Conductometric ppb-level acetone gas sensor based on one-pot synthesized Au @Co3O4 core-shell nanoparticles

Lee, Ha Young; Bang, Jin Ho; Majhi, Sanjit Manohar; Mirzaei, Ali; Shin, Kihong; Yu, Dong; Oum, Wansik; Kang, Sukwoo; Lee, Min Lyul; Kim, Sang Sub; Kim, Hyoun Woo

doi:10.1016/j.snb.2022.131550

Cited by 65 publications

(17 citation statements)

References 62 publications

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“…1c–f show, the high-resolution TEM (HRTEM) images reveal a lattice fringe spacing of 0.24 nm corresponding to the (1 1 1) plane of Au, and the lattice fringe spacings of 0.47 and 0.23 nm correspond to the (1 1 1) and (3 1 1) plane of Co 3 O 4 in the Au@Co 3 O 4 core–shell, respectively. 28,29 Furthermore, many discontinuous lattice stripes and amorphous morphology were visible at the interface of Au nanoparticles and the Co 3 O 4 shell, proving the presence of many defects in the Co 3 O 4 shell (Fig. 1c–f).…”

Section: Resultsmentioning

confidence: 88%

Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

Wang

Wen

et al. 2022

Environ. Sci.: Nano

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Section: Resultsmentioning

confidence: 88%

Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

Wang

Wen

et al. 2022

Environ. Sci.: Nano

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“…As the humidity increases, the response value of the CsPbBr 3 gas sensor decreases. This may be due to the fact that water molecules occupied the adsorption site and gradually formed chemisorbed OH – on the surface of CsPbBr 3 , which hindered the adsorption of EA and cause the sensor response to decrease. , Additionally, the recovery time presents a remarkable increase as the humidity increases, though there is little difference in the response time. Since humidity has a great impact on the gas-sensing response, a waterproof encapsulation can be used in practical applications to reduce the impact of humidity on sensors.…”

Section: Resultsmentioning

confidence: 99%

CsPbBr₃-Based Nanostructures for Room-Temperature Sensing of Volatile Organic Compounds

Wang

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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All-inorganic halide perovskites, as a dominant member of the perovskite family, have been proven to be excellent semiconductors due to the great successes for solar cells, light-emitting diodes, photodetectors, and nanocrystal photocatalysts. Despite the remarkable advances in those fields, there are few research studies focusing on gas and humidity-sensing performances, especially for pure CsPbBr3 and heterogeneous CsPbBr3@MoS2 composites. Here, we first report a valuable CsPbBr3 sensor prepared by electrospinning, and the excellent gas sensing performances are investigated. The CsPbBr3 sensor can quickly and effectively detect ethanolamine at room temperature. The response time is only 16 s, and the response to 100 ppm ethanolamine is as high as 29.87, besides the excellent repeatability and good stability. The theoretical detection limit is estimated to be 21 ppb. Furthermore, considering the irreplaceable role of heterostructures in regulating the electronic structure and supporting rich reaction boundaries, we also actively explored the EA sensitivity of inorganic CsPbBr3-based heterogeneous composites CsPbBr3@MoS2. At the same time, the roles of the critical capping agents OA and OAm are systematically investigated. This work demonstrates the great potential of all-inorganic halide perovskites in promising volatile organic compound detection.

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“…19 Yu et al synthesized Au@Co 3 O 4 yolkshell nanoparticles, which exhibited a significant response of 27.05 when exposed to 10 ppm acetone at a temperature of 250 °C. 20 Modification of the sensing material by using metals or other metal oxides is an effective method to change the carrier state at the interface. The commonly used noble metals, including Ag, 21 Au, 22 Pd, 23 Pt, 24 and Rh 25 could serve as sensitizers and promoters.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Liu et al prepared 3D MXene/rGO/CuO aerogel, and the response value was 52.09% toward 100 ppm acetone at ambient temperature . Yu et al synthesized Au@Co 3 O 4 yolk-shell nanoparticles, which exhibited a significant response of 27.05 when exposed to 10 ppm acetone at a temperature of 250 °C . Modification of the sensing material by using metals or other metal oxides is an effective method to change the carrier state at the interface.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Acetone-Sensing Properties of Pt-Decorated In₂O₃ Hollow Microspheres Derived from Pt-Embedded Template

et al. 2023

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Pt-decorated In 2 O 3 hollow microspheres were prepared using a template and reflux method. The size of the prepared carbon templates was adjusted from 200 nm to 1.3 μm by introducing chloroplatinic acid during the hydrothermal process. At the same time, Pt nanoparticles inside the carbon layer were protected from oxidation and agglomeration. Also, the folds created on the surface of the hollow sphere during shrinkage led to a substantial increase in specific surface area. The response of the In 2 O 3 -based sensor toward acetone was significantly enhanced by the addition of Pt decoration. This improvement can be attributed to the increased availability of active sites for the target gas and the consequential alteration of the energy band structure. In addition, high response sensitivity, rapid dynamic processes, long-term reliability, and selectivity have all been achieved. The detectable limit is less than 1 ppm, which might satisfy the 1.8 ppm threshold value in the exhaled breath of patients with diabetes. Consequently, the proposed sensor has great sensitivity and can detect lowconcentration of acetone, making it an ideal choice for applications such as monitoring daily dietary intake, managing diabetes, and inspecting industrial production processes.

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Conductometric ppb-level acetone gas sensor based on one-pot synthesized Au @Co3O4 core-shell nanoparticles

Cited by 65 publications

References 62 publications

Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

CsPbBr₃-Based Nanostructures for Room-Temperature Sensing of Volatile Organic Compounds

Enhanced Acetone-Sensing Properties of Pt-Decorated In₂O₃ Hollow Microspheres Derived from Pt-Embedded Template

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Conductometric ppb-level acetone gas sensor based on one-pot synthesized Au @Co3O4 core-shell nanoparticles

Cited by 65 publications

References 62 publications

Catalytic oxidation of formaldehyde over a Au@Co3O4 nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

Catalytic oxidation of formaldehyde over a Au@Co3O4 nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

CsPbBr3-Based Nanostructures for Room-Temperature Sensing of Volatile Organic Compounds

Enhanced Acetone-Sensing Properties of Pt-Decorated In2O3 Hollow Microspheres Derived from Pt-Embedded Template

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Product

Resources

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Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

Catalytic oxidation of formaldehyde over a Au@Co₃O₄ nanocomposite catalyst enhanced by visible light: moisture indispensability and reaction mechanism

CsPbBr₃-Based Nanostructures for Room-Temperature Sensing of Volatile Organic Compounds

Enhanced Acetone-Sensing Properties of Pt-Decorated In₂O₃ Hollow Microspheres Derived from Pt-Embedded Template