Advances in Materials Physics and Chemistry最新文献

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Combustion Derived SrTiO3: Synthesis, Characterization and Evaluation of Electrochemical Behavior Towards Quantification of Hg(II) Ions 燃烧衍生SrTiO3:合成、表征及对Hg(II)离子定量的电化学行为评价
Advances in Materials Physics and Chemistry Pub Date : 2019-05-22 DOI: 10.18282/MPC.V1I2.572
K. Manjunath, P. Adarakatti, P. Malingappa, G. Chandrappa
{"title":"Combustion Derived SrTiO3: Synthesis, Characterization and Evaluation of Electrochemical Behavior Towards Quantification of Hg(II) Ions","authors":"K. Manjunath, P. Adarakatti, P. Malingappa, G. Chandrappa","doi":"10.18282/MPC.V1I2.572","DOIUrl":"https://doi.org/10.18282/MPC.V1I2.572","url":null,"abstract":"In this work, we are reporting the synthesis of porous SrTiO3 nanoparticles by using solution combustion route employing strontium nitrate and titanium-peroxo complex as oxidizer. The results of physico-analytical techniques revealed that SrTiO3 have a relatively small particle size, good dispersibility and diminished agglomeration. Powder X-ray diffraction pattern shows cubic perovskite structure (space group Pm3m) and the morphology was observed using a scanning electron microscope. The band gap of 3.24 eV was calculated using the diffuse reflectance spectrum. The surface area (~26.51 m2/g) of SrTiO3 was measured by BET method. SrTiO3 nanoparticles show violet-blue-green photoluminescence emission spectrum at room temperature. The photocatalytic degradation was carried out to investigate the photocatalytic activity of SrTiO3 under UV-light and evaluated for the electrochemical quantification of Hg(II) ions in aqueous solution using differential pulse anodic stripping voltammetry. The results reveal that SrTiO3 nanoparticles show better quantification result for Hg(II) ions. ","PeriodicalId":7338,"journal":{"name":"Advances in Materials Physics and Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86481263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Influence of the Metal Microstructure on the Breakdown Mechanism of Schottky Diodes 金属微结构对肖特基二极管击穿机理的影响
Advances in Materials Physics and Chemistry Pub Date : 2018-10-15 DOI: 10.18282/MPC.V1I1.565
S. Askerov, M. Gasanov, L. KAbdullayeva
{"title":"The Influence of the Metal Microstructure on the Breakdown Mechanism of Schottky Diodes","authors":"S. Askerov, M. Gasanov, L. KAbdullayeva","doi":"10.18282/MPC.V1I1.565","DOIUrl":"https://doi.org/10.18282/MPC.V1I1.565","url":null,"abstract":"In this paper, the influence of the microstructure of a metal on the breakdown mechanism of diodes with a Schottky barrier is studied. It is shown that in electronic processes occurring in the contact between a metal and a semi-conductor, the metal plays a very active role and is a more important contact partner than a semiconductor. Unlike the known mechanisms of breakdown of diodes (avalanche, tunnel and thermal), another mechanism is proposed in this paper - the geometric mechanism of the reverse current flow of Schottky diodes made using a metal with a poly-crystalline structure. The polycrystallinity of a metal transforms a homogeneous contact into a complex system, which consists of parallel-connected multiple elementary contacts having different properties and parameters.","PeriodicalId":7338,"journal":{"name":"Advances in Materials Physics and Chemistry","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87046175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Controllable Synthesis of h-WO3 Nanoflakes by L-lysine Assisted Hydrothermal Route and Electrochemical Characterization of Nanoflakes Modified Glassy Carbon Electrode l -赖氨酸辅助水热法制备h-WO3纳米片及其修饰玻碳电极的电化学表征
Advances in Materials Physics and Chemistry Pub Date : 2018-09-21 DOI: 10.18282/MPC.V1I1.567
Vijayakumar Gangaiah, Ashoka Siddaramanna, P. Adarakatti, G. Chandrappa
{"title":"Controllable Synthesis of h-WO3 Nanoflakes by L-lysine Assisted Hydrothermal Route and Electrochemical Characterization of Nanoflakes Modified Glassy Carbon Electrode","authors":"Vijayakumar Gangaiah, Ashoka Siddaramanna, P. Adarakatti, G. Chandrappa","doi":"10.18282/MPC.V1I1.567","DOIUrl":"https://doi.org/10.18282/MPC.V1I1.567","url":null,"abstract":"Hexagonal tungsten trioxide (h-WO3) nanoflakes have been synthesized by a hydrothermal approach using L-lysine as the shape directing agent. The influence of hydrothermal reaction time and L-lysine content on the morphology of h-WO3 was investigated. The experimental results showed that the nanoflake morphology could be achieved at higher concentration of L-lysine. Based on the evolution of nanoflake morphology as a function of hydro-thermal duration, a “dissolution-crystallization-Ostwald ripening” growth mechanism has been proposed. The electro-chemical performance of h-WO3 nanoflakes has also been investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It is found that h-WO3 modified glassy carbon electrode (GCE) showed lower charge transfer resistance and enhancement in peak current attributed to the enrichment in electroactive surface area and faster electron transfer kinetics at h-WO3 modified GCE.","PeriodicalId":7338,"journal":{"name":"Advances in Materials Physics and Chemistry","volume":"207 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76958440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Mathematical Modeling of Hydraulic Resistance in Pipes With Rough Walls 粗糙壁管道水力阻力的数学建模
Advances in Materials Physics and Chemistry Pub Date : 2018-03-23 DOI: 10.18282/mpc.v1i1.566
Lobanov Igor Evgenjevich
{"title":"Mathematical Modeling of Hydraulic Resistance in Pipes With Rough Walls","authors":"Lobanov Igor Evgenjevich","doi":"10.18282/mpc.v1i1.566","DOIUrl":"https://doi.org/10.18282/mpc.v1i1.566","url":null,"abstract":"In recent years, the numbers of patents have been devoted to the development of rough pipes. The technique theoretical settlement determine of factor of hydraulic resistance for round pipes with rough walls is developed on the basis of a principle of a superposition of complete viscosity in turbulent a layer mainly distinguished from the existing theories. The received results of account for the extended range of determining parameters much distinguished from appropriate given for round pipes with turbulizers, specify a level и intensification of heat exchange.","PeriodicalId":7338,"journal":{"name":"Advances in Materials Physics and Chemistry","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74454378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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