Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/58111
Title: Impact of sodium ion impregnation on the photocatalytic hydrogen evolution activities of anatase/rutile mixed phase TiO2 nanomaterials
Authors: P, Sruthy Raj
K R, Prathyusha
M R, Resmi
Parayil, Sreenivasan Koliyat
Keywords: Sol-Gel synthesis;Impregnation;Na+ modified TiO2;Photocatalysis;Water splitting
Issue Date: Sep-2021
Publisher: NIScPR-CSIR, India
Abstract: 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.
Page(s): 1159-1163
URI: http://nopr.niscair.res.in/handle/123456789/58111
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.60A(09) [September 2021]

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