ACS Applied Nano Materials
·
2025
·
IF 5.5
Haocheng Zhai,Baoshan Wu,Shoaib Muhammad,Qihui Sun,Hanrui Tian,Yifan Liu,Panfeng Zhao,Chunhong Mu,Nasir Mahmood,Xian Jian
An ideal microwave absorption material involves multilevel precise regulation and construction at multiple scales, which remains a great challenge. For the first time, we develop a host–guest self-assembling strategy via the entrapment of fullerene C60 molecule guest in a zeolitic imidazolate framework-67 (ZIF-67) host to design the hierarchical structure for a high-performance microwave absorber covering the molecular scale, nanoscale, and microscale synergistic effects. Typically, the two-dimensional orientation growth of microscale ZIF-67 precursors in solution is achieved by introducing C60 molecules. After the accurate pyrolysis process, Co nanoparticles derived from C60@ZIF-67 are embedded into ultrathin carbon flake (CF) substrates, favoring uniformity, size diminishment, and surface stability. These as-synthesized uniformly dispersed C60/Co/CF composites possess advantages of dual dielectric and magnetic loss functions, exhibiting the great microwave absorption properties with a minimum reflection loss of −58.03 dB and the effective absorption bandwidth of 5.94 GHz. This proposed host–guest self-assembling strategy has great potential for the synthesis of other metal–organic framework materials in the field of microwave absorption.
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高影响因子
Pharmaceuticals
·
2024
·Vol. 17
·期 4
·489
·
IF 4.3
Hao Wang,Chenxuan Zheng,Fanyu Tian,Ziyao Xiao,Zhixiong Sun,Liye Lu,Wenjuan Dai,Qi Zhang,Xuefeng Mei
Curcumin (CUR) is a natural polyphenolic compound with various pharmacological activities. Low water solubility and bioavailability limit its clinical application. In this work, to improve the bioavailability of CUR, we prepared a new co-crystal of curcumin and L-carnitine (CUR-L-CN) via liquid-assisted grinding. Both CUR and L-CN have high safe dosages and have a wide range of applications in liver protection and animal nutrition. The co-crystal was fully characterized and the crystal structure was disclosed. Dissolution experiments were conducted in simulated gastric fluids (SGF) and simulated intestinal fluids (SIF). CUR-L-CN exhibited significantly faster dissolution rates than those of pure CUR. Hirshfeld surface analysis and wettability testing indicate that CUR-L-CN has a higher affinity for water and thus exhibits faster dissolution rates. Pharmacokinetic studies were performed in rats and the results showed that compared to pure CUR, CUR-L-CN exhibited 6.3-times-higher AUC0–tand 10.7-times-higher Cmax.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Jing Tang,Tao Hu,Nali Li,Yanli Zhu,Jie Li,Shengbiao Zheng,Jiahao Guo
Electrochemical determination of luteolin is vital to food industry owing to its bioactive properties such as anti-viral, anti-ulcer. However, bare electrode of traditional electrochemical sensors generally have narrow linear range and low sensitivity, which sets limit on their practical application. Accordingly, a new nano-architecture fabricated with Ag doped CoNi-bimetal metal–organic frameworks (Ag-CoNi-MOF) is developed as a material for electrochemical determination of luteolin. The introduction of Ag to three-dimensional (3D) flower-like hierarchical structure greatly increases specific surface area and electrical conductivity, which subsequently provides more excellent active sites for luteolin oxidation. Under optimal conditions, Ag-CoNi-MOF sensor presents a broader linear response to luteolin concentration of 0.002 – 1.0 μM with the detection limit as low as 0.4 nM (S/N = 3). Ag-CoNi-MOF has good anti-interference according to compared amperometric current response of luteolin within different organic analytes and metal ions. Finally, the sensor platform is implemented directly to determine luteolin in human urine for evaluation of its practical application. In general, Ag-CoNi-MOF sensors fabricated perform larger linear range with high sensitivity and anti-interference properties, which can be used as a potential material for electrochemical determination of luteolin.
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高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 21
·4610-4617
·
IF 5.686
Yifei Yang,Linsen Zhou,Jun Chen,Ruizhi Qiu,Yunxi Yao
Graphical Highly dispersed Pt clusters supported on TiN substrates favor the formation of highly reactive dual sites. Molecular O 2 dissociatively adsorbs on the Ti−Ti bridge sites to form titanium oxynitride (TiN x O y ) skin and the oxygen atom binding on Ti sites readily react with the adjacent CO adsorbed on Pt to attain the catalytic cycle. The interfacial synergistic effect between Pt and TiN results in superior performance in the low-temperature CO oxidation. The metal-support interfacial synergistic catalysis allows the competitive reaction steps to occur in close proximity at different sites, thus decreasing the activation barrier and improving the catalytic efficiency. Combining the structural characterization, reactivity assessments and density functional theory (DFT) calculations, it is found that highly dispersed Pt clusters on TiN substrates favor the formation of Pt−TiN interfacial dual sites, which are highly reactive for the low-temperature CO oxidation with an apparent activation energy as low as 38.7 kJ mol −1 , much less than that on the traditional Pt/TiO 2 or Pt/SiO 2 catalysts. At low temperature, the surface sites of Pt are saturated with CO adsorption due to its high adsorption energy and the molecular O 2 dissociatively adsorbs on the Ti sites to form the titanium oxynitride (TiN x O y ) skin with a low barrier of 0.1 eV. The O atoms binding on Ti sites readily react with the adjacent CO molecules adsorbed on the perimeter of Pt clusters to attain a catalytic cycle with a reaction barrier of 0.5 eV. The interfacial synergistic effect between Pt and TiN is the origin of the low temperature CO oxidation activity on the metal-nitride catalysts.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yangqin Gao,Guoqing Yang,Yanjie Dai,Xuli Li,Jianfeng Gao,Ning Li,Ping Qiu,Lei Ge
Co-substituted LaFeO3 was electrodeposited on the surface of BiVO4 as a co-catalyst to enhance the water splitting performance. Compared to bare BiVO4, the BiVO4/Co-LaFeO3 composite photoanode shows a water oxidation photocurrent of 3.4 mA/cm2 at 1.23 V versus reverse hydrogen electrode, accompanied by a notable cathodic shift in the onset potential for 300 mV. Combined optical and electrochemical characterizations show that the solid/electrolyte charge transfer efficiency of BiVO4 are dramatically improved by the incorporation of Co-substituted LaFeO3. From the surface kinetic study of charge carriers by intensity-modulated photocurrent spectroscopy, a suppressed surface recombination rate constant is observed and the enhanced photoelectrochemical water splitting performance observed in the BiVO4/Co-LaFeO3 photoanode is attributed to the surface passivation effect of Co-substituted LaFeO3.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Nengwen Gao,Wei Fan,Zhi-Kang Xu
Protein separation and purification is important in biotechnology and food processing industries. Ceramic membranes have shown great potentials for this task. But membrane fouling remains a barrier to their widespread application due to the irreversible adsorption of protein onto the membrane. In this work, one-step co-deposition of dopamine (DA) and diglycolamine (DGA) was conducted on the ceramic membranes for fabricating protein-resistant surfaces. CuSO 4 /H 2 O 2 was used as a trigger to shorten the deposition time and to improve the deposition efficiency. The effect of DA/DGA mass ratio on the membrane structures and properties was studied by FESEM, FTIR, XPS and contact angle measurements. The results indicate that the optimal DA/DGA mass ratio in the co-deposition solution is 1:4. The modified membranes show improved hydrophilicity and negatively charged property. In dynamic protein filtration, these ceramic membranes exhibit a higher permeate flux, a higher water flux recovery, and a lower water flux reduction compared to the original membrane. Moreover, the antifouling property of the modified membrane is preserved after the membranes are treated with high speed water scouring. As a result, this one-step co-deposition method is a simple and effective way to prepare durable fouling-resistant ceramic membranes for protein removal.
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高影响因子
Polymers
·
2021
·Vol. 13
·期 3
·365
·
IF 4.329
Yi Li,Guoyong Huang,Cong Chen,Xue-Wei Wei,Xi Dong,Wei Zhao,Hai-Mu Ye
Big spherulite structure and high crystallinity are the two main drawbacks of poly(butylene succinate) (PBS) and hinder its application. In this work, a new type of copolyester poly(butylene succinate-co-butylene acetylenedicarboxylate) (PBSAD) is synthesized. With the incorporation of acetylenedicarboxylate (AD) units into PBS chains, the crystallization temperature and crystallinity are depressed by excluding AD units to the amorphous region. In contrast, the primary nucleation capability is significantly strengthened, without changing the crystal modification or crystallization kinetics, leading to the recovery of total crystallization rate of PBSAD under the same supercooling condition. The existence of specific interaction among AD units is found to be crucial. Although it is too weak to contribute to the melt memory effect at elevated temperature, the interaction continuously strengthens as the temperature falls down, and the heterogeneous aggregation of AD units keeps growing. When the aggregating process reaches a certain extent, it will induce the formation of a significant amount of crystal nuclei. The unveiled nucleation mechanism helps to design PBS copolymer with good performance.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Min Zhao,Yihui Li,Ziang Zhao,Yuan Lyu,Wei Lu,Hejun Zhu,Yunjie Ding
Mn-doped spinel oxides CoAl 2 O 4 marked as CMA-m (m = Co/Mn atom ratio) herein were synthesized and evaluated for the first time as supports of Co-based Fischer-Tropsch synthesis (FTS) catalysts. HAADF-STEM images showed that Mn doping caused more crystal defects on the surface of CMA-m grains, which may provide more attachment sites for cobalt loading, leading to much smaller Co 0 particle size of 15Co/CMA-m than that of 15Co/CoAl 2 O 4 . Data of H 2 /CO chemisorption showed that the interaction of highly dispersed Co 0 with lattice Mn-doped CMA-m grain has a promotive effect on CO adsorption capability. FTS evaluation results demonstrate that 15Co/CMA-20 showed the highest CO conversion, C 5+ selectivity and C 5+ STY, benefiting from its high Co 0 dispersion and CO chemisorption capability as a result of suitable Mn doping into the lattice of CoAl 2 O 4 , which was confirmed very different from the influence of impregnated Mn oxide over CoAl 2 O 4 .
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Naiwen Liang,Yangfan Li,Yutong Meng,Fan Zhang,Wenqiang Zhu,Jiang Yin,Yahui Yang,Hui Wang,Lishan Yang
Silicon (Si)-based materials have been identified as next-generation preferred anode materials owing to their ultra-high specific capacity, environmental friendliness and low price. However, the defects in Si-based materials ( e.g., the large volume change with unstable solid electrolyte interface during repeated lithiation/delithiation processes and low intrinsic conductivity), will significantly destroy the integrity of electrode structure and get slow dynamic performance, resulting in a fast capacity fading. Herein, we prepared various silicon‑aluminum‑copper dendrites (named SCD-1/2/3) via a two-step displacement dealloying process, which was devoted to simultaneously improving structural instability, low ionic/electronic conductivity of Si crystals. Therefore, the SCD-2 anode possessed an initial Coulombic efficiency of 80 % and exhibited a superior capacity of 1851.7 mA h g −1 at 1 A g −1 after 100 cycles. This paper provides a simple method to gain the Si anodes with high initial Coulombic efficiency, relieved volume expansion and long cycling life.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zhiguo Yang,Xingtai Chen,Qiuying Chen,Jiayi Qu,Yujun Guo,Kaiwen Zhou,Tianren Wang,Davoud Dastan,Xiaoning Wang,Feifei Wang,Xiaoming Tan,Xi-Tao Yin,Xiaoguang Ma
In this work, In 2 O 3 nanospheres were synthesized using urea as a carbon template and modified with Co ions. The synthesized materials were characterized using various instruments to obtain information about the elemental composition and morphology of the materials. The results showed that Co ions replaced the lattice position of In ions and synthesized nanospheres aggregated from 20 nm particles. The results of gas sensitivity tests on all the samples showed that the response to 50 ppm n-butanol at 250 °C reached 540 when Co was doped up to 5 at%. In comparison, the sensor showed very low response to benzene gas with good selectivity. The high response of the sensor to n-butanol is due to the increase in vacancy oxygen content and redox reactions due to the multivalent nature of Co ions. The article concludes with a detailed analysis of the sensing mechanism.
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高影响因子
CATALYSIS COMMUNICATIONS
·
2019
·
IF 3.674
Xiulun Sun,Xinjie Liu,Rongmei Liu,Xueying Sun,Anran Li,Wen Li
We reported a new and facile synthesis route to prepare polyaniline (PANI) nanowire@Co-Fe LDHs nanosheets in two steps. The PANI@Co-Fe LDHs has excellent OER activity with a small overpotential of 261 mV at the current density of 10 mA·cm −2 and a small Tafel slope of 67.85 mV·dec −1 . The PANI@Co-Fe LDHs also has long-term performance and stability. The excellent electrocatalytic performance of the catalyst depends on the good electrical conductivity of PANI and the effect of the two-dimensional (2D) layered structure of Co-Fe LDHs. The work opens a new application for energy storage and conversion.
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高影响因子
iScience
·
2023
·
IF 5.8
Zhixin Li,Yan Zhang,Qianqian Yang,Jindong Wu,Zhi Ren,Fengzhan Si,Jing Zhao,Jiean Chen
Hydrogen is one of the most promising future energy sources due to its highly efficient energy storage and carbon-free features. However, the energy input required for a hydrogen production protocol is an essential factor affecting its widespread adoption. Water electrolysis for hydrogen production currently serves a vital role in the industrial field, but the high overpotential of the oxygen evolution reaction (OER) dramatically impedes its practical application. The formaldehyde oxidation reaction (FOR) has emerged as a more thermodynamically favorable alternative, and the innovation of compatible electrodes may steer the direction of technological evolution. We have designed Au-Vo-NiO/CC as a catalyst that triggers the electrocatalytic oxidation of formaldehyde, efficiently producing H 2 at the ultra-low potential of 0.47 V (vs. RHE) and maintaining long-term stability. Integrated with the cathodic hydrogen evolution reaction (HER), this bipolar H 2 production protocol achieves a nearly 100% Faraday efficiency (FE).
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高影响因子
危险品化学品经营许可证（带存储）