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Vertically aligned NiS nano-flakes derived from hydrothermally prepared Ni(OH)2 for high performance supercapacitor

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Journal of Energy Chemistry 2018年第3期27卷 791-800页

作者： A.M.Patil A.C.lokhande P.A.Shinde J.H.Kim C.d.lokhande Thin Film Physics Laboratory Department of PhysicsSbivaji UniversityKolbapar 416004 MHIndia department of Materials Science and Engineering Chonnam National University 300 Yongbong-DongPuk-GuGwangju.South Korea Centre for Interdisciplinaly Research D.Y.Patil UniversityKolhapurIndia

In present work,the vertically aligned Ni S nano-flakes composed thin film is prepared by anionic exchange process in which hydrothermally prepared Ni（OH）2is used as a parent thin film and Na2S as a sulfide ion *** synthesis process produced fully transformed and shape-controlled nano-flakes of Ni S from nano-flowers of Ni（OH）*** electrochemical supercapacitor properties of Ni S electrode are studied with cyclic voltammetry（CV）,galvonostatic charge discharge（GCd）and electrochemical impedance spectroscopy（EIS）*** porous surface area（85 m^2/g）of Ni S nano-flakes makes large material contribution in electrochemical reaction stretching specific capacitance（Cs）of 880 F/g at scan rate of 5 m V/s and 90%electrochemical stability up to 4000 CV cycles in 2 M KOH ***,the flexible solid-state symmetric supercapacitor device（Ni S/PVA–Li ClO4/Ni S）has been fabricated using Ni S electrodes with polyvinyl alcohol（PVA）–lithium perchlorate（Li ClO4）gel *** Ni S/PVA–Li ClO4/Ni S device exhibits specific capacitance of 56 F/g with specific energy of 14.98 Wh/kg and excellent cycling stability after 2000 *** addition,the Ni S/PVA–Li ClO4/Ni S device demonstrates illumination of red light emitting diode（LEd）for 60 s,which confirms the practical applicability of Ni S/PVA–Li ClO4/Ni S device in energy storage.

关键词： Anionic exchange process Nickel sulfide Nano-flakes Supercapacitor Thin film

Iodine-mediated facile dehydrogenation of dihydropyridazin-3(2H)one

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Chinese Chemical Letters 2011年第12期22卷 1435-1438页

作者： Vivek T.Humne Shankaraiah G.Konda Kamal Hasanzadeh Pradeep d.lokhande Center for Advance Studies Department of ChemistryUniversity of PunePune 411007India

A new protocol for the dehydrogenation of dihydropyridazin-3（2H）-one has been carried out by catalytic amount of iodine in dimethyl sulphoxide in good yield with easy workup.

关键词： dehydrogenation Iodine dihydropyridazin-3(2H)-one Pyridazin-3(2H)-one

Chemical hardness-driven interpretable machine learning approach for rapid search of photocatalysts

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npj Computational Materials 2021年第1期7卷 1850-1862页

作者： ritesh Kumar Abhishek K.Singh Materials Research Centre Indian Institute of ScienceBangaloreKarnataka 560012India

Strategies combining high-throughput(HT)and machine learning(ML)to accelerate the discovery of promising new materials have garnered immense attention in recent *** knowledge of new guiding principles is usually scarce in such studies,essentially due to the‘black-box’nature of the ML ***,we devised an intuitive method of interpreting such opaque ML models through SHapley Additive exPlanations(SHAP)values and coupling them with the HT approach for finding efficient 2d watersplitting *** developed a new database of 30992d materials consisting of metals connected to six ligands in an octahedral geometry,termed as 2dO(octahedral 2d materials)*** ML models were constructed using a combination of composition and chemical hardness-based features to gain insights into the thermodynamic and overall *** importantly,it distinguished the target properties of the isocompositional 2dO materials differing in bond connectivities by combining the advantages of both elemental and structural *** interpretable ML regression,classification,and data analysis lead to a new hypothesis that the highly stable 2dO materials follow the HSAB *** most stable 2dO materials were further screened based on suitable band gaps within the visible region and band alignments with respect to standard redox potentials using the GW method,resulting in 21 potential ***,HfSe_(2)and ZrSe_(2)were found to have high solar-tohydrogen efficiencies reaching their theoretical *** proposed methodology will enable materials scientists and engineers to formulate predictive models,which will be accurate,physically interpretable,transferable,and computationally tractable.

关键词： intuitive formulate visible

Fuel properties and combustion characteristics of some promising bamboo species in India

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Journal of Forestry Research 2014年第2期25卷 471-476页

作者： ritesh Kumar N. Chandrashekar Institute of Wood Science and Technology

We investigated the fuel characteristics of five important bamboo species viz., dendrocalamus strictus, d. brandisii, d. stocksii, Bambusa bambos and B. balcooa. The selected species cover more than 85% of the total growing stock of bamboo in India. Basic density varied from 0.48 to 0.78 ***-3 among the bamboo species studied. Ash content, volatile matter content and fixed carbon content ranged between 1.4%-3.0%, 77.2%-80.8% and 17.6%-21.1%, respectively. Variation in calorific value （18.7-19.6 MJ-kg-l） was marginal. Fuel value index var- ied widely （586-2120） among bamboo species. The highest calorific value （19.6 ***＂l） and fuel value index （2120） were found in B. bal- cooa. Ash elemental analysis revealed that silica and potassium are the major ash forming minerals in bamboo biomass. Silica content ranged from 8.7% to 49.0%, while potassium ranged from 20.6% to 69.8%. We studied combustion characteristics under oxidizing atmosphere. Burning profiles of the samples were derived by applying the derivative thermo- gravimetric technique which is discussed in detail. The five bamboo species were different in their combustion behaviour, mainly due to differences in physical and chemical properties. We compare fuel prop- erties, ash elemental analysis and combustion characteristics of bamboo biomass with wood biomass of Eucalyptus hybrid （Eucalyptus tereticor- his × Eucalyptus camaldulensis）.

关键词： bamboo calorific value ash burning profile Thermogravimetric analysis

Hydrogen peroxide mediates pro-inflammatory cell-to-cell signaling: a new therapeutic target for inflammation?

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Neural Regeneration Research 2019年第8期14卷 1430-1437页

作者： dhanushka Gunawardena ritesh Raju Gerald Münch department of Pharmacology School of Medicine Western Sydney University

Nitric oxide is now universally recognized as an extracellular signaling molecule. Nitric oxide, produced in one cell, diffuses across the extracellular space and acts with targets in an adjoining cell. In this study, we present proof that hydrogen peroxide - like nitric oxide - acts as a true first (intercellular) messenger for a multitude of pro-inflammatory ligands. RAW 264.7 macrophages were activated with three different ligands, lipopolysaccharide, interferon-gamma or advanced glycation end products in the presence of increasing concentrations of (hydrogen peroxide scavenging) catalase. As inflammatory readouts, nitric oxide and tumor necrosis factor were determined. We hypothesize that hydrogen peroxide travels between cells propagating the signal, then a certain percentage of the readout should be inhibited by catalase in a concentration- dependent manner. The experiment showed concentration-dependent inhib让ion of nitric oxide and tumor necrosis factor-a production in response to all three ligands/ligand combinations (interferon-gamma, lipopolysaccharide, and chicken egg albumin-derived advanced glycation end product) in the presence of increasing concentration of catalase. For example, catalase inhibited 100% of nitric oxide and 40% of tumor necrosis factor-a production at its highest concentration. Our results suggest that hydrogen peroxide travels through cell membranes into the extracellular space and enters and activates ad;acent cells. Like rdtric oxide, we suggest that it is a ubiquitous first messenger, able to transmit cell-to-cell pro-inflammatory signals such as nitric oxide and tumor necrosis factor-a. In a therapeutic setting, our data suggest that compounds acting as hydrogen peroxide scavengers might not even need to enter the cell to act as anti-inflammatory drugs.

关键词： Inflammation glycation redox signaling cytokines anti-inflammatory drugs hydrogen peroxide membrane permeable lipopolysaccharide Interferon-gamma signaling

Blockchain-based Peer-to-Peer Transactive Energy System for Community Microgrid with demand Response Management

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CSEE Journal of Power and Energy Systems 2022年第1期8卷 198-211页

作者： Hanumantha Rao Bokkisam Shashank Singh ritesh Mohan Acharya M.P.Selvan National Institute of Technology Tiruchirappalli Tamilnadu 620015India department National Institute of Technology TiruchirappalliTamilnadu 620015India

Interest in transactive energy frameworks(TEFs)is proliferating due to the modern smart grid *** paper proposes a TEF,which applies auction-theory,incorporates a system of agents,and facilitates a transactive energy market(TEM)through an ***,it also enables peer-to-peer(P2P)energy trading among the residential buildings in community microgrid for possible monetary *** this framework,there are three agents,namely,auctioneer,participants,and *** auctioneer is a managing agent modeled using auction theory to determine day-ahead internal market-clearing price and *** participants are autonomous and rational decision-makers;they aim to minimize their electricity bills through the demand response(dR)*** types of architectures,one with the third-party agent demonstrated using the MATLAB environment and the other with the virtual agent(without third-party)implemented using the blockchain environment are *** simulation results reflect significant monetary benefits to each market participant,improved community selfsufficiency,self-consumption,and reduced reliance on the utility grid.

关键词： Blockchain demand response optimization P2P energy trading smart contracts and transactive energy

A symmetric MnO_2/MnO_2 flexible solid state supercapacitor operating at 1.6V with aqueous gel electrolyte

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Journal of Energy Chemistry 2016年第3期25卷 463-471页

作者： Nilesh R.Chodankar deepak P.dubal Girish S.Gund Chandrakant d.lokhande Thin Film Physics Laboratory Department of Physics Shivaji University Catalan Institute of Nanoscience and Nanotechnology CIN2 ICN2 (CSIC-ICN) Campus UAB

The demand of microelectronic devices postulated high energetic flexible energy storage devices. Flexible solid state supercapacitor is flawless possible candidate to fulfill the requirement of microelectronic devices. This investigation provides practical evidence of the use of flexible solid state supercapacitors based on MnOelectrodes with polyvinylpyrrolidone(PVP)-Li ClOgel electrolyte. Initially, different acid mediated growths of MnOhave been carried. Later, the electrochemical performances of MnOelectrodes have been carried out. Impressively, the fabricated symmetric flexible solid state supercapacitor(FSS-SC) device demonstrates the highest operating potential window of 1.6 V with extended cycling stability. Moreover, the cell exhibits high energy density of 23 Wh/kg at power density of 1.9 k W/kg. It is interesting to note that the device shows excellent flexibility upon bending at angle of 180° for number of times. These results clearly evidenced those symmetric FSS-SC devices based on MnOelectrodes are promising energy storage devices for microelectronic applications.

关键词： MnO_2 thin film Polymer gel electrolyte Flexible-all-solid-state supercapacitors

Low-cost high entropy alloy(HEA)for high-efficiency oxygen evolution reaction(OER)

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Nano Research 2022年第6期15卷 4799-4806页

作者： Lalita Sharma Nirmal Kumar Katiyar Arko Parui Rakesh das ritesh Kumar Chandra Sekhar Tiwary Abhisek K.Singh Aditi Halder Krishanu Biswas School of Basic Sciences Advanced Materials Research Centre(AMRC)Indian Institute of Technology Mandi(H.P)KamandMandi 175005India department of Materials Science and Engineering Indian Institute of Technology KanpurKanpur 208016India School of Engineering London South Bank UniversityLondonSE10 AAUK Materials Research Centre Indian Institute of ScienceBangalore 560012India Metallurgical and Materials Engineering Indian Institute of Technology KharagpurKharagpur 382355India

Oxygen evolution reaction(OER)is the key step involved both in water splitting devices and rechargeable metal-air batteries,and hence,there is an urgent need for a stable and low-cost material for efficient *** the present investigation,Co-Fe-Ga-NiZn(CFGNZ)high entropy alloy(HEA)has been utilized as a low-cost electrocatalyst for ***,after cyclic voltammetry activation,CFGNZ-nanoparticles(NPs)are covered with oxidized surface and form high entropy(oxy)hydroxides(HEOs),exhibiting a low overpotential of 370 mV to achieve a current density of 10 mA/cm^(2)with a small Tafel slope of 71 mV/*** alloy has higher electrochemical stability in comparison to state-of-the art RuO2 electrocatalyst as no degradation has been observed up to 10 h of *** electron microscopy(TEM)studies after 10 h of long-term chronoamperometry test showed no change in the crystal structure,which confirmed the high stability of *** density functional theory(dFT)based calculations show that the closeness of d(p)-band centers to the Fermi level(EF)plays a major role in determining active *** work highlights the tremendous potential of CFGNZ HEA for OER,which is the primary reaction involved in water splitting.

关键词： high entropy alloy cyclic voltammetry activation oxygen evolution reaction electrocatalyst nanocrystalline catalyst

Arabidopsis thaliana RECEPTOR dEAd KINASE1 Functions as a Positive Regulator in Plant Responses to ABA

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Molecular Plant 2017年第2期10卷 223-243页

作者： dhinesh Kumar ritesh Kumar dongwon Baek Tae-Kyung Hyun Woo Sik Chung dae-Jin Yun Jae-Yean Kim division of Applied Life Sciences Plant Molecular Biology and Biotechnology Research Center Gyeongsang National University Jinju 660-701 Korea department of Industrial Plant Science and Technology Conege of Agricultural Life and Environmental Sciences Chungbuk National University Cheongju 28644Korea These authors contributed equally to this article.

Abscisic acid （ABA） is a major phytohormone involved in important stress-related and developmental plant processes. Membrane-delimited ABA signal transduction plays an important role in early ABA signaling, but the molecular mechanisms connecting core signaling components to the plasma membrane remain un- clear. Plants have evolved a large number of receptor-like kinases （RLKs） to modulate diverse biological processes by perceiving extracellular stimuli and activating downstream signaling responses. In this study, a putative leucine-rich repeat-RLK gene named RECEPTOR dEAd KINASE1 （AtRdK1） was identified and characterized in Arabidopsis thaliana. RdK1 promoter-GUS analysis revealed that RdK1 is expressed ubiq- uitously in the various tissues in Arabidopsis, and its expression is mainly induced by ABA. In the presence of ABA, RdKl-deficient rdkl-1 and rdkl-2 lines showed significant resistance in cotyledon greening and root growth, whereas RdKl-overexpressing lines showed enhanced sensitivity. Consistently, the expres- sion of ABA-responsive genes was significantly downregulated in rdkl mutant seedlings, which were also hypersensitive to drought stress with increased water loss. Interestingly, RdK1 was found to be an atypical kinase localized to the plasma membrane and did not require its kinase activity during ABA-mediated inhi- bition of seedling development. Accordingly, RdK1 interacted in the plasma membrane with type 2C protein phosphatase ABSClSIC ACId INSENSITIVE1 （ABI1）; this interaction was further enhanced by exogenous application of ABA, suggesting that RdKl-mediated recruitment of ABI1 onto the plasma membrane is important for ABA signaling. Taken together, these results reveal an important role for RdK1 in plant responses to abiotic stress conditions in an ABA-dependent manner.

关键词： ABA abiotic stress Arabidopsis atypical kinases protein phosphatases receptor-like kinases