron-deficient Pd2+ adsorbs more strongly on an electron-rich C≡C, which in turn modulates the competitive adsorption of alkenes and alkynes. Finally, the effective semihydrogenation of phenylacetylene was realized at low temperature and pressure.
研究领域:
化学工程
·
催化
·
材料科学
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DOI
高影响因子
Insects
·
2024
·Vol. 15
·期 5
·345
·
IF 2.7
Jifan Cao,Wende Zheng,Baizhong Chen,Zhenping Yan,Xiaowen Tang,Jiahao Li,Zhen Zhang,Song Ang,Chen Li,Rihui Wu,Panpan Wu,Wen-Hua Chen
Simple SummaryThe essential oil (EO) ofCitrus reticulataBlanco cv. Chachiensis (Chachi) exhibited significant larvicidal activity. The EO from semi-mature fruits and its main components were able to control mosquitoes by effectively inhibiting acetylcholinesterase and three detoxification enzymes and significantly altering the diversity of the internal microbiota in mosquitoes.AbstractThe overuse of synthetic insecticides has led to various negative consequences, including insecticide resistance, environmental pollution, and harm to public health. This may be ameliorated by using insecticides derived from botanical sources. The primary objective of this study was to evaluate the anti-mosquito activity of the essential oil (EO) ofCitrus reticulataBlanco cv. Chachiensis (Chachi) (referred to as CRB) at immature, semi-mature, and mature stages. The chemical compositions of the CRB EO were analyzed using GC-MS. The main components were identified to be D-limonene andγ-terpinene. The contents of D-limonene at the immature, semi-mature, and mature stages were 62.35%, 76.72%, and 73.15%, respectively; the corresponding contents ofγ-terpinene were 14.26%, 11.04%, and 11.27%, respectively. In addition, the corresponding contents of a characteristic component, methyl 2-aminobenzoate, were 4.95%, 1.93%, and 2.15%, respectively. CRB EO exhibited significant larvicidal activity againstAedes albopictus(Ae. albopictus, Diptera: Culicidae), with the 50% lethal doses being 65.32, 61.47, and 65.91 mg/L for immature, semi-mature, and mature CRB EO, respectively. CRB EO was able to inhibit acetylcholinesterase and three detoxification enzymes, significantly reduce the diversity of internal microbiota in mosquitoes, and decrease the relative abundance of core species within the microbiota. The present results may provide novel insights into the utilization of plant-derived essential oils in anti-mosquitoes.
研究领域:
植物学
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公共卫生
·
昆虫学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Lihua Qian,Guojun Lan,Xiaoyan Liu,Zhenqing Li,Ying Li
The hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) by using water as solvent is a crucial process in the production of fine chemicals from biomass. An ultrathin carbon layer coating CoRu bimetallic catalyst supported on silica (CoRu@C/SiO 2 ) is prepared by using tannis-ligated cobalt-ruthenium complex on silica as precursors, and applied for catalyzed synthesis of GVL from LA. Because of the synergistic effect between cobalt and ruthenium, the addition of small amounts of Ru to Co catalysts can increase the catalytic activity in the aqueous hydrogenation of LA. The ultrathin carbon layer covered on the CoRu bimetallic catalyst can greatly reduce the leaching of active metals. The CoRu@C/SiO 2 catalyst achieves high stability and is reused up to 5 runs without significant loss of performance in aqueous hydrogenation of levulinic acid.
研究领域:
催化化学
·
生物质能
·
材料科学
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DOI
高影响因子
Phytochemistry Letters
·
2019
·
IF 1.338
Yu Li,Wei Wei,Ren-Lei Wang,Fang Liu,Yong-Kun Wang,Ran Li,Babar Khan,Jie Lin,Wei Yan,Yong-Hao Ye
Two new γ-butyrolactone derivatives, colletolides A and B ( 1 and 2 ), together with three known compounds, sclerone ( 3 ), 3-methyleneisoindolinon ( 4 ) and indole-3-acetamide ( 5 ), were isolated from the culture of the endophytic fungus Colletotrichum gloeosporioides B12, which resides in the medicinal plant Illigera rhodantha Hance. Their structures were characterized by a combination of HR-ESI-MS, NMR and ECD spectra. Compounds 1 and 2 showed moderate antibacterial activity against Xanthomonas oryzae pv. oryzae , X. oryzae pv. oryzicola and Ralstonia solanacearum with the same MIC values of 128 μg/mL.
研究领域:
真菌化学
·
天然产物化学
·
药用植物学
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DOI
高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Rong Yang,Xin Liu,Yanhan Ren,Wenliang Xue,Shuai Liu,Penghui Wang,Ming Zhao,Hong Xu,Bo Chi
The most significant challenge in designing wound dressings is to mimic the tissue microenvironment because of the pro-regenerative structural and functional properties of skin. Herein, we developed a type of bionic extracellular matrix (ECM) hydrogels based on thiol-modified poly (γ-glutamic acid) (γ-PGA-SH) and oxidized hyaluronic acid (HA-CHO). The rapid and reversible thiol-aldehyde addition reaction of thiols in γ-PGA-SH and aldehyde groups in HA-CHO provided hydrogels with a dynamic covalent network and endowed them with properties of adaptability and self-healing capability, which are conducive for initial wound coverage and for prolonging the lifespan of the dressing. Interestingly, these hydrogels also showed typical viscoelastic characteristics similar to those of natural ECM, degradation property in vitro and in vivo , and free radical scavenging capability. In addition, the gelation time, rheological behavior, mechanical property, porous structure, and degradation process of the hydrogels could be tuned by adjusting polymer content. Furthermore, the ECM-inspired hydrogels significantly enhanced the wound healing process in vivo in a full-thickness skin defect model compared to those by commercial dressing (Tegaderm™) by facilitating angiogenesis and promoting collagen deposition. The successful application of the multifunctional hydrogel as an antioxidant wound dressing for wound treatment significantly exhibited its great application potential for biomedical areas. Statement of significance The application of tissue engineering techniques to repair full-thickness skin wounds remains a great challenge in clinical trials . Among the recent approaches used for wound healing, in situ forming injectable hydrogels have gained much attention, and few of them have shown satisfactory overall performance, such as integration into the wound bed, biodegradability , immunocompatibility, vascularization , and recapitulation of the structure and function of skin. In the present study, we designed a simple and convenient in situ forming injectable adaptable self-healing hydrogels with biodegradability and antioxidative properties, which could substantially improve wound healing quality at an affordable cost. The hydrogel-based wound dressing is expected to solve the abovementioned problems and help in promoting cutaneous wound healing.
研究领域:
组织工程
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伤口愈合
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生物材料
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生物医学工程
·
药学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Tengfei Yang,Ying Huo,Yang Liu,Zebao Rui,Hongbing Ji
Rational design of efficient noble metal catalysts and its application process by the interface promoted strategy is an emerging research field. Herein, highly efficient nickel hydroxide promoted PtNi(OH)x/γ-Al 2 O 3 catalysts for room temperature HCHO oxidation was developed. PtNi(OH)x/γ-Al 2 O 3 demonstrates remarkably better performance than the state of the art non-reductive oxide supported Pt catalysts, and ranges among the best performance of the reductive metal oxide supported Pt catalysts. A (>)99% HCHO conversion and a (>)100 h stable performance at 30 °C were obtained over PtNi(OH)x/γ-Al 2 O 3 with a 0.3 wt% Pt loading amount. Various characterizations, including in situ DRIFTS study, were performed to understand the reason for the enhanced performance of PtNi(OH)x/γ-Al 2 O 3 . The superior performance is attributed to the formation of enormous Pt/Ni(OH)x interface, and the preferred hydroxyl facilitated HCHO oxidation pathway through formate oxidation by the abundant associated hydroxyl groups nearby the Pt active sites. Such hydroxyl groups confined interface promotion strategy may bring new insight into the designing of highly efficient bimetallic catalysts and its potential technological applications for HCHO removal.
研究领域:
催化化学
·
环境科学
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DOI
高影响因子
FUEL
·
2026
·
IF 7.8
Luqi Hu,Luyang Qiao,Jinxiang Wang,Xiguang Wang,Yong Gao,Zhangfeng Zhou,Yuangen Yao
Gas-phase dehydrocyclization of 1,4-butanediol (BDO) is an environmentally benign and sustainable route for γ-butyrolactone (GBL) production. In this work, a series of Cu-M (M = Zn, Cr) catalysts was synthesized via coprecipitation and evaluated in a fixed-bed reactor for GBL yield. Under the reaction conditions of 240 °C, 0.1 MPa, and a weight hourly space velocity (WHSV) of 2 mL∙g −1 ∙h −1 , 99.62% of BDO conversion, 99.72% of GBL selectivity, and 2.22 mol GBL ·g catalyst -1 ·h −1 of CBL formation rate were achieved over CuZnCr-600 catalyst, which is higher than reported studies. Long-term test proved that this catalyst could operate over 100 h without any deactivation. Combined microscopic and spectroscopic analysis showed that the calcination conditions affected the surface acidity-basicity of catalysts by changing the CuO content and the strength of the Cr-O bond. The Cu-M compositions significantly influenced the morphology and the electronic properties of Cu species. The incorporation of Cr led to the formation of CuCr 2 O 4 spinel structure, which not only enhanced Cu dispersion but also improved the catalysts’ resistance to sintering. The presence of Zn restrained the phase-transformation of CuCr 2 O 4 from cubic to tetragonal, which ensured the reducible property of CuCr 2 O 4 even under high-temperature calcination. Furthermore, modulating the calcination temperature and the Cu-M compositions maintained an optimal Cu + /Cu 0 ratio under reaction conditions. All these issues contributed to the high yield of GBL and the prolonged lifetime of catalysts.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jian Kong,Xinlei Zhang,Yiwen Yang,Siyu Ma,Jiantao Bi,Yuangang Li
The folding behavior of guest molecules plays a critical role in determining host-guest interaction patterns in supramolecular systems. This study presents a systematic investigation of how amino acid side chains control the folding conformations of pyrene-based guests and thereby direct their recognition by γ-cyclodextrin. Through comprehensive analysis, we demonstrate that extended conformations enable stable inclusion within the cyclodextrin cavity, as evidenced by the emergence of a characteristic excimer fluorescence band at 480 nm, while progressively folded structures lead to weakened interactions due to steric hindrance. The self-shielding effect in rigidly folded molecules, driven by intramolecular π-π stacking between the pyrene core and the aromatic side chain, completely suppresses host-guest complexation. This mechanistic insight is quantitatively supported by molecular dynamics simulations, which reveal that the spatial dimensions of the folded conformers exceed the capacity of the γ-cyclodextrin cavity. These findings establish molecular folding as a key design parameter for programming supramolecular recognition, providing new strategies for controlling molecular assembly through side chain engineering.
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高影响因子
Journal of Materials Chemistry B
·
2026
·
IF 6.2
Dan-Qi Ren,Hui-Zhen Peng,Yue Zhang,Yue Yue,Yu Chen,Yun-Li Zhao,Ming-Long Yuan,Xiao-Dong Luo
Poly(L-lactic acid) (PLLA) microspheres are widely used in aesthetic and regenerative medicine to promote collagen remodeling, but their efficacy and long-term safety lack sufficient experimental data. In this study, a poly(γ-glutamic acid)-thickened PLLA microsphere formulation (PLLA–γ-PGA) was developed, and its biocompatibility and efficacy were evaluated in an aged mice model induced by subcutaneous injection of D-galactose combined with UV irradiation. As a result, PLLA–γ-PGA significantly enhanced dermal fibroblast activation, promoted sustained tissue remodeling and elicited milder inflammatory responses without observable adverse effects, outperforming marketed hyaluronic acid (HA) fillers and PLLA–carboxymethyl cellulose sodium (PLLA–CMC) formulations. These findings present PLLA–γ-PGA as a safe and efficacious regenerative material, providing robust preclinical evidence to support its translational potential for long-term skin rejuvenation.
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产品关联
DOI
PubMed
高影响因子
OZONE-SCIENCE & ENGINEERING
·
2023
·
IF 2.7
Tingfeng Xue,Jing Zhang,Jingcheng Wei,Bingyan Zhu,Jianwei Song,Shuang Xu,Liwei Pan
In this study, a novel NiAl2O4/NiO@γ-Al2O3 catalyst was prepared by the impregnation-calcination method and used for the catalytic ozonation of tartrazine wastewater. The NiAl2O4/NiO@γ-Al2O3 catalyst were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption experiments. It was found that NiAl2O4/NiO@γ-Al2O3 significantly improved the removal of chemical oxygen demand of the dye wastewater from 40% for the direct ozone oxidation to 65%, and the ozone concentration depletion for catalytic ozonation was 120% of that for ozone alone. The catalytic activity of the catalyst did not significantly decrease after reuse for six cycles and leaching concentration of metal ions less than 1%. However, the toxicity of the dye wastewater was greatly reduced after the catalytic ozonation. The pyridine Fourier transform infrared spectroscopy showed the catalytic ozonation reaction was related with Lewis acid sites. The presence of hydroxyl radicals, superoxide anion radicals, and singlet oxygen was verified by an electron paramagnetic resonance, and the quenching experiments confirmed that the removal of organic pollutants from the tartrazine wastewater mainly relied on hydroxyl radicals and singlet oxygen. Therefore, the NiAl2O4/NiO@γ-Al2O3 could be an effective catalyst for the rapid catalytic ozonation of dye wastewater.
研究领域:
环境工程
·
催化化学
·
水处理
·
高级氧化技术
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）