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Highly Dispersed Pt-Incorporated Mesoporous Fe2O3 for Low-Level Sensing of Formaldehyde Gas.

ABSTRACT: Highly dispersed Pt-incorporated mesoporous Fe2O3 (Pt/m-Fe2O3) of 4 μm size is prepared through a simple hydrothermal reaction and thermal decomposition procedures. Furthermore, the formaldehyde gas-sensing properties of Pt/m-Fe2O3 are investigated. Compared with our previous mesoporous Fe2O3-based gas sensors, a gas sensor based on 0.2% Pt/m-Fe2O3 shows improved gas response by over 90% in detecting low-level formaldehyde gas at 50 ppb concentration, an enhanced selectivity of formaldehyde gas, and a lower degradation of sensing performance in high-humidity environments. Additionally, the gas sensor exhibits similar properties as the previous sensor, such as operating temperature (275 °C) and long-term stability. The enhancement in formaldehyde gas-sensing performance is attributed to the attractive catalytic chemical sensitization of highly dispersed Pt nanoparticles in the mesoporous Fe2O3 microcube architecture.

SUBMITTER: Jeon SJ 

PROVIDER: S-EPMC9960270 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Highly Dispersed Pt-Incorporated Mesoporous Fe<sub>2</sub>O<sub>3</sub> for Low-Level Sensing of Formaldehyde Gas.

Jeon Seung Jin SJ   Oh Kyung Hee KH   Choi Youngbo Y   Park Ji Chan JC   Park Hyung Ju HJ  

Nanomaterials (Basel, Switzerland) 20230208 4

Highly dispersed Pt-incorporated mesoporous Fe<sub>2</sub>O<sub>3</sub> (Pt/m-Fe<sub>2</sub>O<sub>3</sub>) of 4 μm size is prepared through a simple hydrothermal reaction and thermal decomposition procedures. Furthermore, the formaldehyde gas-sensing properties of Pt/m-Fe<sub>2</sub>O<sub>3</sub> are investigated. Compared with our previous mesoporous Fe<sub>2</sub>O<sub>3</sub>-based gas sensors, a gas sensor based on 0.2% Pt/m-Fe<sub>2</sub>O<sub>3</sub> shows improved gas response by over 90%  ...[more]

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