SmartMat
·
2023
·
IF 20.4
Yushan Yang,Kaicong Chen,Yipeng Chen,Chao Wang,Baokang Dang,Yingying Li,Ming Liu,Qingfeng Sun
Combination of flexible multifunctional stealth technology properties such as electromagnetic (EM) and infrared (IR) stealth is crucial to the development of aerospace, military, and electronic fields, but the synthesis technology still has a significant challenge. Herein, we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion (MXCB) sheets with strong high-temperature EM-IR bi-stealth through sequential bridging of hydrogen and covalent bonds. The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility, stretchability, fatigue resistance, and ultrasonic damage. MXCB sheets have a high tensile strength of 795 MPa. Furthermore, MXCB sheets with different thicknesses indicate exceptional high-temperature thermal-camouflage characteristics. This reduces the radiation temperature of the target object (>300°C) to 100°C. The conductivity of MXCB sheet with 3 μm thickness is 6108 S/cm and the EM interference (EMI) shielding value is 39.74 dB. The normalized surface-specific EMI SE absolute shielding effectiveness (SSE/ t ) is as high as 39312.78 dB·cm 2 /g, which remained 99.39% even after 10,000 times repeated folding. These multifunctional ultrathin MXCB sheets can be arranged by vacuum-assisted induction to develop EM-IR bi-stealth sheet.
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Materials
·
2023
·Vol. 16
·期 6
·2277
·
IF 3.4
Si Xu,Shanshan Liang,Bing Wang,Jiali Wang,Meng Wang,Lingna Zheng,Hao Fang,Tingfeng Zhang,Yi Bi,Weiyue Feng
Pre-coating with a protein corona on the surface of nanomaterials (NMs) is an important strategy for reducing non-specific serum protein absorption while maintaining targeting specificity. Here, we present lipoic acid-terminated polyethylene glycol and transferrin bi-functionalized MoS2nanosheets ([email protected]2-PEG NSs) as a feasible approach to enhance cellular uptake.[email protected]2-PEG NSs can maintain good dispersion stability in cell culture medium and effectively protect MoS2NSs from oxidation in ambient aqueous conditions. Competitive adsorption experiments indicate that transferrin was more prone to bind MoS2NSs than bovine serum albumin (BSA). It is noteworthy that single HepG2 cell uptake of[email protected]2-PEG presented a heterogeneous distribution pattern, and the cellular uptake amount spanned a broader range (from 0.4 fg to 2.4 fg). Comparatively, the intracellular Mo masses in HepG2 cells treated with[email protected]2-PEG and MoS2-PEG showed narrower distribution, indicating homogeneous uptake in the single HepG2 cells. Over 5% of HepG2 cells presented uptake of the[email protected]2-PEG over 1.2 fg of Mo, about three-fold that of[email protected]2-PEG (0.4 fg of Mo). Overall, this work suggests that Tf coating enhances the cellular uptake of MoS2NSs and is a promising strategy for improving the intracellular uptake efficiency of cancer cells.Keywords:bi-functionalization;[email protected]2-PEG nanosheets;HepG2 cellular uptake
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Qiang Wang,Mengjie Wang,Li Wen,Wei Zeng,Binghui Ge,Chaofeng Zhang,Yang Yue,Siliang Wang
The emerging aqueous zinc-ion batteries (ZIBs) have received extensive attention and research due to their unique advantages of low cost, safety, and environmental friendliness. However, the development of appropriate cathode materials to improve battery performance remains a major challenge. Herein, a new MXene and Bi (MXene/Bi) composite material is first applied as the (de)intercalation cathode of ZIB. The dispersed MXene nanosheets in the composite materials greatly improve the conductivity and hydrophilicity of the electrode, and prevent the stacking and the volume expansion in the charge/discharge process of 2D Bi fragments. The experimental results show that composite MXene/Bi electrode has remarkable capacity and ultralong life. Next, the good kinetics and (de)intercalation energy storage mechanism of ZIB are revealed through abundant electrochemical tests and ex situ characterization. The quasi-solid-state (QSS) ZIB is also constructed, showing superior electrochemical performance, flexibility, pressure resistance, and heat resistance. Besides, the QSS ZIB can be used directly as a self-powered pressure sensor to monitor the external pressure in real time based on the response current. This study not only demonstrates that MXene/Bi is a potential cathode for ZIBs, but also offers a feasible path to explore and design the next generation of high-performance multifunctional ZIBs.
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Batteries & Supercaps
·
2023
·Vol. 6
·期 5
·e202300055
·
IF 5.7
Meixue Wang,Huijun Li,Xiaoqin Cheng,Shizhen Tian,Xiaomin Wang
Graphical New bismuth anode material : As double encapsulated bismuth-based composite was investigated in a sodium half-cell, exhibiting good cycling stability and high discharge capacity. The introduction of nitrogen-doped carbon and graphene has resulted in a three-dimensional interconnected network structure, rich reaction sites and sites. This structure achieves a high degree of electrode reversibility and increases the electrical capacity. Bismuth (Bi) has promising applications as anode in sodium-ion batteries (SIBs) due to its suitable alloy voltage, unique lattice structure and high volumetric specific capacity. However, the severe structural degradation and poor cycling performance of Bi-anode during cycling limits its practical application. Here, we designed and synthesized graphene-encapsulated nitrogen-doped carbon@bismuth (N−C@Bi/G) composites as anode materials for SIBs by a two-step hydrothermal and thermal treatment method to solve the above problems. The N−C@Bi/G composite anode material exhibits excellent sodium storage performance, high capacity (280 mAh g −1 at 0.1 A g −1 and an initial coulombic efficiency of 78.87 %) and long-term cycling stability (260 mAh g −1 after 1000 cycles at 2 A g −1 ). Electrochemical analysis and DFT calculations show that the fast reaction kinetics of N−C@Bi/G is directly related to the introduction of nitrogen-doped carbon enriching the pore structure and increasing the active sites. Meanwhile, through the aid of in-situ X-ray diffraction (XRD), the reaction mechanism and interphase evolution of N−C@Bi/G composite are revealed, which provides an important theoretical basis for the application of SIBs.
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Processes
·
2022
·Vol. 11
·期 1
·115
·
IF 3.352
Ting Gao,Jingqi Lin,Ke Zhang,Mohsen Padervand,Yifan Zhang,Wei Zhang,Menglin Shi,Chuanyi Wang
Since conventional techniques are ineffective for NO removal at low concentrations, photocatalysis has become attractive in this regard, recently. However, in practice, photocatalytic NO removal has drawbacks such as limited light absorption and the proclivity of producing toxic by-products. To address these issues, novel defective Bi/Bi3NbO7structures with good porosity were fabricated by a solvothermal method and used for enhanced photocatalytic NO removal under visible light irradiation. The morphological and structural properties of the prepared materials were comprehensively analyzed. The optimal photocatalytic activity of pore-defective Bi/Bi3NbO7for NO removal was 60.3%, when the molar ratios of urea and Bi(NO)3•5H2O to pristine Bi3NbO7were 1:25 and 1:2, respectively, under the following operational conditions: NO concentration of 700 ppb, catalyst dosage of 50 mg and irradiation time of 14 min. The induced defects and the surface plasmon resonance (SPR) effect of Bi nanodots made remarkable contributions to improving the photocatalytic NO removal as well as inhibiting the toxic byproduct NO2. The photocatalytic NO removal pathway over the prepared photocatalysts was further mechanistically clarified taking advantage of EPR results and scavenging experiments. Considering the increased NO generation in the atmosphere, this work may provide novel insights for designing effective porous photocatalysts to treat gaseous toxic pollutants.Keywords:photocatalysis;Bi3NbO7;surface plasmon resonance;NO removal;defects
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Materials Research Express
·
2019
·Vol. 6
·期 4
·046532
·
IF 1.449
Chen Chen,Binxu Lan,Kang Liu,Hongbo Wang,Yuxin Deng,Yufei Zuo,Xiaohan Xu,Cheng Chen,Zhen Chen,Ping Luo,Shijie Dong
Herein, we prepared Al–Bi–NaCl composites by mechanical ball milling and investigated the effects of ball milling time on their hydrogen production performance, additionally analyzing energy conversion during ball milling. Subsequently, the effects of Bi and NaCl content and initial temperature on hydrogen production performance were studied. Moreover, the phase, morphology, and elemental composition of these composites and by-products of their hydrolysis were studied by a range of instrumental techniques. An optimal hydrogen yield of 1140 ml g−1 (in 1 h) was obtained at a milling time of 4 h, and the results of instrumental characterization showed that no new phase was formed during ball milling (i.e., Al, Bi, and NaCl were only mechanically mixed) and that the constituent elements were evenly distributed in the composite. Hydrolysis by-products were identified as porous Al(OH)3 and AlO(OH), that is, Bi did not participate in the reaction.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Qi Wang,Hong Wu,Qiaoyuan Gao,Dagang Lin,Yongjie Fan,Ran Duan,Yanqing Cong,Yi Zhang
Plasmonic Bi 0 modified BiOI-Bi 2 O 3 composite (Bi/BiOI-Bi 2 O 3 ) was prepared via in situ UV reduction method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) techniques were carried out to identify the formation of semimetal Bi 0 . The results indicated that the dot-like bismuth particles were originated from the partial reduction of lattice Bi 3+ to Bi 0 by accumulated conduction band electrons in BiOI-Bi 2 O 3 . The as-prepared ternary composite exhibited enhanced visible-light-response, decreased charge transfer impedance and higher charge carrier density relative to unmodified BiOI-Bi 2 O 3 . Due to synergistic effect between plasmonic Bi 0 and BiOI-Bi 2 O 3 heterojunction , dramatically enhanced photocatalytic activity for phenol degradation can be achieved. After 3.5 h visible light irradiation, the value for phenol removal efficiency was ca. 60% and 100% on BiOI-Bi 2 O 3 and Bi/BiOI-Bi 2 O 3 , respectively. The calculated zero-order rate constant on Bi/BiOI-Bi 2 O 3 was 1.7 and 3.9 times that on BiOI-Bi 2 O 3 and Bi 2 O 3 , respectively. In addition to phenol, organic dyes (zwitterionic RhB , cationic MB and anionic Org II) were also used as model pollutants. Pronounced photocatalytic degradation by Bi/BiOI-Bi 2 O 3 can be observed, further confirming the importance of Bi 0 . Trapping experiments using different scavengers indicated that photogenerated holes were major active species during the degradation of phenol. Furthermore, good stability was also observed in 5 successive cyclic runs. This study opens a new strategy for in situ preparation of plasmonic Bi 0 modified composite.
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高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Xiaofang Li,Chen Chen,Wenhua Xue,Shan Li,Feng Cao,Yuexing Chen,Jiaqing He,Jiehe Sui,Xingjun Liu,Yumei Wang,Qian Zhang
An n-type Bi-doped SnSe was synthesized by a facile solution method followed by spark plasma sintering. We used bismuth(III) 2-ethyhexanoate as a cationic dopant precursor, which can absorb on the powder surface and then diffuse into the lattice to realize the substitution of Sn by Bi. A strip structure with low-angle boundary was constructed for effective phonon scattering. With increasing content of Bi, the carrier concentration decreased from 1.35 × 1019 cm–3 (p-type) in undoped SnSe to 4.7 × 1014 cm–3 (n-type) in Sn0.99Bi0.01Se and then increased to 1.3 × 1015 cm–3 (n-type) in Sn0.97Bi0.03Se. The Seebeck coefficient changed from positive to negative and presented n-type conducting behavior in the whole measured temperature range from 300 to 773 K, reaching a maximum absolute value of ∼900 μV K–1 at room temperature and ∼300 μV K–1 at 773 K. Considering the rich variety of metal 2-ethylhexanoates, higher thermoelectric performance is expected by different cationic doping in solution-synthesized nanomaterials.
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高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2023
·
IF 2.7
Xuening Han,Jie Li,Hao Wu,Kai Sun,Yixin Chen,Lijun Jia,Huaiwu Zhang,Pengjie Zhang,Chunyang Wu
In this paper, the Bi-In co-substituted YIG ferrite materials composed of Y 3− x Bi x Fe 4.55 In 0.45 O 12 ( x = 0.0–1.0 with a step of 0.2) were synthesized by a conventional solid-state route. Samples with different Bi 3+ ion contents were sintered at different temperatures. The phase formation, microstructure, dielectric and magnetic properties of samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), impedance analyzer, vibrating sample magnetometer (VSM), and ferromagnetic resonance (FMR). The results showed that Bi 3+ ion substitution could reduce the sintering temperature, increase the bulk density ( d b ), improve the dielectric constant ( ε' = 22.26@100 MHz at × = 1.0) and keep a high saturation magnetization ( 4πM S = 1700–1850 Gs), but led to the increase of the FMR linewidth ( ΔH = 316.21 Oe at × = 1.0).
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高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2022
·
IF 2.712
Meiling Zhong,Jixia Lin,Yudie Yang,Mingzhuo Liu,Guanghua Guo,Dehui Ji,Richao Zhang,Jiali Zhang
Guided tissue regeneration (GTR) membranes have great potential to promote periodontal tissue regeneration and reestablishment. However, the regeneration potential and microbial infection resistance of current GTR membranes still need to be improved. Here, a bi-layered nanofibrous membrane on the basis of poly (lactic-co-glycolic acid) (PLGA)/gelatin with osteogenic and antibacterial functions was fabricated for periodontal tissue regeneration. The antimicrobial layer (AL) of the bi-layered nanofibrous membrane was composed of nanofibrous PLGA/gelatin nanofibers loaded with nano-silver (nAg), while the osteoconductive layer (OL) of the nanofibrous membrane consisted of PLGA/gelatin nanofibers loaded with nano-hydroxyapatite (nHA). The bi-layered nanofibrous membrane was examined by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectrometry (XPS) and X-ray diffractometry (XRD). The results showed that nHA and nAg particles were well evenly loaded or embedded in PLGA/gelatin nanofibers. The cell culture experiments suggested that the bi-layered nanofibrous membrane possessed good cytocompatibility and the OL of the bi-layered nanofibrous membrane possessed an enhanced osteogenic capacity for human osteoblast-like cells (MG63), which was verified by the good cell viability and the increased alkaline phosphatase (ALP) activity, respectively. The results of in vitro antimicrobial study displayed that the AL of the bi-layered nanofibrous membrane possessed an effective antibacterial capability. In conclusion, the prepared bi-layered nanofibrous membrane with osteogenic and antibacterial functions may have great potential for periodontal tissue regeneration and reestablishment.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
N.R. Khalid,Hamid Ishtiaq,Faisal Ali,M.B. Tahir,Sumaira Naeem,A. Ul-Hamid,M. Ikram,T. Iqbal,M. Rizwan Kamal,Hussein Alrobei,Meshal Alzaid,A. Dahshan
The fast pace of industrial growth during the current decade has seen a large family of dyes employed copiously in the production of various products such as paper and ink. These dyes pollute earth's ecosystems. Researchers look at various ways to degrade these dyes including the use of suitable nanomaterials . ZnO is an important semiconductor material that can be employed for this purpose. In this research work, we optimized the photocatalytic capability of ZnO by co-doping it with 1–7 wt% of Bi and N. The synthesized Bi and N co-doped ZnO nanorod samples showed excellent photocatalytic behavior towards Rhodamine-B (RhB). It was confirmed using XRD and SEM that (5, 2.5) wt.% Bi/N co-doped ZnO nanorods exhibited unique morphology and structure. EDX successfully assessed the elemental composition of the synthesized samples. To provide further insight into its microstructure, the HRTEM and SAED analysis were performed. Optical properties were determined using PL and UV–Visible spectroscopy. The prepared nanorod material degraded almost 89% of RhB in 180 min. The superior degradation ability of co-doped ZnO material when exposed to visible portion of sunlight spectrum is credited to the decrease in the recombination rate of charges and an increase in the depth penetration of photons. The degradation efficiency of Bi/N co-doped ZnO material is enhanced due to reduced recombination rate and increased production of number of defects and oxygen vacancies .
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Environmental Science-Nano
·
2021
·Vol. 9
·期 1
·349-360
·
IF 8.131
Cailiang Yue,Changqing Zhu,Wenting Zheng,Jinli Qiu,Zhiling Du,Chen Ling,Fu-Qiang Liu
Highly efficient mineralization of refractory organic pollutants is an admittedly difficult problem for most photocatalytic processes. Herein, a hierarchical type-II heterojunction Bi2MoO6/Bi/BiOBr-x (BMO/Bi/BOB-x) was successfully fabricated via a one-pot solvothermal method. The optimal BMO/Bi/BOB-2 exhibited an ∼80% mineralization ratio of ciprofloxacin under simulated solar irradiation, outperforming most reported photocatalysts. ˙OH was demonstrated to be the dominant reactive species. The ˙OH production capacity of BMO/Bi/BOB-2 increased by 76.2% compared with that of BMO/BOB, highlighting the key role of Bi nanoparticles (Bi NPs). Bi NPs not only induced a strong localized surface plasmon resonance effect to enhance the utilization of visible light, but also acted as an electron mediator to accelerate the separation of e−/h+ pairs. Due to the specific redox potential, the separated h+ and e− could activate H2O and O2 to produce ˙OH synchronously. Overall, this work provided a valuable strategy to design a plasmonic Bi NP-enhanced type-II heterojunction for the efficient treatment of refractory organic wastewater.
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