CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shukai Diao,Tianwen Wang,Wen Kuang,Su Yan,Xiaotian Zhang,Mingxuan Chen,Ying Liu,Aidong Tan,Tianrang Yang,Jianguo Liu
Alkaline water electrolysis (AWE) is a leading “green hydrogen” production technology. Industrial electrodes use alkaline leaching to remove Al from NiAl alloy, creating pores and increasing specific surface area (SSA) but still suffer from poor electrode performance. This study presents a method for fabricating an efficient bifunctional electrode. The process involves creating a porous Ni layer with high SSA on nickel mesh (NM) by reducing NiO, which facilitates the formation of Ni(OH) 2 nanosheets. The resulting Ni/Ni(OH) 2 @NM electrode features a hydrophilic, gas-repellent and highly electrochemically active surface. It achieves low overpotentials for hydrogen and oxygen evolution reactions (164 mV and 337 mV at 100 mA/cm 2 , respectively). The electrolyzer using Ni/Ni(OH) 2 @NM electrodes only requires 1.695 V to achieve 300 mA/cm 2 at 80 °C after a 2000 h durability test. The electrode also demonstrates excellent stability under frequent start-stop cycles, making it well-suited for integration with intermittent renewable energy sources.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Wenke Li,Zhe Cai,Hang Li,Yu Shen,Yongqiang Zhu,Haichao Li,Xubin Zhang,Fumin Wang
One-pot conversion of furfural to the target product γ-valerolactone (GVL) is a challenging and meaningful part of biomass exploitation. Development of heterogeneous catalysts with both Brønsted and Lewis acid properties has proved to be promising and useful because they offer an efficient way to tandem cascade reactions from furfural to GVL. Herein, we successfully synthesized sulfated DUT-67(Hf), a novel bifunctional catalyst, via a post-synthetic modification method. The prepared sulfated DUT-67(Hf) was characterized by XRD, SEM, TEM, N 2 adsorption-desorption, Elemental (N, C, H, S) analyses, situ infrared spectra of pyridine adsorptions, XPS, FT-IR, TG, and NH 3 -TPD. The acidity of the catalysts could be adjusted by submersion in different concentrations of aqueous sulfuric acid, giving 0.01 mol/L sulfuric acid for 0.42 mmol/g acidity to 0.1 mol/L sulfuric acid for 2.16 mmol/g acidity. Sulfated DUT-67(Hf) possessed by 0.06 mol/L aqueous sulfuric acid exhibited optimal catalytic activity and showed an 87.1% yield of GVL under the conditions of 180 °C after 24 h of reaction. Moreover, the mechanism of introducing Brønsted acid sites into DUT-67(Hf) and the better hydrogen donors was also investigated through contrasting experiments.
研究领域:
化学工程
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催化化学
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DOI
高影响因子
Materials Today Bio
·
2025
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IF 10.2
Lei Yu,Wentao Wang,Chang Lv,Qian Chen,Peng Yang,Zhenrong Qi,Haomiao Yu,Ruiqi Cao,Wenhao Li,Yi Qin,Gaoran Ge,Peilai Liu,Lixin Zhu,Houyi Sun,Dechun Geng,Liang Zhang
Osteoporotic bone regeneration poses significant challenges due to the complexity of the condition. Osteoporosis, a degenerative disorder, results from an imbalance in bone homeostasis driven by dysregulation of osteoblast and osteoclast activity. This complicates the treatment of osteoporosis and its related bone injuries in clinical practice. Despite the development of various polymer scaffolds for bone defect repair, achieving effective regeneration in osteoporotic bones—especially when combined with osteoporosis medications—remains difficult. In this study, we designed a drug delivery system composed of mesoporous bioactive glass (MBG) and photo-crosslinked hyaluronic acid methacrylate (HAMA). This system, loaded with the osteogenesis-promoting peptide DWIVA (D5) and the osteoclastogenesis-inhibiting drug alendronate (ALN), is gelled using a light initiator and 405 nm wavelength light. The MBG@D5-Gel complex enables the controlled spatiotemporal release of these agents, markedly enhancing bone regeneration in osteoporotic conditions within ovariectomized rats by inhibiting osteoclastogenesis and bone resorption while promoting osteogenic differentiation and mineralization. This dual-action system synergistically regulates osteoblast and osteoclast activity, optimizing the pathological microenvironment of osteoporosis and facilitating the repair of osteoporotic bone defects. MBG@D5-Gel holds great potential as an effective organic-inorganic hybrid biomimetic implant material for the treatment of osteoporotic bone defects.
研究领域:
生物医学工程
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骨科
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材料科学
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DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 2
·373
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IF 3.164
Xiuhuan Song,Xiaoxiao Zhang,Tianduo Li,Zibiao Li,Hong Chi
A series of hybrid thermoplastic polyurethanes (PUs) were synthesized from bi-functional polyhedral oligomeric silsesquioxane (B-POSS) and polycaprolactone (PCL) using 1,6-hexamethylene diisocyanate (HDI) as a coupling agent for the first time. The newly synthesized hybrid materials were fully characterized in terms of structure, morphology, thermal and mechanical performance, as well as their toughening effect toward polyesters. Thermal gravimeter analysis (TGA) and differential scanning calorimetry (DSC) showed enhanced thermal stability by 76 °C higher in decomposition temperature (Td) of the POSS PUs, and 22 °C higher glass transition temperature (Tg) when compared with control PU without POSS. Static contact angle results showed a significant increment of 49.8° and 53.4° for the respective surface hydrophobicity and lipophilicity measurements. More importantly, both storage modulus (G’) and loss modulus (G’’) are improved in the hybrid POSS PUs and these parameters can be further adjusted by varying POSS content in the copolymer. As a biodegradable hybrid filler, the as-synthesized POSS PUs also demonstrated a remarkable effect in toughening commercial polyesters, indicating a simple yet useful strategy in developing high-performance polyester for advanced biomedical applications.Keywords:bi-functional POSS;hydrophobic modification;thermoplastic polyurethane;mechanical performance
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Energies
·
2025
·Vol. 18
·期 14
·3592
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IF 3.2
Wangchuang Zhu,Xinghua Zhang,Qi Zhang,Lungang Chen,Xiuzheng Zhuang,Longlong Ma
With the continuous consumption of fossil energy and the related environmental problems, clean energy, especially the hydrogen energy-derived water electrolysis, has attracted wide attention. However, as a result of the high energy consumption of water electrolysis and the limitations of single-function catalysts, there is an urgent need for cheap and simple-to-make bifunctional catalysts. In this work, based on the NiFe-LDH that is usually used for OER (Oxygen Evolution Reaction), doping of heteroatoms was carried out and a bifunctional catalyst could be then prepared using biomass as the carbon source. The preparation of catalyst precursors and in situ reduction were performed through the coupling process of hydrothermal and pyrolysis to enhance the electrolytic activity of the catalyst. Results showed that the overpotentials required to reach a current density of 10 mA·cm−2for the HER and OER processes were 305.2 mV and 310.4 mV, respectively, which are superior to the commercial catalysts. In the subsequent characterization, the structural characteristics of the catalyst support and their structure–activity correlation with active metals were systematically investigated by TEM, XRD, and XPS analysis, providing mechanistic insights into the catalytic behavior. The basic catalytic mechanisms of HER and OER were also obtained: the HER process was due to the formation of a Ni3Fe alloy structure during catalyst preparation, which changed the electronic structure of the catalyst, while the OER process was induced by the formation of a NiOOH intermediate. The research results are expected to provide new ideas and data support for the preparation of bifunctional catalysts.
研究领域:
能源催化
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
BioTech
·
2025
·Vol. 14
·期 1
·18
·
IF 3.1
Yao Lu,Qiang Jiang,Yamin Dong,Runzhen Ji,Yiwen Xiao,Du Zhu,Boliang Gao
The GH43 family of glycosidases represents an important class of industrial enzymes that are widely utilized across the food, pharmaceutical, and various other sectors. In this study, we identified a GH43 family glycoside hydrolytic enzyme,Xyaf313, derived from the plant endophytic fungusChaetomium globosumDX-THS3, which is capable of transforming several common ginsenosides. The enzyme function analysis reveals that Xyaf313 exhibits dual functionality, displaying both α-L-arabinofuranosidase and β-D-xylosidase activity. When acting as an α-L-arabinofuranosidase, Xyaf313 achieves optimal enzyme activity of 23.96 U/mg at a temperature of 50 °C and a pH of 7. In contrast, its β-D-xylosidase activity results in a slight reduction in enzyme activity to 23.24 U/mg, with similar optimal temperature and pH conditions to those observed for the α-L-arabinofuranosidase activity. Furthermore, Xyaf313 demonstrates considerable resistance to most metal ions and common chemical reagents. Notably, while the maximum enzyme activity of Xyaf313 occurs at 50 °C, it maintains high activity at room temperature (30 °C), with relative enzyme activity exceeding 90%. Measurements of ginsenoside transformation show that Xyaf313 can convert common ginsenosides Rc, Rb1, Rb2, and Rb3into Rd, underscoring its potential for pharmaceutical applications. Overall, our findings contribute to the identification of a new class of bifunctional GH43 glycoside hydrolases, highlight the significance of plant endophytic fungi as a promising resource for the screening of carbohydrate-decomposing enzymes, and present new candidate enzymes for the biotransformation of ginsenosides.
研究领域:
生物化学
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工业酶学
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药用植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Ke Wu,Lulu Guo,Wei Wang,Zhimin Yang,Haishun Liu
Humidity-temperature dual-functional sensors show great demand in healthcare and archaeology, requiring sensors with high sensitivity, high resolution and high stability. In this work, utilizing the post-coordination strategy, the uncoordinated N atoms in MOF-303 were used as the metal chelate sites to chelate CuCl 2 , and due to the accordion-like morphology, the obtained material shows potential in humidity sensing and temperature sensing. The CuCl 2 -MOF-303 based sensor shows whole range humidity sensing with response of 11.4 at 33 % RH and 56,700 at 95 % RH, 1 % RH of resolution and good long-term stability (>90 days), and excellent temperature sensing performance of high sensitivity (–3.3 %/°C), high linearity (R 2 >0.99) and high resolution (0.3 °C) in the temperature range of 35–38 °C. Furthermore, the application of sensor in healthcare, noncontact sensing and information transmission is verified. This study provides a preliminary exploration for the application of MOFs in humidity-temperature dual-functional sensors.
研究领域:
材料科学
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传感器技术
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生物医学工程
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Wei Liu,Yu-Qing Zhang,Zhen-Lin Dong,Zi-Xuan Chen,Lei Li,Xin-Yuan Zhao,Yang Wu,Yu-Yang Zhang
Graphical Here, the core-shell structure of ZIF-90@ZIF-67 was applied for the first time to catalyze the tandem reaction in Pickering emulsion system, which exhibited excellent catalytic performance with 99.9 % yield. Furthermore, ZIF-90@ZIF-67 has high stability and maintains good reproducibility after five cycles. This work provides a platform for the design of structurally and functionally diverse MOF-based interfacial catalysis for Pickering emulsions. Exploiting advanced solid particles is crucial to the construction of Pickering emulsions catalysis. Recently, metal-organic frameworks (MOFs) have been used as ideal emulsifiers stabilizing Pickering emulsions for interfacial catalysis. Although Pickering emulsions stabilized by core-shell MOFs have significant importance in practical studies, to date there have been very limited reports on this topic. Herein, ZIF-90@ZIF-67, a core-shell material with simultaneous acid-base bifunctionality, was synthesized by seeded epitaxial growth. It was firstly applied as an emulsifier in Pickering emulsions to catalyze the deacetalization-Knoevenagel tandem reaction, which exhibited excellent catalytic properties and achieved extremely high yields. Additionally, ZIF-90@ZIF-67 showed high stability and remained well repeatable after five cycles. This work provides a platform for the design of structurally and functionally diverse MOF-based Pickering emulsions interfacial catalysis.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2025
·
IF 3.5
Hongzhi Wang,Xiangcheng Shen,Weiguo Zhang,Suwei Yao
The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni 0.85 Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni 0.85 Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm −2 for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm −2 for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm −2 at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm −2 and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Baohong Zheng,Lin Ban,Yingxia Nie,Long Chen,Song Yang,Heng Zhang
Against the backdrop of energy crisis and quest for carbon neutrality , efficient utilization of heterogeneous catalysts to facilitate one-pot conversion of low-quality nonedible oils into biodiesel, shows enormous promise for the reduction of carbon footprints and environmental pollution. In this study, an effective heterogeneous catalyst, acid-base bifunctional mesoporous ZnF 2 (MP-ZnF 2 ) was successfully fabricated for biodiesel synthesis from Koelreuteria integrifoliola oil (KIO, acid values of 8.26 mg KOH/g) via facile one-pot process. Meanwhile, systematic characterization showed the large specific surface area (62.9 m 2 /g), abundant mesoporous (12.15 nm), outstanding thermal stability, and plentiful stable acid-base sites (1.22 and 0.56 mmol/g) of MP-ZnF 2 . Consequently, MP-ZnF 2 achieved a high biodiesel yield of 97.15% under moderate conditions (103 °C, 6.2 h, 10.2 wt% catalyst dosages, 29:1 MeOH/KIO molar ratio) optimized by response surface methodology (RSM). More importantly, through the kinetic investigation, a low activation energy of 49.24 kJ/mol explained the reason for its high activity, and the possible reaction mechanism of (trans)esterification was also proposed. In addition, MP-ZnF 2 demonstrated satisfactory reusability (6th cycle, >90%), water resistance (8 wt% water content, 89.25%), and versatility (all yields >90%). According to cost analysis, the price of biodiesel in this work was about 0.64 $/kg. Notably, the as-prepared biodiesel conformed to ASTM D6751 and EN 14,214 standards, indicating great application prospects. It was demonstrated that one-pot transformation of KIO into biodiesel using acid-base bifunctional MP-ZnF 2 contributes to the sustainable development of clean energy.
研究领域:
能源科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Yao Ning,Yuqi Yang,Dongming Shan,Shuxing Mei,Yibai Yan,Linjie Ding,Ying Zhang
Ethylene oligomerization plays an important role in industrial production. However, when taking the traditional non-metallocene catalysts and MOF catalysts for ethylene oligomerization, they typically require methylaluminoxane (MAO), aluminum alkyl, and other cocatalysts, which is neither environmentally friendly nor helpful in reducing production costs. Here, three sulfonic acid-modified MOFs (SA/MIL-101(Cr), UiO-66-NS and MIL-101(Cr)-NS) were prepared and used as catalysts for ethylene oligomerization at room temperature without using any cocatalysts. All of them exhibited excellent catalytic performances (e.g., 10SA/MIL-101(Cr), 21 953 g molCr−1 h−1, with C8 selectivity greater than 70.32%), and their oligomerization activity increased by almost tenfold compared to unmodified MOFs. The presence of Lewis acid (L acid) and Brønsted acid (B acid) sites in modified MOFs is the key to improved performances. In particular, the presence of B acid weakens the role of metal clusters and ligands in MOFs, making it easier for metal centers to bind to ethylene molecules for further oligomerization. This work first demonstrates that bifunctional MOF catalysts can catalyze ethylene tetramerization under mild conditions without cocatalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS SURVEYS FROM ASIA
·
2025
·
IF 2.3
Zhu Mengxuan,Li Hongqing,Wang Xin,Wang Longyang,Wang Rui,Jiang Heng,Jin Changzi
Design of efficient metal-acid bifunction catalysts is of significance for development of hydroisomerization of linear alkanes. In this study, the spatial configurational construction of Pt-ZSM-5 catalytic system was achieved by fabrication of acidic ZSM-5 zeolite and mesoporous silica core-shell composites equipped with controlled location of Pt sites, which aim to explore the effect of functional sites proximity on isomerization reactivity. A series of characterization techniques such as X-ray diffraction, transmission electronic microscopy, N 2 physical adsorption, NH 3 temperature programmed desorption, X-ray photoelectron spectroscopy and so on had confirmed that the synthesized core-shell bifunctional catalysts with different Pt location possessing similar textural, acid and metal properties. In the catalytic hydroisomerization of n -heptane, however, the catalyst with Pt sites locating at acid zeolite exhibits superior n -heptane conversion and isomerization selectivity, which indicates that proximity of active sites at atomic scale may be more conducive to their synergistic effect when the diffusional limitation from zeolitic channel is minimized. These results had presented new direction for the preparation of efficient bifunctional catalysts in hydroisomerization of linear alkanes.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）