Hollow CuFe2O4/α-Fe2O3 composite with ultrathin porous shell for acetone detection at ppb levels

Li, Xiaowei; Lu, Dongxiao; Shao, Changlu; Lu, Geyu; Liu, Yichun

doi:10.1016/j.snb.2017.11.131

Cited by 64 publications

(25 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be attributed to slower diffusion and reaction kinetics. It should be noted that these times are not only influenced by Pd loading and temperature but also by film morphology (sometimes called "utility ratio" [42]). In summary, choosing the "best" sensor strongly depends on the targeted application and is always a compromise.…”

Section: Sensingmentioning

confidence: 99%

Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

et al. 2021

View full text Add to dashboard Cite

Noble metal additives are widely used to improve the performance of metal oxide gas sensors, most prominently with palladium on tin oxide. Here, we photodeposit different quantities of Pd (0–3 mol%) onto nanostructured SnO2 and determine their effect on sensing acetone, a critical tracer of lipolysis by breath analysis. We focus on understanding the effect of operating temperature on acetone sensing performance (sensitivity and response/recovery times) and its relationship to catalytic oxidation of acetone through a packed bed of such Pd-loaded SnO2. The addition of Pd can either boost or deteriorate the sensing performance, depending on its loading and operating temperature. The sensor performance is optimal at Pd loadings of less than 0.2 mol% and operating temperatures of 200–262.5 °C, where acetone conversion is around 50%.

show abstract

Section: Sensingmentioning

confidence: 99%

Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Another important type of closed hollow heterojunction sensing material is metal oxide/metal oxide composition. [ 45–61 ] Wang and his coworker prepared ZnO/CdO hollow microspheres by the two‐step hydrothermal method. The hollow microsphere shows enhanced sensitivity toward 100 ppm ethanol at 250 °C, ≈16 times higher than that of pure ZnO ( Figure a,b).…”

Section: Gas Sensors Based On Closed Hollow Heterojunctionmentioning

confidence: 99%

Chemiresistive Gas Sensors Based on Hollow Heterojunction: A Review

Liu

Xiao

2021

Adv Materials Inter

View full text Add to dashboard Cite

Chemiresistive gas sensors are widely used in tens of thousands of applications, from health and safety to energy efficiency and emission control. Fabrication of highly effective sensing materials is of great significance for the practical applications in efficient gas detection. Among numerous sensing materials, semiconductor‐based sensing materials with hollow and heterojunction structures demonstrate distinct advantages such as high sensitivity, low operating temperature, and fast response/recovery. In this paper, the mechanism of gas sensing by chemiresistive sensors, as well as the mechanisms responsible for enhanced sensing performance in hollow structure and heterojunction are reviewed. Both single‐shelled and multi‐shelled hollow heterojunction materials applied in gas detection are presented. Then, the design and application of open hollow heterojunction in gas sensing are discussed. This review provides a deeper understanding of innovative works on the material design of high‐performance sensing materials for gas detection. It also summarizes the key technical challenges in material development and points out the perspectives for future studies on the next generating of chemiresistive gas sensing materials.

show abstract

“…Another example is the preparation of a complex hollow CuFe 2 O 4 /α-Fe 2 O 3 composite containing an ultrathin porous shell for the detection of acetone with a response as low as 100 ppm. It was suggested that the enhanced sensing performance could be attributed to hollow and porous architecture of CuFe 2 O 4 /α-Fe 2 O 3 , the resistance modulation effects of heterojunction as well as the catalytic properties of CuFe 2 O 4 [154]. Another interesting approach was the fabrication of a hollow Pt functionalized SnO 2 hemipill (HPN) network for the detection of acetone, which can be used as a biomarker for diabetes.…”

Section: Recent Advances In Complex Hollow Nanostructured Materials Fmentioning

confidence: 99%

The controlled synthesis of complex hollow nanostructures and prospective applications

et al. 2019

View full text Add to dashboard Cite

Functionality in nanoengineered materials has been usually explored on structural and chemical compositional aspects of matter that exist in such solid materials. It is well known that the absence of solid matter is also relevant and the existence of voids confined in the nanostructure of certain particles is no exception. Indeed, over the past decades, there has been great interest in exploring hollow nanostructured materials that besides the properties recognized in the dense particles also provide empty spaces, in the sense of condensed matter absence, as an additional functionality to be explored. As such, the chemical synthesis of hollow nanostructures has been driven not only for tailoring the size and shape of particles with well-defined chemical composition, but also to achieve control on the type of hollowness that characterize such materials. This review describes the state of the art on late developments concerning the chemical synthesis of hollow nanostructures, providing a number of examples of materials obtained by distinct strategies. It will be apparent by reading this progress report that the absence of solid matter determines the functionality of hollow nanomaterials for several technological applications.

show abstract

Hollow CuFe2O4/α-Fe2O3 composite with ultrathin porous shell for acetone detection at ppb levels

Cited by 64 publications

References 58 publications

Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

Chemiresistive Gas Sensors Based on Hollow Heterojunction: A Review

The controlled synthesis of complex hollow nanostructures and prospective applications

Contact Info

Product

Resources

About