Science China-Materials
·
2022
·Vol. 65
·期 6
·1463-1475
·
IF 8.64
Zheng Xiao,Wang Zhilong,Li Jinjin,Wei Liangming
The rechargeable aluminum-sulfur (Al-S) battery is a promising alternative-energy storage device with high energy density and made of cheap raw materials. However, Al-S batteries face several obstacles, especially the shuttle effect. Herein, a binder-free S@Ti 3 C 2 T x sandwich structure film with uniform sulfur dispersion was designed. The two-dimensional (2D) layered material Ti 3 C 2 T x not only has the function of binder and conductive agent but also is a promising host for sulfur anchoring. As a result, S@Ti 3 C 2 T x film showed an initial capacity of 489 mA h g −1 at 300 mA g −1 and retained the value at 415 mA h g −1 after 280 stable cycles, with an average Coulombic efficiency of ∼95%. The film displayed higher capacity and stability than the S + Ti 3 C 2 T x cathode prepared by the slurry-coating method (the initial capacity was 317 mA h g −1 and then decayed to 222 mA h g −1 after 160 cycles). The main capacity of S@Ti 3 C 2 T x film in the Al-S battery came from the reversible redox reaction of S 2− and S. This new 2D material combined with a controllable electrode structure design paves the way for the development of Al-S batteries.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Zhou Jun,Gao Zhe,Xiang Guolei,Zhai Tianyu,Liu Zikai,Zhao Weixin,Liang Xin,Wang Leyu
Supports can widely affect or even dominate the catalytic activity, selectivity, and stability of metal nanoparticles through various metal-support interactions (MSIs). However, underlying principles have not been fully understood yet, because MSIs are influenced by the composition, size, and facet of both metals and supports. Using Ru/TiO 2 supported on rutile and anatase as model catalysts, we demonstrate that metal-support interfacial compatibility can critically control MSI modes and catalytic performances in CO 2 hydrogenation. Annealing Ru/rutile-TiO 2 in air can enhance CO 2 conversion to methane resulting from enhanced interfacial coupling driven by matched lattices of RuO x with rutile-TiO 2 ; annealing Ru/anatase-TiO 2 in air decreases CO 2 conversion and converts the product into CO owing to strong metal-support interaction (SMSI). Although rutile and anatase share the same chemical composition, we show that interfacial compatibility can basically modify metal-support coupling strength, catalyst morphology, surface atomic configuration, MSI mode, and catalytic performances of Ru/TiO 2 in heterogeneous catalysis.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 2
·921-936
·
IF 1.754
Xia Xue,Dong Faqin,Nie Xiaoqin,Pan Ning,Liu Chang,Ding Congcong,Wang Junling,Cheng Wencai,He Huichao,Sun Shiyong,Zhang Yujing
A kind of amino groups modified polyacrylonitrile fibers (PAN-A) was prepared to extract uranium from organic-containing low-level radioactive wastewater (OC-LLRW). SEM/EDS and FTIR characterization conformed that amino group was triumphant grafed on polyacrylonitrile fibers (PAN) surface. Its adsorption capacity was 492.1 mg g −1 (pH 6.0) and can endure at least five adsorption/desorption cycles under condition of 0.1 mol L −1 HCl solution. This PAN-A can work efficiently in the organic containing waste water (urea, tetrahydrofurfuryl alcohol), while the polyvinylalcohol (PVA) exhibited an apparently suppressive effect. This phenomenon was mainly with respect to the sticky nature of PVA. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 4
·3057-3066
·
IF 4.682
Sun Shihao,Xia Qian,Feng Dong,Ru Hongqiang
SiC colloidal inks for the novel robocasting forming method were prepared using a two-step method, namely creating well-dispersed suspensions followed by inducing gelation via changing the pH values towards isoelectric points (IEPs). The effect of the adsorption behaviour of Polyethylene imine (PEI) on the rheological properties was systematically investigated for the both steps. Coincidentally, as SiC particles were saturated adsorbed with PEI, their respective rheological properties exhibited the optimum. For the first step, the strongest electrostatic repulsion was exhibited between SiC particles, and the corresponding suspension displayed the optimum dispersibility with a low shear viscosity ( η 0 ) of 27.86 Pa. For the second step, the colloidal gel presented the strongest elastic properties with an equilibrium storage modulus ( G ′) of 13,381.87 Pa and shear yield stress ( τ y ) of 355.89 Pa. The colloidal gel ink with solid loading as high as 51 vol.% behaved in a yield-pseudoplastic manner and was successfully utilized to fabricate 3-D periodic lattice structures.
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CELLULOSE
·
2022
·Vol. 29
·期 3
·1955-1967
·
IF 6.123
Gao Fei,Zeng Dong,Liu Hong,Qin Rui,Zhang Jie,Chen Yingming,Wang Weiming,Peng Chuang,Li Ming,Li Qing,Wang Hong,Peng Shuai
Abstract Deacetylated porous cellulose acetate microspheres (DPCA) modified with hydroxyapatite (HA) penetrated polydopamine (PDA) coating was prepared by a one-step in-situ method and investigated as the scaffold for bone tissue regeneration. The physical and chemical properties of different scaffolds were analyzed by Scanning electron microscopy, Transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and X-ray photoelectron spectrum. Test results proved the unique three-dimensional porous structure, homogeneous PDA coating, dispersive HA crystals of the DPCA-PDA-HA microspheres (DPPH). The excellent attachment, adhesion and proliferation of MC3T3-E1 preosteoblast on DPPH were manifested by cell adhesion and biocompatibility assessment. In vitro mineralization also shown MC3T3-E1 was capable of differentiating osteogenically. Such satisfactory biomedical performance of DPPH was ascribed to the one-step introducing process contributing to a uniform and enrich growth of HA on the microspheres surface and interior. This study provides a promising cellulose-based scaffold applied in bone regeneration field. Graphical abstract
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APPLIED PHYSICS B-LASERS AND OPTICS
·
2022
·Vol. 128
·期 3
·1-9
·
IF 2.171
Zhao Feng,Chu Yunting,Zhao Qianyun,Zhang Weiwei,Sun Jingchang,Li Chengren
A series of CaSrSiO 4 : Yb 3+ , Er 3+ , x Ag phosphors have been prepared by high-temperature solid-state reaction method. Scanning electron microscope (SEM) images show that more small spherical particles gather together to form bigger cluster when Ag nanoparticles are co-doped into CaSrSiO 4 : 9Yb 3+ , 1Er 3+ nanophosphor. Photoluminescence intensities of samples co-doped Ag nanoparticles enhance significantly and the optimized Ag concentration is 0.6 mol%. The fluorescence intensity ratio, the absolute sensitivity, relative sensitivity and temperature resolution are measured, computed and discussed in the range of 303–703 K. The results show that all sensing performances of CaSrSiO 4 : Yb 3+ , Er 3+ , 0.6Ag phosphor are superior to these of the sample un-doped Ag particles and the maximum S A value can go up to 7.3 × 10 –3 K −1 , indicating that CaSrSiO 4 : 9Yb 3+ , 1Er 3+ , 0.6Ag designed and prepared in this work is a promising optical high-temperature sensing material and it is appropriate to practical application in comprehensive fields.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-13
·
IF 9.429
Tong Ting,Deng Shuangfei,Zhang Xiaotong,Fang Liurong,Liang Jiangong,Xiao Shaobo
Background The infection and spread of porcine reproductive and respiratory syndrome virus (PRRSV) pose a serious threat to the global pig industry, and inhibiting the viral infection process is a promising treatment strategy. Nanomaterials can interact with viruses and have attracted much attention due to their large specific surface area and unique physicochemical properties. Ferrous sulfide nanoparticles (FeS NPs) with the characteristics of high reactivity, large specific surface area, and low cost are widely applied to environmental remediation, catalysis, energy storage and medicine. However, there is no report on the application of FeS NPs in the antiviral field. In this study, gelatin stabilized FeS nanoparticles (Gel-FeS NPs) were large-scale synthesized rapidly by the one-pot method of co-precipitation of Fe 2+ and S 2‒ . Results The prepared Gel-FeS NPs exhibited good stability and dispersibility with an average diameter of 47.3 nm. Additionally, they were characterized with good biocompatibility and high antiviral activity against PRRSV proliferation in the stages of adsorption, invasion, and replication. Conclusions We reported for the first time the virucidal and antiviral activity of Gel-FeS NPs. The synthesized Gel-FeS NPs exhibited good dispersibility and biocompatibility as well as effective inhibition on PRRSV proliferation. Moreover, the Fe 2+ released from degraded Gel-FeS NPs still displayed an antiviral effect, demonstrating the advantage of Gel-FeS NPs as an antiviral nanomaterial compared to other nanomaterials. This work highlighted the antiviral effect of Gel-FeS NPs and provided a new strategy for ferrous-based nanoparticles against PRRSV. Graphical Abstract
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JOURNAL OF FLUORESCENCE
·
2022
·Vol. 32
·期 3
·927-936
·
IF 2.525
Cui Hanyue,Lu Huan,Yang Jing,Fu Yao,Huang Yan,Li Li,Ding Yaping
In this paper, a fluorescent aptamer sensor was constructed based on the carbon dots (CDs) and graphene oxide (GO). This sensor combines the excellent fluorescence performance of CDs with the high specificity of aptamer, which can detect progesterone (P 4 ) with high sensitivity and selectivity. In the absence of P 4 , the CDs-aptamer system and GO form a fluorescence resonance energy transfer process (FRET), which quenches the fluorescence of the CDs. When P 4 is added, the aptamer specifically binds to it, resulting the fluorescence of the CDs is recovered. At optimal conditions, the fluorescence intensity recovered by the CDs has a linear relationship with the concentration of P 4 in the range of 0.1–120 nM and the detection limit is 3.3 × 10 –11 M. Besides, the sensor has satisfactory detection results of P 4 in milk, indicating that constructed method has enormous potential for application in food safety.
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CELLULOSE
·
2022
·Vol. 29
·期 4
·2525-2537
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IF 6.123
Liang Chunliu,Zang Limin,Shi Fangfang,Yang Chao,Qiu Jianhui,Liu Qifan,Chen Zhenming
Cotton fabric (CF) fabricated by natural cellulose fibers has porous structure, abundant hydrophilic hydroxyl groups and good mechanical flexibility, which is a promising substrate for flexible fabric-based supercapacitors. Graphene oxide (GO) nanosheets were fixed on the CF by vacuum filtration, and then the pyrrole monomers and silver ions (Ag + ) were adsorbed to the surface of GO/CF by π-π and electrostatic interactions, respectively. Polypyrrole/silver (PPy/Ag) nanoparticles were generated on the surface of GO/CF via in situ UV-induced polymerization, forming the flexible PPy/Ag/GO/CF electrodes. The electrodes combine three active materials (PPy, Ag and GO), which show good electrochemical performance. The electrode prepared under optimum conditions (UV irradiation time: 120 min; mass loading of GO on the CF: 3 mg cm −2 ) exhibits a high specific capacitance of 1664.0 mF cm −2 . The flexible symmetric quasi-solid-state fabric-based supercapacitor (QFSC) based on the optimum electrode also keeps superior electrochemical performance and excellent mechanical flexibility, which has a great application prospect for wearable energy storage devices.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 7
·4754-4770
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IF 4.682
Zhuang Yi,Kan Zhaojun,Jiang Yulin,He Miaomiao,Zhang Yuanyuan,Sun Xiaodong,Du Meixuan,Wang Jing,Li Yubao,Li Yunfeng,Zhang Li
In this study, we prepared a drug-laden graphene-incorporated calcium alginate (GCA) microspheres, which were then blended with the typically thermosensitive hydrogel named poly (d,l-lactide-co-glycolide)-poly (ethylene glycol)-poly (d,l-lactide-co-glycolide) triblock copolymer (PLGA-PEG-PLGA, PPP for short) to obtain an on-demand drug controlled release system triggered by near-infrared (NIR) laser, thus achieving minimally invasive treatment of tumorous defect through the in-situ curing of the GCA/PPP hydrogel after injection into the target site. The results indicate that all these drug-laden GCA/PPP hydrogels are injectable, enabling the minimally invasive treatment of defects with complex geometries and shapes. The 2%GCA/PPP could be heated up to 45.3 ºC within 3 min under NIR irradiation and showed a unique heating plateau in the heating curve, performing the desired photothermal stability and heating-up effect in comparison with the other groups. By turning on or off the NIR irradiation, GCA/PPP hydrogels could exhibit the step-shaped drug release curves, meaning that on-demand controlling the drug release is feasible by using NIR laser as the trigger. The in vitro biological assessments showed that the drug-laden GCA/PPP hydrogels were biocompatible as well as enhanced anti-tumor capability under NIR exposure, demonstrating their promise in treatment of tumorous defects with irregular shapes.
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CANCER GENE THERAPY
·
2022
·Vol. 29
·期 8
·1217-1227
·
IF 5.854
Wang Zhiwei,Li Mingxing,Liu Yuanfeng,Qiao Zhentao,Yang Ling,Liu Bo,Bai Tao
Autophagy is the predominant self-eating catabolic pathway activated in response to nutrient starvation and hypoxia within the microenvironment of varied malignancies, including hepatocellular carcinoma (HCC). SQSTM1/p62 links its cargos to autophagosomes for degradation, and reportedly acts as a contributor for hepatocarcinogenesis. Five GEO gene microarrays identified corticotropin releasing hormone (CRH) binding protein (CRHBP) as a significantly downregulated gene in HCC (log2 Fold change < −3 and p < 0.001), and an earlier human interactome study indicated that CRHBP may interact with p62. This study aimed to explore (1) the role of CRHBP in HCC development, and (2) whether p62-mediated autophagy was responsible for low CRHBP expression within HCC tissue. Following functional experiments first revealed an anti-proliferative, anti-metastatic, and anti-angiogenic role of CRHBP in HCC cells (Huh-7, Li-7 and HCCLM3) and xenografts. CRHBP negatively regulated cyclin B2 expression, and dissociated cyclin B2-CDK1 complex in HCC cells, thereby leading to cell cycle arrest at G2 phase. To simulate HCC microenvironment in vitro, Huh-7 cells were incubated in Earle’s Balanced Salt Solution (nutrient starvation) or exposed to 1% O 2 (hypoxic exposure). In addition to activating autophagy, nutrient starvation and hypoxic exposure also induced CRHBP degradation. Interestingly, CRHBP was demonstrated as a novel cargo targeted by p62 for degradation in autophagosomes. Blocking autophagy with 3-MA, chloroquine or siSQSTM1 prevented CRHBP degradation in HCC cells. Collectively, our study uncovers a role for CRHBP in retarding HCC development, reducing cyclin B2 expression and impairing cyclin B2-CDK1 interaction. CRHBP downregulation in HCC may attribute to p62-mediated autophagy.
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BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2022
·Vol. 45
·期 3
·563-571
·
IF 3.434
Mei Jianfeng,Wu Xia,Zheng Sujing,Yi Yu,Wang Xudong,Ying Guoqing
Bilirubin, a natural intermediate in heme degradation, is a valuable Chinese medicine used in more than 50 traditional Chinese medicine (TCM) preparations. At present, bilirubin is mainly produced by extraction from pig bile, but a shortage of the raw material has increased the price, to about US$10,000/kg in the Chinese market. Biliverdin, the precursor of bilirubin, is more abundant and less expensive than bilirubin, but it is not used in TCM. Thus, the biotransformation of biliverdin by biliverdin reductase (BvdR) may be a practical way to produce bilirubin. In this study, the codon-optimized gene of biliverdin reductase ( m bvdR ) from the cyanobacterium Synechocystis was cloned into Escherichia coli BL21(DE3), and the conditions for BL21-mBvdR expressing BvdR were optimized. Resting BL21-mBvdR cells were employed as biocatalysts to biotransform biliverdin to bilirubin. At a concentration of biliverdin substrate of 450 mg/L in the reaction mixture, the bilirubin content in dry cells reached 20.8 ± 0.8 mg/g, with a conversion yield of 72.3%. Therefore, recombinant E. coli expressing BvdR can be applied to biotransform biliverdin to bilirubin, providing a potential alternative process for bilirubin production. Graphical abstract
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危险品化学品经营许可证（带存储）