Carbon Letters
·
2022
·Vol. 33
·期 1
·163-175
·
IF 3.117
Liu Shouxiang,Chen Yu,Qiao Yang,Li Zhiqiang,Wei Yanyan
Cracks are an inevitable problem during the use of materials, and flexible sensors with self-healing capability are of great importance for applications in wearable devices and skin-like electronic devices. This paper prepared self-healing flexible strain sensors by compounding self-healing polyurethane with carbon nanotubes. First, by changing the ratio of disulfide bonds, a good balance between mechanical properties and self-healing efficiency was achieved in the prepared self-healing polyurethane. The most balanced sample reached 12.28 MPa in tensile strength, after 24 h of self-repair at 30 °C, the tensile strength was 7.75 MPa, and the self-repair efficiency was 63.11%; after 24 h of self-repair at 80 °C, the tensile strength was 11.64 MPa, and the self-repair efficiency reached 94.79%. Then the sensors prepared by compounding with carbon nanotubes showed a good electrochemical response, and both slow and fast repeated bending of the finger wearing the sensors yielded significantly different electrical signal changes, and the sensors were cut off and still had the same function after self-repair at 30 °C, demonstrating their excellent potential for applications in soft robots, wearable devices, etc.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 6
·1349-1355
·
IF 2.726
Xiao Meng,Qi Wenqian,Jia Shuanghui,Pang Mengting,Shi Fengcheng,Mao Hui
Significant concerns have been raised over the removal of antibiotics, such as tetracyclines(TC) in aquatic environments. Herein, we synthesized a new type of heterogeneous catalyst by supporting Fe 0 nanopartciles(FeNPs) onto carbon coated ZIF-8 (C@ZIF-8). The carbon layer formed by glucose was beneficial to maintain the morphology and porous structure of ZIF-8, which can also appropriately improve the hydrophobicity of ZIF-8 for enriching the TC. The as-prepared FeNPs-C@ZIF-8 catalyst featured an extreme large specific surface area(1122.16 m 2 /g), and the supported FeNPs with an average diameter of 6.13 nm exhibited a high dispersity on the supporting matrix of C@ZIF-8. For the removal of tetracycline, the large specific surface area of FeNPs-C@ZIF-8 allowed for an easy access of tetracycline to the FeNPs, while the highly dispersed FeNPs served as actived sites for the efficient degradation of tetracycline. A synergistic effect between adsorption and catalytic degradation of FeNPs(5%, mass fraction)-C@ZIF-8 was proven to be responsible for the high-performance removal of tetracycline with the removal efficiency high up to 93.02% at pH 5, 25 °C. The FeNPs-C@ZIF-8 was capable of recycling after activation with supplementary Fe 0 , which still maintained a high removal efficiency of 75.52% in the 5th cycle within 20 min.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 11
·1-11
·
IF 6.408
Zhou Hang-Yu,Peng Li-Jing,Tian Tao,Zhang Wei-Yi,Chen Guo-Ying,Zhang Hao,Yang Feng-Qing
An effective, selective, and multicolor colorimetric assay for Cu 2+ detection based on the regulation of peroxidase-like nanozyme-mediated etching of gold nanorods (Au NRs) is proposed. Cu 2+ -creatinine complex is selected as the nanozyme that exhibits excellent peroxidase-like activity even in the case of low concentration of Cu 2+ , which can catalyze 3,3,5,5-tetramethylbenzidine (TMB) to produce oxidized TMB (TMB + ) in the presence of hydrogen peroxide, and TMB + is oxidized to generate TMB 2+ after adding H + , and the TMB 2+ can etch Au NRs. The determination of Cu 2+ is achieved based on the blue shift of the longitudinal localized surface plasmon resonance peak of Au NRs. Under the optimal conditions, the developed colorimetric assay exhibits high sensitivity for the detection of Cu 2+ (limit of detection is 0.034 μM) with a wide linear range of 0.05–4.0 μM ( R 2 = 0.987). The solution shows a rainbow-like color in response to the increase of Cu 2+ concentration, which can realize the semi-quantitative detection of Cu 2+ by naked eyes. In addition, the developed method exhibits excellent selectivity for Cu 2+ -detection. The established method was used for the determination of Cu 2+ in lake water, soil, and normal human serum with satisfactory recovery of spiked samples. Graphical abstract
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 7
·18364-18379
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IF 5.19
Zhang Xiao,Li Zhiyue,Zhang Taoyi,Chen Jing,Ji Wenxi,Wei Yun
A low-cost and environmental-friendly sodium alginate-melamine@zeolitic imidazolate framework-67 (SA-ME@ZIF-67) adsorbent was fabricated by chemical grafting and in situ growth for the removal of lead ions in wastewater. Firstly, melamine (ME) was grafted onto sodium alginate (SA) by amide reaction, and then SA-ME was dropped into a solution of calcium chloride to form hydrogel bead, and ZIF-67 was grown on the SA-ME hydrogel bead by the in situ growth method. The SA-ME@ZIF-67 adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The SA-ME@ZIF-67 adsorbent was used to effectively adsorb Pb(II) from aqueous solutions. The initial concentrations of lead ions, adsorbent dose, initial pH of lead ion solution, temperature, and adsorption time for the material were optimized. The adsorption isotherms and kinetics fitted to Langmuir isotherm model ( R 2 = 0.9281, 0.9420, and 0.9623 at the temperatures of 288.15 K, 298.15 K, and 308.15 K, respectively) and pseudo-second-order kinetic model ( R 2 = 0.9901) respectively. According to the Langmuir model at 308.15 K, the maximum adsorption capacity of the adsorbent for Pb(II) was 634.99 mg/g. The recycling application of the adsorbent was possible as it was easily collected and reused after five adsorption-regeneration cycles. In addition, the Pb(II) in real wastewater samples has been efficiently removed using the fabricated hydrogel. The results showed that the SA-ME@ZIF-67 adsorbent had high adsorption capacity, removal efficiency, and easy recyclability for Pb(II). Graphical abstract
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Liu Heming,Xie Ruikuan,Luo Yuting,Cui Zhicheng,Yu Qiangmin,Gao Zhiqiang,Zhang Zhiyuan,Yang Fengning,Kang Xin,Ge Shiyu,Li Shaohai,Gao Xuefeng,Chai Guoliang,Liu Le,Liu Bilu
Constructing stable electrodes which function over long timescales at large current density is essential for the industrial realization and implementation of water electrolysis. However, rapid gas bubble detachment at large current density usually results in peeling-off of electrocatalysts and performance degradation, especially for long term operations. Here we construct a mechanically-stable, all-metal, and highly active CuMo 6 S 8 /Cu electrode by in-situ reaction between MoS 2 and Cu. The Chevrel phase electrode exhibits strong binding at the electrocatalyst-support interface with weak adhesion at electrocatalyst-bubble interface, in addition to fast hydrogen evolution and charge transfer kinetics. These features facilitate the achievement of large current density of 2500 mA cm −2 at a small overpotential of 334 mV which operate stably at 2500 mA cm −2 for over 100 h. In-situ total internal reflection imaging at micrometer level and mechanical tests disclose the relationships of two interfacial forces and performance of electrocatalysts. This dual interfacial engineering strategy can be extended to construct stable and high-performance electrodes for other gas-involving reactions.
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高影响因子
Journal of Analysis and Testing
·
2022
·Vol. 7
·期 2
·163-171
·
IF 0
Qu Gang,Chen Bo,Liu Shilei,Zhang Qiaoli,Yang Yang,Fu Qingshan
Organophosphate nerve agents (OPNAs) are lethal chemical weapons (CWs) which hydrolyze rapidly to alkyl phosphate compounds in the environment. The identification of alkyl phosphate compounds in the environment is critical for the verification of OPNAs. Currently, due to the complex sample preparation and long detection process for organophosphate nerve agent hydrolysis products (OPNAHPs), their high-throughput determination is difficult. To simplify sample preparation and detection of OPNAHPs from environmental samples, a quick, easy, cheap, effective, rugged and safe (QuEChERS) method for the simultaneous purification of the five OPNAHPs in environmental samples combined with detection through direct analysis in real-time ionization source coupled with tandem mass spectrometer (DART-MS/MS) was developed. An internal standard method was applied for the quantification. The method exhibited a good linearity ( R 2 > 0.991) in the range of 1.00 ng/mL-4.00 μg/mL. The limits of detection and limits of quantification were 1.00–7.00 ng/mL and 10.0–20.0 ng/mL, respectively. The recoveries of OPNAHPs in environmental samples were between 65.3% and 107%, with relative standard deviations ranged from 1.6% to 19%. In addition, the sample preparation and analysis process for OPNAHPs could be completed in less than 10 min. The results demonstrated that the modified QuEChERS method could quickly and efficiently remove the matrix of environmental samples. Combined with DART-MS/MS, an accurate and high-throughput detection method of OPNAHPs in environmental samples was provided. The developed method has great potential in the fields of early warning, clinical treatment and environmental decontamination.
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NATURE
·
2022
·Vol. 610
·期 7930
·74-80
·
IF 69.504
Zhang Yunmao,Han Yuhang,Ji Xiaoliang,Zang Duyang,Qiao Long,Sheng Zhizhi,Wang Chunyan,Wang Shuli,Wang Miao,Hou Yaqi,Chen Xinyu,Hou Xu
The adverse impact of particulate air pollution on human health 1 , 2 has prompted the development of purification systems that filter particulates out of air 3 , 4 , 5 . To maintain performance, the filter units must inevitably be replaced at some point, which requires maintenance, involves costs and generates solid waste 6 , 7 . Here we show that an ion-doped conjugated polymer-coated matrix infiltrated with a selected functional liquid enables efficient, continuous and maintenance-free air purification. As the air to be purified moves through the system in the form of bubbles, the functional fluid provides interfaces for filtration and for removal of particulate matter and pollutant molecules from air. Theoretical modelling and experimental results demonstrate that the system exhibits high efficiency and robustness: its one-time air purification efficiency can reach 99.6%, and its dust-holding capacity can reach 950 g m −2 . The system is durable and resistant to fouling and corrosion, and the liquid acting as filter can be reused and adjusted to also enable removal of bacteria or odours. We anticipate that our purification approach will be useful for the development of specialist air purifiers that might prove useful in a settings such as hospitals, factories and mines.
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高影响因子
Food and Bioprocess Technology
·
2022
·Vol. 15
·期 12
·2683-2696
·
IF 5.581
Liu Jingbo,Cheng Dongkun,Zhang Deju,Han Lu,Gan Yiming,Zhang Ting,Yu Yiding
This study aimed to develop and characterize the chitosan-edible coating solution (CS-NH-TC) incorporated with ε-polylysine hydrochloride, tea polyphenols, nisin, and ascorbic acid and then investigate their effect on physicochemical, antibacterial, and sensory properties of marinated eggs stored at 4 °C for 24 days; marinated eggs without coating were set as control. The CS-NH-TC edible coating solution exhibited the lowest particle size (582.6 ± 16.6 nm) and polydispersity index (0.49) and highest zeta potential (30.96) among the coatings. The FT-IR spectra showed that TP, VC, nisin, and ε-PLH were successfully encapsulated in the CS edible coating solution. The moisture content and water-holding capacity of the marinated eggs coated with CS-NH-TC remained stable up to 20 days. Marinated eggs coated with CS-NH-TC edible coating solution exhibited lower total viable counts of microorganisms and more stable color and pH values compared to the control during the entire storage time. Furthermore, the texture and sensory evaluation results demonstrated that marinated eggs coated with CS-NH-TC edible coating solution had low degradation rate and improved overall acceptability scores. This study confirmed that CS-NH-TC edible coating solution was a promising coating for improving the quality and shelf life of marinated egg products and may have a broad application prospect in the preservation of other food products.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-19
·
IF 9.429
Jia Tao,Li Dan,Du Jiarui,Fang Xikui,Gerasimov Valeriy,Ågren Hans,Chen Guanying
Nanozymes are promising for precise cancer treatment, but are typically limited in terms of the low catalytic efficiency and the complexity in tumor microenvironment (TME). Herein, we describe a bimodal type of AgPd plasmonic blackbody (AgPd PB) nanozyme of compact sizes (< 30 nm), which presents not only boosted enzyme efficacy but also efficient photothermal therapy (PTT) for synergized therapy through tissue-penetrating light in the second biological window (1000–1700 nm). The synthesized hyperbranched AgPd PB nanozymes possess intense and broadband localized surface plasmonic resonance absorption of 400–1300 nm, entailing prominent photothermal efficiency (η = 45.1% at 1064 nm) for PTT. Importantly, PTT was found to significantly boost the nanozyme efficacy of both catalase (CAT) and peroxidase (POD) processes, which correspondingly decompose H2O2 to into O2 to relieve tumor hypoxia, and activate H2O2 to generate oxidative •OH radical. While the generated •OH was found to be able to minimize heat shock proteins (HSPs), which plays a vital role to counterbalance PTT effect both in vitro and in vivo. As compared to control ground without treatment, the synergized nanozyme and PTT activities resulted in about 7-fold reduction of tumor volume, thus elevating the survival rate from 0 to 80% at 30 days posttreatment. Besides the synergistic therapy, the AgPd PB nanozyme were shown to own fluorescence, computed tomography (CT), and photoacoustic (PA) imaging abilities, thus having implications for uses in imaging-guided precise cancer therapy. This study provides a paradigm of TME responsive theranostics under NIR-II light irradiation.Graphical Abstract
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POLYMER BULLETIN
·
2022
·Vol. 80
·期 9
·10457-10471
·
IF 2.843
Wei Junji,Duan Yajun,Wang Hao,Hui Jizhuang,Qi Jiamin
Nowadays, the rapid development of industrial technology is putting a great demand for high-performance epoxy resin. Traditional bisphenol A epoxy resin (DGEBA) is facing great challenges from both the perspective of human health and the needs of cost reduction under the background of oil resources shortage. Therefore, it’s important to find appropriate substitutes for DGEBA. In this paper, a trifunctional epoxy resin (DPA-E) was prepared using a simple two-step method with diphenolic acid and epichlorohydrin. It was interesting that the DPA-E, cured by 3,3′-dimethyl-4,4′-diaminodicyclohexylmethane (DMDC), showed the similar properties as DGEBA except for curing temperature, glass transition temperature, and thermal expansion properties. The gel temperature for DPA-E/DMDC was as low as 29 ℃, which was obtained from curing kinetic study. Even for curing temperature of DPA-E/DMDC was also relatively low ( T p = 83 ℃). Even so, the glass transition temperature of this system was as high as 239 ℃, which was 24% higher than that of DGEBA/DMDC ( T g = 193 ℃). Furthermore, DPA-E/DMDC showed a lower thermal expansion coefficient, especially at elevated temperature (> 150 ℃). Therefore, this kind of new epoxy resin might have a very hopeful future in many important areas including aerospace and microelectronics.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-14
·
IF 17.694
Zhou Liang,Lei Qi,Guo Jimin,Gao Yuanyuan,Shi Jianjun,Yu Hong,Yin Wenxiang,Cao Jiangfan,Xiao Botao,Andreo Jacopo,Ettlinger Romy,Jeffrey Brinker C.,Wuttke Stefan,Zhu Wei
Deoxyribonucleic acid (DNA) is the blueprint of life, and cost-effective methods for its long-term storage could have many potential benefits to society. Here we present the method of in situ cryosilicification of whole blood cells, which allows long-term preservation of DNA. Importantly, our straightforward approach is inexpensive, reliable, and yields cryosilicified samples that fulfill the essential criteria for safe, long-term DNA preservation, namely robustness against external stressors, such as radical oxygen species or ultraviolet radiation, and long-term stability in humid conditions at elevated temperatures. Our approach could enable the room temperature storage of genomic information in book-size format for more than one thousand years (thermally equivalent), costing only 0.5 $/person. Additionally, our demonstration of 3D-printed DNA banking artefacts, could potentially allow ‘artificial fossilization’.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2022
·Vol. 32
·期 5
·2237-2248
·
IF 2.036
Liu Cansen,Zhen Haowen,Huang Qishan,Chen Wanlin,Mai Yongjin,Zhang Liuyan,Jie Xiaohua
The dispersity of incorporated particles is critical for the creation of composite coatings with enhanced performance. Here, we propose a mechanical agitation and ultrasound-assisted pulse electroplating technique for producing exfoliated MoS 2 reinforced cobalt-based composite coatings with improved tribological and electrochemical properties. The dispersity of exfoliated MoS 2 and its corresponding effect on the microstructure, microhardness, tribological and electrochemical behaviors of the resultant composite coatings are systematically investigated. The results reveal that the outstanding dispersity of exfoliated MoS 2 in electrolyte is beneficial to its even distribution and incorporation in the composite coating, endowing the resultant composite coatings with a smooth surface, compact structure, high hardness, remarkable antiwear and friction reduction performance as well as superior corrosion resistance. This study offers a strategy for producing high-performance composite coatings with promising practical applications. Graphical Abstract
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危险品化学品经营许可证（带存储）