JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 11
·1-12
·
IF 2.5
Li Fangyuan,Yao Niu,Yuan Huiyu,Cui Junyan,Jia Quanli
The redox properties of electrode materials play a vital role in electrochemical performance. Fabrication of electrode materials with multiple oxidation species is highly desired for ultrasensitive glucose sensing. Herein, multivalent Cu/Cu 2 O/CuO/C (Cu/C) nanocomposites were successfully prepared for non-enzymatic glucose sensing by in situ pyrolysis of Cu metal-organic framework (Cu 3 (BTC) 2 ·3H 2 O, Cu-BTC) at a critical temperature. Structure characterizations showed that the nanocomposites maintained the original morphology of Cu-BTC crystals and exhibited mesoporous structures. Meanwhile, multiple Cu species containing Cu, Cu 2 O and CuO were generated simultaneously, which were tightly pinned on the ligand-derived carbon layers. Thus, under the synergistic effect of multivalent Cu species, mesoporous structure and intense interface contact, the sensing platforms based on Cu/C nanocomposites exhibited good glucose detection performance with a wide linear range of 0.005-2.0 mM, ultrasensitivity of 147.65 μA mM -1 cm -2 , low detection limit of 6.31 μM (S/N = 3), and favorable anti-interference properties and stability. Especially, the Cu/C sensing platform showed excellent recoveries of glucose when used to monitor glucose in real sample of honey. The good electrochemical activities of Cu/C nanocomposites render them promising candidates for sensors and other applications. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2014
·Vol. 30
·期 3
·356-361
·
IF 1.119
Han Pengfei,Yuan Changfu,Xu Junyi,Liu Jin
We reported a dripping solvothermal method for synthesizing metal-organic framework-5(MOF-5). It started from separately dissolving Zn(NO 3 ) 2 and terephthalic acid(H 2 BDC) in dimethyl formamide(DMF), and then dripping one solution into the other. Results of SEM, XRD and laser particle size distribution show that regular cubic-shaped and micro-crystallite powder of MOF-5 can be obtained. The d
0.5 (volume-median-diameter) values are 4.32 μm for particles prepared by dripping Zn(NO 3 ) 2 into H 2 BDC(ZH) and 9.32 μm for those prepared by dripping H 2 BDC into Zn(NO 3 ) 2 (HZ), much smaller than 22.7 μm that of particles prepared by the traditional adding water solvothermal method(L). The standard deviations of the particle size distributions fitted by the GaussAmp model are 2.49, 4.38 and 15.4 respectively for ZH, HZ and L, further revealing narrower size distributions of particles prepared by the dripping method. In addition, the Langmuir specific surface areas are 923 m 2 /g for ZH and 868 m 2 /g for HZ. The TGA results present mass losses of 4.18% and 3.62% at 105 °C, 17.19% and 14.78% at 245 °C, 39.04% and 34.85% at 600 °C separately for ZH and HZ, which correspond to the removal of H 2 O, DMF and the decomposition of MOF-5. This indicates that MOF-5 has a strong adsorption ability for small molecules. Besides, the mass loss of 48.39%(ZH) and 41.02%(HZ) between 400 °C and 600 °C are less than the theoretical value of 57.81% for MOF-5 decomposition to ZnO, suggesting that an impure phase with an extra amount of ZnO may exist in the cavities of MOF-5.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·
IF 1.6
Fan Zheyu,Cheng Xiankui,Sheng Guodong
The combination of metal − organic frameworks (MOFs) and magnetic nanoparticles has been demonstrated their prospective for sequestration of heavy metal or radionuclides. In this work, five kinds of magnetic metal − organic framework including ZIF-67@Fe 3 O 4 , ZIF-8@Fe 3 O 4 , CuBTC@Fe 3 O 4 , MIL101(Fe)@Fe 3 O 4 , and MOF74@Fe 3 O 4 , was prepared and used as novel highly-efficient scavengers for the capture of U(VI) from aqueous environment. These magnetic nanocomposites before and/or after U(VI) capture were characterized by FTIR, SEM–EDS, XRD, TEM, BET, and XPS analyses. A batch technique was applied for the capture of U(VI) using these magnetic nanocomposites at different operating parameters. The isotherm and kinetic data were more accurately fitted by the Langmuir and pseudo-second-order models, respectively. The ZIF-8@Fe 3 O 4 and ZIF-67@Fe 3 O 4 exhibit the potential to capture U(VI) from aqueous solutions with a maximum monolayer adsorption capacity of 441 and 1058 mg/g –1 , respectively, by fitting the equilibrium data to the Langmuir model. The excellent adsorption capacity and the response to the magnetic field made these novel nanocomposites auspicious candidates in nuclear waste management.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 12
·1-10
·
IF 2.8
Liu Chengyi,Du Guicai,Guo Qunqun,Li Ronggui,He Hongwei,Li Changming
Polylactic acid (PLA) is a kind of widely used, biodegradable, biomass polymer material, and the PLA fibrous material with high antibacterial efficiency has attracted more and more attention. In this article, the electrospinning (e-spinning) technique was employed to fabricate PLA nanofiber membrane and by adding the reducing natural rosmarinic acid (RosA) and graphene oxide (GO) into the e-spinning solution, it was found that RosA and GO reacted to a certain extent, which led to a stable e-spinning solution system. After carried out e-spinning, the as-prepared fiber of PLA/Rosa0.1/GO was thinner in average diameter, 520 nm, lower than those of pure PLA or PLA/RosA. The strength of the fibrous membrane was enhanced, reaching 2.4 times of pure PLA one, and its water contact angle decreased from 137° to 123°. At the same time, the as-obtained membrane of PLA/Rosa0.1/GO had high porosity (82.8%) and filtration efficiency (91.0%), with high QF value of 0.077 Pa -1 . More importantly, due to the synergy of RosA and GO, the antibacterial efficiency has been greatly improved. This electrospun nanofiber membrane has promising applications in personal protective equipment and air filtration industry.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 38
·期 6
·1255-1261
·
IF 1.6
Tan Shifeng,Tu Wenmao,Pan Hongfei,Zhang Haining
Catalysts consisting of Zeolite imidazolyl ester skeleton-67 (ZIF-67) and graphene oxide (GO) were fabricated through a solvothermal method, followed by etching ZIF-67 with oxygen-rich functional groups on GO in a reduction atmosphere at 400 °C. During this process, an open type of cobalt metal center was formed by the partial vaporization and oxidation of ZIF-67, further reducing to Co and partially combining with oxygen species to amorphous CoO x . Benefiting from the rich functional N, and metal/oxides active centers derived from the calcination process, the synthesized Co/CoO x @NSG-400 showed a low OER overpotential of 10 mA·cm −2 at 298 mV, and an ORR half-wave potential of 0.8 V, which demonstrated its excellent bifunctional catalytic activity. Such a controllable calcination strategy with high yields could be expected to pave the way for synthesizing low-cost and efficient bifunctional electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Research
·
2023
·Vol. 27
·期 1
·1-17
·
IF 11.3
Zhang Han,Hu Liangshan,Xiao Wei,Su Yanqiong,Cao Donglin
Background Melanoma is a highly aggressive form of skin cancer with increasing incidence and mortality rates. Chemotherapy, the primary treatment for melanoma, is limited by hypoxia-induced drug resistance and suppressed immune response at the tumor site. Modulating the tumor microenvironment (TME) to alleviate hypoxia and enhance immune response has shown promise in improving chemotherapy outcomes.Methods In this study, a novel injectable and in situ forming hydrogel named MD@SA was developed using manganese dioxide (MnO2) nanosheets pre-loaded with the chemotherapy drug doxorubicin (DOX) and mixed with sodium alginate (SA). The sustainable drug delivery, oxygen generation ability, and photothermal property of MD@SA hydrogel were characterized. The therapeutic efficacy of hydrogel was studied in B16F10 in vitro and B16F10 tumor-bearing mice in vivo. The immune effects on macrophages were analyzed by flow cytometry, real-time quantitative reverse transcription PCR, and immunofluorescence analyses.Results The MD@SA hydrogel catalyzed the tumoral hydrogen peroxide (H2O2) into oxygen, reducing the hypoxic TME, down-regulating hypoxia-inducible factor-1 alpha (HIF-1α) and drug efflux pump P-glycoprotein (P-gp). The improved TME conditions enhanced the uptake of DOX by melanoma cells, enhancing its efficacy and facilitating the release of tumor antigens. Upon NIR irradiation, the photothermal effect of the hydrogel induced tumor apoptosis to expose more tumor antigens, thus re-educating the M2 type macrophage into the M1 phenotype. Consequently, the MD@SA hydrogel proposes an ability to constantly reverse the hypoxic and immune-inhibited TME, which eventually restrains cancer proliferation.Conclusion The injectable and in situ forming MD@SA hydrogel represents a promising strategy for reshaping the TME in melanoma treatment. By elevating oxygen levels and activating the immune response, this hydrogel offers a synergistic approach for TME regulation nanomedicine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·
IF 9.9
Wang Jiaen,Song Tianliang,Ming Wei,Yele Moxi,Chen Longfu,Zhang Hao,Zhang Xiaojuan,Liang Benliang,Wang Guangsheng
The high power density and intelligence of next-generation flexible electronic devices bring many challenges to fabricate flexible composite films with electromagnetic interference (EMI) shielding effectiveness (SE) property and excellent toughness via a simple method. Herein, inspired by the layered structure and biopolymer matrix networks in natural nacre, nacre-like layered Ti 3 C 2 T x (MXene)/aramid nanofiber (ANF) films were fabricated through sol-gel, vacuum-assisted filtration, and hot-pressing. Three-dimensional (3D) interconnected aramid nanofibers networks between adjacent layered MXene result in an ultralong strain-to-failure of the film. Even though the functional filler MXene contents are as high as 60 wt.% and 70 wt.%, the strain-to-failure of the films could reach astonishing values of 18.34% ± 1.86% and 14.43% ± 1.26%, respectively. And the tensile strength could maintain about 85 MPa. Excitingly, with such a high filler, the film can also withstand double folding and vigorous rubbing without damage, which could better adapt to a harsh application environment. The result means that this work provides a convenient way to prepare other high functional filler composite films with excellent mechanical performance. The EMI SE values could reach 45 and 52.15 dB at 60 wt.% and 70 wt.% MXene in 8.2–12.4 GHz. Meanwhile, the films have prominent Joule heating properties, high sensitivity (< 15 s), small voltage operation (0.5 V), and high operation constancy (1300 s). Therefore, nacre-inspired MXene/ANF composite films in this work have ability to apply in many areas including communication technology, military, and aerospace.
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 12
·4639-4649
·
IF 8.1
Li Shuangshuang,Du Yunmei,Wang Mengmeng,Liu Jie,Li Bin,Gu Yuanxiang,Wang Lei
Nitride modification is focused on boosting reaction kinetics by optimizing the hydrogen evolution reaction (HER) pathway of nitrides. This study adopted a creative co-doping strategy of using a P-anion and a Ce-cation to construct a P,Ce-FeNi 3 N/nickel foam (NF) electrode. At an overpotential of 200 mV, the well-designed P,Ce-FeNi 3 N/NF electrode showed a current density of 340 mA cm −2 , which was twice that of the commercial Pt/C@NF electrode (174 mA cm −2 ). Theoretical calculations revealed that unlike the single Ni active site in FeNi 3 N/NF, P,Ce-FeNi 3 N/NF possessed two active sites Ni and P. As a result, reaction kinetics during the alkaline HER process was considerably optimized. Furthermore, the assembled NiFeCe-layered double hydroxides/NF‖P,Ce-FeNi 3 N/NF cell only needed a voltage of 1.537 V to achieve a high current density of 500 mA cm −2 . Overall, this study provides a new strategy for achieving superior electrocatalytic performance of nitrides by optimizing and improving reaction kinetics.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 11
·1-10
·
IF 2.8
Han Linting,Yang Xiaofeng,Wang Hui,Chen Zhiping,Jing Hongxia,Zhang Lixin
As one of the most promising solid electrolytes, Li 7 La 3 Zr 2 O 12 (LLZO) has received great attention in the field of all solid-state lithium-ion batteries. However, LLZO, as a solid material, has far less contact with the electrode than original liquid electrolyte with wettable properties in practical applications. In this study, porous LLZO solid electrolytes were fabricated by both mechanical and dispersive mixing methods with modified kapok fibers as pore-forming agents. The results show that the pores of LLZO prepared by dispersive mixing are more homogeneous than that prepared by mechanical mixing, and the ionic conductivity of LLZO fabricated by dispersive mixing remains in the same order of magnitude as the ionic conductivity of the original LLZO solid electrolyte. At the same time, the formation of ordered pore channels for porous LLZO is conducive to increasing the contact area between the solid electrolyte and the electrode material, which lays a foundation for reducing the impedance of solid electrolyte.
✓ 已验证
产品关联
DOI
高影响因子
Microsystems & Nanoengineering
·
2023
·Vol. 9
·期 1
·1-10
·
IF 7.9
Li Guanglei,Chen Yao,Liu Fei,Bi Wenhua,Wang Chenxin,Lu Danfeng,Wen Dan
It is important to monitor the intra-/extracellular concentration of hydrogen peroxide (H 2 O 2 ) in biological processes. However, miniaturized devices that enable portable and accurate H 2 O 2 measurement are still in their infancy because of the difficulty of developing facile sensing strategies and highly integrated sensing devices. In this work, portable H 2 O 2 sensors based on Pt-Ni hydrogels with excellent peroxidase-like and electrocatalytic activities are demonstrated. Thus, simple and sensitive H 2 O 2 sensing is achieved through both colorimetric and electrochemical strategies. The as-fabricated H 2 O 2 sensing chips exhibit favorable performance, with low detection limits (0.030 μM & 0.15 μM), wide linearity ranges (0.10 μM–10.0 mM & 0.50 μM–5.0 mM), outstanding long-term stability (up to 60 days), and excellent selectivity. With the aid of an M5stack development board, portable visual and electrochemical H 2 O 2 sensors are successfully constructed without complicated and expensive equipment or professional operators. When applied to the detection of H 2 O 2 released from HeLa cells, the results obtained by the developed sensors are in good agreement with those from an ultraviolet‒visible spectrophotometer (UV‒vis) (1.97 μM vs. 2.08 μM) and electrochemical station (1.77 μM vs. 1.84 μM).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Xu Jie,Xue Xiong-Xiong,Shao Gonglei,Jing Changfei,Dai Sheng,He Kun,Jia Peipei,Wang Shun,Yuan Yifei,Luo Jun,Lu Jun
The thriving field of atomic defect engineering towards advanced electrocatalysis relies on the critical role of electric field polarization at the atomic scale. While this is proposed theoretically, the spatial configuration, orientation, and correlation with specific catalytic properties of materials are yet to be understood. Here, by targeting monolayer MoS 2 rich in atomic defects, we pioneer the direct visualization of electric field polarization of such atomic defects by combining advanced electron microscopy with differential phase contrast technology. It is revealed that the asymmetric charge distribution caused by the polarization facilitates the adsorption of H*, which originally activates the atomic defect sites for catalytic hydrogen evolution reaction (HER). Then, it has been experimentally proven that atomic-level polarization in electric fields can enhance catalytic HER activity. This work bridges the long-existing gap between the atomic defects and advanced electrocatalysis by directly revealing the angstrom-scale electric field polarization and correlating it with the as-tuned catalytic properties of materials; the methodology proposed here could also inspire future studies focusing on catalytic mechanism understanding and structure-property-performance relationship.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·
IF 9.9
He Xiaowei,Wang Tianshuai,Tian Lidong,Zhang Qiuyu
Heterostructure engineering by coupling different nanocrystals has received extensive attention because it can enhance the reaction kinetics of the anode of sodium-ion batteries (SIBs). However, constructing high-quality heterostructure anode materials through green and environmentally friendly methods remains a challenge. Herein, we have proposed a simple one-step method by recycling the electronic waste metal materials to synthesize the Cu 1.94 S/ZnS heterostructure materials. Combined with the experimental analysis and first principle calculations, we find that the synergistic effect of different components in heterostructure structures can significantly enhance the reversible capacity and rate performance of anode materials. Based on the constructed Cu 1.94 S/ZnS anode, we obtain a superior reversible capacity of 440 mAh·g −1 at 100 mA·g −1 and 335 mAh·g −1 after 3000 cycles at 2000 mA·g −1 . Our work sheds new light on designing high-rate and capacity anodes for SIBs through the greenness synthesis method.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）