Journal of Materiomics
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2024
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IF 8.4
Xin Zhou,Chenbin Ai,Xiaojing Wang,Zhen Wu,Jianjun Zhang
Pure ZnO exhibits low photocatalytic H 2 O 2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F – (ZnO/F) by introducing NH 4 F in an aqueous phase photocatalytic system. The F – is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H 2 O 2 production performance of ZnO, with the highest efficiency of 4137.2 μmol·g –1 ·L –1 ·h –-1 . The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F – surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F – , and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F – surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H 2 O 2 reaction. This study has revealed the roles of F – surface modification in the photocatalytic H 2 O 2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.
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Separations
·
2026
·Vol. 13
·期 2
·63
·
IF 3.5
Jingjing Quan,Yuting Zheng,Lan Yao,Lianqing Li,Xingming Ning
The highly efficient performance of photoelectrochemical (PEC) water splitting is largely governed by the construction of active interfaces, especially for the star semiconductor/electrocatalyst system. However, traditional strategies struggle to optimize this critical process. To overcome this challenge, we report a fluorine (F) engineering strategy that enables the synchronous modulation of charge transfer and surface catalytic reaction dynamics in a BiVO4/FeCoOOH-integrated photoanode. Various characterization methods confirm that F engineering can activate the BiVO4/FeCoOOH/electrolyte interfaces. Benefiting from these positive effects, the optimized BiVO4/FeCoOOH-F photoanode achieves a relatively high photocurrent density of 5.46 mA/cm2at 1.23 V vs. RHE, along with outstanding photostability and a small Tafel slope of 96.5 mV dec−1. This study provides new insights into F-based interface manipulation, offering a promising route to developing high-performance semiconductor/electrocatalyst systems for efficient and stable PEC water splitting applications.
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PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
·
2024
·
IF 2.8
Zhe Han,Shengyi Wang,Ao Gao,Meiqi Dong,Yufeng Xiao,Hongyu Pan,Lining Zheng,Hao Zhang
Tomato wilt disease, caused by Fusarium oxysporum f. sp. lycopersici , is a major soil-borne disease affecting tomato cultivation. In this study, two strains exhibiting significant control effects on F. oxysporum f. sp. lycopersici and tomato growth-promoting effects were isolated from the rhizosphere. Through physiological and biochemical identification, as well as 16S rRNA identification, these strains were identified as Enterobacter quasihormaechei L33 and Klebsiella oxytoca TL2, respectively. And the two strains of bacteria were confirmed to have no antagonistic effect through antagonistic compatibility tests. Notably, when these strains were mixed in a ratio of 5:1, they demonstrated remarkable antifungal activity. The mixed strains induced mycelium swelling, necrosis, and rupture in F. oxysporum f. sp. lycopersici , resulting in a 56.65 % inhibition of mycelial fresh weight. Additionally, they inhibited spore production with an inhibition rate of 787.5 %, and the inhibition rate of the lipopeptide produced reached 93.80 % at 50 mg/mL. Furthermore, in potting experiments, the mixed strains reduced the disease incidence by 36.25 % after 8 weeks. Additionally, compared to the control group, the mixed bacterial strain group enhanced fresh weight, plant height, chlorophyll a and b levels, and root activities by 96.31 %, 18.51 %, 184.48 %, 53.03 %, and 44.31 %, respectively. In addition, mixed strains can inhibit the cell wall degrading enzymes produced by Fusarium oxysporum f sp., induce plant defense enzymes, including increased activity of peroxidase, catalase, and superoxide dismutase, and reduce the decrease in malondialdehyde levels. The mixed strains could colonize tomato plant roots. Overall, these findings suggest a potential biocontrol agent deriving from the mixed strains against tomato wilt disease.
研究领域:
植物病理学
·
微生物学
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wei Huang,Lin Zhang,Xuejun Lai,Hongqiang Li,Xingrong Zeng
With the increasing occurrences of industrial oily wastewater emissions and crude oil spills, the deteriorated global environment and ecosystems have attracted a great deal of attention worldwide. Herein we report a highly hydrophobic balsa wood sponge wrapped with fluoroalkyl silane modified reduced graphene oxide (F-rGO@WS) for efficient clean-up of all kinds of oils including viscous crude oil from water. The F-rGO@WS possessed excellent water repellency with a water contact angle of 145°. Owing to high hydrophobicity and longitudinal channels, the F-rGO@WS was successfully applied for separating oil-water mixtures, and the separation efficiency reached 99.0%. Furthermore, the F-rGO@WS also possessed quick electrothermal capability and could be utilized as a filter to efficiently separate viscous crude oil from water by means of the generated Joule heat under a low voltage, and the separation rate was about 10 times higher than that without voltage. Our findings stand out a new tool to fabricate functional natural materials and exhibit great potential in practical applications such as water pollution control and clean-up of viscous crude oil.
研究领域:
环境科学
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材料科学
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溢油修复
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纳米材料
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水污染控制
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ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Caihong Wang,Zihong Pan,Yuanxiang Jin
Chlorinated polyfluorinated ether sulfonate (F–53 B) is a distinct substitute for perfluorooctane sulphonate. It has been reported to be biologically toxic to mammals, causing enteric toxicity, liver toxicity and neurotoxicity. However, studies about the effects of F–53 B on patients with gastrointestinal diseases such as inflammatory bowel disease are very limited. In this study, whether the toxic impacts of F–53 B on the gut and liver can be exacerbated in mice with colitis was explored. The sensitivity of mice with acute colitis caused by dextran sulfate sodium salt (DSS) to F–53 B was compared with that of healthy mice. The mice were administered water containing F–53 B at doses of 10 and 100 μg/L sequentially for two weeks, respectively. F–53 B exposure exacerbated DSS-induced colonic inflammation, including inducing shortening of colon length, inflammatory cell infiltration and more severe histopathological symptoms. In addition, F–53 B administration significantly increased the levels of inflammatory cytokines, including interleukin (IL)-1, IL-6 and tumour necrosis factor-α, in the plasma of mice with enteritis compared with control group. F–53 B impaired intestinal integrity of mice with colitis by downregulating Claudin-1 and antimicrobial peptide-related genes while elevating serum lipopolysaccharide levels. In addition, in mice with colitis, F–53 B increased the levels of serum total cholesterol, triglyceride, low-density lipoprotein cholesterol, aspartate aminotransferase, and alanine aminotransferase, resulted in more severe liver inflammation and increased the level of genes related to the Gasdermin D-mediated pyrolysis . Conclusively, our results indicated that F–53 B delayed the self-healing of ulcerative colitis (UC) and caused liver inflammation in mice. This study provided some new insights into the health risks of F–53 B and raises concerns about the health of individuals with UC.
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CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2022
·
IF 1.193
Linli HOU,Li WANG,Yonghai SONG,Limin LIU
A luminescent hydroxyl-functionalized MIL-53(Al) (OH-MIL-53(Al)) was prepared by one-step solvent thermal method for multiresponsive fluorescence sensor. The OH-MIL-53(Al) exhibited uniform nanospheres with average diameter of 150±20 nm, flexible three-dimensional frameworks, and good dispersion in water. The OH-MIL-53(Al) emitted green fluorescence with a maximum wavelength of 515 nm which showed good fluorescence quenching response for sensing F − and fluorescence enhancement response for water, with good day-to-day stability. The mechanism was based on protonation/deprotonation of hydroxyl group located on OH-MIL-53(Al). Good linear relationship could be found between the luminescence intensity of 515 nm and F − concentrations in the range of 0–60 µM with a determination limit of 70 nM. At the concentrations from 0% to 100%, the fitting curve for water content was in good agreement with the linear equation, and the detection limit was 0.10%. OH-MIL-53(Al) demonstrated excellent fluorescence sensing performance, indicating that it could be used as a multiresponsive sensor to practical application.
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MACROMOLECULES
·
2022
·
IF 6.057
Wenxiang Zhang,Yue Wu,Yinhui Li,Shuhui Chen,Yu Fu,Zhonghui Zhang,Tong Yan,Shanshan Wang,Heping Ma
Efficiently capturing and recycling perfluorinated electron specialty gases (F-gases) with severe greenhouse effects (e.g., long atmospheric lifetime and high global warming potential) from etching exhaust is of great significance to the semiconductor industry. The adsorption separation technique based on a porous adsorbent is considered as an economical and effective method to remove the F-gases in the semiconductor exhaust, benefiting from its low energy consumption and high operational feasibility. Herein, two fluorinated microporous polymers (termed POPTrB-4F and POPTrB-8F) have been synthesized via direct C–H arylation polycondensation. Motivated by their fluorinated pore structure and sturdy covalent bond linkage mode, the separation performances of POPTrB-4F/8F for F-gases under both equilibrium and kinetic conditions were systematically studied. Both experimental results and theoretical calculations show that these two fluorinated polymers can selectively capture F-gases from the simulated etching exhaust. Impressively, the ideal adsorbed solution theory selectivity of POPTrB-4F and POPTrB-8F to SF6 reached 62.88 and 51.55, respectively, at 298.15 K and 1 bar. Moreover, the mechanisms of gas adsorption and separation in porous organic polymers have also been profoundly revealed through simulation calculations based on the density functional theory. These results suggest the possibility of exploiting these fluorinated microporous polymers for the separation of F-gases in an eco-friendly way.
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FUEL
·
2022
·
IF 8.035
Songpeng Cheng,Liangcheng An,Zhenling Li,Suli Liu,Junmin Lv,Subing Fan,Tiansheng Zhao
The products with higher carbon numbers from Fischer-Tropsch (F-T) synthesis are very complex and hard to directly be analyzed on GC due to their very high boiling point. In this work, the qualitative and quantitative analytical method for refined F-T wax samples with C 7 to C 38 was established on GC–MS. All components were well separated, qualified and quantified. The analytical errors were less than ±2 % and the errors of recovery experiments were less than ±5 %. Thereafter, this method was successfully applied in GC analysis with errors less than ±0.75 % and the analytical method on GC was also built, which will provide a more convenience way in analysis of refined F-T wax samples. Based on the obtained analytical conditions and the relative calibration factors of paraffins, the qualitative and quantitative method for the cracking products from refined F-T wax was further built according to a similar method by using simulated samples with the conversion from 5 % to 80 %. The thermal cracking of F-T wax 5# was performed and the content of LAOs in liquid mixtures reached over 50 % at 650 °C. This study simplifies the previous analysis methods which can only be completed by using a variety of standard methods and provide convenience for analysis of refined F-T wax from coal-to-liquid plant.
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Insects
·
2022
·Vol. 13
·期 8
·701
·
IF 3.139
Xue Pan,Yanfang Pei,Cuici Zhang,Yaling Huang,Ling Chen,Liqiong Wei,Chuanren Li,Xiaolin Dong,Xiang Chen
Simple SummaryThe tobacco cutworm,Spodoptera litura(F.), exemplifies strong reproductive capacities and damages many agricultural crops. The insulin signaling pathway is known as a key determinant of female reproduction in insects. However, the detailed molecular mechanisms in these processes are poorly studied. Here, we injected bovine insulin into the newly emerged moth, resulting in gene expression changes in the insulin pathway, while knockdown ofSlInRcaused an inverse gene expression change involved in the insulin pathway. Further studies indicated that the content of JH-III, Vg, total proteins and triacylgycerol could be suppressed bySlInRdsRNA injection. Furthermore, stunted ovaries and lower fecundity were observed by RNAi. Our studies indicated that SlInR plays a key role in JH-III synthesis and the ovarian development inS. litura.AbstractInsulin signaling can regulate various physiological functions, such as energy metabolism and reproduction and so on, in many insects, including mosquito and locust. However, the molecular mechanism of this physiological process remains elusive. The tobacco cutworm,Spodoptera litura, is one of the most important pests of agricultural crops around the world. In this study, phosphoinositide 3-kinase (SlPI3K), protein kinase B (SlAKT), target of rapamycin (SlTOR), ribosomal protein S6 kinase (SlS6K) and transcription factor cAMP-response element binding protein (SlCREB) genes, except transcription factor forkhead box class O (SlFoxO), can be activated by bovine insulin injection. Then, we studied the influence of the insulin receptor gene (SlInR) on the reproduction ofS. liturausing RNA interference technology. qRT-PCR analysis revealed thatSlInRwas most abundant in the head. TheSlPI3K,SlAKT,SlTOR,SlS6KandSlCREBgenes were decreased, exceptSlFoxO,after theSlInRgene knockdown. Further studies revealed that the expression of vitellogenin mRNA and protein, Methoprene-tolerant gene (SlMet), could be down-regulated by the injection of dsRNA ofSlInRsignificantly. Furthermore, a depletion in the insulin receptor by RNAi significantly decreased the content of juvenile hormone III (JH-III), total proteins and triacylgycerol. These changes indicated that a lack ofSlInRcould impair ovarian development and decrease fecundity inS. litura. Our studies contribute to a comprehensive insight into reproduction, regulated by insulin and the juvenile hormone signaling pathway through nutrition, and a provide theoretical basis for the reproduction process in pest insects.Keywords:insulin pathway;juvenile hormone;reproduction;vitellogenin;nutrition
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MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Ying Li,Jiahao Lai,Xiaoni Zheng,Siying Lv,Jing Yang,Shihai Cui
Novel material wool ball-like F-doped BiOCl 0.4 Br 0.3 I 0.3 has been successfully fabricated via a facile solvothermal method. In this work, the as-synthesized catalyst was characterized to examine the structure, morphology, optical and electrochemical properties. The catalyst was used in sulfamethazine degradation under visible-light irradiation. The optimized photocatalyst F-BiOCl 0.4 Br 0.3 I 0.3 (Bi:F = 3:2) exhibits superior activity and the degradation efficiency can reach 99.6 % in pH 6 within 60 min. There are two reasons to explain it: (i) The F-BiOCl 0.4 Br 0.3 I 0.3 has narrow band gap; (ii) Wool ball-like morphology can cause multiple reflections of the irradiated light, and availably prolong the action time. The primary oxidative species are holes and superoxide radicals. The possible degradation mechanism was discussed based on the experimental results.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 3
·616-629
·
IF 2.162
Long Zhang,Qinggang Kong,Fanxin Kong,Taolin Liu,Haiyan Qian
A novel fluorinated chain extender, (1-(ethyl(2-hydroxyethyl)amino)-3- ((3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)oxy)propan-2-ol) (FPO), was synthesized and characterized by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), and elemental analysis. Poly (ether urethane)s containing various amounts of the chain extender with fluorinated side chains (FPUs) were prepared by isophorone diisocyanate (IPDI), polytetra-methylene-ether-glycol (PTMG), 3-aminopropyltriethoxysilane (KH-550), and 1,4-butandiol (BDO). Films of FPUs were investigated by water absorption, contact angle, pencil hardness, adhesive force, and thermal analysis. Coating FPUs on micro-nano concave-convex structure plate realizes superhydrophobic performance. Scanning electron microscope (SEM) and atomic force microscopy (AFM) demonstrated that there is a lot of irregular concave-convex structure, which forms a typical air cushion model. X-ray photoelectron spectroscopy (XPS) analysis showed that surface fluorine content is 165% more than that of film average fluorine content. The superhydrophobic plate with 10% or higher F-containing FPUs coating is of outstanding chemical corrosion resistance, excellent solvent resistance, and wear resistance.
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ANALYST
·
2023
·
IF 4.2
Lihua Xu,Qiong Wang,Yan Liu,Songsen Fu,Yufen Zhao,Shaohua Huang,Biling Huang
Chiral amino-group compounds are of significance for human health, such as biogenic amino acids (AAs), dipeptides, and even various drugs. Enantiospecific discrimination of these chiral compounds is vital in diagnosing diseases, identifying pathological biomarkers and enhancing pharmaceutical chemistry research. Here, we report a simple and rapid 19F NMR-based strategy to differentiate chiral AAs, dipeptides, and amines, that were derivatized with (R)-2-(2-fluorophenyl)-2-hydroxyacetic acid ((R)-2FHA). As a result, 19 proteinogenic AAs (37 isomers) as well as Gly could be concurrently resolved. Moreover, various mirror-image dipeptides, such as Ser–His, Leu–Leu, and Ala–Ala, were commendably recognized. Intriguingly, we found that the absolute configuration of AAs in the N-terminus of dipeptides decided the relative 19F chemical shifts between two enantiomers. Besides, the ability of this method for enantiodiscrimination was further demonstrated by non-AA amines, including aromatic and aliphatic amines, and even amines having chiral centers several carbons away from the amino-group. The structurally similar antibiotics, amoxicillin and ampicillin, were well discriminated. Furthermore, this method accurately determines the de or dr values of non-racemic mixtures. Therefore, our strategy provides an effective approach for 19F NMR-based enantiodiscrimination and diastereomeric purity determination of amino-group compounds.
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