☆ 4.6 Review

Gas sensing performance of In2O3 nanostructures: A mini review

FRONTIERS IN CHEMISTRY (2023)

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Summary: The newly developed porous Au@Cr2O3-In2O3 nanorod sensor exhibits excellent detection ability for VOCs biomarkers, high selectivity, and long-term stability, making it a promising gas sensing material for breath VOCs gas detection in related diseases diagnosis.

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Summary: This study introduces oxygen vacancies and Pt clusters on the surface of In2O3 to reduce the optimal operating temperature of formaldehyde gas detection and improve its long-term stability. Experimental results confirm that the adsorbed water on the sensor surface is consumed via a chemical reaction between the oxygen vacancies and Pt clusters. Theoretical calculations reveal that the excellent performance of Pt/In2O3-x sensor is due to the electron enrichment from surface oxygen vacancies and the molecular adsorption and activation ability of Pt clusters. The developed sensor shows potential in ultraefficient, low-temperature, highly sensitive, and stable detection of indoor formaldehyde at room temperature.

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Miao Liu et al.

Summary: In this study, a facile method was used to prepare Au-In2O3/Ti(3)C(2)T(x )MXene composites, which exhibited significant sensitivity and excellent stability to formaldehyde at room temperature. The potential sensing mechanism of the composite sensor to formaldehyde was explored through density functional theory (DFT) simulations, providing an efficient tactic for the preparation of high-response formaldehyde-sensing materials for practical applications.

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Advances in In2O3-based materials for the development of hydrogen sulfide sensors

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Summary: The article reviews the potential of In2O3-based materials for sensing H2S gas, emphasizing their sensing performance and operational temperature conditions. It also discusses sensing mechanisms, synthesis procedures, and future prospects, while carefully evaluating the best option for In2O3-based sensing method based on their performance on a parallel basis.

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Summary: This study developed cost-effective and disposable smart sensors using solution-printed nano-composites for monitoring packaged foods' degradation. The addition of CuAc enhanced the sensors' detection capability for H2S gas at lower concentrations, and the modified sensors showed remarkable selectivity and anti-humid properties under high humidity conditions.

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Summary: The study demonstrated that the co-doping of NiO and PdO on In2O3 nanotubes is an effective way to improve hydrogen sensing characteristics, showing high response, selectivity, and fast response time. The fabricated hydrogen gas sensor has potential applications for the fast and accurate detection of hydrogen.

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Ultrahigh sensitivity and surface mechanism of gas sensing process in composite material of combining In2O3 with metal-organic frameworks derived Co3O4

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