RARE METALS
·
2022
·Vol. 41
·期 7
·2292-2304
·
IF 6.318
Zhang Le-Xi,Zhao Ming-Mei,Yin Yan-Yan,Xing Yue,Bie Li-Jian
Comprehensive consideration of structural and electronic sensitization is of significant importance for rational design and assembly of high-performance gas sensors based on metal oxides. In this work, hierarchically mesoporous ZnO nanosheets are synthesized via a hydrothermal method followed by calcination. Material characterization reveals polycrystalline feature of these ZnO nanosheets rich in mesopores and defects. Gas sensing performance of as-synthesized ZnO nanosheets was systematically investigated, taking formaldehyde as probe molecules. Compared with commercial ZnO nanoparticles, ZnO nanosheets exhibited enhanced formaldehyde sensing properties, including lower operation temperature, higher sensitivity, faster response, and smaller detection limit. Notably, the response ( S = 227.4) of ZnO nanosheets to 200 × 10 –6 formaldehyde is about 17 times larger than that of ZnO nanoparticles ( S = 13.5). Excluding effects of grain size and surface area, enhanced sensing properties, especially response value, are credited in large part to synergistic actions of surface defects, grain boundaries, as well as unique structural advantage of ZnO nanosheets. Furthermore, this work offers a guideline for boosting performance of metal oxide-based gas sensors via surface defect control and grain boundary construction. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 7
·3135-3145
·
IF 1.754
Zhang Hao,Xi Hailing,Lin Xiaoyan,Liang Lili,Li Zhanguo,Pan Xunhai,Luo Xuegang
Abstract Conventional water-based detergents cannot remove radioactive contamination on the surface below 0 °C. In order to solve this problem, a biodegradable antifreeze foam, containing the antifreeze, the chelating agent and the surfactant in the low pH complex system, has been developed with the small molecule lauryl alcohol (LA) as the foam stabilizer. The developed foam being with short decontamination time which is easy to use and collect, can significantly reduce the amount of radioactive waste. The foam has good stability and decontamination efficiency as low as − 10 °C. The stabilization mechanism of LA on foam was studied. At the range of from 0 to − 10 °C, the decontamination rates of simulated radioactive cesium (Cs) and strontium (Sr) pollution are all above 90% on surfaces with different roughness such as glass, stainless steel, ceramic tile, marble and paint. Graphic Abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 10
·1798-1809
·
IF 2.909
Yu Qi,Liu Chaofan,Nie Weicheng,Chen Ping,Xue Yanan,Tang Yiming
A kind of reduced graphene oxide hollow microspheres loaded with FeCo alloy (AirRGO@FeCo) was synthesized by oil-in-water emulsification technology and high-temperature calcination process. By controlling the concentration of GO aqueous solution, five kinds of hollow microspheres with different RGO contents were synthesized. The diameter of the synthesized hollow microspheres was 4–6 μm, and the thickness of the spherical wall was 0.1–1 μm adjustable. As the concentration of GO aqueous solution is 6 mg/ml, the AirRGO@FeCo exhibits excellent electromagnetic wave absorption properties with an optimal reflection loss value reaching up to − 73.47 dB at 13.75 GHz and a broad effective bandwidth (lower than − 10 dB) of 7.23 GHz (10.77 to 18 GHz) at a thickness of 2.4 mm. The synergistic effects of dielectric loss and magnetic loss mechanisms as well as excellent impedance matching characteristics and strong attenuation characteristics make AirRGO@FeCo hollow microspheres obtain high efficient microwave absorption capacity. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 9
·5163-5176
·
IF 6.123
Zhang Sufeng,Luo Jin,Du Min,Zhang Fengjiao,He Xinning
Currently, the commercial polyolefin-based separators suffer from inferior electrolyte absorption capability and poor thermal stability, leading to unsatisfactory electrochemical performance and severe safety hazards for lithium-ion batteries (LIBs). Herein, a high-performance zeolitic imidazolate framework-8@bacterial cellulose (ZIF-8@BC) composite separator was fabricated via in-situ synthesizing ZIF-8 on BC nanofibers followed by filtration process. The ZIF-8 particles served as micro-spacers to prevent the dense packing of BC nanofibers during drying and significantly improved the porosity from 54.6 (pure BC separator) to 73.2% (composite separator). Combining the exceptional electrolyte affinity and well-developed porous structure, the as-prepared ZIF-8@BC composite separator displayed high electrolyte uptake (340.5%) and good electrolyte wettability, which brought about superior ionic conductivity (1.12 mS cm −1 ) compared to commercial polypropylene separator (0.38 mS cm −1 ). These synergistic advantages eventually endowed the battery using ZIF-8@BC separator with excellent rate capability and cycling performance. Furthermore, the ZIF-8@BC separator showed suitable mechanical strength and outstanding thermal resistance, which ensured higher safety during battery operation. Accordingly, the ZIF-8@BC composite separator is a promising candidate for next-generation LIBs with both enhanced performance and high safety. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 5
·1-13
·
IF 3.061
Wang Huixin,Sun Ling,Wang Shihao,Li Yuyang,Jin Xin,He Wenzhan,Liu Jie,Zhu Ping,Dong Chaohong
A novel phosphorus-nitrogen-silicon-calcium alginate flame-retardant system was successfully prepared, and it was employed on the surface of polyester fabrics by the surface coating method. The scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDX) were applied to analyze and determine the surface morphology and elemental composition of uncoated and coated polyester fabrics. Obviously, it was observed that the flame-retardant system was coated on the surface of polyester fabrics, and the processed sample generated a dense intumescent char layer after burning. The flame retardancy of uncoated and coated polyester fabrics was characterized by the vertical flammability test (VFT) and limiting oxygen index (LOI) test. Compared with the original fabrics, the optimal coated polyester fabrics were not accompanied by a melt-dripping phenomenon during the combustion process, their LOI value increased from 19.2 ± 0.2% to 32.5 ± 0.3%, and the damage length was also reduced to 6.5 ± 0.2 cm. Simultaneously, thermogravimetric analysis (TGA) and cone calorimetry test (CCT) confirmed that the flame-retardant system changed the thermal degradation process of polyester fabrics and showed a good smoke suppression efficacy. Furthermore, the flame-retardant mechanism of optimal coated polyester fabrics in the gas phase and the condensed phase was effectively proved by the FTIR of char residue and TG-FTIR analysis.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 5
·1-8
·
IF 3.061
Quan Hongping,Zhen Xuele,Wu Yang,Duan Wenmeng
Studying the thickening mechanism of non-crosslinked self-thickening polymer (ADDA) is of great significance for plugging high permeability channel and reducing reservoir heterogeneity. ADDA was synthesized from acrylamide, octadecyl dimethyl ammonium chloride, N-(3-(dimethylamino)propyl)methacrylamide and 4-acryloylmorpholine. The changes of apparent viscosity and hydrodynamic radius of ADDA acid solution were studied by simulating the acid rock reaction process. The hydrophobic joint strength and hydrophobic joint structure in the acid rock reaction process of ADDA acid solution were characterized by UV spectrum and environmental scanning electron microscopy (ESEM), and the self-thickening mechanism of ADDA acid solution in the acid rock reaction process was obtained. The results show that the apparent viscosity of ADDA acid solution increases monotonically with the acid rock reaction process, showing good self-thickening ability and high temperature resistance. Compared with the traditional in-situ crosslinking acid, ADDA acid solution avoids the secondary damage caused by the addition of crosslinking agent. Calcium chloride produced in the reaction process increases the polarity of the solution, is conducive to the intermolecular binding of ADDA polymer, and increase the apparent viscosity macroscopically. With the progress of the reaction, the hydrophobic combination strength of acid solution increased, and the hydrophobic combination between polymer molecules formed a three-dimensional network structure.
✓ 已验证
产品关联
DOI
高影响因子
AAPS PHARMSCITECH
·
2022
·Vol. 23
·期 4
·1-16
·
IF 4.026
Gu Zhengqing,Xue Yuanyuan,Li Shuang,Adu-Frimpong Michael,Xu Ying,Yu Jiangnan,Xu Ximing,Zhu Yuan
Diosmetin (DIOS) is a functional compound with poor water solubility, bad permeability, and crystal form. Self-microemulsifying drug delivery system (SMEDDS) was an effective formulation to overcome these shortcomings. In this study, liquid SMEDDS was prepared using Capmul® MCM C8 EP/NF, Cremophor EL, and PEG 400 (2:5.6:2.4, w/w/w) as excipients. Then, the novel technology of electrospray solidified liquid SMEDDS and prepared solid SMEDDS for inhibiting crystallization. Polyvinyl pyrrolidone (PVP) was used as carrier to construct DIOS-loaded solid SMEDDS, with polyethylene oxide (PEO) contributing to the formation of regular sphere in the process of spinning. The particle size of solid SMEDDS (194 ± 5 nm) was much bigger than of liquid SMEDDS (25 ± 1 nm), while DIOS-loaded solid SMEDDS showed greater dissolution rates in pH 1.2 and pH 6.8 media through in vitro drug release study. The solid nanoparticles were smooth and uniform from the graph of a scanning electron microscope (SEM). The graph of a transmission electron microscope (TEM) showed that small droplets were loaded in the matrix. Furthermore, DIOS was encapsulated by matrix in amorphous state via differential scanning calorimetry (DSC) and attenuated total reflection Fourier transform infrared (ATR-FTIR). The crystalline of DIOS was not formed in solid SMEDDS due to the characteristic peaks of DIOS disappeared in X-ray diffraction (XRD) pattern. Therefore, the oral bioavailability of DIOS improved significantly compared with liquid SMEDDS (4.27-fold). Hence, solid SMEDDS could improve the solubility and bioavailability of DIOS, through transfer of the state of crystalline to amorphous by electrospray technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11430-11442
·
IF 4.682
Xu Jun,Zhang Zixiang,Nie YongJia,Liu Yanxia,Fan Yue,Zhao Wenpeng,Feng Xianqi
Self-healing materials can autonomously heal injury like organism, which have attracted increasing attention from academics and industry engineers. However, the mechanical property and self-healing ability of the self-healing material is hard to be reconciled. Here, we report a simple approach to fabricate fast self-healing materials with high mechanical strength and improved triple shape memory effect by incorporation of nanoclay into a polymer matrix. The nanocomposite was prepared by in situ polymerization of poly(ethylene glycol) 400 methyl ether acrylate (mPEG-acrylate) and acryloylmorpholine (ACMO) in the presence of nanoclay. The thus obtained composite exhibits remarkable mechanical properties of an optimistic maximum tensile strength of ~ 8.9 MPa, and high healing efficiency of ~ 99.6% can be achieved after healing for only 1 min at room temperature. This strategy provides insights for the preparation of high-strength, multi-shape memory and fast self-healing composites. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
NPG Asia Materials
·
2022
·Vol. 14
·期 1
·1-10
·
IF 10.761
Wen Guo-Yu,Zhou Xing-Long,Tian Xiao-Yu,Xie Rui,Ju Xiao-Jie,Liu Zhuang,Faraj Yousef,Wang Wei,Chu Liang-Yin
Pigmentary coloration can produce viewing angle-independent uniform colors via light absorption by chromophores. However, due to the limited diversity in the changes of the molecular configuration of chromophores to undergo color change, the existing materials cannot produce a wide range of visible colors with tunable color saturation and transmittance. Herein, we propose a novel strategy to create materials with a wide visible color range and highly tunable color saturation and transmittance. We fabricated a hydrogel with poly (acrylamide- co -dopamine acrylamide) networks swollen with Fe 3+ -containing glycerol/water in which the covalently crosslinked polyacrylamide backbone with pendant catechols can ensure that the hydrogel maintains a very stable shape. Hydrogels containing adjustable catechol-Fe 3+ coordination bonds with flexible light-interacting configuration changes can display a wide range of visible colors based on the complementary color principle. The catechol-Fe 3+ complexes can dynamically switch between noncoordinated and mono-, bis- and tris-coordinated states to harvest light energy from a specific wavelength across the whole visible spectrum. Therefore, these hydrogels can be yellow, green, blue, and red, covering the three primary colors. Moreover, color saturation and transmittance can be flexibly manipulated by simply adjusting the Fe 3+ content in the hydrogel networks. The versatility of these smart hydrogels has been demonstrated through diverse applications, including optical filters for color regulation and colorimetric sensors for detecting UV light and chemical vapors. This proposed smart hydrogel provides a universal color-switchable platform for the development of multifunctional optical systems such as optical filters, sensors, and detectors.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 6
·2931-2942
·
IF 2.961
Zhu Shiling,Chen Susu,Zhang Hao,Yu Wenxing,Tian Yuanhao,Hu Xiaolin,Hussain Shahid,Lin Liyang,Chen Wei,Xu Chaohe
Vanadium pentoxide (V 2 O 5 ), as a common supercapacitor electrode material, has unsatisfactory electrochemical performance due to its low conductivity and ionic diffusion rate, especially its specific capacitance and rate capability, which limits its practical use. In this work, V 2 O 5 rich in oxygen vacancies is successfully prepared by a controllable two-step reduction method. A variety of advanced characterization techniques, especially X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectra, have been used to qualitatively monitor changes in oxygen vacancy content. Compared with the untreated hydrated V 2 O 5 nanosheets, the oxygen vacancy V 2 O 5 (Vö V 2 O 5 ) has a larger specific surface area (4.002 m 2 g −1 ); besides, its specific capacitance (619.5 F g −1 in 1 A g −1 ) being not only better than that of V 2 O 5 without oxygen vacancy treatment (308.0 F g −1 in 1 A g −1 ) but also its cycle stability being improved (70.7% capacity retention after 1000 cycles), it is possible to develop high-performance supercapacitors by using it as an electrode material.
✓ 已验证
产品关联
DOI
高影响因子
AAPS PHARMSCITECH
·
2022
·Vol. 23
·期 4
·1-10
·
IF 4.026
Liu Xia,Zhang Mengying,Tian Yuxin,Liu Ruijia,Wang Yunfei,Guo Feifei,Gong Yanling,Yan Meixing
Luteolin (Lu) is a kind of flavonoid that has been proved to treat non-alcoholic fatty liver disease by alleviating intestinal microbiota disorder. In this study, luteolin was coated with methoxy poly(ethylene glycol)–poly(dl-lactide-co-glycolic acid) (mPEG-PLGA) using an emulsion solvent evaporation method, and the optimum preparation process was determined by a single-factor experiment combined with response surface methodology (RSM). Methacrylic acid-methyl methacrylate (1:2) copolymer (Eudragit S100) was then used to coat the surface of Lu/mPEG-PLGA nanoparticles. The physical parameters of Eudragit S100-coated Lu/mPEG-PLGA nanoparticles (Lu-NPs), such as appearance, particle size, potential, particle size distribution and drug release, and stability in vitro, were evaluated. In addition, its cytotoxicity in vitro , pharmacokinetics, tissue distribution, and toxicity in vivo were also studied. The results showed that the prepared Lu-NPs had uniform particle size distribution, high encapsulation efficiency, and good stability. Normal colonic epithelial cells showed good tolerance to Lu-NPs. After oral administration, the blood concentration of luteolin peaked at 8 h, and the main tissue distribution was within the colon, confirming its colon-targeted profile. Safety assessments also indicated that no significant changes were observed in main organs after administration of Lu-NPs. The use of Eudragit S100-coated Lu/mPEG-PLGA nanoparticles is a new strategy for colon-targeted delivery of luteolin that encourages luteolin to fulfill its role in the colon. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 13
·6900-6913
·
IF 4.682
Yan Yuanjiu,Wang Ruoheng,Maimaitituersun Mieralimu,Sun Huajun,Liu Xiaofang
BiFeO 3 nanoflakes (BFO NFs) were synthesized via a facile hydrothermal route. The crystal structure, morphology, specific surface area and optical properties of the flakes were characterized by X-Ray Diffraction (XRD), Brunner–Emmet–Teller measurements (BET) and UV–vis Diffuse Reflectance Spectrum (UV–vis DRS). The results showed that the thickness and diameter of BFO NFs are 100–150 nm and 1.0–1.2 μm, respectively. Moreover, the results of UV–vis DRS indicated that BFO NFs exhibits good response to the visible light and the bandgap was calculated to be 2.2 eV according to the Kubelka–Munk theory. The photo-Fenton performance of BFO NFs was obviously enhanced due to the piezoelectric effect for the degradation efficiency of Rhodamine B (Rh B) (10 mg L −1 ) within 60 min and greatly elevated from 72 to 97%. The intermediate active species of ·O 2− and ·OH were detected by radical capture experiments and Electron Spin Resonance (ESR). The possible catalytic mechanism was proposed based on the above experiments results. In previous researches about photo-Fenton reaction, the piezoelectric properties of BFO NFs were rarely mentioned. This study represents a potential approach toward waste water treatment.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）