Nature Communications
·
2020
·Vol. 11
·期 1
·1-12
·
IF 12.121
Zhai Panlong,Zhang Yanxue,Wu Yunzhen,Gao Junfeng,Zhang Bo,Cao Shuyan,Zhang Yanting,Li Zhuwei,Sun Licheng,Hou Jungang
Rational design of the catalysts is impressive for sustainable energy conversion. However, there is a grand challenge to engineer active sites at the interface. Herein, hierarchical transition bimetal oxides/sulfides heterostructure arrays interacting two-dimensional MoO x /MoS 2 nanosheets attached to one-dimensional NiO x /Ni 3 S 2 nanorods were fabricated by oxidation/hydrogenation-induced surface reconfiguration strategy. The NiMoO x /NiMoS heterostructure array exhibits the overpotentials of 38 mV for hydrogen evolution and 186 mV for oxygen evolution at 10 mA cm −2 , even surviving at a large current density of 500 mA cm −2 with long-term stability. Due to optimized adsorption energies and accelerated water splitting kinetics by theory calculations, the assembled two-electrode cell delivers the industrially relevant current densities of 500 and 1000 mA cm −2 at record low cell voltages of 1.60 and 1.66 V with excellent durability. This research provides a promising avenue to enhance the electrocatalytic performance of the catalysts by engineering interfacial active sites toward large-scale water splitting.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22028-22038
·
IF 2.22
Peng Qirui,Yang Lu,Zhao Qiuying,Ma Yizhou,Ji Hongli,Qiu Jinhao
The development of piezoelectric polymers with superior electromechanical performance is a demand in the areas of flexible sensors, actuators and tissue engineering, among others. In this work, we reported a novel sandwich-structured piezoelectric composites comprising of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and Prussian blue analogs Co 3 [Co(CN) 6 ] 2 with excellent electromechanical activities. The large specific surface area, unique three-dimensional porous nanostructure and redox behavior of Co 3 [Co(CN) 6 ] 2 appeared to significantly promote the interfacial coupling effect within P(VDF-HFP), resulting in enhanced electromechanical response. Moreover, the sandwich structure topological design would enlarge the interfacial coupling effect, strengthen the breakdown strength and consequently raise the electromechanical performance. For instance, a maximum piezoelectric coefficient d 33 of ~ 41 pC/N can be achieved in the sandwiched composites at a loading of 0.8 wt%, which is 1.78 times that of pure P(VDF-HFP). Furthermore, the sandwiched composites possess superior electromechanical coupling factor k 33 up to 0.215, while that of pure P(VDF-HFP) is only 0.134.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2021
·Vol. 15
·期 2
·1747-1753
·
IF 2.431
Li Yi-Fang,Lin Zheng-Zhong,Hong Cheng-Yi,Huang Zhi-Yong
A facile colorimetric method for rapid detection of putrescine (Put) and cadaverine (Cad) based on the peroxidase-like activity of (Fe,Co) codoped-CDs was developed. With the enzymatic hydrolysis by diamine oxidase (EC 1.4.3.6, DAO), Biogenic amines (BAs) were decomposed to produce H 2 O 2 which oxidizes 3,3',5,5'-tetramethyl-benzidine with the catalysis of (Fe,Co)-codoped CDs. By means of principal component analysis, Put and Cad were differentiated from BAs and their total amounts were detected by measuring the spectral absorption at 652 nm with a linear range from 0.25 to 10 mg kg −1 . The colorimetric method was applied to the detection of Put and Cad in various fish samples with a detection limit ((3σ/k, n = 9)) of 0.06 mg kg −1 . Besides verifying with HPLC, the recoveries of the colorimetric method were also tested by spiking standards at three levels with the range of 98.2%–115.7%, indicating that the established colorimetric method was accurate and sensitive.
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 13
·期 1
·1-14
·
IF 12.264
Huang Jiahui,Wu Peiyi
Complex multiscale assemblies of metal–organic frameworks are essential in the construction of large-scale optical platforms but often restricted by their bulk nature and conventional techniques. The integration of nanomaterials and 3D printing technologies allows the fabrication of multiscale functional architectures. Our study reports a unique method of controlled 3D assembly purely relying on the post-printing treatment of printed constructs. By immersing a 3D-printed patterned construct consisting of organic ligand in a solution of lanthanide ions, in situ growth of lanthanide metal–organic frameworks (LnMOFs) can rapidly occur, resulting in macroscopic assemblies and tunable fluorescence properties. This phenomenon, caused by coordination and chelation of lanthanide ions, also renders a sub-millimeter resolution and high shape fidelity. As a proof of concept, a type of 3D assembled LnMOFs-based optical sensing platform has demonstrated the feasibility in response to small molecules such as acetone. It is anticipated that the facile printing and design approach developed in this work can be applied to fabricate bespoke multiscale architectures of functional materials with controlled assembly, bringing a realistic and economic prospect.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 413
·期 1
·235-244
·
IF 3.637
Guo Haixin,Su Xiaoping,Su Qingfu,Zhuang Wei,You Zhijiao
A portable photothermal immunoassay based on Au-coated magnetic Fe 3 O 4 core-shell nanohybrids (Au-Fe 3 O 4 ) was developed for point-of-care (POC) testing of lipoprotein-associated phospholipase A 2 (Lp-PLA 2 ) on a digital near-infrared (NIR) thermometer. Au-Fe 3 O 4 photothermal materials were first synthesized through reverse micelle method, and then functionalized with polyclonal rabbit anti-human Lp-PLA 2 antibody. A sandwiched immunoreaction was carried out in polyclonal mouse anti-human Lp-PLA 2 antibody-coated microplate using Au-Fe 3 O 4 -labeled antibody as the detection antibody. With formation of sandwich-type immunocomplex, the captured Au-Fe 3 O 4 on the plate converted the light into heat under an 808-nm laser irradiation (1.5 W cm −2 ), thereby resulting in the increasing temperature of the detection solution. The temperature variations relative to surrounding temperature was determined on a portable NIR thermometer. Several labeling protocols with gold nanoparticle, Fe 3 O 4 nanoparticle, or Au-Fe 3 O 4 nanohybrids were investigated for determination of Lp-PLA 2 and improved analytical features were achieved with the core-shell Au-Fe 3 O 4 nanohybrids. Under optimum conditions, Au-Fe 3 O 4 -based immunoassay exhibited good photothermal responses for the detection of Lp-PLA 2 with a dynamic linear range of 0.01–100 ng mL −1 at a low detection limit of 8.6 pg mL −1 . Good reproducibility and intermediate precision were less than 9.7%. Other biomarkers or proteins did not interfere with responses of this system. An acceptable accuracy was acquired for analysis of human serum sample between Au-Fe 3 O 4 -based photothermal immunoassay and commercialized human Lp-PLA 2 ELISA kit.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 28
·期 6
·6980-6989
·
IF 3.056
Yan Lili,Guo Xin,Rao Pinhua,Huang Lu,Sun Mingxing,Li Liang,Shen Guoqing
Soil fumigation using 1,3-dichloropropene (1,3-D) and chloropicrin (CP) is an important strategy for agriculture production; however, excessive emissions can cause air pollution and possible human exposure. In this study, solar light-driven CuInS 2 /ZnS:Al-TiO 2 photocatalytic film was prepared through spin-coating on the flexible polyethylene terephthalate (PET) substrate of 0.1 mm. Using the photocatalytic film, degradation of 1,3-D was inhibited in the Pci-clor 60 formulation of 1,3-D and CP. However, the degradation of CP was accelerated in this formulation, and the half-life was shortened from 0.66 to 0.40 h. Emissions of 1,3-D from soil to the air were reduced by 97.30%, 97.17%, 47.10%, and 7.88%, for treatments of D + Film, D + C + Film, D + PET, and D, respectively. The efficiencies for reducing 1,3-D emission were significantly improved by about 1.1 and 11.3 times using the film, compared with using the PET alone and no film, respectively. Furthermore, fumigation effects on nematodes could still achieve higher than 90%. The findings provided a basis for the practical application of quantum dot films to reduce soil fumigants emissions by photocatalytic degradation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 20
·17461-17473
·
IF 2.22
Bhattacharya Anish,Zhang Yin,Wu Haiyan,Chu Xiangfeng,Dong Yongping,Liang Shiming,Xu Jiaqiang,Chakraborty Amit K.
Due to its importance in human health and environmental monitoring, ethanol sensing has generated large research interest across the globe. In this work, we report a simple co-precipitation method to synthesize La-doped BaSnO 3 and evaluate its ethanol sensing properties. Electron microscopy and X-ray diffraction analyses revealed formation of crystalline BaSnO 3 having rod-like shape, few microns in length and 1–2 µm in width. The optimal sensing performance was achieved when operated at 220 °C for 4 wt% La-doped BaSnO 3 microrods for which a response as high as 48 was obtained against 100 ppm of ethanol exposure, whereas the undoped BaSnO 3 exhibited its best performance (although much lower response) at 260 °C. Multiple characterization techniques revealed that the enhancement of the sensor performance by incorporation of La was due to changes in the physico-chemical properties like specific surface area, oxygen content and electronic bandgap of the BaSnO 3 . The high repeatability, high selectivity to ethanol, fast response and recovery times, and low detection limit of 0.01 ppm suggest good potential for the 4% La-doped BaSnO 3 film as a low cost ethanol sensor.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-10
·
IF 14.919
Min Yuan,Zhou Xiao,Chen Jie-Jie,Chen Wenxing,Zhou Fangyao,Wang Zhiyuan,Yang Jia,Xiong Can,Wang Ying,Li Fengting,Yu Han-Qing,Wu Yuen
The construction of enzyme-inspired artificial catalysts with enzyme-like active sites and microenvironment remains a great challenge. Herein, we report a single-atomic-site Co catalyst supported by carbon doped boron nitride (BCN) with locally polarized B–N bonds (Co SAs/BCN) to simulate the reductive dehalogenases. Density functional theory analysis suggests that the BCN supports, featured with ionic characteristics, provide additional electric field effect compared with graphitic carbon or N-doped carbon (CN), which could facilitate the adsorption of polarized organochlorides. Consistent with the theoretical results, the Co SAs/BCN catalyst delivers a high activity with nearly complete dechlorination (~98%) at a potential of −0.9 V versus Ag/AgCl for chloramphenicol (CAP), showing that the rate constant ( k ) contributed by unit mass of metal ( k /ratio) is 4 and 19 times more active than those of the Co SAs/CN and state-of-the-art Pd/C catalyst, respectively. We show that Co single atoms coupled with BCN host exhibit high stability and selectivity in CAP dechlorination and suppress the competing hydrogen evolution reaction, endowing the Co SAs/BCN as a candidate for sustainable conversion of organic chloride.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2020
·Vol. 51
·期 2
·307-316
·
IF 2.384
Feng Yanlong,Wang Fuyue,Wang Luyu,Guo Manli,Lei Yanming,Feng Ye,Cao Yujuan,Yu Ying
Abstract Three-dimensional porous carbon network (3D-C) was used as the substrate for the in situ growth of molybdenum disulfide (MoS 2 ) through a wet chemistry method. The obtained 3D-C@MoS 2 nanocomposite exhibited a porous structure, high surface area and good electrical conductivity. By using the 3D-C@MoS 2 nanocomposite as a novel electrode modifier, the electrochemical oxidation peak current of bisphenol A (BPA) was greatly enhanced with a lowered background current. The improved sensitivity benefits from adsorption of BPA onto MoS 2 surface, the large surface area and good conductivity of the 3D-C@MoS 2 nanohybrid. By using differential pulse voltammetry (DPV), we observed a good linearity with BPA levels in the range of 0.001–10 μM, with a detection limit estimated to be 0.5 nM (S/N = 3). The 3D-C@MoS 2 modified electrode could be reused for several times in spite of the accumulation of BPA, and the fabrication reproducibility is excellent. The prepared 3D-C@MoS 2 modified electrode showed higher selectivity to BPA than several other phenolic compounds due to their different electrochemical oxidation potentials and the enhanced accumulation property of BPA at the 3D-C@MoS 2 surface. The BPA contents in plastic product and environmental water samples were determined with the proposed method. Graphic abstract
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 7
·1-10
·
IF 6.232
Gao Tingting,Xing Shu,Xu Mengjia,Fu Pan,Yao Jiechen,Zhang Xiaokang,Zhao Yang,Zhao Chao
A convenient fluorometric method was developed for specific determination of DNA based on peptide nuclei acid (PNA)–regulated fluorescence resonance energy transfer (FRET) between carbon dots (CDs) and gold nanoparticles (AuNPs). In this system, CDs that display lake blue fluorescence with excitation/emission maxima at 345/445 nm were used as fluorometric reporter, while AuNPs were used as fluorescence nanoquencher. A neutral PNA probe, which is designed to recognize the target DNA, was used as a coagulant to control the dispersion and aggregation of AuNPs. Without DNA, PNA can induce immediate AuNP aggregation, thus leading to the recovery of the FRET-quenched fluorescence emission of CDs. However, the addition of the complementary target DNA can protect AuNPs from being aggregated due to the formation of DNA/PNA complexes, which subsequently produces a high fluorescence quenching efficiency of CDs by dispersed AuNPs. Under optimized conditions, quantitative evaluation of DNA was achieved in a linear range of 5–100 nM with a detection limit of 0.21 nM. This method exhibited an excellent specificity towards fully matched DNA. In addition, the application of this assay for sensitive determination of DNA in cell lysate demonstrates its potential for bioanalysis and biodetection.
A simple fluorometric biosensor for specific detection of DNA was developed based on peptide nuclei acid (PNA)–regulated fluorescence resonance energy transfer (FRET) between carbon dots (CDs) and gold nanoparticles (AuNPs).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AAPS PHARMSCITECH
·
2020
·Vol. 21
·期 8
·1-12
·
IF 2.401
Geng Qiang,Zhao Yuming,Wang Lu,Xu Lulu,Chen Xiong,Han Jing
The study is designed to formulate, optimize, and evaluate astaxanthin (ASTA)-loaded nanostructured lipid carrier (NLC) with an aim to improve its stability, water solubility, skin permeability and retention and reduce drug-related side effects. ASTA was extracted from Haematococcus pluvialis. ASTA-NLC was formulated by the technique of melt emulsification—ultrasonic and optimized taking solid:liquid lipid ratio, total lipid:drug ratio, drug concentration, emulsifier types, and amounts as independent variables with particle sizes (PS) and entrapment efficiency (EE) as dependent variables. The optimized formulation (N21) exhibited spherical surfaced stable nanoparticles of 67.4 ± 2.1 nm size and 94.3 ± 0.5% EE. Formulation N21 was then evaluated for its physiological properties, physicochemical properties, drug content, in vitro release and skin penetration, and retention analysis. The ASTA-NLC was found to be nonirritating, homogenous, and with excellent stability and water solubility. In vitro release studies showed the cumulative release rate of NLC was 83.0 ± 3.4% at 48 h. The skin penetration and retention studies indicated that cumulative permeability was 174.10 ± 4.38 μg/cm 2 and the retention was 8.00 ± 1.62 μg/cm 2 within 24 h. It can be concluded that NLC serves as a promising carrier for site specific targeting with better stability and skin penetration.
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 1
·1-8
·
IF 5.833
Gao Ruru,Wang Junhong,Wang Han,Dong Wei,Zhu Junwu
A new method based on coordination polymer nanoparticles (CPNs) derived from nucleotides and Tb 3+ ions (GMP/Tb) for the selective and sensitive determination of aqueous 2,4,6-trinitrophenol (TNP) (picric acid) is established. The fluorescence of GMP/Tb nanoparticles is effectively quenched by TNP via photo-induced charge transfer (PCT), thus achieving its selectivity toward TNP over other nitroaromatic explosives. The decreased fluorescence of GMP/Tb shows a good linear relationship to the concentrations of TNP ranging from 5.0 to 40.0 μM, and the limit of detection is 26.0 nM (5.96 ppb). The proposed GMP/Tb probe also achieves satisfactory results in real samples. The obtained recoveries of this method in river water samples are in the range 93.15–106.10%. The relative standard deviation (RSD) are 0.57 to 1.01% based on three repeated determinations. This fabricated detector provides a feasible path for determination of ppb-level TNP in natural water samples, which can help humans to avoid TNP-contaminated drinking water.
Graphical abstract
✓ 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）