Because of its excellent optical and electrical properties, SnS2 has been widely used in solar cells, photocatalysis, other fields. Here, a Fe-doped nanoflower with room temperature ferromagnetism was constructed to investigate the effect Fe doping an external magnetic field on photoelectric catalytic hydrogen production water splitting. Enhanced visible-light absorption conductivity were observed SnS2, thereby enhancing photoelectrocatalytic performance. Moreover, application leads negative...

The surface charges that accumulate on polypropylene (PP) film can induce electrical field distortion and flashover, which accelerate the aging of a capacitor. This paper investigated effect combined voltage charge behaviors flashover modification method to inhibit accumulation charge. carrier mobility in different conditions was calculated using potential decay process analyze transportation charges. Samples were fluorinated for 15, 30, 45 60 min unfluorinated samples prepared prior...

Abstract Currently, commonly used external insulation materials for power products lack operational stability compared to high-temperature vulcanized silicone rubber. The excellent hydrophobicity of PTFE provides a direction further enhancing By utilizing fluorinated occupation directional design technology and improving the dispersion degree dispersed phase, we have successfully prepared fluorine After testing its flammability other aspects, material achieved HC1-level hydrophobicity,...

The compound nitrous acid (HONO) acts as an essential precursor for the hydroxyl radical (·OH), exerting a notable impact on atmospheric oxidation chemistry. This study analyzed pollution characteristics of HONO and its main sources during severe air periods at different levels, including non-pollution period (Period I), haze Ⅱ), ozone Ⅲ) double high Ⅳ). elevation in nighttime levels was mainly attributed to transformation NO2 into through non-uniform reactions. heterogeneous reaction...

Polyimide film is widely used as the insulation material in high-temperature superconducting devices considering its excellent performance at low temperature. Irradiation will cause changes molecular chain structure of and affect charge behaviors. While operating, accumulation charges can accelerate partial discharge aging. In this paper, different doses high-energy electron beam irradiation were applied to polyimide films. Charge behaviors investigated room temperature liquid nitrogen....

Polypropylene (PP) film is extensively employed as the dielectric in capacitor because of its advantages low loss and high strength. Surface charge that accumulated on PP can cause electrical filed distortion induce surface flashover when under DC pulse voltage, which accelerate aging a capacitor. This paper investigated accumulation voltage modification method to inhibit charge. Samples were fluorinated for 15, 30, 45 60 min original samples prepared prior experiments. corona charged with...

Metallized film capacitors are the core equipment of converter stations and polypropylene (PP) films act as main insulation. The microstructure will be damaged in long-term operation under DC voltage eventually leads to insulation failures. In this paper, PP were prepared with different contents nucleating agent. micromorphology was observed crystallization properties investigated. breakdown experiments conducted average strength 0.01 wt.% agent is increased by approximately 25.7% compared...

The space charge accumulation in XLPE insulation is one of the most serious problems for HVDC cable application, which would distort electric field that finally leads to a fault. This work pretends study effect Graphene Oxide (GO) particles on LDPE/GO nanocomposites. nanocomposites with GO filler content 0, 0.001, 0.01 and 0.1 wt% were prepared by melt blending. DC conductivity, breakdown strength characteristic measured. Moreover, trap level distribution was tested IDC method. experiment...

In this paper, effects of ambient temperature and nanoparticles on surface charge discharge behavior epoxy/aluminum nitride (AlN) nanocomposites were investigated. With the rise temperature, strength epoxy resin decreases. The charges obtain more energy, their movement becomes violent makes it easier for secondary electron emission avalanche. 1, 3 5 wt% proportions AlN added to increase at different operation temperatures. filler content, trap level, density first then decrease $20...

The characteristics of surface charge and DC flashover voltage fluorinated polypropylene (PP) film at different temperatures were investigated in work. Corona charging potential decay (SPD) experiment conducted varying from 20 to 80 °C, with the relative humidity ~25%. was measured using a pair finger electrode. trap distribution calculated analyzed. Fluorination can effectively inhibit injection accumulation °C. Both shallow level (STL) deep (DTL) PP become shallow. elevated temperature...

Polypropylene (PP) has great potential to apply as insulation for extruded HVDC cables. This paper is intended explore the effect of radical scavenger on breakdown strength and space charge in PP/ ultralow density polyethylene (ULDPE) composite. With addition scavenger, PP/ULDPE composites increases accumulation reduces. The melting crystallization temperature, well electric conductivity, show a little change, energy level deep traps increases. It shown that PP/ULDPE/radical exhibit good...

Ferroelectric polymer P(VDF-TrFE-CFE) is widely employed as energy storage materials of dielectric capacitors, but the discharge density limited by lower breakdown strength, which restricts further development. The paper proposes a solution preparing composites based on bilayer structure and nanoparticles. Polyimide (PI) with high strength used bottom layer, BaTiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /Ferroelectric...

Polypropylene (PP) with excellent dielectric properties will make a further progress for its application in HVDC cables, if poor toughness can be improved. Besides, the space charge accumulation is still an important issue cable polymer insulation, which cause distortion of electric field, accelerate ageing insulation. In this paper, PP blended elastomer ultralow density polyethylene (ULDPE) content 15wt% by melt blending method to modify stiffness and brittleness. The graphene nanoplatelets...

In this paper, the voltage stabilizers that have excellent compatibility with XLPE are used to suppress space charge in insulation. Three different stabilizers, 4,4'-Difluorobenzophenone, 4,4'-Dihydroxybenzophenone, and 4,4'-Bis (dimethyl amino) benzyl, denoted as A, B, C, respectively, were added into material additive content of 0.5 wt%, neat was a control. The DC conductivity breakdown strength measurements employed characterize electrical properties samples. Moreover, behaviors...

Space charge and breakdown behavior are important factors in the design of high voltage dc (HVDC) cables. Since working temperature together with additives has a great influence on insulation performance composites, effect investigation would be highly beneficial. In this paper, space test polypropylene (PP) /ultralow density polyethylene (ULDPE) blends its radical scavenger modified composites performed at 30, 60 90 °C, respectively. The trap distribution investigated based Quantum...

In this paper, polycyclic compounds are employed to modulate the DC conductivity of polypropylene (PP) film improve working performance and safety power capacitors at high temperatures. Three kinds compounds, Benzoin, 4-Benzoylbiphenyl 4,4'- Bis (dimethyl amino) benzil, were dispersed into PP matrix by banbury mixer with filler content 0.05 wt%. The three- electrode system was used measure conduction current samples different temperature. density calculated. decreased after addition modified...