Beilstein J. Nanotechnol.2022,13, 1316–1336, doi:10.3762/bjnano.13.109
offer. They include n–nheterojunctions, p–n heterojunctions, p–p heterojunctions, and Z-scheme-based heterojunctions (Figure 5b). By using heterojunctions, it is possible to exert control over the electronic components of the photocatalyst to increase light absorption and photoinduced separation and
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Figure 1:
Reported publications from 2011 to 2021 were searched on 6th June 2022 using the keyword “Bismuth-b...
Beilstein J. Nanotechnol.2017,8, 108–122, doi:10.3762/bjnano.8.12
to the adsorption of oxygen ions at the surface of nanomaterials.
Keywords: gas sensors; hydrogen; n–nheterojunctions; nanomaterials; TiO2/SnO2; Introduction
The TiO2–SnO2 system is extremely important for gas sensing as already proved by many works already published [1][2][3][4][5][6][7][8][9][10
in the cases of A) and D). The formation of n–n-type heterojunctions at the contact between SnO2 and TiO2 grains and its effect on the enhancement of the sensor response has been reviewed recently [14].
Figure 1 explains why the formation of n–nheterojunctions between TiO2 and SnO2 grains enhances
properties [21][22][23]. However, its application to nano-heterostructures for gas sensing is not known.
The aim of the current work is to study the role of nanocrystalline TiO2/SnO2 n–nheterojunctions for hydrogen sensing. Within this work the detailed study on crystallographic structure, morphology
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Figure 1:
Schematics illustrating the beneficial action of n–n heterojunctions for the sensitization of the g...