Investigating the influence of Ni doping on the CuO thin films deposited via ultrasonic spray pyrolysis: Structural, optical and H2 gas sensing analyses

Güldüren, Muhammed Emin; İskenderoğlu, Demet; Güney, Harun; Gür, Emre; Acar, Merve; Karadeniz, Sibel Morkoç

doi:10.1016/j.ijhydene.2022.09.283

Cited by 11 publications

(2 citation statements)

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“…Patil et al [ 8 ] synthesized In 2 O 3 nanoparticle assemblies as nano-cubes via a simple hydrothermal method, achieving a response of 10 for 3 ppm NO 2 at 50 °C with a response time of 21 s, a recovery time of 8.7 min, and a detection limit of 60 ppb. In recent years, p-type CuO gas-sensitive materials have been increasingly utilized in gas sensors due to their excellent chemical stability and catalytic activity [ 9 ] and have been widely applied for detecting reducing gases such as ethanol [ 10 ], hydrogen [ 11 ], and carbon monoxide [ 12 ]. However, research on oxidizing gases such as NO 2 remains scarce.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Lv et al [6] used willow catkins as a biomass template to obtain thin ZnO nanorods via immersion and calcination treatment, achieving a response of 100.4 for 10 ppm NO 2 at 92 • C. Similarly, Gajanan et al [7] prepared WO 3 nanosheets via a hydrothermal 2 of 15 method, achieving a response of 2.25 for 100 ppm NO 2 at 200 • C. Patil et al [8] synthesized In 2 O 3 nanoparticle assemblies as nano-cubes via a simple hydrothermal method, achieving a response of 10 for 3 ppm NO 2 at 50 • C with a response time of 21 s, a recovery time of 8.7 min, and a detection limit of 60 ppb. In recent years, p-type CuO gas-sensitive materials have been increasingly utilized in gas sensors due to their excellent chemical stability and catalytic activity [9] and have been widely applied for detecting reducing gases such as ethanol [10], hydrogen [11], and carbon monoxide [12]. However, research on oxidizing gases such as NO 2 remains scarce.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Different Pt Functionalization Modes on the Properties of CuO Gas-Sensing Materials

Chen,

Liu,

Ouyang

et al. 2023

Sensors

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The functionalization of noble metals is an effective approach to lowering the sensing temperature and improving the sensitivity of metal oxide semiconductor (MOS)-based gas sensors. However, there is a dearth of comparative analyses regarding the differences in sensitization mechanisms between the two functionalization modes of noble metal loading and doping. In this investigation, we synthesized Pt-doped CuO gas-sensing materials using a one-pot hydrothermal method. And for Pt-loaded CuO, Pt was deposited on the synthesized pristine CuO surface by using a dipping method. We found that both functionalization methods can considerably enhance the response and selectivity of CuO toward NO2 at low temperatures. However, we observed that CuO with Pt loading had superior sensing performance at 25 °C, while CuO with Pt doping showed more substantial response changes with an increase in the operating temperature. This is mainly due to the different dominant roles of electron sensitization and chemical sensitization resulting from the different forms of Pt present in different functionalization modes. For Pt doping, electron sensitization is stronger, and for Pt loading, chemical sensitization is stronger. The results of this study present innovative ideas for understanding the optimization of noble metal functionalization for the gas-sensing performance of metal oxide semiconductors.

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