“…Besides bulk doped materials, heterostructures of ZnO with M(III) oxides are often obtained. The nanocomposites ZnO/In 2 O 3 have been synthesized with different morphologies and in a wide composition range for the use as gas sensors (Rambu et al, 2011;Singh et al, 2011;Lee et al, 2013Lee et al, , 2017Trakhtenberga et al, 2013;Ma et al, 2016;Espid and Taghipour, 2017;Ilin et al, 2017;Wang et al, 2017;Wei et al, 2017;Zou et al, 2017;Choo et al, 2018;Guo et al, 2018;Liu et al, 2018), humidity sensors (Liang et al, 2012), photocatalysts (Wei et al, 2017;Markova et al, 2018), UV-light detectors (Wang et al, 2009). The studies of gas sensor behavior suggested the increased gas sensitivity of composites, in comparison to pure oxides.…”