Expanding Selectivity Functionality of a ZnO Nanotetrapod-Based Volatile Organic Compound Sensor Using Au Nanoparticle Decoration

Xu, F.; Lei, Wen; Sun, Shuhui; Zhong, Aihua; Cheng, Xiao‐Ning; Shi, Jidong; Li, Zeren; Li, Jia; Zhang, Wei; Wang, Xiaohu; Ma, Yanhui; Ho, Ho-Pui

doi:10.1021/acsanm.3c00576

Cited by 7 publications

(3 citation statements)

References 49 publications

(106 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, to improve the sensor response and selectivity towards the required gases, different approaches have been investigated. Surface modification with sensitizers like Au, CuO, NiO, PdO and Pt [4][5][6][7] is one of the most commonly employed method. Incorporation of sensitizers has been found to improve the response characteristics, which is attributed to the increase in the number of gas-specific selective sites for interaction with the target gas [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Electronic nose based on Pd- and Pt-incorporated ZnO nanowires: a case study

Sinju,

Khan,

Debnath

et al. 2024

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Effect of incorporation of sensitizers namely palladium (Pd) and platinum (Pt) on the gas-sensing behaviour of zinc oxide (ZnO) nanowires has been studied. The specificity achieved is further studied and demonstrated for its efficacy towards the simultaneous detection of multiple gases employing the developed sensors in an electronic nose configuration. Incorporation of salt solutions containing the desired sensitizer concentration in the starting reaction mixture of hydrothermal growth has been effectively used to achieve heterostructure ZnO nanowires. Pd and Pt gets incorporated as PdO and metallic Pt, in the host matrix resulting in the formation of random heterojunctions namely p–n junction and Schottky junctions. Consequently, an increase in the work function as studied using Kelvin probe studies is observed. Utilizing statistical implements namely principal component analysis (PCA) and hierarchical cluster analysis (HCA) the discrimination of three gases namely H2, H2S and NO2 has been successfully accomplished. 3D PCA discriminates the three gases successfully with first three components exhibiting a percentage of variance of 42.32, 33.26 and 24.20%, respectively. A reasonable discrimination of H2, H2S and NO2, grouped into three clusters as evident from HCA dendrograms, was achieved using utilizing Ward’s method and Euclidian distance metric approach.

show abstract

Section: Introductionmentioning

confidence: 99%

Electronic nose based on Pd- and Pt-incorporated ZnO nanowires: a case study

Sinju,

Khan,

Debnath

et al. 2024

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…Wencui Kang et al fabricated a nano-colorimetric sensor array consisting of nano-chemo responsive materials, which are used to quantify the volatile alcohols (VAs) in the kombucha tea extract fermentation process [3]. Au nanoparticles decorated ZnO nanotetrapod sensors with temperature-dependent selectivity were created by Fang Xu [4]. The sensor showed higher selectivity for formaldehyde at temperatures below 200 • C, ethanol at temperatures between 200 and 340 • C, and acetone at temperatures over 400 • C. Decorating TiO 2 gas sensors with Au nanoparticles improves sensor sensitivity by 40% according to Mostafa Shooshtari et al [5].…”

Section: Introductionmentioning

confidence: 99%

A DFT Study of Volatile Organic Compounds Detection on Pristine and Pt-Decorated SnS Monolayers

Wu,

Li,

Luo

et al. 2023

Sensors

View full text Add to dashboard Cite

Real-time monitoring of volatile organic compounds (VOCs) is crucial for both industrial production and daily life. However, the non-reactive nature of VOCs and their low concentrations pose a significant challenge for developing sensors. In this study, we investigated the adsorption behaviors of typical VOCs (C2H4, C2H6, and C6H6), on pristine and Pt-decorated SnS monolayers using density functional theory (DFT) calculations. Pristine SnS monolayers have limited charge transfer and long adsorption distances to VOC molecules, resulting in VOC insensitivity. The introduction of Pt atoms promotes charge transfer, creates new energy levels, and increases the overlap of the density of states, thereby enhancing electron excitation and improving gas sensitivity. Pt-decorated SnS monolayers exhibited high sensitivities of 241,921.7%, 35.7%, and 74.3% towards C2H4, C2H6, and C6H6, respectively. These values are 142,306.9, 23.8, and 82.6 times higher than those of pristine SnS monolayers, respectively. Moreover, the moderate adsorption energies of adsorbing C2H6 and C6H6 molecules ensure that Pt-decorated SnS monolayers possess good reversibility with a short recovery time at 298 K. When heated to 498 K, C2H4 molecules desorbs from the surface of Pt-decorated SnS monolayer in 162.33 s. Our results indicate that Pt-decorated SnS monolayers could be superior candidates for sensing VOCs with high selectivity, sensitivity, and reversibility.

show abstract

“…One well-known way to improve the sensing properties of SnO 2 is to add certain dopants, such as transition metals and noble metals [ 16 , 30 , 31 , 32 , 33 , 34 , 35 ]. Previous studies have demonstrated that an extrinsic doping/co-doping strategy has a significant influence on the sensing performance (e.g., sensitivity, selectivity, and working temperature) [ 16 , 17 , 30 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

The Role of Zn Ions in the Structural, Surface, and Gas-Sensing Properties of SnO2:Zn Nanocrystals Synthesized via a Microwave-Assisted Route

da Silva,

Lucchini,

Catto

et al. 2023

Sensors

View full text Add to dashboard Cite

Although semiconducting metal oxide (SMOx) nanoparticles (NPs) have attracted attention as sensing materials, the methodologies available to synthesize them with desirable properties are quite limited and/or often require relatively high energy consumption. Thus, we report herein the processing of Zn-doped SnO2 NPs via a microwave-assisted nonaqueous route at a relatively low temperature (160 °C) and with a short treatment time (20 min). In addition, the effects of adding Zn in the structural, electronic, and gas-sensing properties of SnO2 NPs were investigated. X-ray diffraction and high-resolution transmission electron microscopy analyses revealed the single-phase of rutile SnO2, with an average crystal size of 7 nm. X-ray absorption near edge spectroscopy measurements revealed the homogenous incorporation of Zn ions into the SnO2 network. Gas sensing tests showed that Zn-doped SnO2 NPs were highly sensitive to sub-ppm levels of NO2 gas at 150 °C, with good recovery and stability even under ambient moisture. We observed an increase in the response of the Zn-doped sample of up to 100 times compared to the pristine one. This enhancement in the gas-sensing performance was linked to the Zn ions that provided more surface oxygen defects acting as active sites for the NO2 adsorption on the sensing material.

show abstract

Expanding Selectivity Functionality of a ZnO Nanotetrapod-Based Volatile Organic Compound Sensor Using Au Nanoparticle Decoration

Cited by 7 publications

References 49 publications

Electronic nose based on Pd- and Pt-incorporated ZnO nanowires: a case study

Electronic nose based on Pd- and Pt-incorporated ZnO nanowires: a case study

A DFT Study of Volatile Organic Compounds Detection on Pristine and Pt-Decorated SnS Monolayers

The Role of Zn Ions in the Structural, Surface, and Gas-Sensing Properties of SnO2:Zn Nanocrystals Synthesized via a Microwave-Assisted Route

Contact Info

Product

Resources

About