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oe1(光电查) - 科学论文

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出版时间
  • 2019
研究主题
  • charge – discharge energy efficiency
  • Lithium-ion battery
  • degradation diagnosis
  • photovoltaic surplus energy
  • working electric vehicle
应用领域
  • Electrical Engineering and Automation
机构单位
  • Ritsumeikan University
493 条数据
?? 中文（中国） ▾

  • [IEEE 2018 International Russian Automation Conference (RusAutoCon) - Sochi, Russia (2018.9.9-2018.9.16)] 2018 International Russian Automation Conference (RusAutoCon) - Reliability Prediction of Radio Frequency Identification Passive Tags Power Supply Systems Based on A<inf>3</inf>B<inf>5</inf> Resonant-Tunneling Diodes

    摘要： The methodology of predicting radio frequency identification (RFID) passive tag power supply system reliability is developed. The reliability of a RFID passive tag power supply system is estimated in terms of a parametric failure associated with the I-V characteristics drift of resonant-tunneling diodes (RTD) that are a part of the tag rectifier under the influence of external factors beyond the tolerance limits. The methodology of the time to failure of the RFID passive tag power supply system calculation by the criterion of the minimum permissible range is presented. The developed methodology can be used in the design of RFID systems with passive UHF and SHF tags to predict their reliability under specified operating conditions. The developed algorithms and software modules can be integrated into the corresponding CAD systems.

    关键词： passive tag,resonant-tunneling diode,degradation,radio frequency identification,I-V characteristic,reliability,power supply system

    更新于2025-09-10 09:29:36

  • Cu2-xS loaded diatom nanocomposites as novel photocatalysts for efficient photocatalytic degradation of organic pollutants

    摘要： Diatom frustules with hierarchical structures have been widely investigated in many fields due to their unique optical features, excellent mechanical resistance and extraordinarily intricate pore patterns. Herein, Cu2-xS modified diatomite has been successfully fabricated for the first time via a mild method at room temperature. The Cu2-xS nanoparticles with diameters of 50–100 nm were uniformly distributed on the diatomite. The as-prepared Cu2-xS-diatomite (Cu2-xS-DE) exhibits excellent photocatalytic degradation efficiencies for MB and MO, which reach to 99.1% and 96.9% respectively in 40 min under the irradiation of UV–vis light with 20 mg photocatalyst. The degradation mechanism of the organic pollutant over the Cu2-xS-DE/H2O2 reaction system was also proposed. This work provides an effective strategy to design and prepare of the diatom-based nanomaterials with efficient photocatalytic degradation activity, which is of great value for the environmental applications.

    关键词： Diatom,Cu2-xS,Photocatalyst,Organic pollutant,Degradation

    更新于2025-09-10 09:29:36

  • [IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - The Addition of Temperature Significantly Improves the Detection of Land Degradation in Cold Drylands Using the TSS-RESTREND Methodology

    摘要： Cold drylands make up 20% of the world’s water limited regions. This paper presents a modification to the Time Series Segmented – RESidual TRENDs (TSS-RESTREND) method which allows for the use of temperature as an additional explanatory variable along with precipitation. TSS-RESTREND was performed over Mongolia both with and without temperature. The addition of temperature reduced the number of pixels that fail the significance tests built into the TSS-RESTREND method from 17% to below 5%. It also improved the statistical confidence in almost all areas. Furthermore, the direction of change is consistent with previous findings that looked at vegetation trends over the same study region.

    关键词： Drylands,Mongolia,TSS-RESTREND,Land Degradation

    更新于2025-09-10 09:29:36

  • An affordable photocatalyst for pharmaceuticals and superior electro catalyst for methanol oxidation - A dual role by CuWO4 anchored bentonite clay

    摘要： In this present study, we developed a novel bentonite loaded CuWO4 nanoparticles (BEN-CuWO4 NPs) through the simple hydrothermal method. The as-prepared BEN-CuWO4 NPs was systematically characterized by various spectroscopic techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field emission scanning electron microscopy (FESEM), High resolution transmission electron microscopy (HR-TEM), DRS-UV visible spectroscopy, Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS) and Photoluminescence (PL) techniques. For the first time, the BEN-CuWO4 NPs were utilized as a bifunctional catalyst for the photodegradation of Diclofenac sodium (DFS) and electrooxidation of methanol. More distinctively, the BEN-CuWO4 NPs exhibited excellent photocatalytic activity could degrades above 94% DFS solution under visible light illumination with superior stability. Further, BEN-CuWO4 NPs portrayed superior electrocatalytic activity for the oxidation of methanol when compared to the pristine CuWO4. In addition, Impedance studies revealed that the BEN-CuWO4 NPs holds the tremendous dielectrical properties. This present investigation opens a new door way for the synthesis of multifunctional nanostructured materials for practical energy and environmental applications.

    关键词： Photo degradation,Electrochemical studies,Bentonite clay,Copper tungstate,Hydrothermal,Diclofenac sodium

    更新于2025-09-10 09:29:36

  • Photoelectrochemical removal of chlorfenvinphos by using WO3 nanorods: influence of annealing temperature and operation pH

    摘要： A visible-light driven photoelectrochemical degradation process has been applied to a solution polluted with the organophosphate insecticide chlorfenvinphos. Different WO3 nanosheets/nanorods have been used as photoanodes. These nanostructured electrodes have been fabricated by anodization of tungsten and, subsequently, they have been subjected to a thermal treatment (annealing). The combined influence of annealing temperature (400o C and 600o C) and operation pH (1 and 3) on the photoelectrocatalytic behavior of these nanorods has been examined through a statistical analysis. Morphological, structural and photoelectrochemical characterizations have also been carried out. The chlorfenvinphos degradation efficiency depended both on annealing temperature and, specially, operation pH. At pH 1 and using an annealing temperature of 600o C, chlorfenvinphos has been effectively degraded following pseudo-first order kinetics with a coefficient of 7.8×10-3 min-1, and notably mineralized (more than 65% of Total Organic Carbon decrease).

    关键词： anodization,WO3 nanorods,chlorfenvinphos,regression model,Photoelectrochemical degradation

    更新于2025-09-10 09:29:36

  • The effect of manganese doping on structural, optical, and photocatalytic activity of zinc oxide nanoparticles

    摘要： In this work, polyethylene glycol-6000 (PEG-6000) capped ZnO nanoparticles (NPs) were synthesized by doping with varying levels of Mn (0, 1, 2, 3, and 4 wt.%; 0% implies no doping). The crystalline sizes of the hexagonal wurtzite-structured nanoparticles, when measured with (4%) and without Mn doping (0%), were 30 and 28 nm, respectively. The Mn doping led to a shift of the ZnO optical band gap from 3.36 to 3.51 eV. The Mn2+ ions from the doping agent caused tail states in the absorbance spectrum of ZnO NPs, allowing them to be used as effectual UV photocatalysts for the degradation of organic contaminants (e.g., methyl orange (MO), methylene blue (MB), and congo red (CR)). This effect was optimized when doped with 4% Mn. When comparing 0 and 4% Mn doping, the degradation efficiency of the three contaminants was approximately 87/93.5 (MO), 85/88 (MB), and 86/93 (CR)%, respectively. Accordingly, Mn doping on ZnO NPs was found to significantly enhance their photo-degradation efficiency.

    关键词： Mn-ZnO,photocatalytic degradation,organic contaminants,UV irradiation,semiconductor nanoparticles

    更新于2025-09-10 09:29:36

  • Application of ZnO-Ag-Nd nanocomposite as a new synthesized nanophotocatalyst for degradation of the organic compounds: Kinetic, thermodynamic, and economic study

    摘要： In the present research, a zinc oxide (ZnO)–silver (Ag)–neodymium (Nd) nanocomposite was synthesized via the combustion method for the degradation of dyes as organic pollutants. The synthesized nanophotocatalyst was characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy techniques. The process of organic pollutant (Acid Red 18) removal was carried out in a semi-batch photoreactor equipped with an ultraviolet lamp. Also, the influence of key operational parameters such as pH, temperature, initial concentration of solution, and nanophotocatalyst dosage was investigated to evaluate kinetic and thermodynamic properties. Under optimum process conditions (pH ? 6.21, dosage of nanophotocatalyst ? 0.08 g/l, and low initial concentration of the solution), degradation of pollutant was monitored by measuring the total organic carbon of the solution. Finally, an economic study showed that the photocatalytic advanced oxidation process is an viable treatment method for low concentrations of organic pollutants.

    关键词： wastewater treatment,degradation,organic pollutant,Nanophotocatalyst

    更新于2025-09-10 09:29:36

  • Synthesis and characterization of Al-Fe-Cu tri-doped TiO <sub/>2</sub> by in-situ hydrothermal for degradation of methylene blue dyes

    摘要： Pure TiO2 and a series of Al-Fe-Cu tri-doped TiO2 were synthesized by using in-situ hydrothermal method. The synthesized materials were characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). The photocatalytic activity of the samples was evaluated for degradation of methylene blue (5mgL-1) in aqueous solution under uv-visible light (λ= <420 nm). The XRD pattern showed that all samples exhibited anatase phase after calcined at temperature 500°C with crystallite size in the range of 10.00-13.23 nm. The FTIR spectra showed three important vibrational modes for vOH, δOH and vTiO that were assigned at range 3411.75-3399.27 cm-1, 1626.91-1630.53 cm-1 and 503.30- 530.93 cm-1, respectively. The degradation rate of Al(1mmol)-Fe-Cu tri-doped TiO2 showed the highest photocatalytic degradation with 93% compared to pure TiO2, Al(2 mmol)-Fe-Cu tri-doped TiO2 and Al(3mmol)-Fe-Cu tri-doped TiO2 were calculated as 76%, 85% and 80%, respectively. Hence, it can be seen that, the amount of Al ion-doping have influence on the photocatalytic degradation.

    关键词： Al-Fe-Cu tri-doped TiO2,methylene blue,photocatalytic degradation,in-situ hydrothermal

    更新于2025-09-10 09:29:36

  • Insight into photocatalytic activity, universality and mechanism of copper/chlorine surface dual-doped graphitic carbon nitride for degrading various organic pollutants in water

    摘要： It is still a challenging work to realize the universality of photocatalytic materials for unselective removing various organic pollutants in water. Here a surface dual-doped Cu/Cl-g-C3N4 photocatalyst is firstly prepared, which exhibits much more superior photocatalytic performance for degrading multifarious persistent organic pollutants including tetracycline hydrochloride (TC-HCl), o-chlorophenol, bisphenol A and 2-mercaptobenzothiazole in water than pure g-C3N4. The high-efficiency and unselective photocatalytic degradation performance derives from the surface dual-doped effect of Cu/Cl elements on g-C3N4, which results in the extended visible light harvest range, elevated CB potential and improved the separation efficiency of charge carriers. The intermediate products, degradation pathway, degree of mineralization and reaction mechanism of representative TC-HCl pollutant over the surface dual-doped Cu/Cl-g-C3N4 photocatalyst are revealed in depth. This work makes an important development for treating the persistent organic pollutants in the water environments by exploiting new, low-cost and high-efficiency photocatalytic materials.

    关键词： reaction mechanism,photocatalytic degradation,dual-doped Cu/Cl-g-C3N4,various organic pollutants,universality

    更新于2025-09-10 09:29:36

  • Novel insights into the properties of AgBiO3 photocatalyst and its application in immobilized state for 4-Nitrophenol degradation and bacteria inactivation

    摘要： This study focuses on the synthesis of novel AgBiO3 nanoparticles by the hydrothermal route and investigating its properties responsible for waste water treatment. The temperature and time of hydrothermal reaction was optimized to 150°C and 24 h to obtain highly active crystalline nanoparticles, as determined by XRD. The oxidation state of each element in the material was determined from XPS analysis. The morphology and size of the nanoparticles was obtained from SEM and TEM analysis. The optical and electrochemical properties of the material were studied by UPS and Mott Schottky plot. AgBiO3 was found to have a low band gap that facilitates the absorption of higher wavelength range as confirmed by Tauc plots and UV-Vis DRS analysis. The excellent photocatalytic activity of the immobilized material towards the degradation of 4-nitrophenol and inactivation of E. coli was confirmed from kinetic studies and stability tests. A maximum degradation of 90% was achieved for 4-NP and a 5-log reduction was observed for viable E. coli cells in 5 h and 1 h respectively. Scavenger studies were performed to identify that superoxide radicals were responsible for the photocatalytic activity of the material. To eliminate the cost of separation and ease the reusability of the material, the nanoparticles were immobilized on cellulose acetate. Leaching of Ag and Bi ions from immobilized as well as free AgBiO3 nanoparticles into water was obtained via ICP-MS analysis. The results indicated that the leaching of Ag and Bi was controlled to a considerable extent due to immobilization on cellulose acetate matrix.

    关键词： bacteria inactivation,nanoparticle synthesis,nitrophenol degradation,immobilization

    更新于2025-09-10 09:29:36