JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2023
·Vol. 332
·期 10
·4167-4177
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IF 1.6
Peng Yinyin,Pan Ting,Chen Chuang,Zhou Mi,Liu Derong,Feng Jian,Xiong Wei,Liu Ning,Yuan Guoyuan
In this work, MOFs materials functionalized (HC-MOFs) with heterocyclic ligands (thiophene-TPC, pyrrole-PCA and furfural-FUR) were prepared by a one-step method and used for cobalt ion separation studies. The results showed that the maximum adsorption of cobalt ions by the three adsorbents was 141.0 mg/g (UiO-66-TPC), 146.0 mg/g (UiO-66-PCA), and 150.6 mg/g (UiO-66-FUR), respectively, at pH 8.3 and a temperature of 298 K. In addition, The HC-MOFs showed good stability under different doses (0 ~ 200 kGy) of γ-ray irradiation and have great potential for application in the separation of practical radioactive wastewater containing 60 Co.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 4
·1-17
·
IF 20.1
Hou Chunping,Xie Haidong,Qu Yuqing,Tian Hui,Jiang Jingying,Lu Hui,Yang Shaolin,Ma Yong
Silicon oxide (SiO x ) is considered to be one of the most promising anodes of lithium-ion batteries for its advantageous capacity and abundant natural resources. However, the practical application of SiO x is facing great challenges due to its low conductivity and poor cycle performance. In order to accelerate the commercial application of SiO x , we constructed a pitch pyrolytic carbon rigid coating and a highly conductive polyvinyl alcohol/polyethyleneimine/carbon nanotubes (PVA/PEI/CNTs) flexible coating on the surface of micron-sized SiO x . The synergistic effect of the double coating enhances the conductivity of SiO x , reduces the strain stress caused by the volume change of SiO x , prevents the particles from breaking away from the current collector, and maintains the structural integrity of SiO x under long-term cycling. The obtained SiO x /E@CPPC anode exhibits high initial coulombic efficiency (73.91%), excellent cycle stability (645.8 mAh·g −1 after 700 cycles at 0.5 A·g −1 ) and excellent rate performance (407.1 mAh·g −1 at 5 A·g −1 ). The double coating makes SiO x /E@CPPC composites have a good application prospect in lithium-ion batteries.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 21
·1-10
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IF 2.8
Yu Hongquan,Gao Xiao,Huang Chenchen,Liu Shimin,Chen Baojiu,Xu Sai,Zhang Yong,Zhao Hong
CsPbCl 3 and Mn:CsPbCl 3 nanocubes/nanorods were prepared by a hot injection technique. The crystal structure, size and morphology of the CsPbCl 3 and Mn:CsPbCl 3 samples were measured by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The edgelengths of the nanocubes and the length and width of the nanorods of CsPbCl 3 are between tens and hundreds of nanometers. The size and morphology of Mn:CsPbCl 3 are similar to those of CsPbCl 3 . The introduction of Mn 2+ ions led to little change in the CsPbCl 3 host structure. Their electrochemical properties for LIB application were tested by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. The introduction of a small amount of Mn 2+ ions can improve the structural stability of CsPbCl 3 during charge–discharge cycles because the Mn 2+ part replaces the Pb 2+ ions of CsPbCl 3 . Thus, Mn:CsPbCl 3 shows high discharge specific capacities, excellent cyclic performance, and lower electrochemical impedance values than CsPbCl 3 in LIB applications.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 10
·4291-4316
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IF 3.3
Liu Huadong,Du Kezhen,Sun Hao,Li Hewei
Herein, we have successfully prepared multifunctional nitrogen–boron co-doped carbon quantum dots (N,B-CQDs) with excellent performance by a one-step hydrothermal method and further applied them to the design of highly efficient fluorescent probes and visible light responsive photocatalysts. N,B-CQDs have excellent selectivity and high sensitivity to Fe 3+ and Hg 2+ , with LODs of 1.8 μM and 0.34 μM, respectively. The experimental results show that the fluorescence quenching mechanism of Fe 3+ and Hg 2+ detected by N,S-CQDs is the result of dynamic quenching and static quenching. Besides, BiOCl modified by N,S-CQDs(BiOCl/N,B-CQDs) was prepared by one-step hydrothermal method, and the morphology of catalysts and the adhesion of N,B-CQDs were observed by several scientific methods. The photocatalytic results showed that the degradation rate of RhB by BiOCl/N,B-CQDs was up to 99.4% under optimal conditions, which was higher than that of BiOCl (80%). Free radical quenching experiments proved that ·OH and ·O 2 − were the main active substances in the reaction process. Finally, the aim of this study is to offer a novel approach to developing multi-function CQDs as a sensor for metal ions and their modified composites as visible light-induced photocatalysts for the effective detection and degradation of contaminants.
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JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 11
·7193-7207
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IF 2.1
Yuan ChongXiao,Zhang Chao,Yang Cheng,Wu Fuling,Xiao Shibing,Sun Huajun
Flexible wearable sensing devices are in great demand for self-powered systems. In this study, we fabricated fiber films of poly(vinylidene fluoride) (PVDF) matrix embedded with modified lead zirconate titanate nanoparticles (PZT NPs) using the electrospinning process. Each fiber film was cut into small pieces of 2 × 2 cm 2 , and pairs of pieces were pressed with a hot-pressing method. Modified PZT NPs with a high piezoelectric coefficient were embedded in PVDF fibers as a piezoelectric-reinforcing phase, which promoted the formation of the polar β phase in PVDF. The embedded PZT NPs affected the distribution of the polarized electric field and formed a local electric field between two PZT NPs, which promoted the polarization of PVDF, thereby enhancing the piezoelectric properties of PVDF/PZT NPs fiber films. The piezoelectric coefficient ( d 33 ) of the PVDF/PZT NPs fiber films embedding 4 wt.% PZT NPs showed the most significant enhancement, from 12 pC/N for neat PVDF to 21 pC/N, which is an approximately 75% improvement. The results of this work demonstrate the great potential application of piezoelectric composite fiber films in flexible wearable sensing devices.
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APPLIED COMPOSITE MATERIALS
·
2023
·Vol. 30
·期 6
·1929-1947
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IF 2.3
Chang Kai,Qin Yan,Zou Zhenyue,Huang Zhixiong
Oxidation at high temperatures impairs the properties of carbon fiber, limiting its application in thermal protection materials. In this work, alumina fiber hybrid carbon fiber reinforcements (Al 2 O 3 f-CF) were designed to improve the high-temperature oxidation resistance of carbon fiber, and Al 2 O 3 f-CF hybrid fiber reinforced ceramicizable phenolic resin matrix composites (ACFRP) were prepared to investigate thermal stability, mechanical properties, ablation resistance, and interface evolution at high temperatures. The results showed that after being treated at 1600 ℃ for 10 min, the flexural strength reached 43.74 MPa, which increased by 98.1%. The linear ablation rate and mass ablation rate of ACFRP were 0.06 mm/s and 0.056 g/s, respectively. The interface analysis showed that the coating of alumina fiber protected the carbon fiber well at high temperatures. Fiber hybrid provides a simple and effective method to improve the high-temperature oxidation resistance of carbon fiber.
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Science China-Materials
·
2023
·Vol. 67
·期 1
·272-278
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IF 8.1
Zhang Yajun,Han Meikang,Hu Rongxiang,Zhang Peigen,Pan Long,Sun ZhengMing
Constructing three-dimensional (3D) porous structures is an effective method to improve microwave absorbing performance due to the multiple reflections. However, in traditional 3D porous structures, multiple reflections only occur within the pores. Promoting multiple reflections beyond the pores should further improve the absorbing performance. Herein, a 3D porous composite foam with sandwiched cell walls was developed to boost multiple reflections in both the submillimeter-scale pores and the submicron-scale cell walls, achieving multiscale microwave absorption. Polydopamine (PDA)-modified polyimide foam (PIF) was used as the 3D porous skeleton. The cell walls of the PDA@PIF were sandwiched by Ti 3 C 2 T x MXene. The resulting Ti 3 C 2 T x @PDA@PIF can absorb over 90% of the incident microwave over the whole X band, which is contributed by multiscale multiple reflections, conduction loss, and interfacial polarization. Meanwhile, the composite foam exhibits excellent flexibility and a low density of ∼30 mg cm −3 . This work offers a realistic approach for lightweight, flexible, and broadband microwave absorbers, enriching the structures for effective electromagnetic protection.
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JOURNAL OF NANOBIOTECHNOLOGY
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2023
·Vol. 21
·期 1
·1-21
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IF 10.2
Li Duo,Ren Ting,Ge Yunxuan,Wang Xiaoli,Sun Guohui,Zhang Na,Zhao Lijiao,Zhong Rugang
Carmustine (BCNU), a vital type of chloroethylnitrosourea (CENU), inhibits tumor cells growth by inducing DNA damage at O 6 position of guanine and eventually forming dG-dC interstrand cross-links (ICLs). However, the clinical application of BCNU is hindered to some extent by the absence of tumor selectivity, poor stability and O 6 -alkylguanine-DNA alkyltransferase (AGT) mediated drug resistance. In recent years, tumor microenvironment has been widely utilized for advanced drug delivery. In the light of the features of tumor microenvironment, we constructed a multifunctional hypoxia/esterase-degradable nanomicelle with AGT inhibitory activity named HACB NPs for tumor-targeting BCNU delivery and tumor sensitization. HACB NPs was self-assembled from hyaluronic acid azobenzene AGT inhibitor conjugates, in which O 6 -BG analog acted as an AGT inhibitor, azobenzene acted as a hypoxia-responsive linker and carboxylate ester bond acted as both an esterase-sensitive switch and a connector with hyaluronic acid (HA). The obtained HACB NPs possessed good stability, favorable biosafety and hypoxia/esterase-responsive drug-releasing ability. BCNU-loaded HACB/BCNU NPs exhibited superior cytotoxicity and apoptosis-inducing ability toward the human uterine cervix carcinoma HeLa cells compared with traditional combined medication of BCNU plus O 6 -BG. In vivo studies further demonstrated that after a selective accumulation in the tumor site, the micelles could respond to hypoxic tumor tissue for rapid drug release to an effective therapeutic dosage. Thus, this multifunctional stimulus-responsive nanocarrier could be a new promising strategy to enhance the anticancer efficacy and reduce the side effects of BCNU and other CENUs.
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PubMed
高影响因子
Drug Delivery and Translational Research
·
2023
·
IF 5.4
Nan Longyi,Song Haoyuan,Wang Haijun,Mi Ru,Wang Xiaoxu,Fang Liang
The aim of this study was to design a tulobuterol (TUL) patch with good penetration behavior and mechanical properties. Particular attention was paid to the effect of transdermal permeation enhancers on the release process of metal ligand-based acrylic pressure-sensitive adhesive (AA-NAT/Fe 3+ ). The type and dosage of the enhancers were screened by in vitro transdermal penetration in rat skin. The optimized formulation was evaluated in a pharmacokinetic study in rats. Furthermore, the molecular mechanism by which Azone (AZ) improves the release rate of TUL from AA-NAT/Fe 3+ was investigated by FT-IR, shear strength test, rheological study, and molecular simulation. As a result, the optimized formula using AA-NAT/Fe 3+ showed better mechanical properties compared to commercial products. Meanwhile, the AUC 0-t and C max of the optimized patch were 1045 ± 89 ng/mL·h and 106.8 ± 28.5 ng/mL, respectively, which were not significantly different from those of the commercial product. In addition, AZ increased the mobility of the pressure-sensitive adhesive (PSA) rather than decreasing the drug-PSA interaction, which was the main factor in enhancing TUL release from the patch. In conclusion, a TUL transdermal drug delivery patch was successfully developed using metal-coordinated PSA, and a reference was provided for the design of metal-coordinated acrylic PSA for transdermal patch delivery applications. Graphical Abstract
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JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
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2023
·
IF 3.1
Yu Hongrui,Huang Xueying,Zhou Liping,Wang Yi
Active packaging with antimicrobial functions to improve the quality and extend the shelf life of food products has gained great interest. Because commercial plastic packaging materials are not biodegradable and cause great environmental problems, plant-derived natural materials have been widely studied for the application of biodegradable packaging materials. Herein, we reported a study of essential oils (EOs)-loaded zein film. Cinnamaldehyde (CIN), carvacrol, and eugenol were added to equip the films with antimicrobial effects, while polyethylene glycol (PEG) and oleic acid (OA) were selected for the improvements of mechanical properties. The results showed that PEG efficiently improves the tensile strength and elongation (%E) of zein films compared to OA, although PEG induced weaker water barrier properties of the films than OA. FTIR spectra confirmed the formation of the hydrogen bonds between zein and PEG/OA. The EO-embedded zein film showed better antimicrobial effects than EO themselves. CIN-embedded films showed the highest antimicrobial effect among the three EOs. The sizes of the inhibition zones against Staphylococcus aureus of PEG-added zein films with 1%, 3%, and 5% CIN were 5.67, 12.67, and 16.67 mm, which were larger than that of pure CIN, with the sizes of 0.00, 3.00, and 4.67 mm, respectively. The developed films demonstrate a gradual release of EOs and show antimicrobial effects up to 96 h, indicating their high potential for the applications as active food packaging.
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MOLECULAR IMAGING AND BIOLOGY
·
2023
·Vol. 25
·期 6
·1125-1134
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IF 3.1
Yang Liping,Yin Liping,Hu Mei,Zhao Weiling,Wang Changjiang,Chen Yue,Li Zibo,Wang Li
Purpose Heart failure (HF) remains a major cause of late morbidity and mortality after myocardial infarction (MI). To date, no clinically established 18 F-labeled sympathetic nerve PET tracers for monitoring myocardial infarction are available. Therefore, in this study, we synthesized a series of 18 F-labeled benzyl guanidine analogs and evaluated their efficacy as cardiac neuronal norepinephrine transporter (NET) tracers for myocardial imaging. We also investigated the preliminary diagnostic capabilities of these tracers in myocardial infarction animal models, as well as the structure-activity relationship of these tracers. Procedures Three benzyl guanidine-NET tracers, including [ 18 F] 1 , [ 18 F] 2, and [ 18 F] 3 , were synthesized and evaluated in vivo as PET tracers in a myocardial infarction mouse model. [ 18 F]LMI1195 was used as a positive control for the tracers. H&E staining of the isolated myocardial infarction heart tissue sections was performed to verify the efficacy of the selected PET tracer. Results Our data show that [ 18 F] 3 had a moderate decay corrected labeling yield (~10%) and high radiochemical purity (>95%) compared to other tracers. The uptake of [ 18 F] 3 in normal mouse hearts was 1.7±0.1%ID/cc at 1 h post-injection (p. i.), while it was 2.4±0.1, 2.6±0.9, and 2.1±0.4%ID/cc in the MI mouse hearts at 1, 2, and 3 days after surgery, respectively. Compared with [ 18 F]LMI1195, [ 18 F] 3 had a better myocardial imaging effect in terms of the contrast between normal and MI hearts. The area of myocardial infarction shown by PET imaging corresponded well with the infarcted tissue demonstrated by H&E staining. Conclusions With an obvious cardiac uptake contrast between normal mice and the myocardial infarction mouse model, [ 18 F] 3 appears to be a potential tool in the diagnosis of myocardial infarction. Therefore, it is necessary to conduct further structural modification studies on the chemical structure of [ 18 F] 3 to improve its in vivo stability and diagnostic detection ability to achieve reliable and practical imaging effects.
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Journal of Food Measurement and Characterization
·
2023
·Vol. 17
·期 6
·5972-5979
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IF 3.4
Zhao Shujun,Liu Wei,Song Dapeng
The detection of the herbicide propachlor in environmental and food samples is critical due to its potential toxic effects. In this study, a sensitive and selective electrochemical sensor based on a molecularly imprinted polymer (MIP), polyethyleneimine-treated multi-walled carbon nanotubes (PEI-MWCNTs), and gold nanoparticles (AuNPs) was developed for propachlor detection. The PEI-MWCNTs enhanced the conductivity of the sensor, while AuNPs promoted electron transfer during the detection process, resulting in a lower detection limit (78 nM) and a wider linear range (0.5 µM to 70 µM) compared to traditional sensors. Furthermore, the sensor exhibited high selectivity against other herbicides, with interference suppression percentages above 92% for common contaminants. The performance of the sensor was further improved by integrating an XGBoost machine learning algorithm for data analysis, which improved the predictive accuracy of propachlor concentration. Reproducibility tests on three independently prepared sensors showed a relative standard deviation (RSD) below 5%. This innovative approach presents a significant advancement in the field of propachlor detection, providing an effective tool for environmental monitoring and food safety.
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