MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Jiaze Chen,Huijie Xie,Yusen Chen,Dong Guo,Binjie Li,Xuanxuan Sun,Volodymyr Turkevych,Caixia Li,Dehong Chen,Lei Wang,Bin Li
Fenton-like degradation based on iron catalyst have been developed to remove organic pollutants from wastewater. However, iron-based catalysts still face challenges of poor accessibility and stability of active sites. Here, we report a facile and green method for the preparation of Fe x Cu (1-x) @HZSM-5 catalyst using ethylenediamine as an organic ligand to stabilize metal species via a combination of solid-state grinding and steam-assisted crystallization methods without organic templates. Due to the confinement of zeolite ZSM-5 framework and synergistic effect of Fe and Cu bimetals, the optimized Fe 0.8 Cu 0.2 @HZSM-5 catalyst exhibits excellent activity and reusability in the Fenton-like degradation of methylene blue at the neutral condition. Our strategy for fabricating bimetal@zeolite can bring about new thoughts for the preparation of iron-based catalyst with high efficiency for Fenton-like degradation.
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Xudong Wang,Yanyang Wu,Tianyou Wang,Bin Wu,Kui Chen,Lijun Ji
M-cresol and p-cresol, typically produced as mixtures in industrial processes, are crucial chemical intermediates. However, their separation is challenging due to their similar structures and properties. ZSM-5 zeolite has shown potential as an adsorbent for separation, while the performance is yet to be improved. In this study, ZSM-5-F(x) was synthesized via hydrothermal method, incorporating F − ions during the synthesis process. The adsorption behaviour of m-cresol and p-cresol on ZSM-5-F(x) was investigated through static experiments, with ZSM-5-F(8) demonstrating the highest selectivity (9.01). Both ZSM-5-F(0) and ZSM-5-F(8) were characterized using XRD, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. In addition, the introduction of F − ions increased the material's electronegativity, as demonstrated by the change in zeta potential from 53.22 to −45.93 mV. Single-component adsorption of m-cresol or p-cresol on ZSM-5-F(0) and ZSM-5-F(8) respectively were investigated in detail. The adsorption of m-cresol on ZSM-5-F(8) showed a non-monotonic phenomenon with a significant decrease after 0.06 mol/L. The thermodynamic parameters including Δ G , Δ H , and Δ S were calculated accordingly. All the values |Δ G |, |Δ H |, and |Δ S | of both components on ZSM-5-F(8) were greater than those on ZSM-5-F(0), suggesting that the introduction of F − ions facilitated the adsorption. Competitive adsorption experiments on both ZSM-5-F(0) and ZSM-5-F(8) were conducted at 298.2 K. The results indicated that the selectivity α p/m on ZSM-5-F(8) increased with increasing initial concentration and laid between 13 and 14. After seven consecutive regeneration cycles, the selectivity (α p/m ) only decreased to 13. This study suggests that ZSM-5-F(8) could be a promising adsorbent for m-cresol and p-cresol in industrial applications.
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Yanting Zhou,Junchao Zhao,Tengfei Wang,Zhilei Yu,Yangyang Fu,Yong Jiang,Xudong Cheng,Heping Zhang
Despite the exceptional fire-suppressant capabilities of ultrafine dry powder fire extinguishing agents, additional work is essential to improve their overall fire-extinguishing performance. In this investigation, we explored the utility of Fe 3+ loaded ZSM-5 zeolite in enhancing the firefighting capabilities of ultrafine dry powder fire extinguishing agents. The loading of transition metal ions Fe 3+ onto the ZSM-5 zeolite was achieved through the ion solution exchange method. Interestingly, the loading of Fe element on Fe/ZSM-5 zeolite displayed a pattern of initial increase followed by decrease as the ion exchange time lengthened. Furthermore, the loading of Fe element on Fe/ZSM-5 zeolite was found to be influenced positively by the initial molar concentration of Fe 3+ and pH levels. Impressively, under specific working conditions, the prepared Fe/ZSM-5 zeolite demonstrated a substantial Fe element loading of 5.82 %. Incorporation of ZSM-5 zeolite resulted in a 10.01 % enhancement in the fire-extinguishing efficiency of the ultrafine dry powder compared to undoped samples. Moreover, the incorporation of Fe/ZSM-5 zeolite has resulted in an enhancement of fire extinguishing efficiency by 20.45 % (S3), 24.20 % (S4), and 29.04 % (S5) in comparison to S1. These findings contribute to the understanding that the incorporation of Fe/ZSM-5 zeolite significantly enhances the fire extinguishing performance of ultrafine dry powder fire extinguishing agents, with extinguishing efficiency improving with increased Fe element loading.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
Yang Tang,Jie-Mei Chu,Wei Huang,Jun Xiong,Xi-Wen Xing,Xiang Zhou,Yu-Qi Feng,Bi-Feng Yuan
5-Methylcytosine (5-mC), an important epigenetic modification involved in development, can be converted enzymatically to 5-hydroxymethylcytosine (5-hmC). 5-hmC is considered an intermediate of active DNA cytosine demethylation and makes itself serve as an epigenetic mark. 5-hmC content in most mammalian cells is low and the quantification of 5-hmC by liquid chromatography–mass spectrometry (LC–MS) frequently suffers from ion suppression by the presence of unmodified nucleosides. To circumvent this problem, we developed a method to selectively transfer a glucosyl group to the hydroxymethyl moiety of 5-hmC and form a more hydrophilic residue (β-glucosyl-5-hydroxymethyl-2′-deoxycytidine, 5-gmdC) by using T4 β-glucosyltransferase. The more hydrophilic 5-gmdC can be selectively enriched by using NH2-silica via hydrophilic interaction prior to liquid chromatography–tandem mass spectrometry (LC–MS/MS) analysis, which eliminates the ion suppression and significantly improves the detection sensitivity and accuracy. Using this method, we successfully quantified 5-hmC content in genomic DNA of three human cell lines and seven yeast strains. To the best of our knowledge, this is the first report about the existence of 5-hmC in the model organism of yeast. In addition, the contents of 5-hmC in two yeast strains of Schizosaccharomyces pombe are even higher than those of 5-mC, indicating that 5-hmC may play important roles on the physiological functions of yeast.
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2015
·Vol. 145
·期 4
·1080-1088
·
IF 2.307
Liu Wentao,Wang Yanfang,Li Wei,Yang Yan,Wang Ningning,Song Zhanxin,Xia Xiao-Feng,Wang Haijun
Abstract A variety of polyethylene glycol-400-functionalized dicationic acidic ionic liquids (ILs) (PEG 400 -DAILs) were synthesized and tested in the dehydration of fructose. Among these catalysts, hydrogen sulfate anion-based ILs showed the higher catalytic performance in the conversion of fructose. The highest HMF yield of 96.5 % with 100 % consumption of fructose were obtained after 60 min at 110 °C. The effects of catalyst concentration, reaction time, reaction temperature, and solvents were systematically investigated. In addition, the generality of the catalysts was examined by processing inulin and sucrose to HMF with yield of 71.9 and 52.1 % under certain conditions, respectively. PEG 400 -DAILs possess modified physicochemical properties such as low viscosity, strong hydrophilicity and hydrogen bonding with sugars so as to improve activity for the dehydration of fructose into HMF. The used IL catalyst could be separated and recycled repeatedly without significant loss of catalytic activity. The research emphasizes preparation of the novel catalysts combining polymers with functionalized ILs for conversion of renewable biomass. Graphical abstract
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Zhijian Li,Changhui Zhu,Haiyong Wang,Yuan Liang,Haosheng Xin,Song Li,Xiaohong Hu,Chenguang Wang,Qi Zhang,Qiying Liu,Longlong Ma
For the biomass catalytic valorization in the presence of a H2 atmosphere, large amounts of H2O and H2 are necessary to improve the processing efficiency, which resulted in the waste of such generous inputs. As a model reaction, the traditional hydrodeoxygenation of 5-hydroxymethylfurfural (5-HMF) selectively produces 2,5-dimethylfuran (2,5-DMF) under high pressure H2. Meanwhile, the water-gas shift reaction (WGSR) can counteract the harmful CO by simultaneously producing H2 from H2O. The hydrogenolysis of 5-HMF to 2,5-DMF produces H2O because of the hydroxyl group removal. Therefore, adding a trace amount of H2O to initiate 5-HMF hydrodeoxygenation coupled with WGSR to achieve H2O recycling in the reaction process is of great significance but extremely challenging. Herein, we reported a new process for the selective hydrodeoxygenation of 5-HMF to 2,5-DMF coupled with WGSR using a single catalyst, Au/ZrO2. A detailed study showed that the hydrogen species produced in situ by WGSR was used for 5-HMF hydrodeoxygenation to obtain 78.5% of 2,5-DMF yield. The H/H2O cycle in the coupling reactions exhibited a H2 utilization efficiency of 88.2%. Without using external H2, this work provided a new method for 5-HMF hydrodeoxygenation to 2,5-DMF triggered by WGSR and also showed the potential for application in H2O-saving conversion of cellulosic biomass with C–OH or C═O groups to value-added chemicals and fuels.
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Yunchao Feng,Miao Zuo,Ting Wang,Wenlong Jia,Xiaoyu Zhao,Xianhai Zeng,Yong Sun,Xing Tang,Tingzhou Lei,Lu Lin
Production of 5-hydroxymethylfurfural (HMF) from glucose with high yield remains a big challenge. Thereinto, assembling catalysts with outstanding performance is the bottleneck at the current stage. In this study, effective catalysts were synthesized by loading SO 4 2− /ZrO 2 (SZ) on a series of H + zeolites to investigate the catalytic dehydration of glucose into HMF. Among all the catalysts applied, 2-SZ-HM-550 (HZSM-5 with Si/Al molar ratios of 80∼150, calcined at 550 °C) gave the yields of HMF 41.32%, 61.14%, 54.67% and 40.71% in 4 applied reaction systems, respectively. Moreover, HMF with desirable yield was obtained while other carbohydrates were dehydrated catalyzed by 2-SZ-HM-550, such as fructose, sucrose, inulin and starch.
✓ 已验证
DOI
高影响因子
SUPRAMOLECULAR CHEMISTRY
·
2011
·
IF 1.94
Jing Cao,Jun Xiang Feng,Yong Xiang Wu,Xue Qun Pei,Jiao Jiao Yan,Yang Liu,Wen Jie Qin,Xiao Bin Zhang
A novel 15-aza-5-crown ether linked to styryl chemosensory 13-(4-((9H-fluoren-9-ylidene)methyl)-2-nitrophenyl)-1,4,7,10-tetraoxa-13-azacyclopentadecane was designed and synthesised, it would not occur during photoisomerisation under radiation of light but shows special capability of selectively recognising for Sr2+.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Lin-Cong He,Xu-Fang Wang,Chu-Feng Liu,Bei Li,Meng-Fei Luo,Jian Chen
An efficient MnO x /CeO 2 /ZSM-5 catalyst was developed for selective oxidation of diethylamine (DEA) with high N 2 selectivity in a wide temperature window ( Δ T = 140 °C), owing to the existence of oxidation and selective catalytic reduction (SCR) active sites. MnO x species prefer to locate on the surface of CeO 2 compared to ZSM-5, and the presence of CeO 2 is beneficial to form more Mn 4+ species, the active sites for oxidation reaction. The mechanistic investigation suggests that internal SCR of NO x generated from the over-oxidized DEA is the crucial pathway for N 2 generation. The high SCR activity of the MnO x /CeO 2 /ZSM-5 catalyst in oxidation conditions is mainly attributed to the synergistic catalysis of Mn 4+ species and acid sites of ZSM-5, the active sites for SCR reaction. Thus, it has been clearly clarified that addition of CeO 2 and its addition sequence could modulate the surface active sites of MnO x /ZSM-5 catalyst for the selective catalytic oxidation of DEA.
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yixuan Wang,Shijia Fu,Yi Lu,Rongrong Lai,Ziyi Liu,Weixuan Luo,Yuehong Xu
Psoriasis does not respond adequately to the monotherapy, tailoring combined strategies for synergistical treatment remains challenging. We fabricated chitosan/hyaluronan nanogels to co-load methotrexate (MTX) and 5-aminoleavulinic acid (ALA), i.e., MTX-ALA NGs, for a combined chemo-photodynamic therapy for psoriasis. Compared with MTX-ALA suspension, the NGs enhanced the penetration and retention of MTX and ALA through and into the skin in vitro and in vivo ( p < 0.001). NGs enhanced the cellular uptake ( p < 0.001), protoporphyrin IX conversion ( p < 0.001), and reactive oxygen species generation (3.93-fold), subsequently exerted the synergistical anti-proliferation and apoptosis on lipopolysaccharide-irritated HaCaT cells with the apoptosis rate of 78.6%. MTX-ALA NGs efficiently ameliorated the skin manifestations and down-regulated the proinflammatory cytokines of TNF-α and IL-17A in imiquimod-induced psoriatic mice ( p < 0.001). Importantly, MTX-ALA NGs reduced the toxicities of oral MTX to the liver and kidney. The results support that MTX-ALA NG is a convenient, effective, and safe combined chemo-photodynamic strategy for psoriasis treatment.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xiaohui Zhang,Xiaohua Zhang,Jie Zhang,Shuai Ma,Yu Liu,Zhenxing Yue
The medium-permittivity Ca 1- x Sr x La 4 Ti 4 O 15 (CSLT, x = 0.2, 0.4, 0.6, 0.8) ceramics are synthesized by high temperature solid-phase reaction method, and the impacts of Sr 2+ substitution on the microwave dielectric properties and defect behaviors are investigated in depth. X-ray diffraction (XRD) and Raman spectra demonstrate that Sr 2+ successfully incorporates the lattice to form a solid solution . Structure refinement and transmission electron microscope (TEM) indicate the formation of a 5-layer shifted hexagonal perovskite ceramic consisting of AO 3 layers stacked in a “ccchh” fashion. The dielectric constant of the well-sintered CSLT ceramics increases slightly with the increase of Sr 2+ substitution, while the Q × f value fluctuates within a small range of 41,100 GHz–48,750 GHz. Correspondingly, the prominent microwave dielectric properties of the Ca 0.6 Sr 0.4 La 4 Ti 4 O 15 ceramics are ε r = 47.0, Q × f = 48,750 GHz, and τ f = −10.5 ppm/°C. The thermal relaxation behaviors of the defect are systematically explored employing thermally stimulated depolarization current (TSDC) measurements, from which oxygen vacancies and defect dipoles are considered as the main defect types in ceramics. In addition, the ultra-fast discharge time ( t 0.9 = 15 ns) indicates that the CSLT ceramics have distinguished pulse discharge performance, promising for the applications of microwave capacitors.
✓ 已验证
产品关联
DOI
高影响因子
World Journal of Cardiology
·
2025
·Vol. 17
·期 12
·112062
·
IF 2.8
Yu-Bao Zhao,Zhi-Hong Bao,Ya Tu,Xia Qiu,Yin-Lan Bao,Min Su,Hai-Jun Qi,Quan Wan
BACKGROUND Myocardial infarction (MI) occupies a very high mortality and morbidity rate, and the search for effective pharmacological treatments has far-reaching implications for clinical research. AIM To explore the protective effects of Mongolian medicine Agari-5 on rats with MI. METHODS Sprague-Dawley rats were used, and both the Agari-5 and model groups had their coronary arteries clamped to induce MI. Proteomics was used to research the potential mechanism of action while ELISA, hematoxylin and eosin, and Masson’s staining were used to preliminarily investigate the protective impact of Agari-5 on rats with MI. RESULTS The current study has shown that Agari-5 might enhance cardiac function indicators, including echocardiography results of rats and creatine kinase, creatine kinase isoenzyme, and lactate dehydrogenase, in rats that had MI. According to the results of pathological staining, Agari-5 may lessen inflammatory cell infiltration and cardiomyocyte fibrosis, among other things. The proteome analysis revealed that there were 60 distinct proteins in total, four of which were associated with the heart. The expression of PSAT1, PDK1, SMAD4, and SDF2 proteins may be linked to the mechanism of their protective effects. CONCLUSION Potential therapeutic effects of Agari-5 for MI and its mechanism of action may be related to PSAT1, PDK1, SMAD4, and SDF2.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）