Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 24
·6449-6459
·
IF 6.367
Zhige Zhang,Guofeng Zhao,Han Bing,Jiawei Zhong,Haoran Yuan,Jun Xie,Yong Chen
The efficient utilization of renewable biogas has attracted ever-increasing interest in the past few decades. Ni–Ce1−xZrxO2 supported on monolithic SiC-F (named Ni–Ce1−xZrxO2/SiC-F) is developed and applied in biogas reforming. Monolithic Ni–Ce1−xZrxO2/SiC-F catalysts were comprehensively characterized by ICP-AES, XRD, SEM, HR-TEM, CO2-TPD, etc. The promotional roles of Ce1−xZrxO2 in coke elimination as well as CO2 activation were deeply analyzed via in situ CH4-TPSR/CO2-TPO and in situ H2-TPR/CO2-TPSR. Ni–Ce1−xZrxO2/SiC-F exhibits satisfactory catalytic activity and ability to inhibit sintering and coke-deposition due to (a) the homogeneous dispersion of Ni nanoparticles (NPs) and (b) the strong interaction between Ce1−xZrxO2 solid solutions and Ni NPs. At 900 °C and a weight hourly space velocity (WHSV) of 24 000 mL gcat−1 h−1, an excellent CH4/CO2 conversion of 90/92% was initially achieved over the Ni–Ce1−xZrxO2/SiC-F catalyst, followed by a slight decrease after 150 h, but remained basically stable for the next 250 h.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Jie Zhang,Chao Wei,Tongkang Sun,Xiaoping Wang,Jingyu Ran,Zuotai Zhang,Wenbo Li
Gypsum is an environmentally friendly, healthy, and low-cost building material. However, its poor water resistance significantly limits its application in the construction field. In this study, octa(heptadecafluorodecyl) polyhedral oligomeric silsesquioxane (F-POSS) is synthesized as a hydrophobic agent and applied to gypsum-based flat panels via a simple brush-coating process to construct a hydrophobic coating. The microstructure, water contact angle, and abrasion resistance of the resulting hydrophobic coating on gypsum substrates are systematically characterized. The results show that, compared with the unmodified gypsum board (CA = 85.27°), the hydrophobicity of the gypsum substrate is significantly improved after surface modification, with the contact angle increasing to 135.8°. Notably, after abrasion testing, the hydrophobicity does not deteriorate but instead increases by 7.2%, reaching a contact angle of 145.67°. To further elucidate the underlying mechanism, 3D surface profilometry is employed to characterize the surface roughness and topographical complexity of the gypsum boards before and after hydrophobic modification. These results demonstrate that the prepared hydrophobic material exhibits promising application potential for enhancing the water resistance of gypsum-based materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Fayu Wu,Xinru Tong,Zhuo Zhao,Jianbo Gao,Yanwen Zhou,Peter Kelly
The morphology and properties of the transparent SnO 2 :F (FTO) films, deposited by RF magnetron sputtering at varying oxygen flows from 0∼3sccm, were examined. For FTO films deposited with 0∼1sccm O 2 , the polar unsaturated (101) planes were the preferred orientation, resulting in resistivity values as low as 10 −3 Ω cm, and the transparency of 86.5% in the visible range. The saturated (110) orientation planes associated with {101} facets formed knee twin crystallites for the FTO film prepared at 2sccm O 2 . Further increases of O 2 led to severe mis-orientation of the crystals. The average transparency in the visible range increased up to 95%, but these FTO films were hardly conductive due to the oversupply of O 2 . The optical band gaps became wide at first and then narrow again as the increases of the oxygen flow rates.
研究领域:
材料科学
·
薄膜技术
·
光电子学
✓ 已验证
DOI
高影响因子
Acta Biomaterialia
·
2024
·
IF 9.4
Qingliang Yang,Xuhui Zhou,Bang Lou,Ning Zheng,Jiale Chen,Gensheng Yang
Despite the booming progress of anticancer nanomedicines in the past two decades, precise tumor-targetability and sufficient tumor-accumulation are less successful and still require further research. To tackle this challenge, herein we present a biomolecular motor (F O F 1 -ATPase)-embedded chromatophore as nanorobot to efficiently overcome biological barriers, and thoroughly investigate its chemotactic motility, tumor-accumulation ability and endocytosis. Chromatophores embedded with F O F 1 -ATPase motors were firstly extracted from Thermus thermophilus, then their properties were fully characterized. Specifically, two microfluidic platforms (laminar flow microchip and tumor microenvironment (TME) microchip) were designed and developed to fully investigate the motility, tumor-accumulation ability and endocytosis of the chromatophore nanorobot (CN). The results from the laminar flow microchip indicated that the obtained CN possessed the strongly positive chemotaxis towards protons. And the TME microchip experiments verified that the CN had a desirable tumor-accumulation ability. Cellular uptake experiments demonstrated that the CN efficiently promoted the endocytosis of the fluorescence DiO into the HT-29 cells. And the in vivo studies revealed that the intravenously administered CN exhibited vigorous tumor-targetability and accumulation ability as well as highly efficient antitumor efficacy. All the results suggested that F O F 1 -ATPase motors-embedded CN could be promising nanomachines with powerful self-propulsion for overcoming physiological barriers and tumor-targeted drug delivery. Statement of significance In this study, we demonstrated that F O F 1 -ATPase-embedded chromatophore nanorobots exhibit a strong proton chemotaxis, which not only plays a key role in tumor-targetability and accumulation, but also promotes tumor tissue penetration and internalization. The results of in vitro and in vivo studies indicated that drug-loaded chromatophore nanorobots are capable to simultaneously accomplish tumor-targeting, accumulation, penetration and internalization for enhanced tumor therapy. Our study provides a fundamental basis for further study on F O F 1 -ATPase-embedded chromatophore as tumor-targeting drug delivery systems that have promising clinical applications. It offers a new and more efficient delivery vehicle for cancer related therapeutics.
研究领域:
生物医学工程
·
肿瘤学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chang Jiang,Linzhao Ma,Guo Tian,Longxiang Jiang,Hongzhi Xiao,Qianbiao Du,Hao Li
Novel spinel-type Li 2 Mg 2 Ga 2 Ti 3 O 12 ceramics were prepared by the solid-state method. Rietveld refinement revealed that the Li 2 Mg 2 Ga 2 Ti 3 O 12 ceramics possess a cubic spinel structure with the F d 3 ‾ m ( 227 ) space group. Raman spectrum analysis indicated that the Q × f and FWHM of ceramics exhibit an inverse relationship. According to the P-V-L theory, the Ti-O bond has the highest percentage of contribution to both of bond ionicity and lattice energy, indicating a significant impact on ε r and Q × f , respectively. The Li 2 Mg 2 Ga 2 Ti 3 O 12 ceramics showed the best microwave dielectric properties ( ε r = 15.72, Q × f = 69,633 GHz, and τ f = −20 ppm/°C), sintering at an optimum temperature of 1200 °C. Additionally, a dielectric resonance antenna, on the basis of Li 2 Mg 2 Ga 2 Ti 3 O 12 ceramics was designed and simulated.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Moke Zhou,Bin Tang,Zhe Xiong,Xing Zhang,Shuren Zhang
In this study, the crystal structures and microwave dielectric properties of the Y 3 Al 5 O 12 garnet (YAG) doped with Magnesium (Mg) were investigated. The samples were prepared by a method that the isostatic pressing technique was introduced into the conventional preparation of microwave dielectric ceramics . From XRD patterns of resulted compound, we see Y 3 Al 5−x Mg x O 12–1/2x ( x = 0–0.045) samples form a solid solution with MgO. The lattice parameters of the Y 3 Al 5−x Mg x O 12–1/2x samples have been refined by the Rietveld method, and the unit cell volume of samples swell up slightly as the x value increases. The SEM images demonstrate that the porosity in the system has been effectively eliminated and the values of the relative density significantly increase due to the addition of Mg 2+ , which is conducive to the improvement of Q × f value. The TEM results present the high crystallinity of Y 3 Al 5−x Mg x O 12–1/2x samples. The Raman spectra study illustrates the relationship between the vibrational FWMH values corresponding to the internal loss and the Q × f value. Finally, the Q × f value has been dramatically promoted from 133,209 GHz at x = 0–218,168 GHz at x = 0.035.
研究领域:
材料科学
·
陶瓷学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2015
·Vol. 22
·期 17
·13077-13082
·
IF 2.828
Yang J.,Li X. D.,Meng W. J.,Lu S. Y.,Chen T.,Yan J. H.,Buekens A.,Olie K.
In this study, simulated fly ash containing CuO/CuCl 2 was heated at 350 °C in a flow of N 2 and also in a nitrogen flow containing 10 vol% H 2 , to evaluate the influence of hydrogen adding on dioxin formation. The total polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) output derived from the CuO sample under N 2 and 10 % H 2 was 7.382 and 0.708 ng/g, respectively. As for CuCl 2 , it was 589 and 46.1 ng/g, respectively. The results show that the hydrogen adding has a good inhibition effect on PCDD/F formation; the inhibition rate was higher than 90 % for PCDD/Fs. HCl and NH 3 were detected by Gasmet in the flue gas; the probable inhibition mechanism of hydrogen reaction was proposed, based on our measurements and others’ researches.
研究领域:
环境科学
·
化学工程
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR RESEARCH
·
2025
·
IF 3.4
Lv Changshun,Wang Qingshuang,Li Zhaoxin,Jiang Xue,Liu Tianhui,Xu Xiaoru,Feng Xiangru
Chitosan-based pluronic thermo-sensitive hydrogels represent a class of biomaterials characterized by their favorable biocompatibility and exceptional thermo-sensitive properties. The purpose of this study was to investigate their potential as carriers for embedding α-Mangostin (α-M), a bioactive compound derived from mangosteen peel, with the aim of inhibiting methicillin-resistant Staphylococcus aureus (MRSA). During the synthesis process, chitosan (CS), tannic acid (TA), pluronic F-127 (F127), and pluronic F-68 (F68) were combined to form the thermo-sensitive hydrogel, into which α-M was physically incorporated through crosslinking (designated as CTFF@α-M). We are very interested in the results obtained during the research process. The results of fluorescence imaging in small animals showed that CTFF extended the residence time of α-M in the body from 3 to 9 days, improved the bioavailability of α-M, and achieved the goal of sustained drug release. In vitro antibacterial experiments showed that CTFF@α-M (30 mg/mL) had an inhibition rate of 79.69% against MRSA, which was higher than CTFF@amoxicillin (AM) (5 mg/mL) increased by 71.68%. This study is expected to provide new insights into the integration of biomaterials and natural therapy, and emphasize the therapeutic potential of thermosensitive hydrogels and α-M in antibacterial treatment, especially in the fight against MRSA infection. Graphic In this study, a CTPP hydrogel was prepared using a physical cross-linking method, and α-M was encapsulated to create the CTPP@α-M drug-loaded hydrogel. Various characterization techniques, including SEM, FT-IR, and XRD, were employed to confirm its physicochemical properties. The hydrogel exhibited excellent water solubility, swelling capacity, sustained release characteristics, and biocompatibility, with the ability to transform into a semi-solid gel at 37 °C. In vitro experiments demonstrated that the CTPP@α-M hydrogel showed a powerful inhibitory effect on MRSA, exhibiting strong resistance to antibiotic resistance. Infection experiments using a mouse model confirmed that CTPP@α-M not only accelerated wound healing but also significantly reduced bacterial counts at the wound site. Moreover, the CTPP@α-M group significantly decreased the expression of pro-inflammatory cytokines while increasing the levels of anti-inflammatory factors, indicating its promising anti-inflammatory properties. Collectively, these data suggest that CTPP@α-M is a highly effective antibacterial thermo-sensitive hydrogel with excellent performance.
Diagram of the preparation of protocol CTFF@α-M and the treatment process of bacterial infection wounds
研究领域:
生物材料
·
药学
·
抗菌治疗
·
伤口修复
·
纳米医学
·
高分子科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 3
·1098
·
IF 4.927
Zhe Liu,Hong Wang,Zhu Chen,Ying Ye,Yuwei Wang
Chiral cholesteric molecular tweezer 7d was synthesized and its influences on changes in the ultraviolet (UV) and fluorescence spectra of various anions were investigated. The results displayed that molecular tweezer 7d selectively recognized F−ions in dimethyl sulfoxide with a detection limit of 5.14 μmol/L, while other anions had little interference. On this basis, a method for the rapid detection of F−ions by host molecular tweezer 7d was established, and the naked-eye detection of F−was realized through the unique yellow color of the complex solution. According to the determination of F−ions in real food samples, it was proved that the established method had good application prospects in F−ion detection.Keywords:cholesteric molecular tweezer;fluoride ions;naked-eye detection;specific recognition;food samples
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 92
·75333-75340
·
IF 3.84
Qingqing Wang,Xiusheng Zhang,Yunlong Xu,Dong Liu,Hui Dong,Yang Zhang
A series of Ni and F ion doped LiMn2O4 composite cathode materials are synthesized via a sol–gel method with citric acid as the chelating agent. The morphology and structure of LiNixMn2−xO4−yFy were characterized by XRD, SEM, EDS and the electrochemical performance was tested and characterized by CV and EIS. The results showed that Ni and F ions were uniformly dispersed in the lattice without changing the structure and morphology of LiMn2O4. LiNi0.03Mn1.97O3.95F0.05 exhibits an excellent electrochemical performance among all the samples, and delivers an initial discharge capacity of 120.3 mA h g−1 at 1C and with a retention of 94.5% (25 °C) and 80.4% (55 °C) after the 100th cycle respectively. The results demonstrated that the dual-doping of Ni and F ions in lithium manganate can prevent the manganate from dissolving in the electrolyte and enhance the cycling performance at elevated temperatures, exhibiting excellent performance at different discharge rates.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 6
·1417
·
IF 3.1
Chen Zheng,Xu Han,Fangfang Sun,Yue Zhang,Zihang Huang,Tianyi Ma
Aqueous supercapacitors have occupied a significant position among various types of stationary energy storage equipment, while their widespread application is hindered by the relatively low energy density. Herein, N/F co-doped carbon materials activated by manganese clusters (NCM) are constructed by the straightforward experimental routine. Benefiting from the elevated conductivity structure at the microscopic level, the optimized NCM-0.5 electrodes exhibited a remarkable specific capacitance of 653 F g−1at 0.4 A g−1and exceptional cycling stability (97.39% capacity retention even after 40,000 cycles at the scanning rate of 100 mV s−1) in a neutral 5 M LiCl electrolyte. Moreover, we assembled an asymmetric device pairing with a VOxanode (NCM-0.5//VOx), which delivered a durable life span of 95% capacity retention over 30,000 cycles and an impressive energy density of 77.9 Wh kg−1. This study provides inspiration for transition metal element doping engineering in high-energy storage equipment.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·
IF 2.3
Yue Lu,Ming-Hua Duan,Xue Zhao,Yang Zhang,Yu Yang,Rui Xu,Ya-shuai Kang,Zi-Lin Wang,You-Zhi Zhang,Chang-Wei Li
Six previously unreported papulacandins, namely pestiorosins A–F (1–6), were isolated from the fermentation products of the fungus Pestalotiopsis rosea YNJ21 isolated from the fruitbody of Amanita exitialis. The structures of these compounds, along with a known compound called pestiocandin (7), were determined using MS, NMR data, and modified Mosher's method. All compounds exhibited significant antifungal activity against Candida albicans, with MIC values ranging from 0.06 to 2.00 μg/mL. In terms of cytotoxicity assays, compounds 3 and 6 demonstrated moderate inhibitory activity against human breast cancer MCF-7 cells with IC50 values of 24.50 and 16.83 μM, respectively. On the other hand, compound 7 displayed similar levels of inhibitory activity against mice microglial BV2 cells with an IC50 value of 24.51 μM.
研究领域:
微生物学
·
药物化学
·
天然产物研究
✓ 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）