ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Kaidi Gao,Qiao Hu,Yu Xia,Guangming Han,Jianfeng Yao
NASICON-type Na 3 V 2 (PO 4 ) 3 (NVP) has been identified as an ideal cathode for sodium-ion batteries (SIBs) because of its ultra-fast Na + diffusion and very stable structure. However, it still suffers from significant problems such as a low operating voltage plateau (3.4 V, vs. Na + /Na), inferior electronic conductivity and unsatisfactory energy density (370 Wh kg −1 ), thereby hampering the commercialization of NVP. Herein, a series of Al 3+ /Ga 3+ co-doping Na 3 V 2 (PO 4 ) 3 cathodes were successfully prepared through a facile solid-state reaction process. The substitution of Al 3+ /Ga 3+ for V 3+ in Na 3 V 2–2x Al x Ga x (PO 4 ) 3 ( x = 0, 0.1 and 0.2) effectively activates the electrons outside of V and achieves an extra redox couple V 4+ /V 5+ for high-voltage (3.9 V, vs. Na + /Na) reactions. Moreover, the presence of Ga in this series of electrode materials increases the proportion of sp 2 -type carbon. The optimized Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 material possesses high ionic/electronic conductivity and superior electrochemical performance: the energy density is enhanced by approximately 13.1 % at 0.1 C (from 345.4 Wh kg −1 for NVP to 390.7 Wh kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ), and the power density is increased by approximately 135 % at 30 C (from 2574 W kg −1 for NVP to 6039 W kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ). Furthermore, Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 exhibits excellent cycling stability with 93.4 % capacity retention after 350 cycles at 1 C. Ex-situ XPS and electrochemistry investigations imply the high reversibility of the V 3+ /V 4+ /V 5+ redox reaction in Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 . This work proposes a novel strategy to modulate the electronic structure of NVP by co-doping with Al 3+ and Ga 3+ to achieve reversible multi-redox activity (V 3+ /V 4+ /V 5+ ) in NASICON-type NVP, thus providing a viable approach for advancing ultrafast high-energy sodium storage.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
NanoImpact
·
2022
·
IF 6.038
Amr S. Abou El-Ela,Eric Siaw Ntiri,Asim Munawar,Xiao-Xiao Shi,Chao Zhang,Joko Pilianto,Yadong Zhang,Ming Chen,Wenwu Zhou,Zeng-Rong Zhu
Background Nanoparticles have been employed as nanopesticides for pest control in agriculture. However, the harmful effects of their chemical synthesis on human and environmental health have resulted in increased use of green synthetic approaches, including the use of plant extracts. The brown planthopper, Nilaparvata lugens (Stål) (BPH), is a severe pest of rice plants ( Oryza sativa L.), especially in Asia. It is usually controlled chemically but has developed resistance against many insecticides. Results In this study, we synthesized metallic silver (Ag-NPs) and copper-oxide (CuO-NPs) nanoparticles using the exogenous phytohormone, gibberellic acid (GA 3 ), as a reducing agent. We then sprayed them separately on rice plants and BPH together and evaluated their effects on the plants and insects. SEM and TEM images showed that the synthesis was successful, indicated by the sizes (25–60 nm), uniform shape and spherical and cubical structures of Ag-NPs, as well as by the rugby sheet-like of CuO-NPs with lateral sizes of 150–340 nm and thickness of 30–70 nm. Independent applications of the nanoparticles and GA 3 on rice plants induced different volatile profiles, of which the highest number emitted was under Ag-NPs, including the highest emission of linalool. Transcriptome analysis showed that Ag-NPs-treated rice plants showed different transcriptome profiles compared to the control, 24 h after treatment, including the upregulation of the linalool synthase gene, genes of plants transcription factors such as WRKY, bHLH and NAC and other genes involved in plant defense responses. In all treatments, the mortality rate of BPH increased with an increase in NPs concentrations over time but was prominent under Ag-NPs treatment. The LC 50 values for Ag-NPs and CuO-NPs decreased with an increase in time. Also, the nanoparticles increased the activities of protective enzymes (POD, SOD and CAT), inhibited that of detoxification enzymes (A-CHE, ACP and AKP), and reduced total protein concentrations in the BPH. Conclusions These results show that synthesizing nanoparticles using phytohormones may be a safer and environmentally friendly option, which also holds promise for controlling the BPH in rice production.
研究领域:
农业科学
·
纳米技术
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植物病理学
·
昆虫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANNALS OF BOTANY
·
2024
·
IF 3.6
Guo Huanhuan,Li Shiqin,Liu Yong,Yang Qinsong
Background and AimsChinese pistachio (Pistacia chinensis Bunge), an important horticultural plant species, holds great ornamental value with beautiful leaves and fruits. Seedling propagation of this tree species is restricted by its erratic seed germination, however, the germination mechanism is ambiguous yet. The aim of this study was to figure out the germination mechanism from the novel perspective based on the multi-omics data.MethodsThe multi-omics technique combined with hormone content measurement was first applied in seed germination of Chinese pistachio.Key ResultsDue to the great accumulation during seed germination, catechin stood out from the identified metabolites by broadly targeted metabolomic analysis. Exogenous catechin of 10 mg/L significantly improved the germination of Chinese pistachio seeds. An interesting result of hormone analysis showed that the improving effect of catechin could be attributed to increase of the gibberellic acid 3 (GA3) content rather than decrease of the abscisic acid (ABA) content before germination. The paclobutrazol (PAC, a GA biosynthesis inhibitor) and PAC + catechin treatments also showed that the promoting effect of catechin on seed germination depends on GA biosynthesis. Transcriptome analysis and qRT‒PCR further revealed that catechin induced the expression of PcGA20ox5 to activate GA biosynthesis. Several transcription factors were induced by catechin and GA treatments, such as TCP, bZIP and C3H, which may play an important regulatory role in GA biosynthesis in a catechin-mediated way.ConclusionsCatechin promotes seed germination via GA biosynthesis in Chinese pistachios. This study proposes a novel mechanism by which catechin promotes seed germination via the GA pathway, which provides new insight into a comprehensive understanding of seed dormancy and germination.
研究领域:
植物学
·
植物生理学
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分子生物学
·
园艺学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Zhiming Hou,Xinyu Ren,Zhuangzhuang Sun,Ruoqi An,Mingzhi Huang,Cen Gao,Mengying Yin,Guangxiu Liu,Dengqi He,Hongliang Du,Rongbing Tang
Bacteria-derived hydrogen sulfide (H 2 S) often contributes to the emergence of antibiotic-recalcitrant bacteria, especially persister (a sub-population of dormant bacteria), thus causing the treatment failure of Catheter-associated urinary tract infection (CAUTI). Here, an H 2 S harvester nanosystem to prevent the generation of persister bacteria and disrupt the dense biofilm matrix by the self-adaptive ability of shape-morphing is prepared. The nanosystem possesses a core-shell structure that is composed of liquid metal nanoparticle (LM NP), AgNPs, and immobilized urease. The nanosystem decomposes urea contained in urine to generate ammonia for eliminating bacteria-derived H 2 S. Depending on the oxidative layer of liquid metal, the nanosystem also constitutes a long-lasting reservoir for temporarily storing bacteria-derived H 2 S, when urease transiently overloads or in the absence of urine in a catheter. Depriving H 2 S can prevent the emergence of persistent bacteria, enhancing the bacteria-killing efficiency of Ga 3+ and Ag + ions. Even when the biofilm has formed, the urine flow provides heat to trigger shape morphing of the LM NP, tearing the biofilm matrix. Collectively, this strategy can turn trash (urea) into treasure (H 2 S scavengers and biofilm rippers), and provides a new direction for the antibacterial materials application in the medical field.
研究领域:
纳米技术
·
生物医学工程
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材料科学
·
微生物学
·
传染病学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Zheng Hui,Huang Zhida,Chen Tongxin,Sun Yafeng,Chen Shouqing,Bu Guangming,Guan Hongcai
The continual resistance to antibiotics and the generation of a series of bacterial infections has emerged as a global concern, which requires appropriate measures and therapeutics to address such a menace. Herein, we report on Silk fibroin (SF) hydrogel with good biocompatibility and biodegradability fabricated through the crosslinking of the SF of different concentrations with Gallium nitrate (Ga (NO3)3) against Pseudomonas aeruginosa. However, the SF: Ga = 500: 1 (w/w) (SF/Ga) demonstrated a good bactericidal and wound healing effect as a result of the moderate and prolonged release of the Ga3+ following the gradual degradation of the hydrogel. The Ga3+, known for its innovative nature acted as a crosslinked agent and a therapeutic agent employing the “Trojan horse” strategy to effectively deal with the bacteria. Also, the Ga3+, which is positively charged neutralizes the negative potential value of the SF particles to reduce the charge and further induce the β-sheet formation in the protein structure, a characteristic of gelation in SF. The morphology showed a fabricated homogenous structure with greater storage modulus- G’ with low loss modulus- G'' modulus demonstrating the mechanical performance and the ability of the SF/Ga hydrogel to hold their shape, at the same time allowing for the gradual release of Ga3+. A demonstration of biocompatibility, biodegradability, bactericidal effect and wound healing in in vitro and in vivo present the SF/Ga hydrogel as an appropriate platform for therapeutic and for antibacterial wound dressing.
研究领域:
生物材料
·
药剂学
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生物医学工程
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伤口愈合
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抗菌治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Yang You,Bin Luo,Cheng Wang,Hongtu Dong,Xiaodong Wang,Peichen Hou,Lijun Sun,Aixue Li
Gibberellins (GA 3 ) is an ubiquitous plant hormone, which plays a regulatory role in different growth stages of plants, so it is of great significance to develop a sensitive quantitative analysis method for GA 3 . In this study, carboxylated graphene oxide- carboxylated multi-walled carbon nanotubes-Fc (GO-MWNT-Fc) composite material and PDANPs-antibody (PDANPs-Ab) were sequentially modified to screen-printed electrodes (SPEs), and an ultrasensitive probe-free immunosensor for GA 3 was developed. Fc was applied to generate electrochemical signals. GO-COOH and MWNT-COOH can increase the catalytic ability of the sensor and bind the PDANPs-Ab nanoparticles. PDANPs nanomaterial were synthetized by a facile self-polymerization and used to bind with antibody, so as to increase the antibody loading of the sensor. The as-prepared immunosensor has the widest detection range (100 aM-1 mM) and lowest detection limit (17.4 aM) for GA 3 up to date. To our knowledge, it is the first electrochemical immunosensor for GA 3 . By changing the GA 3 antibody to ABA antibody, a sensitive and selective immunosensor for ABA was also fabricated. This immunosensor platform is simple, sensitive, and low cost. It opens broad prospect in on-site applications for biosensors in detecting of various biomolecules in precision agriculture.
研究领域:
农业科学
·
分析化学
·
纳米技术
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植物激素研究
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生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2019
·Vol. 19
·期 23
·5152
·
IF 3.031
Qingmin Wei,Jianjuan Lin,Fa Liu,Changchun Wen,Na Li,Guobao Huang,Zhihui Luo
A surface-enhanced Raman scattering (SERS) tag is proposed for high-sensitivity detection of gibberellin A3(GA3). Silver nanoparticles (AgNPs) were synthesized using citrate reduction. 4-Mercaptobenzoic acid (MBA) was used for the Raman-labeled molecules, which were coupled to the surface of the AgNPs using sulfydryls. MBA was coated with silica using the Stöber method to prevent leakage. GA3antibodies were attached via the active functional groups N-Hydroxysuccinimide (NHS) and N-Ethyl-N’-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) to construct a novel[email protected]2SERS tags. The captured SERS substrates were fabricated through Fe3O4nanoparticles and gold nanoparticles (AuNPs) using chemical methods. These nanoparticles were characterized using ultraviolet-visible spectroscopy (UV–Vis), dynamic light scattering, Raman spectroscopy, transmission electron microscope (TEM), and X-ray diffraction (XRD). This[email protected]2SERS tags has a strong SERS signal based on characterizations via Raman spectroscopy. Based on antigen-antibody reaction, the[email protected]3O4nanoparticles can capture the GA3and[email protected]2SERS tags. Due to the increasing number of captured nanoprobes, the SERS signal from MBA was greatly enhanced, which favored the sensitive detection of GA3. The linear equation for the SERS signal was y = −13635x + 202211 (R2= 0.9867), and the limit of detection (LOD) was 10−10M. The proposed SERS tags are also applicable for the detection of other food risk factors.Keywords:surface-enhanced Raman scattering;[email protected]2core-shell nanoparticles;[email protected]3O4nanoparticle;gibberellin
研究领域:
分析化学
·
纳米技术
·
生物传感器
·
植物科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Feng Chen,Weilong Dai,Xinqi Zhu,Congcong Yao,Junchao Qian,Zhigang Chen,Cheng-bao Liu
Mn-based cathode material Li1.20Mn0.52Ni0.20Co0.08O2 was proposed and ameliorated by surface-coating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and doping Ga3+. X-ray diffraction and high-resolution transmission electron microscopy studies revealed that part of Ga3+ replacing the Ni site could reduce the Li+/Ni2+ mixing by forming a well-ordered layered structure and a homogeneous coating layer of PEDOT:PSS is covered on the surface of Li1.20Mn0.52Ni0.19Co0.08Ga0.01O2. The results of the electrochemical studies demonstrated the higher initial charging–discharging Coulombic efficiency, and outstanding rate capabilities and cyclic performance were obtained for the PEDOT:PSS-covered and Ga3+-doped samples. Especially, 2 wt % PEDOT:PSS-coated Li1.20Mn0.52Ni0.19Co0.08Ga0.01O2 delivered 38.3 mAh g–1, which is larger than the pristine cathode at a 5C high rate. Meanwhile, it could retain 189.6 mAh g–1 (90.3% of its initial discharge capacity at 45 °C) after 300 cycles with a 1C rate, while the pristine cathode only delivered 149.7 mAh g–1 with 80.7% cycling retention left. The results strongly suggested that such PEDOT:PSS-coated and Ga3+-doped Mn-based layered structure materials demonstrated high potential as a cathode candidate especially for high-energy applications.
研究领域:
材料科学
·
电化学
·
能量存储
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）