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Preparation and microstructural characterization of Activated carbon-metal Oxide Hybrid catalysts:New Insights into Reaction Paths

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Journal of materials Science & Technology 2015年第8期31卷 806-814页

作者： A.Barroso-Bogeat m.Alexandre-Franco c.Fernndez-Gonzlez V.Gómez-Serrano Department of Organic and Inorganic chemistry Faculty of SciencesUniversity of Extremadura

In catalysis processes, activated carbon （Ac） and metal oxides （mOs） are widely used either as catalysts or as catalyst supports because of their unique properties. A c.mbination of Ac and mO nanoparticles in a single hybrid material usually entails both chemical and microstructural changes, which may largely influence the potential catalytic suitability and performance of the resulting product. Here, the prepa- ration of a wide series of Ac.mO hybrid catalysts is studied. Three series of such catalysts are prepared by support first of mO （Al2O3, Fe2O3, SnO2, TiO2, WO3, and ZnO） precursors on a granular Ac by wet impregnation and oven-drying at 120 ℃, and by subsequent heat treatment at 200 or 850℃ in inert atmosphere. Both the chemical c.mposition and microstructure are mainly investigated by powder X-ray diffraction. Yield and ash content are often strongly dependent on the mO precursor and heat treatment temperature, in particular for the Sn catalysts. With the temperature rise, trends are towards the transformation of metal hydroxides into metal oxides, crystallinity improvement, and occurrence of drastic c.mposition changes, ultimately leading to the formation of metals in elemental state and even metal carbides. Reaction paths during the preparation are explored for various hybrid catalysts and new insights into them are provided.

关键词： Activated carbon metal oxides Hybrid catalysts Preparation microstructural characterization X-ray diffraction

Evaluation of stereology for snow microstructure measurement and microwave emission modeling:a case study

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International Journal of Digital Earth 2021年第10期14卷 1316-1336页

作者： Jinmei Pan m.T.Durand Z.courville B.J.Vander Jagt N.P.molotch S.A.margulis E.J.Kim m.Schneebeli c.mätzler State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China School of Earth Science and Byrd Polar Research center The Ohio State UniversityColumbusOHUSA US Army corps of Engineers cold Regions Research and Engineering Laboratory HanoverNHUSA Geography Department and Institute of Arctic and Alpine Research University of ColoradoBoulderCOUSA Department of civil and Environmental Engineering University of CaliforniaLos AngelesCAUSA Hydrospheric and Biospheric Sciences Laboratory NASA Goddard Space Flight CenterGreenbeltMDUSA WSL Institute for Snow and Avalanche Research SLF Davos DorfSwitzerland Institute of Applied Physics and Oeschger centre for climate change Research University of BernBernSwitzerland

Reliablemicrostructuremeasurement of snow is a requirement for microwave radiative transfer model *** specific surface area(SSA)can be measured using stereological methods,in which snow samples are cast in the field and photographed in the *** stereology photographs manually by counting intersections of test cycloids with air-ice boundaries reduces the problems in binary *** paper is a case study to evaluate the repeatability of the manually stereology interpretation by two independent research *** further assessed how uncertainty in snow SSA influences simulated brightness temperature(TB)driven by the microwave Emission model of Layered Snowpacks(mEmLS),and how stereology c.mpares to Near Infrared(NIR)c.mera and hand *** was obtained from two alpine snow profiles from Steamboat Springs,*** showed that stereological SSA values measured by two groups are highly consistent,and the ground radiometer measured T_(B)at 19 and 37 GHz was successfully predicted(RmSEmulations using NIR SSA and hand-lens geometric grain size(Dg)measurements have larger *** conclusion was not sensitive to uncertainty in the free parameters of TB modeling.

关键词： microwave radiometry snow stereology snow microstructure mEmLS

Effects of c.mposted and Thermally Dried Sewage Sludges on Soil and Soil Humic Acid Properties

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Pedosphere 2009年第3期19卷 281-291页

作者： J. m. FERNndez N. SENESI c. PLAZA G. BRUNETTI A. POLO centro de ciencias medioambientales Consejo Superior de Investigaciones Científicas Serrano 115 dpdo. 28006 Madrid(Spain) Dipartimento di Biología e chimica Agroforestale e Ambientale University of Bari Via Amendola 165/A 70126 Bari(Italy)

The effect of annual additions of c.mposted sewage sludge (cS) and thermally dried sewage sludge (TS) at 80 t ha-1 on soil chemical properties was investigated for three years in a field experiment under semiarid conditions. Humic acids (HAs) isolated by conventional procedures from cS, TS, and unamended (SO) and sludge amended soils were analysed for elemental (c, H, N, S and O) and acidic functional groups (carboxylic and phenolic) and by ultraviolet-visible, Fourier transform infrared and fluorescence spectroscopies. With respect to cS, TS had similar pH and total P and K contents, larger dry matter, total organic c, total N and c/N ratio and smaller ash content and electrical conductivity. Amendment with both cS and TS induced a number of modifications in soil properties, including an increase of pH, electrical conductivity, total organic c, total N, and available P. The cS-HA had greater O, total acidity, carboxyl, and phenolic OH group contents and smaller c and H contents than TS-HA. The cS-HA and TS-HA had larger N and S contents, smaller c, O and acidic functional group contents, and lower aromatic polycondensation and humification degrees than SO-HA. Amended soil-HAs showed c, H, N and S contents larger than SO-HA, suggesting that sludge HAs were partially incorporated into soil HAs. These effects were more evident with increasing number of sludge applications.

关键词： elemental c.mposition fluorescence spectroscopy Fourier transform infrared spectroscopy functional group c.mposition

Improvements in tribological and anticorrosion performance of porous Ti–6Al–4V via PEO coating

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Friction 2021年第5期9卷 1303-1318页

作者： c.Garcia-cabezón m.L.Rodríguez-méndez V.AmigóBorrás R.Bayón c.Salvo-c.mino c.Garcia-Hernandez F.martin-Pedrosa materials Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain BioecoUVA Research Institute Universidad de ValladolidValladolid 47011Spain Group UVASENS Escuela de Ingenierías IndustrialesUniversidad de ValladolidValladolid 47011Spain Instituto de Tecnología de materials Univesitat Politécnica de ValenciaValencia 46022Spain Tribology Unit Fundación IK4-TeknikerEibar 20600Spain

medical implants manufactured using biomaterial Ti–6Al–4V exhibit some *** higher elastic.modulus than that of natural bone can cause stress shielding *** can be avoided using Ti–6Al–4V with pores in the implant ***,poor corrosion and tribocorrosion behaviors are yielded because of the large area exposed to the *** mitigate both issues,coating technologies can be *** plasma electrolytic oxidation(PEO)process is a cost‐effective process that has been used successfully in nonporous Ti *** this study,two PEO coatings with different amounts of ca/P are ***,reports regarding their application in porous materials are *** effects of PEO treatments on corrosion and tribocorrosion in Ti–6Al–4V powder metallurgy are analyzed *** porous materials provide an efficient surface for PEO coatings,as demonstrated via scanning electron microscopy(SEm)and atomic force microscopy(AFm),and the porosity of the substrates improved the adherence of the *** corrosion resistance measured via electrochemical impedance spectroscopy confirmed the beneficial effect of the coatings,particularly for long exposure *** lower roughness,small pore size,and more c.mpact film observed in the PEO–ca/P sample resulted in favorable tribological and corrosion properties.

关键词： Ti‐based alloys corrosion tribocorrosion surface modification

Ultra‑Transparent and multifunctional IZVO mesh Electrodes for Next‑Generation Flexible Optoelectronics

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Nano-micro Letters 2025年第1期17卷 293-309页

作者： Kiran A.Nirmal Tukaram D.Dongale Atul c.Khot chenjie Yao Nahyun Kim Tae Geun Kim School of Electrical Engineering Korea UniversityAnam‑ro 145Seongbuk‑guSeoulRepublic of Korea c.mputational Electronics and Nanoscience Research Laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India

mechanically durable transparent electrodes are essential for achieving long-term stability in flexible optoelectronic ***,they are crucial for applications in the fields of energy,display,healthcare,and soft *** meshes represent a promising alternative to traditional,brittle,metal oxide conductors due to their high electrical conductivity,optical transparency,and enhanced mechanical *** this paper,we present a simple method for fabricating an ultra-transparent conducting metal oxide mesh electrode using selfcracking-assisted *** this method,we produced an electrode with ultra-transparency(97.39%),high conductance(Rs=21.24Ωsq^(−1)),elevated work function(5.16 eV),and good mechanical *** also evaluated the effectiveness of the fabricated electrodes by integrating them into organic photovoltaics,organic light-emitting diodes,and flexible transparent memristor devices for neuromorphic c.mputing,resulting in exceptional device *** addition,the unique porous structure of the vanadium-doped indium zinc oxide mesh electrodes provided excellent flexibility,rendering them a promising option for application in flexible optoelectronics.

关键词： Self-cracking template Vanadium-doped indium zinc oxide mesh Organic solar cells Organic light-emitting diodes Flexible transparent memory

Effects of six months losartan administration on liver fibrosis in chronic hepatitis c patients: A pilot study

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World Journal of Gastroenterology 2005年第48期11卷 7560-7563页

作者： Silvia Sookoian maría Alejandra Fernández Gustavo casta(n|~)o Instituto de Investigaciones médicas A.Lanari cathedra of Physiopathology Gastroenterology Section

AIm： TO evaluate the safety and efficacy of chronic administration of Iosartan on hepatic fibrosis in chronic hepatitis c patients.mETHODS： Fourteen patients with chronic hepatitis c non-responders （n = 10）, with contraindications （n = 2） or lack of c.mpliance （n = 2） to interferon plus ribavirin therapy and liver fibrosis were enrolled. Liver and renal function test, clinical evaluation, and liver biopsies were performed at baseline and after Iosartan administration at a dose of 50 mg/d during the 6 mo. The control group c.mposed of nine patients with the same inclusion criteria and paired liver biopsies （interval 6-14 mo）. Histological activity index （HAI） with fibrosis stage was assessed under blind conditions by means of Ishak＇s score. Subendothelial fibrosis was evaluated by digital image analyses.RESULTS： The changes in the fibrosis stage were significantly different between Iosartan group （decrease of 0.5±1.3） and controls （increase of 0.89±1.27; P〈0.03）. In the treated patients, a decrease in fibrosis stage was observed in 7/14 patients vs 1/9 control patients （P〈0.04）. A decrease in sub-endothelial fibrosis was observed in the Iosartan group. No differences were found in HAI after Iosartan administration. Acute and chronic decreases in systolic arterial pressures （P〈0.05） were observed after the Iosartan administration, without changes in mean arterial pressure or renal function.cONcLUSION： chronic AT-Ⅱ type 1 receptor （AT1R） blockade may reduce liver fibrosis in patients with chronic hepatitis c.

关键词： Hepatitis c Liver fibrosis Losartan AT1R chronic liver disease Angiotensin Ⅱ

Different effects of a cD14 gene polymorphism on disease outc.me in patients with alcoholic liver disease and chronic hepatitis c infection

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World Journal of Gastroenterology 2005年第38期11卷 6031-6037页

作者： c.meiler m mühlbauer m Johann A Hartmann B Schnabl N Wodarz G Sc.mitz J Schlmerich c Hellerbrand Department of Internal medicine I Department of Psychiatry Department of Pathology Institute for clinical chemistry and Laboratory medicine

AIm： clinical and experimental data suggest that gut-derived endotoxins are an important pathogenic factors for progression of chronic liver disease. Recently, a c-T （-159） polymorphism in the promoter region of the cD14 gene was detected and found to confer increased cD14 expression and to be associated with advanced alcoholic liver damage. Here, we investigated this polymorphism in patients with less advanced alcoholic liver disease （ALD） and chronic hepatitis c virus （HcV） infection. mETHODS： cD14 genotyping was performed by PcR-RFLP analysis in （a） 121 HcV patients, （b） 62 patients with alcohol-associated cirrhosis （AIc-ci）, （c） 118 individuals with heavy alcohol abuse without evidence of advanced liver damage （Alc-w/o ci）, and （d） 247 healthy controls. Furthermore, serum levels of soluble cD14 （scD14） and transaminases were determined. RESULTS： The TT genotype was significantly more frequent in Alc-ci c.mpared to Alc-w/o ci or controls （40.3% vs 23.7% or 24.0%, respectively）. In Alc-w/o ci, serum levels of transaminases did not differ significantly between patients with different cD14 genotypes. In HcV patients, TT-homozygotes had significantly higher scD14 levels and scD14 serum levels were significantly higher in patients with advanced fibrosis or cirrhosis. However, no association was found between cD14 genotypes and histological staging or grading. cONcLUSION： considering serum transaminases as surrogate markers for alcoholic liver damage, the cD14 polymorphism seems to exhibit different effects during the course of ALD. Differences in genotype distribution between cirrhotic HcV patients and alcoholics and the known functional impact of this polymorphism on cD14 expression levels further indicate differences in the pathophysiological role of cD14 and cD14-mediated lipopolysaccharides signal transduction with regard to the stage as well as the type of the underlying liver disease.

关键词： cD14 gene Alcoholic liver disease chronic hepatitis c infection

machine learning empowers efficient design of ternary organic solar cells with Pm6 donor

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Journal of Energy chemistry 2025年第1期100卷 337-347页

作者： Kiran A.Nirmal Tukaram D.Dongale Santosh S.Sutar Atul c.Khot Tae Geun Kim School of Electrical Engineering Korea University c.mputational Electronics and Nanoscience Research Laboratory School of Nanoscience and Biotechnology Shivaji University Yashwantrao chavan School of Rural Development Shivaji University

Organic solar cells(OScs) hold great potential as a photovoltaic technology for practical ***, the traditional experimental trial-and-error method for designing and engineering OScs can be c.mplex, expensive, and time-consuming. machine learning(mL) techniques enable the proficient extraction of information from datasets, allowing the development of realistic.models that are capable of predicting the efficacy of materials with c.mmendable accuracy. The Pm6 donor has great potential for high-performance OScs. However, it is crucial for the rational design of a ternary blend to accurately forecast the power conversion efficiency(PcE) of ternary OScs(TOScs) based on a Pm6 ***, we collected the device parameters of Pm6-based TOScs and evaluated the feature importance of their molecule descriptors to develop predictive models. In this study, we used five different mL algorithms for analysis and prediction. For the analysis, the classification and regression tree provided different rules, heuristics, and patterns from the heterogeneous dataset. The random forest algorithm outperforms other prediction mL algorithms in predicting the output performance of Pm6-based TOScs. Finally, we validated the mL outc.mes by fabricating Pm6-based TOScs. Our study presents a rapid strategy for assessing a high PcE while elucidating the substantial influence of diverse descriptors.

关键词： Random forests

Gas-phase electrocatalytic conversion of cO_2 to chemicals on sputtered cu and cu–c catalysts electrodes

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Journal of Energy chemistry 2019年第4期28卷 46-53页

作者： N.Gutiérrez-Guerra J.A.González J.c.Serrano-Ruiz E.López-Fernández J.L.Valverde A.de Lucas-consuegra Departamento de Ingeniería Química Facultad de Ciencias y Tecnologías Químicas Universidad de Castilla-La Mancha Instituto Regional de Investigación científica Aplicada (IRIcA) and Departamento de Física Aplicada Universidad de Castilla-La Mancha Departamento de Ingeniería Universidad Loyola Andalucía

A novel gas-phase electrocatalytic cell containing a low-temperature proton exchange membrane(PEm)was developed to electrochemically convert cO_2into organic *** different cu-based cathode catalysts(cu and cu–c)were prepared by physical vapor deposition method(sputtering)and subsequently employed for the gas-phase electroreduction of cO_2at different temperatures(70–90°c).The prepared electrodes cu and cu–c were characterized by X-ray diffraction(XRD),X-ray photoemission spectroscopy(XPS)and scanning electron microscopy(SEm).As revealed,cu is partially oxidized on the surface of the samples and the cu and cu–c cathodic catalysts were c.mprised of a porous,continuous,and homogeneous film with nanocrystalline cu with a grain size of 16 and 8 nm,*** influence of the applied current and temperature on the electro-catalytic activity and selectivity of these materials was *** the two investigated electrodes,the pure cu catalyst film showed the highest cO_2specific electrocatalytic reduction rates and higher selectivity to methanol formation c.mpared to the cu–c electrode,which was attributed to the higher particle size of the former and lower cu O/cu *** obtained results show potential interest for the possible use of electrical renewable energy for the transformation of cO_2into valuable products using low metal loading cu based electrodes(0.5 mg cu cm^(-2))prepared by sputtering.

关键词： cO_2 valorization Electro-reduction cu catalyst PEm Selectivity methanol production