Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

• Vishal Dutta,
• Ankush Chauhan,
• Ritesh Verma,
• C. Gopalkrishnan and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

• offer. They include n–n heterojunctions, 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

Nanocrystalline TiO₂/SnO₂ heterostructures for gas sensing

• Barbara Lyson-Sypien,
• Anna Kusior,
• Mieczylaw Rekas,
• Jan Zukrowski,
• Marta Gajewska,
• Katarzyna Michalow-Mauke,
• Thomas Graule,
• Marta Radecka and
• Katarzyna Zakrzewska

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–n heterojunctions; 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–n heterojunctions 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–n heterojunctions for hydrogen sensing. Within this work the detailed study on crystallographic structure, morphology