SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chuanli Wang,Chu Sun,Deyang Zhao,Zhiguo Zhu,Kaixuan Yang,Christophe Len,Hongying Lü,Ting Su
A MoS 2 /ZnIn 2 S 4 composite photocatalyst were synthesized via a one-step hydrothermal method for the visible-light-driven oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The reaction was conducted under mild, environmentally friendly conditions, using water as the solvent and without the need for additional oxidizing agents. The flower-like MoS 2 /ZnIn 2 S 4 structure exhibited a high specific surface area, and the formation of a Z -scheme heterojunction between MoS 2 and ZnIn 2 S 4 effectively suppressed the recombination of photogenerated electron-hole pairs, thereby enhancing photocatalytic performance. Density functional theory (DFT) calculations revealed that the 17.5 % MoS 2 /ZnIn 2 S 4 composite possessed lower adsorption energy and a more delocalized electron cloud, creating more favorable conditions for HMF oxidation. Under optimal conditions, the catalyst achieved 70.2 % conversion of HMF with 92.2 % selectivity toward DFF after 3 h of xenon light irradiation. Radical trapping experiments indicated that superoxide radical (•O 2 − ) were the dominant reactive species driving the transformation. This study highlights the potential of one-step hydrothermally synthesized Z -scheme MoS 2 /ZnIn 2 S 4 heterojunctions for efficient biomass-derived chemical valorization, offering valuable insights for the sustainable production of DFF and related high-value chemicals.
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DOI
高影响因子
MARINE CHEMISTRY
·
2025
·
IF 2.5
Yu Meng,Meng Lv,Xiao-Tong Zhang,Xiao-Yan Cao,Rong Chen,Gui-Peng Yang
The runoff input of mineral particles in coastal areas affects the migration and transformation of nutrients. Organic phosphorus (OP) has attracted much attention due to coastal eutrophication, while the migration under the influence of mineral inputs has not been understood deeply. This study investigated the sorption behavior of an OP compound (Adenosine 5’-monophosphate, AMP) on goethite, kaolin, and two mixtures of the minerals with natural sediment. FTIR spectra and surface acid-base characteristics revealed interactions presented within the mixtures. Sorption kinetics and thermodynamics experiments were carried out through batch methods. The kinetic data were described using a two-compartment first-order equation, and the sorption isotherms were well-fitted by both the Freundlich and Langmuir models. Goethite exhibited a higher sorption ability than kaolin, and the sorption was more sensitive to salinity. The sorption capacity of mineral-added sediments was significantly lower than predicted, particularly for sediments mixed with kaolin, which decreased by 57.4 %. The analysis of OP fractions during sorption revealed an obvious increase in exchangeable or loosely sorbed organic phosphorus (Ex-Po) and iron/aluminium-bound organic phosphorus (NaOH-Po), with NaOH-Po dominating. The sum of Ex-Po and NaOH-Po, as the bioavailable OP, in goethite and kaolin was estimated to be around half of the total sorption amount. Compared to the discrete original ones, the Ex-Po in the sediment with the mineral addition increased while NaOH-Po decreased after sorption, suggesting that the presence of interactions between the minerals and sediment matrix reduced their ability to retain AMP. These findings highlight the significant role of mineral-sediment interactions in altering OP sorption characteristics, with important implications for their biogeochemical fate.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 106
·104398-104406
·
IF 3.289
Cong Zhang,Jingbo Qi,Jing Xing,Si-Fu Tang,Liang Song,Yuanyuan Sun,Chuanhui Zhang,Hongchuan Xin,Xuebing Li
Aqueous phase catalytic upgrading of lignin monomers to hydrocarbons via hydrodeoxygenation (HDO) has been explored using a combination of Pd/C and HZSM-5 catalysts under 2 MPa of H2 (ambient temperature). Model monomers with varying numbers of methoxy groups, including phenol, anisole, guaiacol and 2,6-dimethoxy-phenol, were chosen as lignin model compounds. Mechanistic studies revealed cascade and parallel reaction pathways via hydrogenation and dehydration (hydrolysis) processes, which were catalyzed by Pd/C and HZSM-5, respectively. Hydrogenation was preferred at lower temperature, whereas higher temperature was favorable for the removal of oxygen-containing functional groups. The effect of methoxy groups on the HDO of these monomers was also investigated systematically. Basically, the conversion of multi-substituted monomers was tougher than that of mono-substituted ones, due to steric constraint and the inhibition of the electron-donating hydroxyl group. The selectivities to cyclohexane from phenol and anisole were improved significantly by increasing the temperature to 413 K. However, cyclohexanone was preferably produced over cyclohexane when using model compounds with multi-substituents (guaiacol and 2,6-dimethoxy-phenol), even at temperatures above 513 K. Comparative experiments were also conducted on the HDO of 1,2-cyclohexanediol with or without the presence of phenol, which clearly suggested that the further HDO of guaiacol and 2,6-dimethoxy-phenol was inhibited, probably due to the strong interactions between cyclohexanediol molecules and Brønsted acid sites.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jie Zheng,Anruo Luo,Yan Jin,Baicheng Feng,Jianhua Chen,Xingrong Zhang
In this study, 5-nonyl salicylaldoxime (5-NSA) was synthesized and used as a malachite collector. Its flotation performances and adsorption mechanism were systematically investigated by micro-flotation experiments, contact angle measurements, SEM-EDS, FT-IR, XPS and DFTB+ simulations. The micro-flotation test results showed that 5-NSA produced high recovery of malachite at pH 9.0–10.0, while showing lower collecting power to calcite or quartz. The contact angle analysis results indicated that the hydrophobicity of malachite surface was promoted after the adsorption of 5-NSA. SEM confirmed the adsorption of 5-NSA on malachite surface. FT-IR and XPS analysis results confirmed that O and N atoms in the oxime group were immobilized on malachite surface with Cu through O Cu O and N Cu O bonding. Their adsorption performances on malachite surface were simulated by DFTB+ method, including 5-NSA, tert -butylsalicylaldehyde oxime (TBSA) and salicylaldoxime agents, which analyzed the bond lengths of their covalent bond formation with Cu and speculated their adsorption properties. In general, according to the experimental test and simulation results, 5-NSA showed a stronger power to malachite than TBSA and salicylaldoxime, and only a small dosage can produce a high malachite recovery. The findings of this research will be helpful to improve the comprehensive utilization efficiency of malachite and promote the metallurgy of copper oxide ores.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2017
·
IF 4.055
Tao Liu,Ying-Hui Yu,Han-Zhong Zhang,Wen-Hong Jiang,Jin-Sheng Gao,Guang-Feng Hou
Hydrothermal reactions of rare earth (Nd, Sm, Eu, and Tb) and l- or d-lactic acid are used to construct four pairs of homochiral metal–organic frameworks (HMOFs) with polymetallic building blocks, namely, {[Nd2(L)2(H2O)3]·4H2O}n (1-r)/(1-s) and {[Ln2(L)2(H2O)2]·4H2O}n {Ln = Sm (2), Eu (3), Tb (4)} (n-r)/(n-s). The eight complexes were characterized by single-crystal X-ray diffraction, infrared spectra, elemental analysis, thermogravimetric analysis, electronic circular dichroism (ECD) spectra, and powder X-ray diffraction measurements. The complexes 1–4 featuring a 3D porous metal–organic framework crystallize in chiral space groups, and their chirality is proven by the solid-state ECD spectra. Moreover, the second-harmonic generation (SHG) investigation reveals that the complexes 1-r, 2-r, 3-r, and 4-r have medium SHG eficiencies. The complexes 2, 3, and 4 exhibit relatively high luminescence properties, which could be ascribed to ligand-centered emission. The luminescence of complex 4-r could be quenched by nitrobenzaldehyde, which may be used for molecular sensing and recognition.
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高影响因子
RSC Advances
·
2014
·Vol. 4
·期 41
·21479-21491
·
IF 3.708
Quanyi Wang,Shutao Xu,Jingrun Chen,Yingxu Wei,Jinzhe Li,Dong Fan,Zhengxi Yu,Yue Qi,Yanli He,Shuliang Xu,Cuiyu Yuan,You Zhou,Jinbang Wang,Mozhi Zhang,Baolian Su,Zhongmin Liu
In this work, two kinds of mesoporous ZSM-5 were synthesized successfully using a hydrothermal methodology by utilizing different soft templates, namely, dimethyl octadecyl [3-(trimethoxysilyl)propyl]ammonium chloride ([(CH3O)3SiC3H6N(CH3)2C18H37]Cl, TPOAC) and hexadecyl trimethyl ammonium bromide (C16H33(CH3)3NBr, CTAB). The obtained mesoporous ZSM-5 samples were compared with conventional ZSM-5, and the effects of different surfactant usages during the synthesis of mesoporous ZSM-5 on the physicochemical and catalytic properties were systematically investigated. Multiple techniques, such as XRD, SEM, N2 adsorption techniques, HP 129Xe NMR, 27Al MAS NMR, 29Si MAS NMR, and 1H MAS NMR, were employed for the characterization. Although the synthesized mesoporous ZSM-5 samples had equal surface areas, they presented different relative crystallinities, morphologies, pore-size distributions, micropore–mesopore interconnectivity, framework atom coordination states and acidities. When using these synthesized ZSM-5 samples as catalysts for methanol conversion, the mesoporous ZSM-5 templated with TPOAC exhibited an extremely long catalyst lifespan compared to conventional ZSM-5, while mesoporous ZSM-5 templated with CTAB showed no advantage in prolonging the catalyst lifetime during the reaction. The differences in the catalytic lifespan and the reduction of coke deposition were correlated to the variation of acidity and porosity with the mesopore generation in the ZSM-5 catalysts by the usage of different structure-directing agents. Compared to the mesopore structure-directing agent, CTAB, with the use of TPOAC as the template and part of the Si source, mesoporous ZSM-5 could be synthesized with good mesopore–micropore interconnectivity, which accounted for the improved catalytic performance in the reaction of methanol conversion.
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高影响因子
FOOD CHEMISTRY
·
2018
·
IF 4.946
Meng Dong,Lei Qin,Jia Xue,Ming Du,Song-Yi Lin,Xian-Bing Xu,Bei-Wei Zhu
Evaluation of free amino acids (FAAs) and nucleotides in various food matrices has been a widely studied topic in recent years. Here, a fast and efficient strategy for the simultaneous analysis of 20 FAAs and six 5′-nucleotides, using stable isotope labeling-liquid chromatography coupled with tandem mass spectrometry (SIL-LC-MS/MS) is proposed. The method was validated with respect to selectivity, linearity, limits of detection (LOD) and quantification (LOQ), recovery, precision, and stability. LOQs of most FFAs were lower than 1 ng/mL, and 5′-nucleotides were in the range of 5–20 ng/mL. FAAs and 5′-nucleotides in ten shiitake mushrooms from different cultivate areas were further analyzed. Results showed that the contents of cytidine 5′-monophosphate, adenosine 5′-monophosphate, lysine, threonine, arginine were significantly different. Principal component analysis showed clear discrimination of origins, seasons and species. Thus, the proposed method is suitable for the fast discrimination of species and geographical origins of shiitake mushrooms.
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2018
·Vol. 124
·期 2
·587-601
·
IF 1.515
Wang Tao,Zhang Xinyu,Liu Jun,Liu Hanzi,Sun Baomin
NO conversion using dielectric barrier discharge (DBD) plasma with different catalysts was investigated. Cu/TiO 2 , Cu/Al 2 O 3 , Cu/ZSM-5, Cu/CNTs and Cu/AC catalysts were prepared by incipient wetness impregnation with 4 wt% Cu loaded. BET, SEM, XRD, XPS, H 2 -TPR, NH 3 -TPD were used to measure and evaluate various catalysts. Compared with the plasma only process, the combination of plasma with different catalysts significant improved the NO conversion rate. The highest NO conversion rate of 76% could be achieved with Cu/ZSM-5 catalyst at the energy density of 184 J/L. The results indicate that Cu species over the support ZSM-5 can produce high concentrations of CuO, largest specific surface area, largest amounts of acidity and lowest reduction temperature (209 °C), these factors conducive to plasma-catalyst reaction. Besides, Cu/TiO 2 and Cu/Al 2 O 3 catalysts exhibited excellent NO conversion at the low energy density because of the low thermal stability. After plasma-catalyst reaction, the reducibility of CuO and Cu 2 O over supports decreased and the peak position of acid sites shifted to lower temperature.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Jinshan Shen,Hao Chen,Kequan Chen,Yong Qin,Xiuyang Lu,Pingkai Ouyang,Jie Fu
A Pt–Ni/AC bimetallic catalyst was prepared by atomic layer deposition of Pt nanoparticles on the surface of Ni/AC for base-free oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-furandicarboxylic acid (2,5-FDCA). A comparison of the Pt–Ni bimetallic catalyst with Ni and the Pt monometallic catalyst was demonstrated by X-ray diffraction (XRD), transmission electron microscopy (TEM), and temperature-programmed desorption of CO (CO-TPD). Compared with the Ni/AC and Pt/AC (1.6 wt % Pt) catalysts, the bimetallic Pt–Ni/AC catalyst had a higher activity for the oxidation of 5-HMF to 2,5-FDCA, with only a 0.4 wt % Pt loading. A 97.5% yield of 2,5-FDCA with 100% 5-HMF conversion was obtained after 15 h at 100 °C. A mass-based activity value of 35.8 h–1 was obtained over the Pt–Ni/AC-15ALD catalyst. The combination of Pt with Ni increased the ability of Pt for C═O adsorption and oxidation, thus increasing the activity of the Pt catalyst. Finally, the catalyst showed good reusability for at least four times without any reduction in the catalytic activity.
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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.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hao Zhang,Botao Fan,Rui Li,Qinghu Tang,Futing Xia,Wenhao Fang
The electrocatalytic 5-hydroxymethylfurfural oxidation reaction (HMFOR) has become a clean and fast-response route for synthesizing the sustainable biomonomer. Here, a Mn-doped Ni(OH) 2 catalyst is constructed and enables a 98.9 % yield of 2,5-furandicarboxylic acid and a 99 % Faradic efficiency with a stable durability up to 50 cycles for the alkaline HMFOR. The Mn-Ni(OH) 2 catalyst shows a low onset potential of ca. 1.29 V ( vs. reversible hydrogen electrode, RHE) and achieves a current density of 50 mA cm −2 at only 1.38 V in 1 M KOH, significantly outperforming the vast majority of Ni-based (oxy)hydroxide catalysts reported to date in the literature. The isomorphic substitution of Ni 2+ ions by the coordination unsaturated Mn ions brings about lattice expansions and crystal defects of the nanoflower-shaped Ni(OH) 2 catalyst. The distinctive Mn-doping effect can modulate the electronic structure and also oxygen vacancy formation on Ni(OH) 2 surface. The experimental and theoretical studies systematically unravel that the ingenious catalytic synergism can significantly boost the proton deintercalation feature of Ni(OH) 2 ( i.e. , an improved generation kinetics of the Ni 3+ (OH)O active center) and dramatically promote the adsorption ability of different reactive intermediates on Ni 3+ (OH)O. As a result, HMFOR is greatly enhanced on the as-prepared Mn-Ni(OH) 2 catalyst. The mechanism investigations further evidence that the activation processes of CH 2 OH and HC O groups during HMFOR must require the participations of OH − ions and H 2 O molecules, respectively. This work has clearly tracked the reconstruction process of a Ni electrocatalyst and firstly unlocked the activation behaviors of different functional groups, thus successfully getting deep insights into the real and dynamic catalytic mechanism for the alkaline HMFOR.
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DOI
PubMed
高影响因子
Chinese Medicine
·
2026
·Vol. 21
·期 1
·230
·
IF 7.4
Wang Shasha,Huang Kexuan,Cheng Yuhan,Sun Cheng,Wang Kan,He Qirui,Yin Gang,Tang Decai,Zhang Yu,Tan Xiying
Background Astragali Radix (HQ) and Curcumae Rhizoma (EZ), collectively termed AC, are commonly used as an herb pair in Traditional Chinese Medicine (TCM) for colorectal cancer (CRC). Although AC has been used as an adjuvant to chemotherapy, the molecular basis by which it enhances the efficacy of 5-fluorouracil (5-FU) remains incompletely defined. Methods The antitumor effect of AC alone and in combination with 5-FU was evaluated in a HCT116 xenograft mouse model and in CRC cell lines with different genetic backgrounds. Potential systemic toxicity was assessed using serum biochemical markers. Transcriptomic changes induced by AC were analyzed by RNA sequencing and integrated with network pharmacology and The Gene Expression Omnibus (GEO) (GSE17536, GSE17537, GSE41258, GSE20916). Key targets were validated by Western blotting and immunofluorescence. Cell viability, drug interaction, apoptosis, cell-cycle distribution and DNA damage were assessed using CCK-8 assays, Synergy Finder analysis, flow cytometry, and γ-H2AX staining. Bioavailable AC-derived constituents were characterized by UPLC-QTOF-MS, and candidate active compounds were further evaluated by molecular docking, molecular dynamics simulation, cellular thermal shift assay, and functional validation. Results AC potentiated the antitumor efficacy of 5-FU in vivo and did not exacerbate 5-FU-associated hepatic or renal biochemical toxicity under the tested conditions. In vitro, AC-containing serum extracts inhibited CRC cell viability, induced reversible G2/M-phase arrest, and enhanced 5-FU sensitivity in HCT116, CT26, and HCT15 cells. AC treatment caused limited early apoptosis, whereas delayed apoptosis was observed after prolonged exposure, suggesting that cell-cycle arrest represents the primary early response. RNA-seq and integrative analyses showed that AC suppressed pathways associated with DNA replication, mismatch repair, ribosome biogenesis, and cell-cycle progression. AC downregulated key regulators involved in cell-cycle control, DNA repair, and stress-survival signaling, including PLK1, CDK1, CCNB1, CDC25A, c-JUN, MSH2, BRCA1, and p-AKT. Combination treatment further increased γ-H2AX accumulation and reduced cell-cycle regulatory proteins. Functional validation indicated that c-JUN overexpression partially attenuated AC-mediated 5-FU sensitization, whereas pharmacological AKT inhibition partially mimicked the sensitizing effect of AC. Among the serum-exposed constituents, Demethoxycurcumin and Kumatakenin were identified as bioavailable active compounds that partially recapitulated the effects of AC by inducing G2/M-phase arrest and enhancing the antiproliferative activity of 5-FU. Molecular docking, molecular dynamics simulation, and CETSA supported their target engagement with cell-cycle regulators, particularly CCNB1 and CDK1. Conclusion AC enhances the therapeutic efficacy of 5-FU in CRC by weakening DNA repair-cell-cycle coordination and stress-survival signaling, thereby increasing 5-FU-induced DNA damage and promoting cell-cycle arrest. Demethoxycurcumin and Kumatakenin may represent important bioavailable contributors to this chemosensitizing effect, although the complete AC extract likely acts through multi-component and multi-target mechanisms. These findings provide mechanistic support for the use of AC as an adjunctive strategy to improve 5-FU-based chemotherapy in CRC. Graphical
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高影响因子
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