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Impact of sodium ion impregnation on the photocatalytic hydrogen evolution activities of anatase/rutile mixed phase TiO<sub>2</sub> nanomaterials

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Title Impact of sodium ion impregnation on the photocatalytic hydrogen evolution activities of anatase/rutile mixed phase TiO2 nanomaterials
 
Creator P, Sruthy Raj
K R, Prathyusha
M R, Resmi
Parayil, Sreenivasan Koliyat
 
Subject Sol-Gel synthesis
Impregnation
Na+ modified TiO2
Photocatalysis
Water splitting
 
Description 1159-1163
Sodium ion impregnated anatase/rutile mixed phase TiO2 material has been synthesised by sol-gel method and characterised for understanding the solar hydrogen production activities. The presence of sodium ion can influence the crystallinity, crystallite size and photocatalytic efficiency of mixed phase TiO2. The hydrogen evolution activities of the sodium impregnated TiO2 and bare TiO2 materials are compared by calculating the yield of H2 gas evolved from the dissociation of H2O. Even though the presence of rutile/anatase mixed phase TiO2 is suitable for hydrogen evolution under UV/visible light irradiation, it is found that bare TiO2 can act as a good catalyst and gives a hydrogen evolution value of 134 μmol after 5 h of irradiation from 20 mg of the catalyst. However, the sodium impregnated TiO2 material show lower hydrogen evolution as compared to bare TiO2 and a value of 34 μmol under similar experimental condition. The variation in hydrogen evolution may be exhibited due to high crystallinity, large crystallite size and higher percentage of the rutile phase in bare TiO2 compared to sodium impregnated TiO2 material. This study will be helpful for understanding the effect of alkali metal ion in metal oxide semiconductor and further understanding their detrimental effect on photocatalytic water splitting and related applications.
 
Date 2021-09-17T07:15:08Z
2021-09-17T07:15:08Z
2021-09
 
Type Article
 
Identifier 0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/58111
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJC-A Vol.60A(09) [September 2021]