INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Xiang-dong Bai,Wei Wang,Jia-bao Ji,Jing Jiang,Qi-bin Yu,Chuan-ping Yang,Gui-feng Liu
The CBL-Interacting Protein Kinases (CIPK) is an important protein in stress responses. However, the research of CIPK function is limited in poplar. The research objective is to improve the salt tolerance of poplar using CIPK. In the present study, a CIPK24 gene from Populus alba × P. Berolinensis ( PabCIPK24 ) was cloned, which possesses a kinase domain and a regulatory domain and shows the closest homology to CIPK24 of Populus alba ( PaCIPK24 ). Seven PabCIPK24 overexpression transgenic lines were obtained through Agrobacterium-mediated transformation. Under salt stress treatment, transgenic lines accumulated less sodium ions and more potassium ion accumulation than wild type (WT) and had lower degree of cell damage. The transgenic line shows significant differences compared to the WT in terms of root length (The transgenic line is 0.83 cm taller than the WT.), dry weight (The transgenic lines weighs 0.07 g more than the WT), and seedling height (The transgenic line is 1.52 cm taller than the WT) during the tissue culture seedling stage. Additionally, transgenic lines have strong reactive oxygen species (ROS) scavenging ability and increases the gene expression of salt tolerant related genes. The study indicates that PabCIPK24 positively regulates salt stress, and obtained salt tolerant transgenic poplar.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenxiu Gan,Ziyang Zheng,Jiawei Yan,Xi He,Zanyong Zhuang,Fei-Fei Chen,Yan Yu
Flexible metal–organic framework (MOF) films are greatly desired for the separation of hazardous molecules and ions from wastewater. The current MOF films are usually horizontally deposited on the substrates, and thus restricted by brittleness, low exposure of surface area, as well as poor separation functions. Here, an organic–inorganic mixed substrate is firstly fabricated by growing hydroxyapatite (HA) nanowire arrays on the cellulose fiber (CF). Subsequently, MIL-100(Fe) nanocrystals are assembled on the surfaces of HA nanowire arrays through a layer-by-layer manner, leading to a unique vertical MOF film. The resulting vertical MOF films show competitive advantages over the horizontal counterparts: (i) they show excellent flexibility and they are tolerant to serious physical damage; (ii) they have multiple separation functions including ion exchange of HA, excellent adsorption of MOFs, and strong electrostatic interaction of CF; and (iii) the agglomeration of MIL-100(Fe) nanocrystals is effectively suppressed. Therefore, the average roughness, specific surface area, and average pore size of films are optimized. As a result, the vertical MOF films show universal separation of positively/negatively-charged dyes and Pb 2+ ion, with high removal rates of > 94 %. More appealing, the mixed pollutants in the complex wastewater can be one-step separated through the vertical MOF films, with high removal rates of > 96 %.
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Green Energy & Environment
·
2021
·
IF 8.207
Liteng Li,Xiaofang Li,Susu Zhang,Hongyuan Yan,Xiaoqiang Qiao,Hongyan He,Tao Zhu,Baokun Tang
Acrylic acid (AA) is an important and widely used industrial chemical, but its high toxicity renders its use incompatible with the concept of green development. By leveraging its terminal carboxyl group and unsaturated bond, we designed and explored a new strategy to increase the greenness of AA via its eutectic melting using a quaternary ammonium salt (choline chloride) to form a deep eutectic solvent (DES), followed by polymerisation of the DES to form a polymer (poly(DES)). The greenness of AA, DES, and poly(DES) was evaluated via an in vitro test using MGC80-3 cells and an in vivo test using Kunming mice. The toxicity improved from Grade 2 (moderately toxic) for AA to Grade 1 (slightly toxic) for DESs and Grade 0 (non-toxic) for poly(DES) in the in vitro test. Moreover, the poly(DES)s showed a lower toxicity in mice than the DESs in the in vivo test. Thus, greenness enhancement was successfully achieved, with the greenness following the order AA < DES < poly(DES). Furthermore, the mechanisms underlying the change in toxicity were explored through microscopy and flow cytometry, which revealed that the DES can permeate the MGC80-3 cell membrane during the G 0 /G 1 phase to adversely affect DNA synthesis in the S phase, but the poly(DES) cannot. Finally, the green poly(DES), which showed good adsorption properties and flexible functionality, was successfully applied as a carrier or excipient of drugs. Through the novel strategy reported herein, greenness enhancement and the broadening of the application scope of a toxic organic acid were achieved, making such acids applicable for green development.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Songlin Zhao,Fushan Chen,Xiandi Zhu,Weijun Liu,Chenlin Wu,Jie Zhang,Shibin Ren,Zhengzhong Yan,Wenli Cao,Qunfeng Zhang,Xiaonian Li
In this study, a novel hierarchically porous N–doped carbon (HPNC) material was successfully prepared by soft-templating method. The commercial triblock copolymer of Pluronic F127 and a polyazine derived from hydrazine hydrate & glyoxal were used as soft template and precursor, respectively. The obtained materials were fully characterized and tested as a sorbent for the removal of hydrophilic dyes of Methylene blue (MB), Basic Fuchsin (BF), Eosin Y (EY) and Rhodamine B (RB) from their aqueous effluents. According to the characterization results, the synthesized material of HPNC-1000 presented thick fibrous morphology with micron size in diameter, hierarchically porous structure with surface area of 1853 m 2 /g, pore volume of 1.59 cm 3 /g and nitrogen content of 4.5 wt%. Adsorption-desorption investigation reveals that synergistic effect of hydrophobic interaction and hydrogen-bonding formation of the dye molecules with the sorbent was most pronounced in the adsorptions. The maximum adsorption capacities for MB, BF, EY and RB reached 0.83, 0.92, 1.23 and 1.83 mmol g −1 , respectively. The adsorption processes well fitted by the pseudo first-order kinetic model and the Liu′s isotherm. The sorbent can be regenerated by above 90% of the initial adsorption efficiency after six regeneration cycles.
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高影响因子
Nanoscale Advances
·
2021
·Vol. 3
·期 11
·3199-3215
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IF 4.553
Lihong Tao,Jianjun Zhao,Jun Chen,Caixia Ou,Weixia Lv,Shengwen Zhong
For solving the problems of high solubility in electrolytes, poor conductivity and low active site utilization of organic electrode materials, in this work, 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) grafted nickel phthalocyanine (TNTCDA-NiPc) was synthesized and used as an anode material for lithium ion batteries. As a result, the dispersibility, conductivity and dissolution stability are improved, which is conducive to enhancing the performance of batteries. The initial discharge capacity of the TNTCDA-NiPc electrode is 859.8 mA h g−1 at 2 A g−1 current density, which is much higher than that of the NTCDA electrode (247.4 mA h g−1). After 379 cycles, the discharge capacity of the TNTCDA-NiPc electrode is 1162.9 mA h g−1, and the capacity retention rate is 135.3%, which is 7 times that of the NTCDA electrode. After NTCDA is grafted to the phthalocyanine macrocyclic system, the dissolution of the NTCDA in the electrolyte is reduced, and the conductivity and dispersion of the NTCDA and phthalocyanine ring are also improved, so that more active sites of super lithium intercalation from NTCDA and phthalocyanine rings are exposed, which results in better electrochemical performance. The strategy of grafting small molecular active compounds into macrocyclic conjugated systems used in this work can provide new ideas for the development of high performance organic electrode materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Rong Zhang,Jian-Feng Sun
Along with the development of versatile trichromatic phosphors, the phosphors bridging the cyan gap between blue and green light have been an ongoing focus in simulating the full-visible-spectrum luminescence to satisfy the daily illuminating demands. Herein, an intriguing cyan-emitting phosphor Rb 2 CaPO 4 F:Eu 2+ belonging to the perovskite-type structural prototype was first time synthesized via the solid-state reaction. Structural analysis indicated that the typical Rb 2 Ca 0.90 PO 4 F:0.10Eu 2+ phosphor crystallizes in the orthorhombic structure with the space group of Pnma (62), and its cell parameters are equal to a = 12.913(5) Å, b = 5.989(4) Å, c = 7.440(1) Å, and V = 575.44(8) Å 3 . The fluorine-centered [FRb 4 Ca 2 ] octahedra interconnect with each other by sharing faces to build the one-dimensional perovskite-structure corrugated chains, which further connect with the [PO 4 ] tetrahedra to establish the structural framework of Rb 2 CaPO 4 F host. The electronic structure of Rb 2 CaPO 4 F matrix was studied by the first-principle calculation on the basis of the density functional theory, revealing an appropriate direct band of 4.76 eV. Pumped with the near-ultraviolet light, Rb 2 CaPO 4 F:Eu 2+ phosphor displayed a bright cyan emission covering from 400 to 600 nm with a broad FWHM of 142 nm. According to the Dexter theory, the concentration quenching mechanism of Eu 2+ -activated Rb 2 CaPO 4 F phosphor was classified as the dipole-dipole interaction. The Rb 2 CaPO 4 F:Eu 2+ phosphor not only exhibits a good thermal stability (I 443 K /I 298 K = 70%), but possesses a satisfactory internal quantum efficiency of 68% which is superior to most of the previously reported cyan-emitting phosphors. Consequently, it turns out that our perovskite-type Rb 2 CaPO 4 F:Eu 2+ phosphor can be considered as a promising candidate to fill the cyan gap toward the full-visible-spectrum light. The present work also demonstrates a great possibility for exploring the novel phosphors inspired by the mineral-type structural prototypes.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2021
·Vol. 51
·期 5
·803-814
·
IF 2.8
Zhao Ting,Jiang Liang,Liu Jinwei,Wu Hanqiang,Qin Na,Qian Linmao
Potassium persulfate was used as an effective oxidizer for chemical mechanical polishing (CMP) of GCr15 steel. The effects of pH, potassium persulfate content and chelating agents on the CMP performance of GCr15 steel were investigated, and the surface films formed in the potassium persulfate-based slurries were characterized accordingly. It is revealed experimentally that, with pH increasing from 2.0 to 9.0, the material removal rate (MRR) is independent of pH while the surface roughness R a decreases. At pH 8.0, as the potassium persulfate content increases, the MRR linearly increases with a slope of 48 nm min −1 mM −1 , but the surface quality continues to deteriorate accompanied with the black Fe 3 O 4 residue due to the severe corrosion by persulfate. In particular, Fe 2+ and Fe 3+ ions are continuously produced by oxidation of persulfate, and a significant part of Fe 2+ and Fe 3+ further reacts with OH − to form a non-uniform and rough surface film which primarily consists of Fe 3 O 4 . After adding an appropriate chelating agent EDTA, the R a reaches 1.7 nm without any black residue due to the chelation reactions between iron ions and EDTA. The findings suggest that a nano-precision surface finish of bearing steel could be achieved at weakly alkaline pH with persulfate-based slurries. Graphic abstract
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JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 28
·期 3
·825-834
·
IF 2.496
Zhang Long,Ge Jianhua,Liu Yujie,Zheng Xuyang,Du Pingwu
Solar-driven reduction of dinitrogen to ammonia remains greatly challenging due to the stable triple bond between N atoms. In this study, g-C 3 N 4 photocatalysts were synthesized via ozone etching method. Due to the O 3 treatment, the resulting photocatalysts were rich in carbon vacancies. Etching g-C 3 N 4 with ozone for two hours (O 3 GCN-2), resulted in the decrease of size, and the structure becoming less compact. The specific surface area of O 3 GCN-2 increased up to ~ 12.751 m 2 ·g −1 , in comparison with that of the bulk g-C 3 N 4 (BGCN) that was only ~ 5.652 m 2 ·g −1 . The nitrogen fixation efficiency of O 3 GCN-2 was 2.72 times higher than that of BGCN under visible light irradiation. UV–vis, electrochemical impedance spectroscopy, and photocurrent measurements showed that O 3 GCN-2 had enhanced visible light absorption properties and enhanced electron–hole separation efficiency. The possible mechanism of the photocatalytic nitrogen fixation was also investigated. This study may provide a novel idea and insight for the design of efficient photocatalysts for nitrogen fixation.
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NANOTECHNOLOGY
·
2021
·Vol. 32
·期 26
·265603
·
IF 3.874
Jianwei Zheng,Liying Zhang,Yang Li,Hong-Bin Sun,Gang Zhang,Qi Sun
Core–shell nanocomposites with a catalytic metal-organic framework (MOF) shell are more effective and stable than bare MOF. We have successfully designed an effective heterogeneous catalyst for the synthesis of benzimidazole by integrating acidic catalytic activity, and promoted the aerobic oxidation and magnetic recyclability of core–shell nanocomposite Fe3O4@SiO2@UiO-66. The Fe3O4@SiO2 core is encapsulated by the in situ-grown UiO-66 shell, and the UiO-66 shell retains the porous structure and crystallinity of UiO-66 with abundant exposed Lewis acid sites. It shows high catalytic ability for the synthesis of various benzimidazoles through the acid-catalyzed condensation and aerobic oxidation with in situ oxygen. The Fe3O4@SiO2 core provides magnetic recyclability of Fe3O4@SiO2@UiO-66, and maintains high catalytic ability and stability over six cycles.
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ACS Nano
·
2021
·
IF 15.881
Yuefei Wang,Qing Li,Jiaxing Zhang,Wei Qi,Shengping You,Rongxin Su,Zhimin He
Chiral self-assembly of peptides has attracted great interest owing to their promising applications in biomedicine, chemistry, and materials science. However, compared with the rich knowledge about their chiral self-assembly at the molecular or nanoscale, the formation of long-range-ordered hierarchical helical arrays (HHAs) from simple peptides remains a formidable challenge. Herein, we report the self-templated assembly of an amyloid-like dipeptide into long-range-ordered HHAs by their spontaneous fibrillization and hierarchical helical assembly within a confined film. The chiral interactions between the peptide and diamines result in geometry frustration and the phase transition of self-assembling peptide films from achiral spherulite structures into chiral HHAs. By changing the chirality and enantioselective interactions, we can control the phase behavior, handedness, and chiroptics of the self-assembled HHAs precisely. Moreover, the redox activity of the HHAs allows the in situ decoration of nanoparticles with high catalytic activity. These results provide insights into the chiral self-assembly of peptides and the fabrication of highly ordered materials with complex architectures and promising applications in chiroptics and catalysis.
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Bioactive Materials
·
2021
·
IF 14.593
Bin Hu,Mingzhu Gao,Kofi Oti Boakye-Yiadom,William Ho,Wei Yu,Xiaoyang Xu,Xue-Qing Zhang
Prolonged, intense inflammation and excessive oxidative stress hinder diabetic wounds from healing normally, leading to disorders downstream including the postponement of re-epithelialization and extracellular matrix (ECM) formation. Herein, we report a hyaluronic acid (HA) and chitosan based hydrogel (OHA-CMC) with inherent antibacterial and hemostatic activities fabricated via Schiff base reaction. By encapsulating nanotechnologically-modified curcumin (CNP) and epidermal growth factor (EGF) into the hydrogel, OHA-CMC/CNP/EGF exhibited extraordinary antioxidant, anti-inflammatory, and migration-promoting effects in vitro. Meanwhile, OHA-CMC/CNP/EGF presented on-demand drug release in synchrony with the phases of the wound healing process. Specifically, curcumin was rapidly and constantly released to alleviate inflammation and oxidative stress in the early phase of wound healing, while a more gradual and sustained release of EGF supported late proliferation and ECM remodeling. In a diabetic full-thickness skin defect model, OHA-CMC/CNP/EGF dramatically improved wound healing with ideal re-epithelialization, granulation tissue formation, and skin appendage regeneration, highlighting the enormous therapeutic potential this biomaterial holds as a diabetic wound dressing.
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BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
M.R. Ali,M.S. Bacchu,M.A.A. Setu,S. Akter,M.N. Hasan,F.T. Chowdhury,M.M. Rahman,M.S. Ahommed,M.Z.H. Khan
Due to the epidemics of emerging microbial diseases worldwide, the accurate and rapid quantification of pathogenic bacteria is extremely critical. In this work, a highly sensitive DNA-based electrochemical biosensor has been developed to detect Vibrio cholerae using gold nanocube and 3-aminopropyltriethoxysilane (APTES) modified glassy carbon electrode (GCE) with DNA carrier matrix. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) experiments were performed to interrogate the proposed sensor at each stage of preparation. The biosensor has demonstrated high sensitivity with a wide linear response range to target DNA from 10 −8 to 10 −14 ( R 2 = 0.992 ) and 10 −14 to 10 −27 molL −1 ( R 2 = 0.993 ) with a limit of detection (LOD) value of 7.41 × 10 −30 molL −1 ( S/N = 5 ). The biosensor also exhibits a selective detection behavior in bacterial cultures that belong to the same and distant genera. Moreover, the proposed sensor can be used for six consecutive DNA assays with a repeatability relative standard deviations (RSD) value of 5% ( n = 5). Besides, the DNA biosensor shows excellent recovery for detecting V. cholerae in poultry feces, indicating that the designed biosensor could become a powerful tool for pathogenic microorganisms screening in clinical diagnostics, food safety, and environmental monitoring.
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