Catalysts
·
2025
·Vol. 15
·期 8
·703
·
IF 4
Yitong Zhao,Meng Liu,Yao Ning,Ying Zhang,Zhijie Wu
In our previous work, we fabricated Ni single-atoms within Beta zeolite (Ni1@Beta-NO3−) using NiNO3·6H2O as a metal precursor without any chelating agents, which exhibited exceptional performance in the selective hydrogenation of furfural. Owing to the confinement effect, the as-encapsulated nickel species appears in the form of Ni0and Niδ+, which implies its feasibility in metal catalysis and coordination catalysis. In the study reported herein, we further explored the hydrogen production and olefin oligomerization performance of Ni1@Beta-NO3−. It was found that Ni1@Beta-NO3−demonstrated a high H2generation turnover frequency (TOF) and low activation energy (Ea) in a sodium borohydride (NaBH4) hydrolysis reaction, with values of 331 min−1and 30.1 kJ/mol, respectively. In ethylene dimerization, it exhibited a high butylene selectivity of 99.4% and a TOF as high as 5804 h−1. In propylene oligomerization, Ni1@Beta-NO3−demonstrated high selectivity (75.21%) of long-chain olefins (≥C6+), overcoming the problem of cracking reactions that occur during oligomerization using H-Beta. Additionally, as a comparison, the influence of the metal precursor (NiCl2) on the performance of the encapsulated Ni catalyst was also examined. This research expands the application scenarios of non-noble metal single-atom catalysts and provides significant assistance and potential for the production of H2from hydrogen storage materials and the production of valuable chemicals.
研究领域:
催化化学
·
材料科学
·
氢能
·
石油化工
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongjiang Peng,Yanyu Song,Gongjie Hua,Jinhong Wu,Fuwen Liu,Kuangfei Lin,Cong Lu
Peroxymonosulfate (PMS) activation through non-radical pathways exhibits high efficiency and selectivity for pollutant degradation. However, the complex regulation of catalytic active centers makes the generation of 1 O 2 challenging. In this work, Beta zeolite with uniformly dispersed Al-Ov-Co active sites (Co-Beta zeolite) was synthesized via a simple impregnation method, which exhibits excellent 1 O 2 steady-state generation concentration (2.46 × 10 −11 M) at extremely low doses (0.05 g/L). Compared with the original Co 3 O 4 , Co-Beta zeolite displays significantly enhanced PMS activation efficiency, and the apparent reaction rate constant for degrading tetracycline hydrochloride (CTC) increases by 4.7 times. Pyridine infrared characterization confirms that cobalt ions occupy the Brønsted acid sites of the Beta zeolite and undergo proton exchange with them. Accompanied by the redistribution of electrons during the calcination process, some lattice oxygen in the material is removed to form Al-Ov-Co sites. The proportion of Co 2+ in the Al-Ov-Co sites dramatically increases, thereby ensuring efficient activation of PMS. As PMS is adsorbed onto the Al-Ov-Co sites, the H atom of PMS directly bonds with the O atom in Co-Beta zeolite, while the O atom in PMS forms a bond with Co 2+ . After the H O and S O bonds of PMS are broken, abundant 1 O 2 is produced. In practical application evaluation, Co-Beta zeolite shows satisfactory anti-interference ability, reliable cycling stability and acceptable metal leaching. This work inspires the design of highly-dispersed Co 2+ to promote non-radical pathways for PMS-activated water purification.
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PubMed
高影响因子
Antioxidants
·
2022
·Vol. 11
·期 11
·2267
·
IF 7.675
Hao Luo,Weiwei He,Zhuqing Dai,Zhongyuan Zhang,Yihong Bao,Dajing Li,Ping Zhu
α- and β-carotenes belong to the most essential carotenoids in the human body and display remarkable pharmacological value for health due to their beneficial antioxidant activities. Distinct high α-/β-carotene stoichiometries have gained increasing attention for their effective preventions of Alzheimer’s disease, cardiovascular disease, and cancer. However, it is extremely difficult to obtain α-carotene in nature, impeding the accumulations of high α-/β-carotene stoichiometries and excavation of their antioxidant activities. Herein, we developed a dynamically operable strategy based on lycopene cyclases (LCYB and LCYE) for concurrently enriching α- and β-carotenes along with high stoichiometries inE. coli. Membrane-targeted and promoter-centered approaches were firstly implemented to spatially enhance catalytic efficiency and temporally boost expression of TeLCYE to address its low competitivity at the starting stage. Dynamically temperature-dependent regulation of TeLCYE and TeLCYB was then performed to finally achieve α-/β-carotene stoichiometries of 4.71 at 37 °C, 1.65 at 30 °C, and 1.06 at 25 °C, respectively. In the meantime, these α-/β-carotene ratios were confirmed to result in diverse antioxidative activities. According to our knowledge, this is the first time that both the widest range and antioxidant activities of high α/β-carotene stoichiometries were reported in any organism. Our work provides attractive potentials for obtaining natural products with competitivity and a new insight on the protective potentials of α-/β-carotenes with high ratios for health supply.Keywords:α/β-carotene;lycopene cyclase;carotenoid biosynthesis;antioxidant activity;rational system
研究领域:
生物化学
·
分子生物学
·
合成生物学
·
营养科学
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DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
·
2019
·Vol. 22
·期 1
·197-206
·
IF 2.688
Changwei Li,Xianwang Kong,Lihua Lan,Musa Abubakar Tadda,Dezhao Liu
17β-estradiol (E2) ubiquitously exists in various water bodies with long-term endocrine-disrupting and carcinogenic impacts on wildlife even at the trace level of ng L−1. However, it remains unclear how easy-to-degrade carbon sources alter E2 biodegradation patterns. In this study, E2 biodegradation by Sphingomonas sp. MCCC 1A06484 was investigated with regard to alternative carbon sources. Results showed that the bacterium preferentially utilized glucose, sodium succinate and sodium acetate over E2. Interestingly, the presence of these preferred nutrients increased the E2 removal efficiency by 20.1%. Furthermore, a positive relation (p < 0.05) between the utilization of total organic carbon (TOC) and E2 was found. Using intracellular metabolomics by UHPLC-QTOF-MS, 11 up-regulated and 35 down-regulated metabolites (variable importance > 1, p < 0.05) were identified in the bacterium when cultivated with E2 under various carbon and nitrogen backgrounds. The E2 exposure contributed to metabolism changes of lipid, nucleotide, carbohydrate, amino acid and membrane transport, which were considered to play roles in the E2 metabolism. The up-regulated phosphatidylcholine might act as an indicator during the bacterial degradation of E2. Generally, this study contributes to an in-depth understanding of E2 biodegradation in complex environments with multiple carbon and nitrogen sources.
研究领域:
环境科学
·
微生物学
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PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 8
·1-17
·
IF 1.702
Zeng Anrong,Zeng Anran
In this paper, quaternized β-cyclodextrin–montmorillonite composite (QCD-MMT) was obtained and absorption properties of Cr(VI), methyl orange and p-nitrophenol were studied. QCD was prepared by 2,3-epoxypropyltrimethylammonium chloride and β-cyclodextrin (β-CD). QCD-MMT was obtained by reaction between QCD and montmorillonite suspensions, which could be attributed to the montmorillonite cation ion exchange properties. β-CD cavities of this composite were expected to capture organic molecules through inclusion, while montmorillonite units acted as the adsorption sites for metals. QCD-MMT was characterized by FT-IR, elemental analysis, XRD, SEM-EDX, and TGA. Adsorptions of Cr(VI), methyl orange, and p-nitrophenol were highly dependent on adsorbent dose, initial concentration, temperature, contact time, and pH. Adsorption kinetics of Cr(VI), methyl orange, and p-nitrophenol followed the pseudo-second-order model. Meanwhile, adsorption of Cr(VI) fit better in the Freundlich model, inferring a multilayer adsorption, while the adsorption of methyl orange and p-nitrophenol fit better in Langmuir model, inferring a monolayer adsorption. Thermodynamic analysis showed that the adsorptions were all endothermic process and could be spontaneous at given temperature range, except for Cr(VI), of which adsorption should be at much higher temperature. Overall, QCD-MMT exhibited potential for practical applications in the treatment of both metal ions and organic pollutants.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Zunlong Hu,Peng Hu,Xiulin Wang,Tongtong Wu,Sida Ge,Haodong Xie,Baijun Liu,Shengli Chen,Zhijie Wu
The hydrocracking catalyst is characteristic of bifunctional catalyst mainly requiring metal–acid balance, which includes metal–acid ratio and metal–acid proximity. Here, we screened and clarified the optimal metal–acid balance on 1-methylnaphthalene (1-MN) hydrocracking by adjusting metal–acid ratio (n M /n A ) via physically mixing the γ-Al 2 O 3 supported NiW samples and Beta zeolite with different acidity (denoted as NiW/AB(x) and x presents the molar ratio of SiO 2 /Al 2 O 3 for Beta zeolite). NiW/AB(60) catalyst with a n M /n A of 0.40 showed the highest BTX selectivity (14.4 %) at a 1-MN conversion of 76.6 %, suggesting an optimal site balance between the metal sulfide site and medium-strong acid sites ( ca . 1:2.5). Also, four different metal–acid proximities with centimeter, millimeter, micrometer and nanoscale distances were compared. The nanoscale proximity enabled the highest BTX selectivity (19.6 %) as compared to the microscale (14.4 %), millimeter scale (12.4 %) and centimeter scale (7.1 %) catalysts, confirming that the selectivity of BTX benefited from the fast diffusion for transporting reaction intermediates between metal and acid sites. Thus, we realized a n M /n A of 0.40 and a nanoscale site proximity for improving the reactivity and selectivity of 1-MN hydrocracking. This work not only presents an elegant showcase of achieving the synergistic effects of bifunctional catalyst, but also provides a rational approach for enhancing the catalytic performance of hydrocracking and beyond.
研究领域:
催化
·
化学工程
·
石油化学
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DOI
高影响因子
Food Chemistry-X
·
2026
·
IF 9.2
Chun Hu,Chunyu Li,Weinong Zhang,Junbo He,Yanpeng Zhang,Lijuan Han
This study investigated the influence of peanut protein/sodium alginate (PP/SA) complex and oleogel-to-hydrogel ratio on the structure, mechanical properties and stability of carnauba wax/β-sitosterol-based bigels. The results indicated adding SA increased PP mean particle size from 88.1 to 395.2 and 729.6 nm, and absolute zeta-potential from 38.5 to 53.0 and 60.5 mV, and improved its surface hydrophobicity. Additionally, at 40% and 50% oleogel, SA addition was shown to improve the performance of PP bigels in water holding capacity, elastic modulus (G′), viscous modulus (G″), textural properties (hardness, springiness, chewiness and gumminess), as well as physical and freeze-thaw stability. Notably, the bigels with 50% oleogel exhibited the most compact structure and optimal functional properties. However, at 60% oleogel, the PP bigels declined in texture parameters, rheological properties and stability, making the positive effects of SA negligible. These findings provide a theoretical foundation for utilizing PP/SA bigels as potential spreadable sauce substitutes
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Meng Liu,Caixia Miao,Peng Xiao,Zhijie Wu
The direct conversion of methanol, a cheap and readily available feedstock, into value-added methyl acetate (MA) is a promising route. Considering the MA formation mechanism is complex, the design of highly selective catalysts is a huge challenge. Herein, we report a Cu@Zr-Beta catalyst, encapsulated Cu metal clusters within Zr-Beta zeolite by an in-situ two-step hydrothermal method, which exhibits high dispersion of Cu species and strong metal-support interaction between Cu and framework Zr species. The formation rate of MA using the Cu@Zr-Beta catalyst is as high as 2.84 mol kg cat -1 h −1 with a methanol conversion of 8.7 % and a MA selectivity of 55.8 % at 240 °C, which outperforms comparison catalysts. Experimental and characterization studies confirm that the electronic interactions between the encapsulated Cu species and Zr atoms not only enable the production of abundant and stable Cu + species but also promote the synergistic effect between Cu + and framework Zr species, thus accelerating the conversion of methanol to MA. In-situ FT-IR and reaction results show that the Cu 0 site is responsible for the dehydrogenation of methanol to CH 2 O*, which then moves to Cu + -Zr(OSi) 4 site and couples with CH 3 O* to form CH 3 CHO*, and finally produces MA through C-O coupling with another CH 3 O*.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Haoran Gu,Hongyi Tian,Xinxu Yuan,Jingbin Lu,Haolin Li,Ke Zhang,Hanxiao Yan,Shuaiwen Yi
To address the low power output issue of Betavoltaic Batteries in practical applications, this paper proposes a novel isotope beta radiation energy conversion and storage system integrating a GaAs-based Betavoltaic Batteries with a low self-discharge lithium metal battery utilizing flake graphite. This system enables simultaneous collection, conversion, and storage of beta radiation energy. In experiments, we fabricated a lithium metal battery employing flake graphite as the cathode, lithium metal as the anode, and LiFSI in DME electrolyte supplemented with 4-n-pentyl-4′-cyanobiphenyl(5CB) additive. This battery was then connected to the GaAs-based Betavoltaic Batteries. Experimental results demonstrate successful energy harvesting from the Betavoltaic Batteries alone, which effecttively powered an LCD display.
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高影响因子
Particuology
·
2026
·
IF 4.7
Ziyuan Qiao,Jianbin Huang,Xiaoyuan Qin,Jindong Qu,Jian Zhang
Beta zeolite serves as a crucial catalyst for the direct one-step synthesis of lactide from lactic acid, yet its application encounters persistent challenges including prolonged synthesis duration and excessive crystal ripening, which substantially compromise the efficient and high-quality production of zeolites at industrial scale. To address this, we developed a rapid hydrothermal synthesis route at 180 °C, employing an inexpensive bio-derived polysaccharide, guar gum, as a crystal growth modulator. By systematically optimizing key parameters (guar gum/SiO 2 ratio, aging temperature/duration, crystallization time), we successfully tailored the zeolite's texture. The introduction of guar gum effectively suppressed Ostwald ripening, yielding Beta zeolite with significantly reduced primary crystal size (<100 nm) and developed intercrystalline porosity within a remarkably short period of 8 hours. Compared to a rapidly synthesized counterpart without guar gum, the optimized catalyst exhibited a substantially higher specific surface area (586 vs. 384 m 2 g –1 ) and a mesopore population centered at 20–60 nm. In the conversion of lactic acid to lactide, this nano-structured catalyst delivered a markedly higher lactide yield of 79.2%, a 51% improvement over the control sample (52.5%). Gel permeation chromatography and thermogravimetric analysis confirmed that the tailored particle architecture shortened diffusion paths, effectively mitigating oligomer overpolymerization and coking. This work provides a facile and scalable strategy for controlling zeolite crystal growth at the nanoscale, demonstrating the significant impact of particle morphology engineering on catalytic process efficiency.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 32
·18308-18319
·
IF 3.049
Mengying Wei,Yuanyuan Liu,Zifeng Pi,Kexin Yue,Shizhe Li,Mingxin Hu,Zhiqiang Liu,Fengrui Song,Zhongying Liu
Alzheimer's disease (AD) has become one of the major diseases endangering the health of the elderly. Clarifying the features of each AD animal model is valuable for understanding the onset and progression of diseases and developing potential treatments in the pharmaceutical industry. In this study, we aimed to clarify plasma metabolomics and neurotransmitter dysfunction in the process of AD model rat induced by amyloid beta 25-35 (Aβ 25-35). Firstly, Morris Water Maze (MWM) test was used to investigate cognitive impairment in AD rat after 2, 4 and 8 weeks of modelling. Based on this, the effects on levels of AD-related enzymes and eight neurotransmitters were analyzed. And plasma metabolomics analysis based on ultra high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) was used to research the metabolic disturbances in the process of AD rat. The results shown the injury on the spatial learning ability of AD rats was gradually aggravated within 4 weeks, reached the maximum at 4 weeks and then was stable until 8 weeks. During 8 weeks of modeling, the levels of enzymes including β-secretase, γ-secretase, glycogen synthase kinase-3β (GSK-3β), acetyl cholinesterase (AchE) and nitric oxide synthase (NOS) were significant increased in the plasma of AD rats. The neurotransmitter dysfunction was mainly involved in γ-aminobutyric acid (GABA), acetyl choline (Ach), glutamic acid (Glu), 5-hydroxytryptamine (5-HT), dopamine (DA) and norepinephrine (NE). 17 endogenous metabolites correlated with AD were successfully detected in the metabolomics analysis. These metabolites were mainly involved in fatty acids, sphingolipids, and sterols metabolisms, vitamin metabolism, and amino acid metabolism. These metabolites might be the potential biomarkers that correctly mark different stages of AD. The study on peripheral plasma indices reflecting the process of AD laid the foundation for understand the pathophysiology of AD and find an effective and radical cure. And the rules of endogenous metabolic disorder in AD rats also have a certain guiding significance for the future study of food–drug interactions at different stages of AD.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Meng Xia,Zheng Shen,Shaoze Xiao,Bo-yu Peng,Minyan Gu,Wenjie Dong,Yalei Zhang
The direct catalytic transformation of raw lignocellulosic biomass into valuable chemicals is of great significance for sustainable production. This work reports the combination of a transition metal chromium with tin in Beta zeolites to efficiently catalyse the conversion of Miscanthus into lactic acid with a yield of 33.4% and a selectivity of 53.2%. On the basis of experiment and kinetic studies , chromium and tin were beneficial for the retro-aldol condensation and isomerization of carbohydrates, respectively. The acidity of the catalyst was investigated based on important insight into the synergetic catalytic mechanism. The strong Lewis acidity possessed by the transition metals was remarkably advantageous for catalysing the retro-aldol fragmentation reaction, while the relatively weak Lewis acidity of the tin species was considered a dominant factor in the isomerization reaction. The coupling of multifunctional active sites provided a new director for the transformation towards lactic acid formation.
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高影响因子
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