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Progress in Na 2 fePO 4 f cathodes for energy storage: fabrication, modification and application

Chinese Chemical Letters 2024年

作者： Yanqiu Xu Xuanli Chen Yin Li Keyu Zhang Shaoze Zhang Junxian Hu Yaochun Yao National Engineering Research Center of Vacuum Metallurgy Faculty of Metallurgy and Energy Engineering Kunming University of Science and Technology Kunming 650093 China

Sodium-ion batteries (SIBs) are the promising rechargeable batteries in large-scale energy storage systems for their low cost, high safety, wide temperature range adaptability, environmental friendliness and excellent fast-charging capabilities. Significant research endeavors in SIBs have focused on the exploration of high-performance electrode materials and thorough investigation of their mechanisms. Na 2 fePO 4 f (NfPf) is one of potential cathode materials because of low cost, minimal volume strain and extended cycle performance. This review summarizes the crystal structure, sodium ion migration pathways, and synthesis methods of NfPf and discusses the effect of various strategies including hybridization with carbon materials, ion doping, morphology control and electrolyte optimization on its electrochemical performance. Additionally, the application of the NfPf in different batteries is summarized. finally, the challenges and future directions of NfPf are proposed. This review is both timely and important for promoting the applications of cost-effective NfPf.

关键词： Na 2 fePO 4 f Sodium-ion batteries Modification strategies Synthesis methods Applications

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Block NLMS/f-based equalizer design and channel capacity analysis for indoor IEEE 802.11 fading wireless channels

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SIGNAL IMAGE AND VIDEO PROCESSING 2019年第4期13卷 693-701页

作者： Mohanty, Basabadatta Sahoo, Harish K. Patnaik, Bijayananda IIIT Dept Elect & Telecommun Engn Bhubaneswar India VSSUT Dept Elect & Telecommun Engn Burla India

In this paper, adaptive decision feedback-based model is used to design an efficient equalizer to mitigate the detrimental effects during the signal transmission through wireless channels having non-ideal frequency response. The proposed adaptive equalizer is designed using normalized block least mean square/fourth algorithm which yields low bit error rate and mean square error in spite of high noisy and fading channel conditions. The constellations as well as eye diagrams are also taken as performance measuring criteria for indoor wireless channel which is designed by using IEEE 802.11 model with exponential power delay profile. The channel capacity using the proposed model is also analyzed to verify the system performance. Combination of block processing approach and the elegant structure of the equalizer achieves higher symbol estimation accuracy and stable convergence which is quite suitable for indoor fading channel characteristics. The performance comparison of the proposed model is presented with detail simulation results.

关键词： ISI LMS LMf LMS f Decision feedback equalizer PDP

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Making moral decisions with artificial agents as advisors. A f NIRS study

Computers in Human Behavior: Artificial Humans

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Computers in Human Behavior: Artificial Humans 2024年第2期2卷

作者： Eve florianne fabre Damien Mouratille Vincent Bonnemains Grazia Pia Palmiotti Mickael Causse ISAE Supaero 10 avenue Edouard Belin 31400 Toulouse France Ecole National de l’Aviation Civile 7 Avenue Edouard Belin 31400 Toulouse France DTIS ONERA 2 Avenue Edouard Belin 31000 Toulouse France

Artificial Intelligence (AI) is on the verge of impacting every domain of our lives. It is increasingly being used as an advisor to assist in making decisions. The present study aimed at investigating the influence of moral arguments provided by AI-advisors (i.e., decision aid tool) on human moral decision-making and the associated neural correlates. Participants were presented with sacrificial moral dilemmas and had to make moral decisions either by themselves (i.e., baseline run) or with AI-advisors that provided utilitarian or deontological arguments (i.e., AI-advised run), while their brain activity was measured using an f NIRS device. Overall, AI-advisors significantly influenced participants. Longer response times and a decrease in right dorsolateral prefrontal cortex activity were observed in response to deontological arguments than to utilitarian arguments. Being provided with deontological arguments by machines appears to have led to a decreased appraisal of the affective response to the dilemmas. This resulted in a reduced level of utilitarianism, supposedly in an attempt to avoid behaving in a less cold-blooded way than machines and preserve their (self-)image. Taken together, these results suggest that motivational power can led to a voluntary up- and down-regulation of affective processes along moral decision-making.

关键词： Moral dilemma Decision-making Artificial intelligence Advisor f NIRS

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Preparation, characterisation and enhanced photocatalytic activities of fe,f co-doped TiO2 nanotubes

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MICRO & NANO LETTERS 2019年第1期14卷 66-68页

作者： Yu, Zhuanni Lan, Jing Wang, Qiang Qingdao Agr Univ Coll Chem & Pharmaceut Sci Qingdao 266109 Peoples R China

fe,f co-doped TiO2 nanotubes (fe,f/TiO2 NTs) were synthesised by the combination of hydrothermal process and impregnation method. The structure and composition of prepared catalysts were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). XRD results confirmed only the presence of the anatase phase in fe,f/TiO2 NTs. Well-defined TiO2 NTs with nearly uniform diameters could be seen from the TEM images. Also, the high-resolution XPS spectra of fe 2P and f 1s showed that fe3+ and f- existed in TiO2 lattice and on the surface of TiO2, respectively. The photocatalytic performances of fe/TiO2 NTs and fe,f/TiO2 NTs with different fe concentrations were evaluated by photo-degrading aqueous methyl orange under visible light irradiation, and the results showed that the photoactivity of fe and f co-doped TiO2 NTs was enhanced obviously compared with fe mono-doped TiO2 NTs and the 0.5% fe,f/TiO2 NTs presented the best photocatalytic performance.

关键词： catalysts transmission electron microscopy catalysis ultraviolet spectra X-ray photoelectron spectra semiconductor materials semiconductor nanotubes iron nanofabrication nanoparticles titanium compounds visible spectra X-ray diffraction photochemistry scanning electron microscopy semiconductor growth enhanced photocatalytic activities fe monodoped TiO2 nanotubes hydrothermal process impregnation method XRD X-ray diffraction TiO2:fe f time 1 0 s visible light irradiation photodegrading aqueous methyl orange TiO2 lattice f 1s fe 2P TEM images high-resolution XPS spectra anatase phase X-ray photoelectron spectroscopy TEM transmission electron microscopy

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fabrication of visible-light induced fluorine doped bismuth oxide (Bi 2 O 3-x f x ) photocatalyst in degrading textile dyes from wastewater

Chemistry of Inorganic Materials

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Chemistry of Inorganic Materials 2023年 1卷

作者： Ashok Kumar Chakraborty S.M. Abdur Razzaque Md Ahsanul Haque Afroza Akter Sumon Ganguli Md. Nazrul Islam Alam S.M. Nur Md Abdus Sabur Department of Applied Chemistry and Chemical Engineering Islamic University Kushtia 7003 Bangladesh Department of Applied Chemistry and Chemical Engineering University of Chittagong Chittagong 4331 Bangladesh Department of Chemical Engineering Jashore University of Science and Technology Jashore 7408 Bangladesh Department of Chemistry Jahangirnagar University Savar Dhaka 1342 Bangladesh

Discharge of unused and untreated dye effluents into the environment by the textile industries is a major issue. In this wastewater, the methylene blue (MB) and methyl orange (MO) remain in a dissolved state along with various pollutants at different levels. To remove these dyes, visible light (λ ≥ 420 nm) active f (fluorine) doped bismuth oxide (Bi 2 O 3-x f x ) photocatalyst was synthesized through facile sol-gel method utilizing bismuth oxide (Bi 2 O 3 ) and hydrofluoric acid (Hf). Bi 2 O 3-x f x demonstrated enhanced photocatalytic activity to decompose methylene blue (MB) and methyl orange (MO) under visible light. The f content in Bi 2 O 3-x f x composite was optimized to 0.94 atom % with respect to organics decomposition. The study showed that enhanced photocatalytic activity of Bi 2 O 3-x f x was ascribed due to participation of photo-induced electron (e¯)-hole (h + ) in photocatalysis. The existence of hole (h + ) and the generated °OH radical was experimentally confirmed in aqueous medium. The formation mechanism of these reactive species was explained on the basis of relative energy band position of Bi 2 O 3-x f x and a detail photocatalytic decomposition reaction mechanism was proposed.

关键词： Bi 2 O 3-x f x Crystal lattice Organic pollutants Photocatalytic decomposition Wastewater

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A new furan derivative from an endophytic Aspergillus tubingensis of Decaisnea insignis (Griff.) Hook.f. & Thomson

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NATURAL PRODUCT RESEARCH 2019年第19期33卷 2777-2783页

作者： Yang, Xiu-fang Wang, Ning-ning Kang, Yi-fan Ma, Yang-min Shaanxi Univ Sci & Technol Minist Educ Key Lab Auxiliary Chem & Technol Chem Ind Xian 710021 Shaanxi Peoples R China

A new furan derivative named 3-(5-oxo-2,5-dihydrofuran-3-yl) propanoic acid (1) was isolated for the first time. Its structure was elucidated by UV, IR, NMR, HR-ESI-MS and the single-crystal X-ray diffraction spectroscopic data. Meanwhile, the antifungal and antibacterial activities of compound 1 was tested, it exhibited potent antifungal activity against fusarium graminearum with MIC value of 16 mu g/mL and medium antibacterial activity against Streptococcus lactis with MIC value of 32 mu g/mL.

关键词： furan derivative 3-(5-oxo-2 5-dihydrofuran-3-yl) propanoic acid Aspergillus tubingensis Decaisnea insignis (Griff ) Hook f & Thomson

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Volatile components and nutritional qualities of Viscum articulatum Burm.f. parasitic on ancient tea trees

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fOOD SCIENCE & NUTRITION 2019年第9期7卷 3017-3029页

作者： Wang, Qiushuang Chen, Dong Zhang, Qianwen Qin, Dandan Jiang, Xiaohui Li, Hongjian fang, Kaixing Cao, Junxi Wu, Hualing Guangdong Acad Agr Sci Tea Res Inst Guangdong Key Lab Tea Plant Resources Innovat & U Guangzhou Guangdong Peoples R China Mississippi State Univ Dept Plant & Soil Sci Starkville MS USA

Volatile flavor compounds (VfCs) and nutrients in Viscum articulatum Burm.f. parasitic on ancient tea trees (named TM) were studied in this research by headspace solid-phase microextraction (HS-SPME)/gas chromatography-mass spectrometry (GC-MS) and conventional methods. Sixty-six volatile compounds belonging to different classes were identified by GC-MS. The ketones, alcohols, and aldehydes were the principal aroma groups in TM according to principle component analysis (PCA). The most abundant aroma components in TM included benzaldehyde (9.64%), geranylacetone (7.92%), epoxy-beta-ionone (7.71%), beta-linalool (7.35%), methyl salicylate (6.96%), and hotrienol (6.14%), significantly higher than CKs (p < .05). The positive PC1 and PC2 in TM were correlated with benzaldehyde, hotrienol, methyl salicylate, and geranylacetone. The mistletoes could be differentiated from CKs due to the difference in aroma compounds. Clean and fresh, woody and nutty odor with minor floral scent was the characteristics of TM. Analysis of the nutritional components showed that contents of polyphenols and catechins in TM were at trace levels, significantly lower than CKs (p < .05). The total contents of polyphenols, amino acids, carbohydrates, and caffeine in TM were significantly lower from the total soluble solids (p < .05), indicating that there were still lots of compounds undetected in TM. The sensory test showed that the taste and aroma in TM can be accepted, which indicates TM could be developed into alternative tea drinks in the future.

关键词： aroma nutrients Viscum articulatum Burm f

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Acacia catechu (L.f.) Willd and Scutellaria baicalensis Georgi extracts suppress LPS-induced pro-inflammatory responses through Nf-kB, MAPK, and PI3K-Akt signaling pathways in alveolar epithelial type II cells

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PHYTOTHERAPY RESEARCH 2019年第12期33卷 3251-3260页

作者： feng, Tian Zhou, Liying Gai, Shouchang Zhai, Yumeng Gou, Nan Wang, Xingchen Zhang, Xinyu Cui, Minxuan Wang, Libin Wang, Siwang Air Force Med Univ Sch Pharm Dept Chinese Mat Med & Nat Med 169 Changlexi St Xian 710032 Shaanxi Peoples R China Shaanxi Univ Chinese Med Coll Pharm Xianyang Peoples R China Air Force Med Univ Sch Pharm Dept Med Chem & Pharmaceut Anal Xian Shaanxi Peoples R China Northwest Univ Coll Life Sci & Med Xian Shaanxi Peoples R China

Acacia catechu (L.f.) Willd (ACW) and Scutellaria baicalensis Georgi (SBG) are one of the most famous couplet Chinese medicines, widely used for treating infantile cough, phlegm, and fever caused by pulmonary infection. However, the underlying molecular mechanism of their anti-inflammatory activity has not been determined. The aim of this study was to evaluate the protective effect of this couplet Chinese medicines (ACW-SBG) on lipopolysaccharide (LPS)-induced inflammatory responses in acute lung injury (ALI) model of rats and the potential molecular mechanisms responsible for anti-inflammatory activities in alveolar epithelial type II cells (AEC-II). Standardization of the 70% ethanol extract of ACW and SBG was performed by using a validated reversed-phase high-pressure liquid chromatography method. Rats were pretreated with ACW-SBG for 7 days prior to LPS challenge. We assessed the effects of ACW-SBG on the LPS-induced production of tumor necrosis factor alpha (TNf-alpha) and interleukin 1 beta (IL-1 beta) in the bronchoalveolar lavage fluid (BALf). The wet-to-dry weight ratio was calculated, and hematoxylin and eosin staining of lung tissue was performed. Cell viability of AEC-II was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Real-time quantitative reverse transcription polymerase chain reaction assay was carried out to quantify the relative gene expression of TNf-alpha and IL-1 beta in AEC-II. The western blotting analysis was executed to elucidate the expression of mediators linked to nuclear factor-kappa B (Nf-kappa B), mitogen-activated protein kinase (MAPK), and phosphatidylinositol-3 kinase-protein kinase B (PI3K-Akt) signaling pathways. ACW-SBG significantly decreased lung wet-to-dry weight ratio, ameliorated LPS-induced lung histopathological changes, and reduced the release of inflammatory mediators such as TNf-alpha and IL-1 beta in BALf. In AEC-II, we found that the expression of TNf-alpha mRNA was also inhibited by

关键词： Acacia catechu (L f ) Willd MAPKs Nf-kappa B PI3K-Akt pro-inflammatory cytokines Scutellaria baicalensis Georgi

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Highly efficient Doherty power amplifier using continuous inverse class-f and class-J hybrid mode

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INTERNATIONAL JOURNAL Of Rf AND MICROWAVE COMPUTER-AIDED ENGINEERING 2020年第12期30卷 e22464-e22464页

作者： Wang, Tao Cheng, Zhiqun Liu, Guohua Hangzhou Dianzi Univ Sch Elect & Informat Engn Hangzhou Peoples R China

A continuous inverse class-f (CCf-1) and class-J hybrid mode for the carrier power amplifier (PA) of the Doherty power amplifier (DPA) is proposed in this paper. In this hybrid mode, the carrier PA works in the CCf-1 mode at the saturated output power and the class-J mode at the low output power, which extends the design space of the conventional single continuous mode. A highly efficient Doherty power amplifier based on this hybrid mode is designed and fabricated using a CGH40010f 10 W GaN HEMT packaged device. The measurement results illustrate that drain efficiency (DE) of 67.2% to 81.7% at the saturated output power (Pout) and 50.4% to 60.1% at 6 dB output back-off (OBO) is achieved across the band 1.5 to 2.1 GHz with the saturated output power is about 43.3 to 44.6 dBm.

关键词： class‐ J continuous inverse class‐ f Doherty power amplifier hybrid mode

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SO 2 f 2 -Promoted Dehydration of Aldoximes: A Rapid and Simple Access to Nitriles

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SYNLETT 2019年第12期30卷 1484-1488页

作者： Zhao, Yiyong Mei, Guangyao Wang, Haibo Zhang, Guofu Ding, Chengrong Zhejiang Univ Technol Coll Chem Engn Hangzhou 310014 Zhejiang Peoples R China Zhejiang Hongyuan Pharmaceut Co Ltd Linhai 317016 Peoples R China

A rapid, simple and mild process for the dehydration of aldoximes to give the corresponding nitriles, which utilizes SO2f2 as an efficient reagent, has been developed. A variety of (hetero) arene, alkene, alkyne and aliphatic aldoximes proceeded with high efficiency to afford nitriles in excellent to quantitative yields with great functional group compatibilities in acetonitrile under ambient conditions. furthermore, an eco-friendly synthetic protocol to access nitriles from aldehydes with ortho-, meta-and para-nitrile groups was also described in aqueous methanol by using inorganic base Na2CO3, and a one-pot synthetic strategy to generate nitriles from aldehydes was proved to be feasible.

关键词： SO (2) f (2) aldoxime nitrile dehydration CH (3) CN aqueous methanol

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