Roles of UV light strength and auxiliary electric field in the photocatalytic degradation effect of organic contaminant

Abstract

The accumulation of contaminants on the electrical devices could adversely affect the operation. The present work used photocatalytic functional material to coat on the surface of the electrical devices to prevent the influence of organic contamination. This kind of material was mainly composed of TiO 2 that can remove the contamination by the effect of photooxidation. The photocatalysis was affected by the strength of UV light and electric field. In the experiment, methyl orange (MO) was used as the organic contaminant. The effect of UV light and auxiliary electric field were analysed based on the theoretical simulation. With the stronger UV light, more electron-hole pairs were generated, photocatalytic effect became more pronounced. With the auxiliary electric field, the recombination of electron and hole could be restrained that would increase the productive rate of hole; therefore, more hydroxyl radical will be produced to degrade MO.

Simulation calculation of 3D electric field and natural flashover analysis of ice‐covered silicone rubber insulator

“…Existing researches declare that the conductive ions dissolved in supercooled water droplets are gradually discharged from the ice interior to the ice surface during the phase transition [22, 23]. As a result, the conductivity of water film on the ice surface is much higher than that of ice during the melting process.…”

“…The research suggests that the relationship between the critical breakdown field strength ( E b ) of icicle air gap and the gap length ( d ) is shown in Equation (10) [23, 24]. $$$$\begin{equation}{E_b} = 3.96 + \frac{{7.49}}{d}\end{equation}$$$$…”

“…The influence of ice pallets on the electric field cannot be considered by a 2D model. In fact, previous researchers have done little research on 3D simulation [23, 24], and mainly due to the limitations of computer technology at that time. Therefore, the model construction is relatively rough, and the simulation of insulator icing model and electric field strength have obvious differences compared with the real situation.…”

Assessment of Mechanical and Optical Properties of Al 6060 Alloy Particles by Removal of Contaminants

“…[16] The highenergetic UV radiation that is released during plasma processes can contribute to the cleaning effect. [17][18][19] The chemical pretreatment of aluminum considers aspects of cleaning, the mechanical removal of oxide layers, as well as pickling of surface layers and intermetallic phases. [20,21] Acidic and alkaline pickling lead to different results for aluminum alloys with regard to the thicknesses as well as the compositions of the resulting oxide layer thicknesses.…”

Fluorinated SnO2/ER as an antistatic coating for enhancing the surface insulating strength of epoxy insulators

“…The flashover accident of the disk insulator can be the most severe one. [1][2][3][4] The GIL disk insulator is mainly made of epoxy resin composites doped with micro-Al 2 O 3 with a mass fraction of 60%, which has guaranteed the thermal, mechanical, and basic insulation requirements for the insulator. [5][6][7] However, the doping of Al 2 O 3 fillers has also reduced the surface insulation performance.…”