ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xuemin Zhong,Peng Yuan,Yanfu Wei,Dong Liu,Dusan Losic,Mengyuan Li
The aerobic oxidation of 5-hydroxymethylfurfural (HMF), a key platform compound derived from biomass, to 2,5-furandicarboxylic acid (FDCA) is a highly important reaction in the production of green and sustainable chemicals. Here, we developed a highly efficient and stable halloysite-supported Pt–Au alloy catalyst for the selective oxidation of HMF to FDCA. The catalyst was synthesized through the organosilane functionalization of halloysite nanotubes, followed by the in situ formation and dispersion of Pt–Au alloy nanoparticles on the internal and external surfaces of nanotubes. The composition, morphology, and structure of the prepared catalyst were characterized. The catalyst with the optimal composition of Pt/Au molar ratio of 1/4 and metal loading of 1.5 wt % exhibited outstanding catalytic activity for the oxidation of HMF to FDCA using O2 as an oxidant with 100% conversion of HMF and 99% selectivity of FDCA. This excellent catalytic performance is mainly attributed to the high dispersion and alloying effects of bimetallic nanoparticles, which promoted the activation of reactants or intermediates and further improved FDCA selectivity. Furthermore, the halloysite-supported Pt/Au bimetallic catalyst showed high stability and reusability. This study provides a promising strategy by combining clay mineral halloysite and bimetallic alloys for developing efficient catalysts with high FDCA selectivity and stability for the oxidation of HMF to FDCA.
研究领域:
催化
·
纳米材料
·
绿色化学
·
可持续化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 22
·26905-26916
·
IF 2.478
Yao Tiantian,Zou Hao,Zhang Jin,Zhou Yi
Constructing a heterojunction to extend the survival time of photogenerated carriers is an effective way to increase the photocatalytic performance of materials. The 2D-2D flower-like DUT-5@Bi 2 WO 6 composite material is obtained via the hydrothermal method for the frist time. The efficiency of Rhodamine B removal based on 30% DUT-5@Bi 2 WO 6 is 87% under visible light for 18 min, which is 4.55 times that of pure Bi 2 WO 6 . RhB-sensitized effect plays a decisive role in enhancing the photocatalytic activity of DUT-5 to RhB under visible light. The results shows that the type I heterojunction is formed between RhB/DUT-5 and Bi 2 WO 6 . The wide contact surface stems from heterojunction can accelerate the separation and transfer of photo-generated charges. Furthermore, the high specific surface area and unique pore structure of DUT-5 provide sufficient active sites for photocatalytic reactions. Thus, the efficient charge transfer and sufficient active sites contribute to the photocatalytic activity. This work provides a new idea for the development of 2D-2D composite materials to degrade organic pollutants under visible light to solve environmental pollution.
研究领域:
环境科学
·
材料科学
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DOI
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.
研究领域:
矿物加工工程
·
材料科学与工程
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Deyu Si,Meihua Zhu,Ronghui You,Yuqin Li,Ting Wu,Tian Gui,Na Hu,Izumi Kumakiri,Xiangshu Chen,Hidetoshi Kita
Aluminum-rich ZSM-5 zeolite membranes are prepared on α-alumina support through organic template free precursor gels by secondary hydrothermal synthesis , microstructure of the membrane through the different Si/Al ratio and alkali metal fluoride synthesis gel are discussed in this work. Alkali metal fluorides have a significant influence on the synthesis of aluminum-rich ZSM-5 zeolite membranes without organic template, which are realized by the synergistic reaction of the “bridging” and “salting-out” effects. Sodium fluoride and potassium fluoride could produce dense and needle-like zeolites layer on the supports by an extremely low Si/Al ratio synthesis gel (Si/Al <10). When the Si/Al ratio of the initial synthesis gel is 18.52, the compact and prismatic ZSM-5 zeolites are fully covered on the supports with sodium fluoride, potassium fluoride or lithium fluoride. There are few of ZSM-5 zeolites could form on the support by cesium fluoride containing synthesis gel.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ACS Applied Bio Materials
·
2024
·
IF 4.6
Yujun Zhang,Peiling Zhang,Yan Lv,Jing Liu,Yiyu Zhou,Zibin Zhang,Jianying Huang
The increasing number of infections caused by pathogenic bacteria has severely affected human society. More and more deaths were originated from Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) infection each year. The potential and excellent bacteriostatic activity and resistance to biofilm formation of pillar[5]arene with different functional groups attract important attention to further study the relationship between antimicrobial activity and cytotoxicity by varying the length of the hydrophobic chain, the number of positive charges, and the hydrophobic/hydrophilic balance of the molecule. In this work, four pyridinium-based cationic pillar[5]arene (PPs) with linear aliphatic chains of different lengths were synthesized. After systematic characterization, their inhibition activities against S. aureus were investigated. It revealed that PP6 (six methylenes in each linker) exhibited excellent inhibition activity against S. aureus (ATCC 6538) with a minimum inhibitory concentration (MIC) of 3.91 μg/mL and a minimum bactericidal concentration (MBC) of 62.50 μg/mL. As expected, PP6 exhibited the strongest antibiofilm ability and negligible antimicrobial resistance even after the 20th passage. A study of the action mechanism of selected PPs on the bacterial membrane depolarization and permeability by transmission electron microscopy (TEM) disclosed that the cationic pyridine groups of PPs inserted into the negatively charged bacterial membranes, thereby leading to membranolysis, cytoplasmic content leakage, and cell death. Importantly, PPs all showed very low toxicity to mammalian cells (L929 and HBZY-1), which provided a significant reference for the construction of hypotoxic antibacterial biomaterials for multiple drug-resistant bacteria based on pyridinium-grafted cationic macrocycles with controllable hydrophobic chain lengths.
研究领域:
微生物学
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药物化学
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材料科学
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DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 152
·期 11
·3427-3436
·
IF 2.936
Xu Siquan,Xing Xinyi,Wu Han,Shi Xian,Zhang Zongqi,Gao Hui
5-Hydroxymethylfurfural (HMF) is a biomass-derived platform compound with great application potential. Herein, the efficient NbW-SBA-15 series catalysts were prepared by incorporating the niobium and tungsten into the pore wall of SBA-15 mesoporous silica. The physico-chemical features of NbW-SBA-15 catalysts with different proportions of niobium and tungsten were analyzed through ICP-AES, Low/Wide-angle XRD, N 2 adsorption–desorption, SEM, TEM, UV–Vis DRS, Raman spectroscopy, NH 3 -TPD, and Py-FTIR technologies. It was discovered that by changing the incorporating ratio of niobium and tungsten in the pore wall, the acidic nature (acid strength, acid density, and acid ratio) of the catalyst was adjusted, which in turn affected the catalytic performance. As the introduction molar ratio of niobium to tungsten is 1:1, the corresponding [1:1]NbW-SBA-15 catalyst occupied the highest acid density and stronger acid sites, showing the best catalytic activity. A desired HMF yield of 64% was obtained under optimal reaction conditions. Furthermore, after five consecutive testing cycles, the performance of [1:1]NbW-SBA-15 catalyst was maintained, confirming its outstanding hydrothermal stability. Graphical Abstract
研究领域:
催化化学
·
生物质转化
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DOI
高影响因子
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2021
·Vol. 95
·期 1
·116-120
·
IF 5.488
Zhu Xin Yi,Yang Xi Nan,Wu Heng,Tao Zhu,Xiao Xin
The interaction between pyridine pillar[5]arene (PyP5) and 2-naphthol with the former as the host molecule and the latter as the guest molecule is studied by fluorescence spectroscopy and NMR techniques, and the results show that PyP5 forms a 1:1 host-guest inclusion complex with 2-naphthol. Although free 2-naphthol has strong fluorescence, it is quenched in 2-naphthol@PyP5. Experiments were conducted with 2-naphthol@PyP5 as a fluorescent probe to detect different anions with results showing that only CO32− causes a significant enhancement of the fluorescence of the fluorescent probe. Due to this high selectivity and high sensitivity, the fluorescent probe 2-naphthol@PyP5 may open up an effective way for the detection of CO32−.
研究领域:
超分子化学
·
分析化学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 21
·7456-7463
·
IF 4.39
Zhen-Li Yang,Yue-Mei Wu,Piao He,Wen-li Cao,Saira Manzoor,Jian-Guo Zhang
The development of green energetic materials is based on environmental friendliness, safety and performance improvement. It is of great significance to design and synthesize new nitrogen rich salts for a new generation of green energetic materials. In the present work, a series of 3-amino-5-hydrazinopyrazole energetic salts comprising energetic anions were synthesized and were characterized using elemental analysis, IR spectroscopy and differential scanning calorimetry (DSC). Compounds 1–5 were further confirmed by single crystal X-ray diffraction and the sensitivities were measured by the standard BAM methods. Additionally, the structure–property relationship was elucidated from the experimental results and theoretical calculations. Energetic salts of 2 and 5 exhibited high heat of formation (5, 1160.06 kJ mol−1), high decomposition temperature (2, 172 °C; 5, 186 °C), excellent detonation performance (2, Dv, 9076 m s−1, P 34.1 GPa; 5, Dv, 8974 m s−1, P 31.9 GPa), moderate sensitivity towards outer stimuli and high nitrogen contents (2, 41.03%; 5, 63.84%). This work increases future prospects for the design of insensitive and novel high-energy green energetic material.
研究领域:
含能材料化学
·
有机化学
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材料科学
·
热分析
·
计算化学
·
晶体学
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 75
·47435-47447
·
IF 3.108
Donglin He,Huiping Zhang,Ying Yan
CuO over ZSM-5 zeolite membrane was prepared by chemical vapor deposition (CVD) for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed bed reactor. Firstly, Cu-ZSM-5/PSSFs catalysts with Cu loading of 2 wt%, 4 wt% and 6 wt% were prepared and characterized by XRD, XPS, SEM, EDS, N2 adsorption–desorption and TPR (H2), respectively. Compared with CuO deposited directly onto PSSFs, the CuO supported on ZSM-5/PSSFs tended to be more regular with smaller crystal size. Then, several parameters affecting H2O2 consumption and phenol oxidation such as reaction temperature, Cu loading, and different supports were investigated in the CWPO of phenol with a high concentration (1 g L−1 phenol and 5.1 g L−1 H2O2). Experimental results revealed that Cu-ZSM-5/PSSFs (6%) showed better activity for the oxidation of phenol than Cu-ZSM-5/PSSFs catalysts with lower Cu loading and CuO/PSSFs with same theoretical loading. A complete reduction of phenol and a high TOC removal around 60% had been achieved over Cu-ZSM-5/PSSFs (6%) at the temperature of 80 °C, feed flow rate of 2 mL min−1 and catalyst bed height of 2 cm. Finally, the possible oxidation pathway of phenol was studied based on the by-products detected by high-performance liquid chromatography (HPLC).
研究领域:
环境科学
·
化学工程
·
材料科学
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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.
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 21
·6437-6443
·
IF 6.177
Xingyu Lu,Ke Qi,Di Wang,Xueya Dai,Wei Qi
2,5-Furandicarboxylic acid (FDCA) is a high-value platform molecule that can replace the fossil derivative terephthalic acid in the synthesis of important chemicals. FDCA can be synthesized from the oxidation of the biomass derivative 5-hydroxymethylfurfural (HMF). In this study, we loaded Cu-based catalysts with different morphologies and chemical states on carbon paper, and it was found that the Cu nanocrystalline/carbon paper catalyst with a thin and scattered dendrite structure (Cu(NSD)/CP) exhibits the best performance for the electrooxidation of HMF (96% yield and 100% selectivity for FDCA), which is attributed to the fact that the Cu0 and Cu1+ species in the catalyst are easily oxidized in situ to Cu2+ species, showing high catalytic activity during the reaction process. This paper highlights the importance of the identification of active sites and the rational design of catalysts based on structure–function relations.
研究领域:
催化化学
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Xue-Dong Xiao,Lin Shi,Li-Hui Guo,Jun-Wen Wang,Xiang Zhang
The supramolecular interaction between the water-soluble pillar[5]arene (WP[5]) as host and dopamine hydrochloride (DH) as guest was studied by spectrofluorometry . The fluorescence intensity of DH gradually decreased with increasing WP[5] concentration, and the possible interaction mechanism between WP[5] and DH was confirmed by 1 H NMR, 2D NOESY , and molecular modelling. Based on significant DH fluorescence, a highly sensitive and selective method for DH determination was developed for the first time. The fluorescence intensity was measured at 312 nm, with excitation at 285 nm. The effects of pH, temperature, and reaction time on the fluorescence spectra of the WP[5]-DH complex were investigated. A linear relationship between fluorescence intensity and DH concentration in the range of 0.07–6.2 μg mL − 1 was obtained. The corresponding linear regression equation is Δ F = 25.76 C + 13.56 (where C denotes the concentration in μg mL − 1 ), with the limit of detection equal to 0.03 μg mL − 1 and the correlation coefficient equal to 0.9996. This method can be used for the determination of dopamine in injection and urine samples. In addition, the WP[5]-DH complex has potential applications in fluorescent sensing and pharmacokinetics studies of DH.
研究领域:
分析化学
·
超分子化学
·
药物代谢
·
生物分析
·
药代动力学
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DOI
高影响因子
危险品化学品经营许可证（带存储）