COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Chunxia Cheng,Mengjie Zhang,Siyu Wang,Yushi Li,Hengyu Feng,Danlin Bu,Zice Xu,Yong Liu,Lin Jin,Linghan Xiao,Yuhui Ao
In order to address the less-than-satisfactory interfacial properties and thermal conductivity of carbon fiber reinforced polymers (CFRPs), a general solvent-free GO@Fe 3 O 4 nanofluid (GFNF) hybrid water-based sizing agent was prepared and applied for carbon fiber (CF) sizing. A discussion was conducted about the effects of different GFNF contents on the CF/epoxy composites (CF/EP) for their interfacial properties and thermal conductivity. In comparison with the composites made up of commercial CF and epoxy, the interfacial and thermal conductivities of the GFNFCF/EP composites were significantly improved. Notably, the increase in 2.5-GFNFCF/EP was most noticeable, with ILSS and flexural strength improved by 15% and 43.6%, respectively. This is attributed to the uniform adhesion of GFNF to the CF surface, which enhances the physical-chemical interaction of fiber with matrix, promotes the dispersion of stress, and prevents cracking from spreading. Also, the thermal conductivity was improved by 128.9% due to the formation of continuous thermal conduction pathways at the interface. The mechanism behind interface and thermal conductivity enhancement of the composites was proposed. This hybrid sizing agent contributed a different solution to improving the interfacial properties and thermal conductivity of CFRPs at the same time.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2021
·Vol. 44
·期 11
·2290-2300
·
IF 3.645
Ou Sha,Hua Liu,Minqiang Ye,Yuqing Zhu,Jiawei Yao,Zimin Li,Ying Zhao
A simple, green, and efficient mechanochemical approach was developed herein to prepare tunable magnetic graphene oxide nanoparticles. The obtained nanoparticles were successfully used as adsorbents in a magnetic dispersive solid-phase extraction method to extract three cationic dyes (i.e., thioflavine T, auramine-O, and basic orange 2) found in food samples. Our proposed approach also utilized high-performance liquid chromatography with ultraviolet detection. Several key variables affecting the extraction recovery were investigated. These included the sample pH, amount of extractant, extraction time, sample volume, elution solvent type and volume, and the stability and reusability of the magnetic graphene oxide nanoparticles. Under optimized conditions, the calibration curve was linear at a concentration range of 0.005-1.0 μg/mL with a correlation coefficient of 0.9992-0.9996. Moreover, the limits of detection were determined at 0.97-1.35 μg/mL. The extraction mechanism was investigated via ultraviolet-visible spectrophotometry and zeta-potential analyses. The developed method was used to analyze the above-mentioned cationic dyes in bean products and yellow fish samples. Notably, satisfactory spiked recoveries ranging from 90.7 to 104.9% were achieved.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2021
·Vol. 14
·期 11
·3040
·
IF 3.623
Wei Zhang,Kaikai Wang,Xiaodan Hu,Xiaohong Zhang,Shuquan Chang,Haiqian Zhang
A shortage in the supply of3He used for thermal neutron detector makes researchers to find3He alternatives for developing new neutron detectors. Here, we prepared a neutron-sensitive composite liposome with tributyl borate and encapsulating with Fe3O4@oleic acid nanoparticles (Fe3O4@OA NPs), methylene blue (MB), or anti-albumin from bovine serum (anti-BSA). The tributyl borate compound was characterized by Fourier transform infrared spectroscopy (FT-IR). In addition, the morphology, element compositions, and magnetic properties of the composite liposome were investigated with transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM), respectively. The results indicated that a typical ellipsoidal magnetic liposome structure was obtained, and the lengths of the minor axis and major axis were 49 ± 1 nm and 87 ± 3 nm, respectively. Under thermal neutron irradiation, the structure of composite liposome was destroyed, and encapsulated reporter molecules were released, which was detected by ultraviolet–visible (UV–vis) spectroscopy and surface plasmon resonance (SPR) technology. The response of this sensor based on a destructive assay shows a good correlation with neutron doses. Besides, the sensor has a neutron to gamma-ray rejection ratio of 1568 at a thermal neutron flux rate of 135.6 n/cm2·s, which makes it a promising alternative to3He.Keywords:neutron detector;magnetic liposome;methylene blue (MB);anti-BSA;surface plasmon resonance
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 20
·9264-9273
·
IF 3.591
Chaowei Wang,Zhe Liu,Guangfa Hu,Ruimin Gao,Jianshe Zhao
In this study, the novel magnetic core–shell composites Fe3O4@UiO-66-HPA, consisting of magnetic Fe3O4@UiO-66 and vanadium-substituted Keggin-type heteropolyacid active species supported by Zr-MOF, were successfully prepared via a one-pot method and fully investigated using FT-IR, XRD, SEM, TEM, TEM-EDX, ICP, VSM and N2 adsorption–desorption isotherms. The synthetic composites were employed as catalysts in an ODS system of simulated fuel under oxygen. The catalyst Fe3O4@UiO-66-PW9V3 exhibits the supreme catalytic performance in this work, with sulfur removal of 99.85% and a TOF value of 31.16 h−1 under optimal reaction conditions (0.2 g catalyst mass, 60 °C reaction temperature, 500 rpm stirring speed, 1 L min−1 oxidant quantity and 180 min reaction time), and can also be recycled ten times without apparent loss of catalytic performance. Furthermore, the kinetic study shows that the ODS process accords with the pseudo-first-order model.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 5
·2764-2774
·
IF 11.301
Yali Wang,Ruihui Gan,Hao Liu,Mahmut Dirican,Chengbiao Wei,Chang Ma,Jingli Shi,Xiangwu Zhang
The advancement of electrocatalysts using non-precious metals with excellent catalytic ability and durability for the oxygen reduction reaction (ORR) remains an enormous challenge. Transition metal–nitrogen–carbon (M–N–C) materials become target products with great development and application prospects for the ORR in new electrochemical energy storage and conversion devices. Herein, a simple preparation procedure of N-doped hierarchically porous carbon nanospheres loaded with Fe3O4/Fe2O3/Fe nanoparticles (Fe–CNSs–N) is developed by direct annealing of an Fe-doped quinone-amine polymer in an NH3/Ar atmosphere. Due to the integration of large specific surface area, hierarchically porous structure, and Fe3O4/Fe2O3/Fe nanoparticles, Fe–CNSs–N presents a half-wave potential of 0.835 V vs. RHE, which is 7 mV more positive than that of a commercial Pt/C catalyst in an alkaline medium. It also exhibits outstanding long-cycle durability as well as methanol endurance, superior to the Pt/C catalyst. Compared to the zinc–air battery based on Pt/C, the Fe–CNSs–N-based battery presents a higher open-circuit potential of 1.54 V, steadier discharge–charge cycle performance and an outstanding maximum power density of 106.8 mW cm−2. The excellent electrocatalytic performances make Fe–CNSs–N a promising substitute for Pt/C noble-metal catalysts in rechargeable Zn–air batteries.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2020
·
IF 4.389
Chaochao Wen,Rina Cheng,Tao Gong,Yu Huang,Dan Li,Xuhua Zhao,Baofeng Yu,Dan Su,Zhiling Song,Wenting Liang
Synergistic photochemical therapy with high performance and weak side effects is of great importance in hepatocellular carcinoma (HCC) treatment, therefore ingenious construct of nano-based therapy agents with accurate drug delivery and high photothermal conversion efficiency is of critical to the cancer therapy. Herein, an organic-inorganic hybrid nanomaterial (MGO@CD-CA-HA) has been constructed successfully by coating the β-cyclodextrin-cholic acid-hyaluronic acid polymer (CD-CA-HA) onto the Fe 3 O 4 -graphene oxide (MGO). The MGO@CD-CA-HA revealed satisfactory multiple-targeted features including the cholic acid supplied hepatic-target, CD44-receptor target of hyaluronic acid and magnetic target of Fe 3 O 4 . Meanwhile, the hydrophobic antitumor drug camptothecin (CPT) was easily loaded by MGO@CD-CA-HA to form the MGO@CD-CA-HA/CPT nanocomposite, and the maximum theoretical adsorption capacity can reach 847.4 mg/g. Based on the facile photothermal response of MGO , the near-infrared radiation (808 nm) induced local hyperthermia was directly generated the apoptosis of tumor cells while triggered the release of CPT. Comparing with other kinds of cancer cells and normal hepatocyte cells, this PCT system provides a significant inhibitory effect for the liver cancer cells in vitro . Furthermore, the synergistic photochemical therapy presented the strong antitumor effect (the tumor inhibition rate > 90 %) in vivo . Thus, this study provided a promising multiple-targeted nanocarrier for chemo-photothermal combination therapy of liver cancer.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 19
·7727-7739
·
IF 3.288
Hui Wang,Shaowei Yan,Bo Qu,He Liu,Jie Ding,Nanqi Ren
A rapid and efficient magnetic solid phase extraction (MSPE) method, based on Fe3O4@β-cyclodextrin–lipid bilayer nanocomposites (Fe3O4@β-CD–LB), was built. The MSPE method coupled with GC-QTOF-MS has been designed for the trace detection of nine organochlorine pesticides (OCPs) in soil samples. The Fe3O4@β-CD–LB was successfully synthesized and characterized by vibrating sample magnetometry, Fourier transform infrared spectrometry, transmission electron microscopy, field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. In this experiment, the OCPs in the soil samples were firstly extracted with n-hexane/dichloromethane (v/v 1 : 1) at high pressure and temperature, and then subjected to MSPE for adsorption and purification. Considering the synergy effect between host–guest inclusion complexation and hydrophobic interaction in the adsorption mechanism, the bi-functionalized magnetic nanocomposites exhibited excellent adsorption properties for the OCPs and natural resistance to interference by macromolecules. Under the optimum experimental conditions, the method showed wide linear ranges with low limits of detection (4.5 to 34 pg g−1). The results showed that the mean recoveries of the OCPs in the soil samples were 78–107% with 3.0–6.1% intra-day relative standard deviation (RSD) and 3.5–6.9% inter-day RSD. The method has been applied for the determination of the OCPs in actual samples, and ΣOCPs ranged between 0 and 2.3 ng g−1 in seven soil samples.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Chun-Yang Li,Jing-Min Liu,Zhi-Hao Wang,Shi-Wen Lv,Ning Zhao,Shuo Wang
Aflatoxins have been a hot topic in the field related into public health and ecosystem protection, and great effort has been made in developing of adsorptive materials for effective probing the target aflatoxins. Conventional materials, like metal-organic frameworks (MOFs) showed promising application in separation science. However, the cumbersome separation process, competitive adsorption are also major challenges. Regarding this, a novel magnetic micro-composite denoted as Fe 3 O 4 @UiO-66-NH 2 @MON with core-shell structure was constructed. The core of Fe 3 O 4 microspheres was coated with MOFs crystals, and then microporous organic network (MON) was introduced onto the surface of Fe 3 O 4 @UiO-66-NH 2 through a sonogashira coupling reaction. It exhibited good magnetic separation ability, which effectively simplified the pre-treatment steps. The proposed method possessed excellent selectivity and sensitivity, with detection limits in the range of 0.15-0.87 μg L −1 combination with HPLC analysis. More importantly, the MON coating significantly improved the hydro-stability of whole adsorbents, thus enhancing the adsorption efficiency and favoring the practical application of the materials. The developed Fe 3 O 4 @UiO-66-NH 2 @MON-based solid extraction method has been well-applied for real sample analysis, with the recovery of 87.3%–101.8%. We believe the newly-constructed hybrid nano-adsorbents hold great potential in further application in various analytical methods for different target analytes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2019
·Vol. 19
·期 23
·5152
·
IF 3.031
Qingmin Wei,Jianjuan Lin,Fa Liu,Changchun Wen,Na Li,Guobao Huang,Zhihui Luo
A surface-enhanced Raman scattering (SERS) tag is proposed for high-sensitivity detection of gibberellin A3(GA3). Silver nanoparticles (AgNPs) were synthesized using citrate reduction. 4-Mercaptobenzoic acid (MBA) was used for the Raman-labeled molecules, which were coupled to the surface of the AgNPs using sulfydryls. MBA was coated with silica using the Stöber method to prevent leakage. GA3antibodies were attached via the active functional groups N-Hydroxysuccinimide (NHS) and N-Ethyl-N’-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) to construct a novel[email protected]2SERS tags. The captured SERS substrates were fabricated through Fe3O4nanoparticles and gold nanoparticles (AuNPs) using chemical methods. These nanoparticles were characterized using ultraviolet-visible spectroscopy (UV–Vis), dynamic light scattering, Raman spectroscopy, transmission electron microscope (TEM), and X-ray diffraction (XRD). This[email protected]2SERS tags has a strong SERS signal based on characterizations via Raman spectroscopy. Based on antigen-antibody reaction, the[email protected]3O4nanoparticles can capture the GA3and[email protected]2SERS tags. Due to the increasing number of captured nanoprobes, the SERS signal from MBA was greatly enhanced, which favored the sensitive detection of GA3. The linear equation for the SERS signal was y = −13635x + 202211 (R2= 0.9867), and the limit of detection (LOD) was 10−10M. The proposed SERS tags are also applicable for the detection of other food risk factors.Keywords:surface-enhanced Raman scattering;[email protected]2core-shell nanoparticles;[email protected]3O4nanoparticle;gibberellin
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Tong Chang,Yajun Hou,Fengze Wang,Yumei Wang,Yushui Bi
Semiconductor photocatalyst materials based on TiO 2 are potential photosensitizers for photodynamic therapy of cancer. Despite its effectiveness under ultraviolet light, pure TiO 2 shows almost no photocatalytic activity under visible light because of its wide intrinsic band gap energy (anatase, 3.2 eV). Besides, TiO 2 has no magnetic delivery property. In this study, an inorganic nanocomposite, N-TiO 2 /SiO 2 /Fe 3 O 4 , is successfully prepared in three steps by means of co-precipitation, Stöber and sol-gel methods. Deep characterization results by XRD , TEM, XPS , UV–vis DRS, FL and magnetic hysteresis loop reveal that N-TiO 2 /SiO 2 /Fe 3 O 4 has core-shell structure, magnetic property and visible-light-response capability. As a potential photosensitizer for photodynamic therapy, it shows a stronger photodynamic suppression effect on proliferation of HeLa cells than TiO 2 under the irradiation of xenon light.
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 15
·4526-4533
·
IF 4.019
Pan Li,Meihong Ge,Chentai Cao,Dongyue Lin,Liangbao Yang
Development of analytical methods allowing sensitive detection of neurotransmitters in various biofluids is vital. However, limitations of these methods include interference of impurities and stringent requirements concerning sample purity. In the current work, we developed a strategy for the rapid and sensitive analysis of dopamine (DA) in various biofluids with a smart surface-enhanced Raman spectroscopy (SERS) probe composed of magnetite Fe3O4 and Au nanoparticles (Fe3O4/Au NPs). Besides the simple and quick separation of DA from the specimen, Fe3O4 not only enabled a specific chemical interaction with DA molecules, but also acted as a SERS substrate capable of electromagnetically enhancing the Raman signal of DA. Therefore, the Fe3O4/Au NP composite with its coexisting electric-field effect and charger transfer (CT) enhancement was found to be beneficial for capturing the target molecules in biological environments and then enhancing the DA sensitivity. To understand the strong binding interaction between Fe3O4/Au and DA, X-ray photoelectron spectroscopy (XPS) was carried out, specifically to illuminate the chemical adsorption or possible CT complex. Moreover, a rapid purification strategy for further separating DA from serum was developed, and thus a high nanometer-level sensitivity was achieved. In addition, the feasibility of using Fe3O4/Au combined with the developed purification method was also verified using various tissue homogenates spiked with DA molecules. Such a nanocomposite can offer the possibility of efficiently separating DA from the complex specimen and then providing the sensitive detection of DA for various tissues. Accordingly, the smart SERS Fe3O4/Au nanocomposite probe, with its advantages of simple pre-treatment and synergetic enhanced mechanisms, shows great promise for the rapid and sensitive detection of DA in complicated specimens.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Xin Li,Bangxiang Liu,Kun Ye,Liang Ni,Xuechao Xu,Fengxian Qiu,Jianming Pan,Xiangheng Niu
Due to the role of phosphate (PO 4 3− ) as an indicator of eutrophication pollution, developing low-cost and high-performance approaches to detect it turns to be of great significance. Herein, we developed a highly sensitive and specific colorimetric sensor for PO 4 3− determination via utilizing Zr 4+ to synergistically inhibit the peroxidase-like activity of Fe 3 O 4 nanocubes. The decoration of hydrophilic 3,4-dihydroxyhydrocinnamic acid (DHCA) on Fe 3 O 4 endows it with enhanced ability to catalyze the 3,3′,5,5′-tetramethylbenzidine (TMB) chromogenic reaction. Because of electrostatic interaction, Zr 4+ is easy to be adsorbed onto the negatively charged Fe 3 O 4 -DHCA nanozyme. When PO 4 3− is added, it can interact with Zr 4+ and form a coating on Fe 3 O 4 -DHCA surface, significantly suppressing its peroxidase-mimicking activity. As a result, the TMB chromogenic reaction is seriously inhibited in the presence of PO 4 3− . Based on this strategy, PO 4 3− in the wide scope of 0.066–33.3 μM could be linearly determined, providing a detection limit down to 49.8 nM. Thanks to the strong and specific interaction between Zr 4+ and PO 4 3− , the colorimetric sensor could be employed to detect PO 4 3− with favorable selectivity. Reliable analysis of the target in practical water was also verified by our assay, indicating its great potential as a simple but efficient tool for environmental monitoring.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）