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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） ▾

  • Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

    摘要： Mesoporous Fe2O3-supported ZSM-5 zeolites were prepared by carbon-templating and subsequently evaluated as photo-Fenton catalysts to degrade a dye used as a model heavy organic pollutant. The synthesis procedure of the mesoporous ZSM-5 zeolites was performed employing a nucleating gel and carbon particles as mesopores template. Thereafter, the precursor salt of the iron oxide (Fe2O3) was impregnated and then calcined to obtain the final catalyst. For comparison purposes, a conventional Fe2O3-supported ZSM-5 zeolite was also prepared. The results showed that the amount of intracrystalline mesopores formed in the ZSM-5 crystals was influenced by the amount of carbon added into the synthesis mixture. In comparison to the conventional prepared catalyst, the mesoporous Fe2O3/ZSM-5 ones showed an improved performance in the degradation of the target organic pollutant by the photo-Fenton reaction, which was attributed to the improvement of their textural properties as consequence of the mesopores generation.

    关键词： Fe2O3-supported ZSM-5,Mesoporous ZSM-5,carbon template,dye degradation,photo-Fenton reaction

    更新于2025-09-23 15:22:29

  • A unique (4,4,5)-connected 3D zinc (II) metal-organic framework for highly efficient photodegradation of Rhodamine B under UV light

    摘要： A new zinc (II) metal-organic framework, [Zn3(L)2(nbta)2]n (1) (L = 1,4-bis(benzimidazol-1-yl)-2-butene, H3nbta = 5-nitro-1,2,3-benzenetricarboxylic acid) was hydrothermally synthesized and structural characterized. 1 possesses a unique 3D (4,4,5)-connected network with a Schl?fla symbol of {42.63.8}2{44.62}{47.63}2. Furthermore, the photocatalytic property of 1 for degradation of the Rhodamine B (RhB) was examined under UV irradiation.

    关键词： Semi-rigid bis(benzimidazole),Hydrothermal synthesis,Crystal structure,Metal-organic framework,Zinc (II),Photocatalytic degradation

    更新于2025-09-23 15:22:29

  • Fabricating nano-sized BiVO <sub/>4</sub> /InVO <sub/>4</sub> /g-C <sub/>3</sub> N <sub/>4</sub> photocatalysts for efficient degradation of Acid Blue 92 azo dye

    摘要： BiVO4/InVO4 and BiVO4/InVO4/g-C3N4 were prepared by hydrothermal and ultrasonic-assisted hydrothermal methods respectively. All prepared samples were characterised by X-ray diffraction, scanning electron microscopy and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity of the prepared catalysts was determined by degradation of Acid Blue 92 (AB92) under visible light. The rate constant and efficiency of AB92 degradation over BiVO4/InVO4/g-C3N4 was higher than that over BiVO4/InVO4 which indicates better photocatalytic activity of BiVO4/InVO4/g-C3N4. This enhancement can be attributed to the suitable dispersion of BiVO4 and InVO4 particles on the g-C3N4 surface. Furthermore, the conduction band and valence band edge potentials of InVO4, BiVO4 and g-C3N4 extend the life-time of electron–hole pairs which is beneficial for the improvement of photocatalytic efficiency.

    关键词： ternary composites,photocatalysis,dye degradation,materials characterisation,g-C3N4,vanadates

    更新于2025-09-23 15:22:29

  • Modification of graphene oxide with titanium dioxide by alcoholic reduction

    摘要： Graphene oxide (GO) nanocomposites doped with DEGUSSA (P25) was synthetized by (GO) alcoholic reduction at high temperatures, during the reduction the P25 anchored to the spaces left by carbonyls groups in the graphene network, this incorporation improved photocatalytic behavior by retarding the electro-hole pair (e? hC). Raman spectroscopy con?rms the anchorage, because the material with higher load of TiO2 presented a band at 1100 cm?1 belonging to Carbonate’s groups (CO3) and a total modi?cation of the bands D and G, also this material presents a band gap of 2.54 eV. The P25 incorporation into graphene three-dimensional arrangement is notorious in diffraction x ray patterns, because the graphene diffraction pattern shows a sharpened and smaller peak than the starting graphene oxide. The incorporation of TiO2 to graphene sheets, improved the band gap, which P25 being of 3.2 eV was reduced to almost 2.5 eV, naturally this allows it, to be an excellent material to be used as photoanodes, photovoltaic devices and photocatalysis, its demonstrated by a photodegradation of methylene blue at 60 ppm exposed to solar light and 25 ppm exposed to a sodium lamp that emits radiation close to 589 nm.

    关键词： methylene blue degradation,Band gap,graphene oxide,titanium dioxide

    更新于2025-09-23 15:22:29

  • Analysis of Network Structures in Thiol-Ene UV Curing System Using Reworkable Resins

    摘要： An analysis of the network structures in thiol-ene UV curing resins was carried out using reworkable resins composed of di(meth)acrylate monomers having tertiary ester linkages. The effect of the functionality of the thiols, the functional ratio of the thiol and ene functions, their conversions and curing atmosphere on the chain lengths was discussed. A mixture of (meth)acrylates, thiol compounds, a photoradical initiator, and a photoacid generator was cured by irradiation at 365 nm. The cured samples were degraded by heating after irradiation at 254 nm. Size exclusion chromatography (SEC) and 1H NMR analyses of the degraded samples were carried out after the methylation. The crosslinking conditions strongly affected the network structures. The degraded samples have molecular weights between 250 and 2700. The molecular weights of the degraded resins increased with the functionality of the thiol compounds. The chain length dependence suggests that thiol compounds with a high functionality have a low reactivity due to steric hindrance. The chain lengths of the degraded networks were nearly proportional to the concentration of the (meth)acrylate monomers. The addition of reactive diluents enhanced the reactivity and increased the chain length.

    关键词： thiol-ene reaction,UV curing,crosslinking,chain length,degradation,reworkability

    更新于2025-09-23 15:22:29

  • [IEEE 2018 IEEE 7th International Conference on Photonics (ICP) - Kuah (2018.4.9-2018.4.11)] 2018 IEEE 7th International Conference on Photonics (ICP) - Passive Element Fault Analysis at the Last Mile of the FTTH Network in Malaysia

    摘要： The optical transceiver performance for GPON FTTH (OLTTx and ONURx) for 300 live subscribers at legacy area has been monitored hourly for a duration of four months. The optical performance is then plotted against its faults due to the passive element at the last mile of the GPON FTTH network. The results show that the fault rate for aerial type of fiber distribution (FDP) is higher (1.3%) than building, street cabinet and underground FDP types. More than 65% of the faults are contributed by optical fibers (drop fibers) and the rest is due to fiber connectors. The optical power received (ONURx) spectrum shows three types of patterns before disconnection; sudden disconnection, fluctuation and degradation of ONURx. This study provides preliminary information necessary for developing the passive element fault prediction for GPON FTTH at the last mile of the network.

    关键词： link loss,GPON FTTH network,optical transmit power: receive power,optical fiber,signals degradation,passive elements

    更新于2025-09-23 15:22:29

  • [IEEE 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) - Paris, France (2018.10.14-2018.10.17)] 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) - Calculation of Degradation Rates of Poly Crystalline Si and CIGS PV Module using Outdoor Linear Interpolation Method

    摘要： We propose the method to calculate the degradation rate of PV modules by outdoor linear interpolation method (LIM). Since the reference I-V curves which are based on measured I-V curves and used to LIM are created in each season, transitions of expected I-V curves indicate how PV modules degrade. The degradation rates of not only the maximum power but also the other parameters such as short circuit current and open circuit voltage can be calculated from the expected I-V curves. In this paper, the outdoor degradation rates of poly crystalline Si and CIGS were calculated. As a result, in poly crystalline Si case, the degradation rate of maximum power was calculated as -0.4 %/year due to short circuit current reduction. In CIGS case, although the initial power generation performance was better than the datasheet value, the annual degradation rate of the maximum power was calculated as -2.1 %/year. The reason of maximum power reduction was the reduction of both short-circuit current and open-circuit voltage.

    关键词： photovoltaic module,CIGS,poly crystalline silicon,degradation,linear interpolation method

    更新于2025-09-23 15:22:29

  • [IEEE 2018 2nd International Conference on Energy Conservation and Efficiency (ICECE) - Lahore, Pakistan (2018.10.16-2018.10.17)] 2018 2nd International Conference on Energy Conservation and Efficiency (ICECE) - Performance Analysis of First Grid Connected PV Power Plant in Subtropical Climate of Pakistan

    摘要： With the increasing penetration of both grid connected and standalone photovoltaic (PV) systems in Pakistan to cater the shortfall of energy, it is necessary to determine the performance and durability of already installed PV systems in different climates of country. This work aims to analyze the performance of first grid connected PV power plant located in Islamabad, Pakistan. The performance degradation of PV plants primarily depends on PV modules type (technology and design), regional climatic factors and field operating conditions. In this paper, performance ratio (PR) and degradation rate have been calculated from meteorological and performance data of plant to investigate the energy efficiency and modules quality over the course of operational years. Temperature losses due to module operating temperature were also estimated that primarily contribute to overall energy losses. This evaluation is of paramount importance for estimating the cost effect of the performance, identification of the underlying performance degradation and energy losses mechanisms, that help investors to choose climate specific modules technology and design for future plants and also to make efficient scheduling for preventive maintenance.

    关键词： Photovoltaic (PV) system,performance index (PI),energy losses,climatic factors,degradation rate analysis,performance ratio (PR)

    更新于2025-09-23 15:22:29

  • Mechanisms of adhesion degradation at the photovoltiac module's cell metallization-encapsulant interface

    摘要： Adhesion measurements and chemical characterization of the encapsulant/silver metallization interface of a photovoltaic (PV) module through temperature, humidity, and voltage bias exposures were conducted. Results demonstrate two independent degradation mechanisms: (a) with voltage bias, the ionic conduction of Na+ ions through the encapsulant results in the formation of sodium silicate at the silver metallization surface, thereby weakening that interface and (b) with moisture ingress, dissociation of the silane bonding to silver in the silver oxide similarly weakens this interface resulting in significantly lower debond energies.

    关键词： photovoltaic module,screen printing,reliability,encapsulation,degradation,metallization

    更新于2025-09-23 15:22:29

  • Fluorescence Study of the Hydrolytic Degradation Process of the Polysiloxane Coatings of Basalt Fibers

    摘要： Basalt fiber surfaces were modified using different silane aqueous solutions to generate a variety of polyorganosiloxane coatings. After removing the commercial coating of the fibers by calcination and subsequent activation processes, polysiloxanes were grafted on the fiber surfaces. Three aqueous solutions were used for the silanization: i) γ-aminopropyltriethoxysilane, APTES; ii) γ-aminopropylmethyldiethoxysilane, APDES, and iii) a mixture of 50% by weight of both APTES+APDES. The silanized fibers were chemically labeled with fluorescein isothiocyanate to be immersed afterwards in different aqueous solutions (pH=7) to study the hydrolytic degradation of the polysiloxane coatings. The hydrolysis phenomena were monitored by steady state fluorescence at different temperatures to subsequently study the kinetics of the process. The hydrolysis process was also studied by monitoring the pH of the solution in which the silanized fibers were immersed as a function of time. The data obtained from fluorimetry were fitted to an integrated expression arising from a first order kinetic process, which allowed estimation of the activation energies of the hydrolytic degradations. The results indicated that although the hydrolytic rate of the polysiloxane coatings increased in the order APDES<APDES+APTES<APTES, differences in the mechanism were not the cause of that order; the initial concentration of siloxane bonds able to be hydrolyzed was responsible.

    关键词： polyorganosiloxane,hydrolytic degradation,fluorescence,Basalt fibers

    更新于2025-09-23 15:22:29