JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 6
·7574-7586
·
IF 2.478
Ni Xinyao,Feng Hao,Li Lihui,Liu Xiaoyun,Wang Tianyi,Cui Zhong-Kai,Gu Jinlou,Zhuang Qixin
Nanocomposites with great thermal stability and excellent dielectric properties play a vital role in the development of high-temperature resistant capacitors. A facile yet effective method to synthesize enhanced dielectric properties of thermostable three-phase poly(p-phenylene benzobisoxazole) (mCCTO@CFGO/PBO) nanocomposite films is demonstrated in this work. The amino-functionalized oxide CaCu 3 Ti 4 O 12 nanoparticles (mCCTO) are enwrapped by the carboxyl-functionalized ultrathin graphene shells (CFGO), forming the silk-cocoon structure to achieve homogeneous dispersion in the matrix. The final films are fabricated via in situ polymerization by introducing the mCCTO@CFGO nanoparticles into the PBO precursor polymer. The mCCTO@CFGO/PBO nanocomposite films exhibit high thermal stability (the 5% thermal decomposition temperature is 655 °C), while the unique silk-cocoon structure effectively confers the high dielectric constant up to 86.9 and ultra-low dielectric loss (0.063) with the loading of 10 wt% mCCTO@3 wt% CFGO/PBO at 1 kHz and 200 °C. This promising strategy accelerates the development of electronic devices used under high temperatures.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 2
·1-8
·
IF 2.253
Li Dehui,Xiao Jinglei,Gao Qiao,Hu Donghua,Yang Jing,Yuan Long
The synthesis of semiconductor nanocrystals (NCs) with low cost and in large scale is important for a variety of applications. In this work, a facile, non-vacuum solvothermal method was used to synthesize plate-shaped Cu 3 ZnInSnSe 6 (CZITSe) NCs with zincblende structure. Elemental mapping and XPS were utilized to establish the presence of all key elements. The bandgap of these CZITSe NCs is determined to be 1.22 eV. Thin films fabricated from the CZITSe NC suspension show clear photoresponse under illumination of a solar simulator, suggesting that these NCs can be photoabsorbers for thin-film solar cells. This study demonstrates a simple and economical method to synthesize CZITSe NCs with plate shape potentially useful for applications including solar energy conversion.
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AMINO ACIDS
·
2021
·Vol. 53
·期 2
·195-204
·
IF 3.52
Yang Jiangxia,Li Xiaoqi,Du Yingxiang,Ma Mingxuan,Zhang Liu,Zhang Jian,Li Peipei
In this work, we prepared gold nanoparticles (AuNPs) by employing gluconic acid (GlcA) as reducing-cum-stabilizing agent. The proposed GlcA-AuNPs successfully worked as a colorimetric sensor for visual chiral recognition of aromatic amino acid enantiomers, namely tyrosine ( d/l -Tyr), phenylalanine ( d/l -Phe), and tryptophan ( d/l -Trp). After adding L-types to GlcA-AuNPs solution, the color of the mixture changed from red to purple (or gray), while no obvious color change occurred on the addition of D-types. The effect can be detected by naked eyes. The particles have been characterized by transmission electron microscopy, Fourier-transform infrared spectroscopy, zeta potential, the dynamic light scattering analysis as well as UV–Vis spectroscopy. This assay can be used to determine the enantiomeric excess of l -Trp in the range from 0 to + 100%. The method has advantages in simplicity, sensitivity, fast response, and low cost.
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高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 10
·1-10
·
IF 6.232
Zhen Deshuai,Shi Sisi,Gao Chan,Kang Qing,Xiao Xilin,Grimes Craig A.,Cai Qingyun
Bi, Fe, and Ti ternary co-doped ZrO 2 (BFT-ZrO 2 ) nanocomposites have been prepared by a sol-gel process and used as both adsorbent and matrix for the enrichment and determination of small molecules by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The BFT-ZrO 2 nanocomposites not only can selectively enrich a wide variety of low-mass toxic pollutants but can also be used as an excellent matrix to enhance the laser desorption/ionization efficiency with low background noise and uniform co-crystalline film. Low limits of detection (LODs) (0.1 pg mL −1 for bisphenol A (BPA), 2 pg mL −1 for tetrabromobisphenol A (TBBPA), 0.1 pg mL −1 for alizarin (AZ), 0.001 pg mL −1 for bisphenol S (BPS), 0.01 pg mL −1 for indigo blue (ID), 0.01 pg mL −1 for pentachlorophenol (PCP), 100 pg mL −1 for estradiol (E2), 0.001 pg mL −1 for cetyltrimethylammonium bromide (CTAB), 0.1 pg mL −1 for crystal violet (CV), 1 pg mL −1 for malachite green (MG), 0.01 pg mL −1 for rhodamine B (RhB), and 0.01 pg mL −1 for perfluorooctane sulfonate (PFOS) were achieved. The relative standard deviations (RSDs) of shot-to-shot are 9.4–24% and of sample-to-sample 5.2–17%. The BFT-ZrO 2 matrix was successfully applied to the determination of TBBPA and BPA in tea samples. This method shows a new strategy for determination of toxic compounds in tea.
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JOURNAL OF SOLUTION CHEMISTRY
·
2020
·Vol. 49
·期 9
·1237-1249
·
IF 1.273
Li Dan,Guo Meng,Wu Qian,Li Menglei,Ruan Nannan,Gao Lijun
The density, viscosity and excess properties of biodiesel–alcohol fuel blends are investigated for research into the blending of fuels. Four n -alkanols (1-propanol, 1-butanol, 1-pentanol and 1-hexanol) as additives were mixed with ethyl laurate to form binary systems for density and viscosity measurement. Excess molar volumes and viscosity deviations of the four binary systems (1-propanol + ethyl laurate), (1-butanol + ethyl laurate), (1-pentanol + ethyl laurate), and (1-hexanol + ethyl laurate) were calculated from the experimental density and viscosity data and fitted with the Redlich–Kister equation. Grunberg–Nissan and McAllister equations were used to correlate viscosities and the correlated values from McAllister equation are in good agreement with the experimental data. The results may be useful for the research and development of biodiesel–alcohol fuel blends.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 2
·1347-1358
·
IF 3.553
Shao Huiju,Cheng Jifeng,Kang Dongdong,Qin Shuhao
Abstract Poly(vinylidene fluoride) (PVDF) membrane has been applied in the diverse water treatments, but its inherent hydrophobicity must be adjusted to reduce energy consumption. Herein, high hydrophobicity of PVDF membrane surface was transformed to superhydrophilicity by the combination of mussel-inspired chemistry and biomimetic mineralization. The deposited tannic acid (TA) and polyethylenimine (PEI) induced in situ biomimetic mineralization to form nanosphere and nanowire microstructures on the membrane surface. The highly efficient separation and outstanding antifouling properties were achieved for oil-in-water emulsion and dyeing wastewater treatment. The rejections of nano-ZrO 2 /PEI-TA/PVDF membranes to BSA, oil, Congo red and methyl blue reached as high as 99.3%, 98.8%, 96.8% and 93.5% (15-fold increment compared to that of pristine membrane), respectively. With rejections to BSA (95.0%), oil (93.9%), Congo red (86.6%) and methyl blue (83.2%), the permeate flux of nano-TiO 2 /PEI-TA/PVDF membranes reached as high as 1312.6 L/m 2 h, showing nearly 7.6-fold increment compared with other reported values. This work developed a novel strategy to fabricate multifunctional separation membranes for environmental remediation. Graphic abstract A superhydrophilic membrane with multiple hierarchical structures was fabricated through the combination of mussel-inspired chemistry and biomimetic mineralization to treat dyeing wastewater and oil emulsions highly efficiently.
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Plasmonics
·
2020
·Vol. 16
·期 2
·349-358
·
IF 2.335
Teng Yuanjie,Wang Zhenni,Ren Zeyu,Qin Yanping,Pan Zaifa,Shao Kang,She Yuanbin,Huang Weihao
Water-insoluble molecules usually show poor surface-enhanced Raman scattering (SERS) signals, because they are hardly adsorbed on the surface of most commonly used SERS substrates, such as aqueous Ag or Au colloids. In this work, a highly sensitive and reproducible Ag monolayer film (Ag MLF) SERS substrate prepared by self-assembly of Ag nanoparticles (Ag NPs) on water/oil interface can realize the trace SERS detection of water-insoluble enrofloxacin. The positively charged phase transfer catalyst can transfer the negatively charged Ag nanoparticles in aqueous solution to the water/oil interface. At the same time, the water-insoluble enrofloxacin can also be attracted to the interface because of its lipophilic group. The type/volume of the oil phase and phase transfer catalyst and the vortex mixing time were all optimized to maximize the SERS effect of Ag MLF. Results showed that trace water-insoluble enrofloxacin can be identified by Ag MLF and its detection sensitivity was significantly improved. The proposed novel Ag MLF can be further applied to detect other water-insoluble molecules in SERS.
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CATALYSIS LETTERS
·
2020
·Vol. 151
·期 5
·1282-1292
·
IF 2.482
Chen Mei-Jun,Yang Gang,Zhang Shi-Rong,Wu Jun,Zhang Yan-Zong,He Jing-Song,Song Chun,Huang Chu-Rui,Long Lu-Lu
Abstract Tetracycline (TC), as a typical micro-pollutant in natural environment, has attracted much attention. The peroxymonosulfate (PMS)-based advanced oxidation process is regarded as a promising technology for TC treatment, while its potential practical application is mainly dependent on the oxidant yield derived from activating PMS by catalysts. Therefore, the development of improved activators which are characterized by adequate activity and stability for PMS decomposition is in high demand. In this paper, the high-efficiency K 2−x Mn 8 O 16 nanowire hydrogels (KNH) with high stability was synthesized through a simple hydrothermal method and then an enhanced PMS/KNH system for antibiotic degradation via multiple strategies was established. For removal of low-concentration TC, a high degradation of nearly 95% could be achieved by activating PMS in a wide pH rang. More than that, a further catalytic mechanism of this PMS/KNH system was also put forward, thus providing a guideline for designing and fabricating transition-metal catalysts to activate PMS. Graphic Abstract
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高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 151
·期 5
·1330-1335
·
IF 2.482
Wang Weitao,Wei Yaoyao,Jiang Xulu,He Zhen-Hong,Zhang Cunshe,Liu Zhao-Tie
Abstract Direct hydroxylation of benzene to phenol with dioxygen is a green route for synthesis of phenol. The higher bonding energies of C–H in benzene and O–O in dioxygen make metal-free catalysis a challenge. A novel metal-free catalyst of quinone-cylcohexanone-formaldehyde polymer was rationally designed and prepared. The polymer was characterized with FT-IR, XRD, Raman, SEM, 13 C NMR and XPS. Abundant oxygen functional groups of cyclic ketonic, quinone carbonyl and hydroquinone were found on the surface of polymer. The catalytic performances for hydroxylation of benzene to phenol with dioxygen over the metal-free catalyst were investigated and a phenol yielding of 11.4% was achieved. Moreover, the reaction mechanism was proposed. Graphic Abstract
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 5
·3755-3777
·
IF 3.553
Huang Haoxin,Zhang Huiping,Yan Ying
Abstract Three types of carbon nanotubes coated on paper-like sintered stainless steel fibers (PSSF) were synthesized and applied for continuous catalytic wet hydrogen peroxide oxidation (CWPO) of phenol. The novel metal-free nitrogen-doped carbon nanotube-coated PSSF catalyst (N-CNTs/PSSF) was designed by direct chemical vapor deposition using melamine as solid precursor for the first time, and CNTs/PSSF and Fe 2 O 3 -deposited CNTs/PSSF (Fe-CNTs/PSSF) catalysts were synthesized for comparison. Characterization results showed that all the catalysts exhibited three-dimensional networks structure, with nanotubes wrapping on the stainless steel fibers successfully, and the N-CNTs showed distinct irregular corrugated morphology with nitrogen-doping level about 5.18 at.%. CWPO of phenol revealed that the N-CNTs/PSSF catalyst achieved favorable catalytic activity and highest stability during 100-h reaction (phenol and TOC conversions reached about 90% and 50%, respectively), while phenol conversions of CNTs/PSSF and Fe-CNTs/PSSF catalysts decreased over time to 72% and 58%, respectively. The N-CNTs/PSSF catalyst also showed the lowest Fe weight loss ratio (about 2.44 wt%) among the three catalysts. The favorable catalytic results of N-CNTs/PSSF can be ascribed to the synergistic effects of the strong affinity toward polar molecules of N-CNTs, as well as the enhancement in contact efficiency associated with three-dimensional networks structure of the PSSF. Graphical abstract
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2020
·Vol. 97
·期 1
·1-4
·
IF 2.008
Chen Wenming,Wang Haibo,Guo Xuan,Zhong Jinyi
Self-detoxifying materials for capturing and destructing chemical warfare agents (CWAs) have attracted intense attention in efficient personal protection and safe handling of contaminated materials. In this study, we reported an approach for synthesis of flexible Zr(OH) 4 -carbon fiber composite by sol–gel method. Activated carbon fibers serving as substrate carrier and adsorption conveyor could effectively make Zr(OH) 4 evenly distributed on the surface, which has excellent sorption properties and wide-ranging reactivity toward CWAs. The results demonstrated that the Zr(OH) 4 -carbon fiber composite could quickly remove (within 10 s) and 6-h degradation efficiency to 10-mg/mL sulfur mustard (HD) and O-ethyl S-(2-diisopropylamino)-ethyl methylphosphonothioate (VX) could reach 92.2 and 99.99%. In addition, it was found that Zr(OH) 4 -carbon fiber composite remained intact after adsorption, which could recollect resources and avoid Zr(OH) 4 leakage into waters. Therefore, the designed Zr(OH) 4 -carbon fiber composite will be a good potential application in precision equipment or skin decontamination equipment.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 11
·1-12
·
IF 6.232
Yang Huiyi,He Qiyi,Chen Yingshan,Shen Ding,Xiao Huanxin,Eremin Sergei A.,Cui Xiping,Zhao Suqing
Platinum nanoflowers (PtNFs) were utilized in a competitive enzyme-linked immunosorbent assay (ELISA) and in a lateral flow immunoassay (LFIA) for superior peroxidase-like activity and intense brown color, respectively. PtNFs were linked to the polyclonal antibody (pAb) to form the pAb-PtNFs probes for the dual immunoassay. Based on optimized pAb-PtNF probes, both enzyme-linked immunosorbent assay (PtNFs-ELISA) and lateral flow immunoassay (PtNFs-LFIA) perform very well. The absorbance at 450 nm decreases linearly in the DHEA concentration range 2.1 to 118.1 ng mL −1 , and the limit of detection is 1.3 ng mL −1 and the IC 50 value is 15.7 ng mL −1 of PtNFs-ELISA. The visual cut-off value of PtNFs-LFIA is 10.0 ng mL −1 . The average recoveries from spiked samples range from 95.0 to 108.9% with a coefficient of variation below 12.2%. Excellent recoveries and correlation between the two methods were observed. Furthermore, the designed immunosensors exhibited good selectivity, confirming a broad development prospect in DHEA monitoring.
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