Electron Beam Irradiation Effect on the Photocatalytic Activity of TiO2 on Carbon Nanofibers

2011 ◽  
Vol 11 (2) ◽  
pp. 1438-1442 ◽  
Author(s):  
Bo-Hye Kim ◽  
Chang Hyo Kim ◽  
Kap Seung Yang ◽  
Byung Cheol Lee ◽  
Hee-Gweon Woo
Keyword(s):  
Photocatalytic Activity ◽  
Electron Beam ◽  
Carbon Nanofibers ◽  
Electron Beam Irradiation ◽  
Irradiation Effect ◽  
Beam Irradiation

scholarly journals Low-energy electron beam irradiation effect on Al/SiO2/Si structure voltage-farad characteristics

2019 ◽  
Vol 22 (2) ◽  
pp. 112-117
Author(s):  
Yu. O. Kulanchikov ◽  
P. S. Vergeles ◽  
E. B. Yakimov
Keyword(s):  
Electron Beam ◽  
Carrier Transport ◽  
Electron Beam Irradiation ◽  
Irradiation Effect ◽  
Beam Irradiation ◽  
Dielectric Thickness ◽  
Mos Structure ◽  
Trap Formation ◽  
Positive Voltage ◽  
Low Energy Electron

The effect of electron irradiation with energy of 2.5 keV on the MOS structure Al/SiO2/Si capacitance-voltage (C-V) characteristics have been studied. At chosen beam energy the electron penetration depth is lower than the dielectric thickness that allows to reveal the contribution of excess carrier transport to the trap formation on the SiO2/Si interface. It was established that the electron beam irradiation leads to a significant change in the C-V characteristics slope, i.e. to to the trap formation at the interface. A study of effect of bias applied to the investigated structure before and during the electron beam irradiation was carried out. It was established that while the bias applied before irradiation practically did not affect the C-V characteristics of the investigated MOS structure, the positive voltage applied to metallization during irradiation produced a pronounced effect on the C-V curve changes. At the same time the C-V characteristics after irradiation with zero and negative voltage were very similar. The investigation of stability of changes produced by the electron beam irradiation showed that the C-V curves are slowly restored even at room temperature. An applied negative bias was found to slow down the charge relaxation process.

Electron beam irradiation treatment of Ag/Bi2WO6/CdWO4 heterogeneous material with enhanced photocatalytic activity

2019 ◽  
Vol 43 (35) ◽  
pp. 13764-13774 ◽  
Author(s):  
Renrui Sun ◽  
Jing Wang ◽  
Tianli Yang ◽  
Ren He ◽  
Kehui Xue ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electron Beam ◽  
Organic Pollutants ◽  
Electron Beam Irradiation ◽  
Heterogeneous Material ◽  
Beam Irradiation ◽  
Highly Efficient ◽  
Irradiation Treatment ◽  
Inorganic And Organic

Ag/Bi2WO6/CdWO4 ternary heterostructure materials treated by electron beam irradiation are used for the highly efficient degradation of inorganic and organic pollutants.

The Effects of Electron Beam Irradiation on Structural and Optical Properties of TiO2 Particles

2017 ◽  
Vol 888 ◽  
pp. 297-303 ◽  
Author(s):  
Cik Rohaida Che Hak ◽  
Siti Salwa Zainal Abidin ◽  
Nur Ubaidah Saidin ◽  
Siti Aishah Ahmad Fuzi ◽  
Yusof Abdullah ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Low Dose ◽  
Beam Irradiation ◽  
Structural And Optical Properties ◽  
Dose Irradiation ◽  
Indirect Band Gap

The effect of electron irradiation on structural and optical properties of TiO2 particles has been studied. The crystallinity change was observed at low dose irradiation (4-20 kGy) while phase transformation from pure anatase to mixture of anatase-rutile was inevitable after 100 kGy without significant change in crystallinity. The highest fraction of rutile:anatase ratio was 20:80 obtained at 700 kGy. Morphology study demonstrated that TiO2 particles were spherical, nano-sized and heavily agglomerated with no obvious microstructural changes were observed after irradiation. The direct and indirect band gap (Eg) showed a decrement at low dose but re-increased after irradiation at >100 kGy. The highest Eg was at 700 kGy which can be explained by the changes of TiO2 atomic structure in the presence of mixture anatase:rutile. Therefore, the electron beam irradiation does affect both structural and optical properties of TiO2 nanoparticles. This is expected to affect the photocatalytic activity of TiO2.

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