JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 6
·1411-1421
·
IF 2.5
Ma Qingyang,Liu Dian,Wang Bo,Liu Wenyi,Xiong Guoyao,Liu Jinping
Despite their non-flammability, low processing cost and wide electrochemical stability window, solid-state polymer electrolytes still exhibit certain challenges, such as high operating temperature and low room-temperature ionic conductivity. Cellulose acetate (CA) is a common natural polymer derivative, which is promising as a filler in polymer electrolytes due to its rich surface functional groups, superior mechanical properties and high porosity. Herein, CA is incorporated into a unique polymer-in-salt electrolyte based on lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) to design a composite polymer electrolyte (PLCA). The influence of CA content on the overall performance of PLCA is investigated. With 10 wt% of CA, PLCA exhibits high room-temperature ionic conductivity of 4.33 × 10 −4 S cm −1 , high Li-ion transference number of 0.60 and a wide electrochemical stability window (4.8 V). The resulting LiFePO 4 |Li solid-state lithium battery delivers a specific discharge capacity of 160.17 mAh g −1 at 0.2 C, with stable cycling ability and good rate capability. CA is found to promote the dissociation of lithium salt, reduce the crystallinity of polymer and further create a new Li-ion transport pathway in PLCA, responsible for the battery performance improvement. Our work provides an opportunity to design high-performance composite polymer-in-salt electrolytes for advanced solid-state batteries.
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Food Analytical Methods
·
2023
·Vol. 16
·期 4
·677-688
·
IF 2.9
Hui Yuanyuan,Peng Haishuai,Li Linqiang,Zhao Aiqing,Yang Ding,Wang Weizhe,Wang Bini
Rapid, accurate, sensitive, and real-time detection of streptomycin (STR) residues in dairy products is very important. In this work, for the first time, the gold nanoflower/polyethyleneimine-functionalized metal organic framework (AuNF-PEI-MIL-101(Cr)) nanocomposites were synthesized via hydrothermal method and characterized using various techniques (SEM, TEM, XRD, FT-IR, and XPS). Then, a novel electrochemical aptasensor was constructed for the detection of STR based on AuNF-PEI-MIL-101(Cr) nanocomposites. The gold electrode (GE) modified with AuNF-PEI-MIL-101(Cr) can immobilize a large number of thiolated STR aptamer via the Au–S bond. When the target STR was in the presence, the current signal was reduced due to the specific binding of STR towards the aptamer. The results indicated that the aptasensor had a wide linear range towards STR (0.01–400 nM) with a low detection limit of 0.003 nM under the optimal conditions. Moreover, the aptasensor exhibited good selectivity, reproducibility, and stability. In addition, the STR in the cow, sheep, and goat milk samples was detected by the spiked recovery method, and satisfactory results were obtained. The method provides an efficient pathway for the sensitive detection of STR.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·1-10
·
IF 2.8
Zhou Jintao,Zang Yue,Wang Yu,Chu Liang,Li Guodong,Xu Rui,Yan Wensheng
Silver nanowires have great development potential in the field of transparent electrodes, and their optoelectronic properties are closely related to the morphology and composition. During the synthesis of polyol method, the aspect ratio of AgNWs can be tailored using PVP with different molecular weights, and the diameter of AgNWs can be tuned by incorporating halides. Here, the synergistic effect of Cl − and Br − in the mixed PVP system were deeply investigated by adjusting the concentration ratio of Cl − and Br − . The growth mechanism of silver nanowires was studied by monitoring the acidity of the reaction process. It was found that under the assistance of PVP with different molecular weights, the coordination of Cl − and Br − greatly increased the activation energy of the reaction, which played a key role in the nucleation and growth of AgNWs. As a result, high-quality AgNWs with an average length of 35.7 μm and an average diameter of 67 nm were synthesized at the optimized concentration ratio of Cl − and Br − . Finally, the synthesized silver nanowires were deposited as conductive films on glass to obtain high-performance transparent electrode with a sheet resistance of 22.38 Ω/sq and transmittance of 83.95%.
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JOURNAL OF POROUS MATERIALS
·
2023
·Vol. 30
·期 4
·1385-1393
·
IF 2.6
Qiao Jian,Shi Renqiang
Highly porous ceramics are of interest for various industrial applications, including filtration, supports for catalysts and biomedical applications, and insulating materials. In this study, porous mullite materials were fabricated utilizing the direct foaming-gelcasting approach with industrial-grade mullite powder and different sintering additives as the main starting materials. The phase compositions, pore microstructures, mechanical, thermal and dielectric properties were investigated in order to elucidate the relationships between the structure and performance of the porous materials. The results indicated that the porous mullite materials contained a hierarchical pore structure including interconnected and approximately spherical cells (40–230 μm) with no preferred orientation, along with small pores (5–40 μm) within the skeleton structure. The developed porous ceramics showed thin struts, large cells and internal windows, and a higher degree of total porosity. The porous mullite materials prepared with the addition of sintering aids (1 wt% SiO 2 and 2 wt% TiO 2 ) exhibited high porosity (~ 83%), good compressive strength (4.6–5.3 MPa) and low dielectric constant (1.5–2.0). Good thermal insulation and low dielectric loss are also available. These porous mullite materials are particularly applied for broadband microwave-transparent radome structures.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 2
·1-9
·
IF 5.7
Yang Qiaoli,Wu Dan,Aziz Ayesha,Deng Sangsang,Zhou Lei,Chen Wei,Asif Muhammad,Wang Shenqi
The development of a novel colorimetric method is reported, using vB_YepM_ZN18 phages along with AuPt nanozyme for the sensitive detection of Y. pseudotuberculosis. The phage used in this work has been extracted from hospital sewer water and is highly specific toward Y. pseudotuberculosis . The synthesized AuPt NPs possess peroxidase-like activity, which is suitable in the development of nanozyme based detection system. Furthermore, phages@MB and AuPt@phages are added into the bacterial samples for co-incubation, forming an intercalated complex. The magnetic separation and absorbance analysis of enzymatic reaction are carried out for the detection of targeted bacteria. The proposed method has a limit of detection of 14 CFU/mL, a wide linear range from 2.50 × 10 1 ~ 2.50 × 10 7 CFU/mL and the assay completion time is 40 min. Benefitting from the outperformance of this sensor, we have successfully employed the developed sensing platform for the detection of Y. pseudotuberculosis in food industry and hospital specimens. Graphical Abstract
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CATALYSIS LETTERS
·
2023
·Vol. 153
·期 12
·3837-3845
·
IF 2.8
Wang Xue,Duan Zuqin,Wei Richu,Lei Qian,Chen Honglin
Trioxane (TOX), which is usually produced from formaldehyde catalyzed by acid-catalysts, is an important polymerizing monomer to produce high-performance plastics polyoxymethylene polymers (POMs). In order to reduce the separation cost and increase the catalytic activity, hierarchical Beta zeolites with different pore size were synthesized by PDDA and used for TOX produce from formaldehyde in this work. Hierarchical Beta zeolites’ average pore size increased with the increasing of PDDAs’ molecular weight. Compare to conventional Beta zeolite, it exhibited a higher catalytic performance with 95.13% selectivity and 2118 g/kg/h space–time yield of TOX due to its excellent diffusion performance from extra mesopore. The HCHO conversion and space–time yield of TOX increase first and then decrease with the pore size increasing. Further research showed that the decrease of catalytic activity is mainly due to the increase of extra-framework Al percent. This work illustrates the influence of both pore size and extra-framework Al content in hierarchical Beta zeolites for TOX produce from formaldehyde reaction. Graphical Abstract
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Cancer Nanotechnology
·
2023
·Vol. 14
·期 1
·1-21
·
IF 5.7
Luo Wenli,Li Zhaojian,Zhang Ling,Xie Xingyi
Background Due to their porous structure and capability to degrade under acidic conditions, CaCO3 nanoparticles in vaterite form can be used as carriers to effectively deliver drugs to low-pH sites such as tumors. The usually used intravenous administration requires long-term vaterite phase and colloidal stability for storage and blood circulation. While passive accumulation in tumors can be achieved via the enhanced permeation and retention effect, active accumulation requires reactive groups on vaterite nanoparticles to conjugate targeting molecules. Both requirements are hard to achieve in one simple and economical vaterite formulation. Herein, we used polyethylenimine (PEI)-based CO2 adduct as both a CO2 source and a template for vaterite mineralization to generate PEI-CO2@CaCO3 colloidal particles, with reactive amino groups from the PEI template.Results The obtained nanoparticles with a hydrodynamic diameter of 200–300 nm have a vaterite phase and colloidal stability in an aqueous solution for over 8 months. These nanoparticles could effectively load anticancer drug doxorubicin via coprecipitation and be surface-modified with polyethylene glycol (PEG) and folic acid for long-term blood circulation and tumor targeting purposes, respectively. After being endocytosed, the PEI-CO2 adduct accelerates the dissolution of drug-loaded nanoparticles to generate CO2 bubbles to break the lysosomes, leading to rapid doxorubicin delivery inside tumor cells. The degradation of PEI-CO2 in the CaCO3 nanoparticles could also release PEI and CO2 and may contribute to the disruption of normal cellular functions. As a result, the drug-loaded PEI-CO2@CaCO3 nanoparticles strongly suppressed tumor growth in mice with HeLa tumor xenografts.Conclusion sA new and effective vaterite drug carrier for anticancer therapy has been developed using PEI-CO2 adduct as both a CO2 source and vaterite template for CaCO3 mineralization. This delivery system illustrates an application of CO2 generation materials in drug delivery and has the potential for further development.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 5
·2209-2221
·
IF 4.5
Li Jing,Liu Jinshui,Zhang Hongxing,Li Ning,Meng Yuanchao,Chen Yuxun
With the rapid evolvement of microelectronic devices, the accompanying high amount of heat should be transferred in time by the thermal management system to ensure the desired performance. The design of the thermal management system that possesses high thermal conductivity with flexibility is still a challenge that needs to be overcome. Here, we propose a two-step liquid-phase repairing method using hydriodic acid to remove the defects from large graphene oxide sheets produced by a modified Hummers method to make the structure intact. Compared to thermally reducing method, our method can work under much lower temperature so that it is easier to apply in mass production with much better energy conservation effects. In our research, transverse dimensions of the graphene oxide sheets with range from 50 to 270 μm were obtained by a modified Hummers method, which effectively reduces the interlayer thermal resistance; then flexible, highly thermally conductive graphene films can be developed by a two-step liquid-phase repairing method with hydriodic acid. This process produces a flat reduced graphene oxide film with a powder-free surface that is highly thermally conductive and flexible, can be folded at 180° for 1000 times without breaking and has a thermal diffusion coefficient of 1737 mm 2 s −1 . Multifunctional reduced graphene oxide graphene films can easily transfer large amount of heat from miniaturised, densely packed electronics for efficient thermal management.
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POLYMER BULLETIN
·
2023
·Vol. 80
·期 12
·12865-12879
·
IF 3.2
Zhang Dawei,Wang Jiaming,Ren Lu,Meng Xiangchun,Luan Boyi,Zhang Yumin
The existence of fine oil droplets that are difficult to coalesce greatly reduces the oil–water separation efficiency of alkali‒surfactant‒polymer (ASP) flooding-produced water. In order to improve the oil–water separation efficiency and promote the reinjection of ASP-produced water, a novel cationic graft copolymer CDC was obtained by ultrasonically assisted copolymerization of chitosan and dimethyl diallyl ammonium chloride under the initiation of cerium ions. The copolymer CDC was characterized by FT-IR, XRD, TGA and SEM, and it was confirmed that the grafting reaction proceeded successfully. The flocculation effect of copolymer CDC on ASP-produced water (Nan 4–8, pH = 7.83; Sanyuan-6, pH = 9.95) was investigated. Copolymer CDC has better oil removal rate (90.5%) and light transmittance (95.25%) to Nan 4–8 produced water compared with Sanyuan-6-produced water. It has a better oil removal effect when the initial pH of produced water is 6–7 and the temperature is 30 °C. After the addition of CDC, the large-diameter oil droplets in produced water will coalesce and separate. It may be that under weak acid or neutral conditions, the electrostatic attraction of produced water is enhanced, compressing the double electron layer of oil droplets, and destroying the stability of oil droplets. In addition, the hydrophobic effect of –CH=CH 2 in CDC molecules increases the hydrophobic association between molecules and increases the probability of oil droplet collision during the flocculation process.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 4
·1237-1244
·
IF 1.6
Xi Wenke,Zhang Ge,Xue Jingquan,Li Juan,Liu Yu,Wang Jianjun,Yang Wenjiang
Multimodal imaging has become a trend in the development of molecular imaging. For SPECT/MRI dual-modality imaging, we developed a SPECT/MRI dual-modality probe based on superparamagnetic iron oxide nanoparticles. RGDyk peptide and DTPA chelator were used to realize the functionalization of nanoparticles. Both SPECT imaging and T2-weighted MR imaging in vivo on 4T1 tumor-bearing mice showed targeting of the probe, demonstrating the potential of the SPECT/MRI dual-modality probe as a tool for tumor evaluation and diagnosis.
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MICROCHIMICA ACTA
·
2022
·Vol. 190
·期 1
·1-11
·
IF 6.408
Xu Yixuan,Shi Xuerong,Ran Fanpeng,Zhang Ziqi,Phipps Josh,Liu Xiaoyan,Zhang Haixia
A novel Tb-doped Eu-based metal–organic framework (Eu-MOF@Tb) has been developed by incorporating hexanuclear europium cluster and 2,2′-bipyridine-5,5′-dicarboxylic acid as well as coordination with Tb(III). Owing to the diverse coordination status of Tb(III) and Eu(III) in MOF, antenna effect emission from Tb(III) can be invoked by dipicolinic acid (DPA), but the luminescence originating from Eu(III) remains unchanged. Taking advantage of this phenomenon, a ratiometric luminescent method for detection of DPA, a biomarker for Bacillus subtilis spores, was developed through differential sensitization toward lanthanide ions. This analysis method allowed for the detection of DPA in the 0.2–10 μM concentration range, with a detection limit of 60 nM. It was further validated by spiked recoveries (89.3–110%) of real-world samples with RSD values in the range 3.9–11%. Alongside this, a paper indicator test was prepared for naked-eye detection of DPA via a dose-sensitive color evolution from red to green under UV light. The effectiveness of the proposed approach was explored in the detection of bacterial spores in real biological and environmental samples and indicated great potential for applications as a real-time monitoring system against the anthrax threat. Graphical Abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 12
·34636-34648
·
IF 5.19
Zheng Zhijuan,Xu Ke,Lu Feifei,Zhong Baohua,You Lijun,Xiong Weijie,Tang Ting,Wang Shaoyun
A magnetic covalent organic framework Fe 3 O 4 @BM was prepared with melamine and 4–4′-biphenyldialdehyde as monomers and used as adsorbent for Ag NP removal. Fe 3 O 4 @BM was characterized by zeta potential analysis, transform infrared spectrometry, X-ray diffraction, thermogravimetric analysis, contact angle, and N 2 adsorption–desorption. Fe 3 O 4 @BM possessed plentiful amino groups, positive potential, and rapid separation performance, making it a promising adsorbent for silver nanoparticles. The adsorption process followed the pseudo-second-order kinetic equation and Langmuir isotherm model. The maximum adsorption capacity of Ag NPs calculated by the Langmuir isotherm model was 544.9 mg/g. The adsorption product Fe 3 O 4 @BM@Ag could be recycled and efficiently catalyze the degradation of 4-nitrophenol within 6 min. Meanwhile, the recycled Fe 3 O 4 @BM@Ag could also be used as a surface-enhanced Raman substrate for DTNB detection, and the limit of detection of DTNB reached as low as 10 –7 mol/L. This work prepared a promising adsorbent Fe 3 O 4 @BM for Ag NP adsorption and provided a sustainable approach for the recycling of the adsorption product Fe 3 O 4 @BM@Ag.
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