Flower-like NiO nanostructures synthesized by electrodeposition method for efficient detection of toluene gas

Yuan, Chao-xin; Li, Hairong; Xie, Long-zhen; Wang, Fang; Deng, Heng; Chang, Fangzhi; Sun, Ya‐Ping

doi:10.1039/c5ra18952g

Cited by 19 publications

(5 citation statements)

References 23 publications

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“…9). Our NiFe 2 O 4 -based sensor to toluene sensing is comparable to that of previous reports based on p-type sensing materials with unique morphologies and microstructures, as summarized in Table 1 [33][34][35][36][37][38][39][40].…”

Section: Gas-sensing Propertiessupporting

confidence: 83%

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

et al. 2020

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The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique materials. Here, hierarchical flower-like NiFe 2 O 4 with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH 4 F. The controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH 4 F. The flower-like NiFe 2 O 4 sensor exhibited outstanding sensitivity of 19.95 to 100 9 10 -6 toluene with low detection limit (1 9 10 -6 ). Furthermore, the sensor showed superior sensing selectivity and longterm stability to toluene. The excellent sensing properties could largely arise from a combination of high surface area, numerous active sites, porous structures, and the native catalytic characteristics of NiFe 2 O 4 to facilitate toluene molecules adsorption, diffusion, and reaction.

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Section: Gas-sensing Propertiessupporting

confidence: 83%

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

et al. 2020

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“…Coordination polymer precursors provide an easy route to multicomponent mixed metal oxides with high composition uniformity [69,70]. Electrodeposition has been reported as a method to prepare Ni flowers that can subsequently be oxidized to NiO [21,71]. ZnO nanoforests and TiO 2 nanowalls have been obtained by oxidation of corresponding metal films [72,73].…”

Section: Synthesis Of 2d Nanoflakesmentioning

confidence: 99%

2D metal oxide nanoflakes for sensing applications: Review and perspective

Dral

Elshof

2018

Sensors and Actuators B: Chemical

123

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In this review the state of the art and future prospects of 2-dimensional (2D) metal oxide nanoflakes used as active sensing elements for the detection of solutes, gases and radiation are discussed. 2D material geometries are particularly interesting for sensing applications because they provide large specific surface areas and are suitable for crystal facet engineering. In addition, unique material properties of atomically thin nanosheets due to quantum size effects provide engineering possibilities beyond the realm of their bulk counterparts. A variety of possibilities in materials, synthesis routes, (hierarchical) sensor architectures and application areas is sketched. The discussion is focused on high-performing sensors and innovative concepts. The scope is limited to nanoflakes with a thickness of up to 50 nm. Special attention is given to sensing based on material properties that are unique to atomically thin nanosheets.

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“…First, oxygen is adsorbed onto the surface of the porous nanosheet, which then reacts with electrons in the conduction band, giving rise to active oxygen species (O − , O 2− and O 2 − ). After exposure to the target gas, the toluene molecule will react with active oxygen species to produce benzaldehyde and H 2 O molecules, as illustrated by the above equations (Equations ( 6)-( 12)) [60,68]. The gas-sensing performance of this sensor is mainly ascribed to the following aspects.…”

Section: Resultsmentioning

confidence: 99%

Porous, Tremella-like NiFe2O4 with Ultrathin Nanosheets for ppb-Level Toluene Detection

Zhang

Cheng

et al. 2023

Crystals

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As a typical spinel ferrite, NiFe2O4 is suitable for use in gas sensors. Herein, we report the fabrication of porous, tremella-like NiFe2O4 assembled using porous, ultrathin nanosheets via the coordination of Ni2+ and Fe2+ with 1,4-phenylenediboronic acid. The optical band gap of the NiFe2O4 is estimated to be about 1.7 eV. Furthermore, the NiFe2O4 sensor annealed at 400 °C exhibits a low detection limit of 50 ppb, a fast response/recovery time (11.6 s/41.9 s to 10 ppm toluene), good reproducibility, and long-term stability at 220 °C. The suitable sensing performances can be attributed to the good catalytic activity of NiFe2O4 to toluene oxidation. Moreover, the ultrathin nanosheets with porous structures provide a large number of active sites to significantly favor the diffusion and adsorption/desorption of toluene molecules. This current work provides an insight into fabricating NiFe2O4 using 1,4-phenylenediboronic acid, which is promising for ppb-level toluene detection.

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Flower-like NiO nanostructures synthesized by electrodeposition method for efficient detection of toluene gas

Abstract: The technological process for the preparation of nickel oxide nanomaterials in this work.

Cited by 19 publications

References 23 publications

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

2D metal oxide nanoflakes for sensing applications: Review and perspective

Porous, Tremella-like NiFe2O4 with Ultrathin Nanosheets for ppb-Level Toluene Detection

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