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Enhanced effect of a plasma‐irradiated titanium substrate on the photocatalytic activity of a TiO 2 film
Author(s) -
Zhu WeiKun,
Kalathiparambil Kishor K.,
Sun ZhiGuang,
Liu ChenYang,
Zhu AiMin,
Ruzic David N.
Publication year - 2018
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201700223
Subject(s) - photocatalysis , photocurrent , anatase , irradiation , materials science , calcination , fluence , titanium , substrate (aquarium) , chemical vapor deposition , titanium dioxide , chemical engineering , photochemistry , nanotechnology , catalysis , chemistry , composite material , optoelectronics , physics , oceanography , nuclear physics , engineering , metallurgy , geology , biochemistry
To improve the photocatalytic activity of TiO 2 film, Ti substrates are irradiated by He ions with different incident ion energy, temperature, and fluence. Anatase TiO 2 films are then coated on the plasma‐irradiated substrates via chemical vapor deposition followed by calcination. Photocurrent tests and photocatalytic oxidation (PCO) of formaldehyde are used to assess photocatalytic performance. The optimal plasma‐irradiated samples showed a four times higher photocurrent and a three fold increase in the rate constant of the PCO reaction compared to the TiO 2 coated, untreated control sample. It is found that the enhanced photocatalytic activity and photocurrent are related to the changes of Ti crystal structure and surface morphology through plasma irradiation.