H2S sensing material Pt-WO3 nanorods with excellent comprehensive performance

Yao, Xingyu; Zhao, Jinbo; Liu, Jiurong; Wang, Fenglong; Wu, Lili; Meng, Fanjun; Zhang, Dashun; Wang, Rutao; Ahmed, Jahangeer; Ojha, Kasinath

doi:10.1016/j.jallcom.2021.163398

Cited by 19 publications

(5 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, our SnO 2 –NiO nanopattern also shows among the best performance in terms of sensitivity, speed, and detection range when compared with WO 3 -based H 2 S sensor (Table S1). ,,− Finally, we performed the economic evaluation of top-down-based sensor at the commercial level, and it showed approximately $4.24/sensor in a 8 in. wafer-scale fabrication process (Supplementary Note 1).…”

Section: Resultsmentioning

confidence: 99%

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

et al. 2022

View full text Add to dashboard Cite

Metal oxide semiconductors (MOS) have proven to be most powerful sensing materials to detect hydrogen sulfide (H 2 S), achieving part per billion (ppb) level sensitivity and selectivity. However, there has not been a way of extending this approach to the top-down H 2 S sensor fabrication process, completely limiting their commercial-level productions. In this study, we developed a top-down lithographic process of a 10 nm-scale SnO 2 nanochannel for H 2 S sensor production. Due to high-resolution (15 nm thickness) and high aspect ratio (>20) structures, the nanochannel exhibited highly sensitive H 2 S detection performances (R a /R g = 116.62, τ res = 31 s at 0.5 ppm) with selectivity (R Hd 2 S /R acetone = 23 against 5 ppm acetone). In addition, we demonstrated that the nanochannel could be efficiently sensitized with the p−n heterojunction without any postmodification or an additional process during one-step lithography. As an example, we demonstrated that the H 2 S sensor performance can be drastically enhanced with the NiO nanoheterojunction (R a /R g = 166.2, τ res = 21 s at 0.5 ppm), showing the highest range of sensitivity demonstrated to date for state-of-the-art H 2 S sensors. These results in total constitute a high-throughput fabrication platform to commercialize the H 2 S sensor that can accelerate the development time and interface in real-life situations.

show abstract

Section: Resultsmentioning

confidence: 99%

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Pt-decorated WO 3 sensors are also utilized for effectively detecting H 2 S gas. Yao et al [ 112 ] synthesized Pt-decorated WO 3 nanorods hydrothermal and chemical reduction methods. The response of the 0.2 at% Pt-decorated WO 3 sensor was 1,638 towards 10 ppm H 2 S at 200 °C, with the short response/recovery time of 42/37 s, respectively.…”

Section: Single Noble Metal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

et al. 2023

View full text Add to dashboard Cite

Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring, exhaled breath diagnosis, and food freshness analysis. Among various chemiresistive sensing materials, noble metal-decorated semiconducting metal oxides (SMOs) have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble metals. This review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures (e.g., nanoparticles, nanowires, nanorods, nanosheets, nanoflowers, and microspheres) for high-performance gas sensors with higher response, faster response/recovery speed, lower operating temperature, and ultra-low detection limits. The key topics include Pt, Pd, Au, other noble metals (e.g., Ag, Ru, and Rh.), and bimetals-decorated SMOs containing ZnO, SnO2, WO3, other SMOs (e.g., In2O3, Fe2O3, and CuO), and heterostructured SMOs. In addition to conventional devices, the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed. Moreover, the relevant mechanisms for the sensing performance improvement caused by noble metal decoration, including the electronic sensitization effect and the chemical sensitization effect, have also been summarized in detail. Finally, major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.

show abstract

“…Recently, large quantities of studies are focused on gas sensors based on metal oxide semiconductors (MOS) or transition metal salts for their advantages of low cost, facile preparation, and high response. − Among them, owing to their immediately reaction, high response/selectivity, and low detection limit toward H 2 S, copper oxides (CuO, Cu 2 O, Cu x O) or salts have obtained great attention in the field of H 2 S detection, which can be attributed to the formation of a conductive copper sulfide (CuS) phase after H 2 S exposure. − However, owing to the formation of CuS that is relatively stable in an ambient environment at room temperature (RT), most of the reported copper oxide/salt-based H 2 S sensors unavoidably suffer from the poisoning effect, resulting in the irreversible recovery behavior. , To overcome this shortcoming, multiple strategies are implemented through a heat-assisted method during the recovery period, ,, nanosize p–n junction formation, , and UV radiation treatment, which are either synthesis-uncontrollable or energy-guzzling to restrict their implementation potential in sensor networks. Inspired by the facilitated corrosion of CuS under the moisture environment with acid/oxygen, designing copper salt sensing materials combined with other functional materials that can provide an acidic environment is another ideal and promising strategy for fabricating a recoverable, low-cost, and low-power consumption H 2 S sensor.…”

Section: Introductionmentioning

confidence: 99%

Designing Cu²⁺ as a Partial Substitution of Protons in Polyaniline Emeraldine Salt: Room-Temperature-Recoverable H₂S Sensing Properties and Mechanism Study

Liu

Duan

Yuan

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Hydrogen sulfide (H 2 S) sensors are in urgent demand in the field of hermetic environment detection and metabolic disease diagnosis. However, most of the reported roomtemperature (RT) H 2 S sensors based on transition metal oxides/ salts unavoidably suffer from the poisoning effect, resulting in the unrecoverable behavior to restrain their application. Herein, copper(II) chloride-doped polyaniline emeraldine salt (PANI-CuCl 2 ) was devised for RT-recoverable H 2 S detection, where the copper ion (Cu 2+ ) was designed as a partial substitution of protons (H + ) in PANI. The prepared gas sensor exhibited full recovery capability toward 0.25−10 ppm H 2 S, good repeatability, and longterm stability under 80% RH. Meanwhile, the changes of the PANI-CuCl 2 during the H 2 S sensing period were analyzed via multiple analytical methods to reveal the reversible sensing behavior. Results showed that doping of Cu 2+ not only promoted the PANI's response through the formation of conductive copper sulfide (CuS) and following H + redoping in the PANI but also facilitated the sensor's recovery behavior because of the Cu 2+ regeneration under the H + /oxygen environment. This work not only proves the changes of the interaction between the PANI and Cu 2+ during the H 2 S sensing period but also sheds light on designing recoverable H 2 S sensors based on transition metal salts.

show abstract

H2S sensing material Pt-WO3 nanorods with excellent comprehensive performance

Cited by 19 publications

References 62 publications

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Designing Cu²⁺ as a Partial Substitution of Protons in Polyaniline Emeraldine Salt: Room-Temperature-Recoverable H₂S Sensing Properties and Mechanism Study

Contact Info

Product

Resources

About

H2S sensing material Pt-WO3 nanorods with excellent comprehensive performance

Cited by 19 publications

References 62 publications

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H2S Detection

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H2S Detection

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Designing Cu2+ as a Partial Substitution of Protons in Polyaniline Emeraldine Salt: Room-Temperature-Recoverable H2S Sensing Properties and Mechanism Study

Contact Info

Product

Resources

About

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

Top-Down Approaches for 10 nm-Scale Nanochannel: Toward Exceptional H₂S Detection

Designing Cu²⁺ as a Partial Substitution of Protons in Polyaniline Emeraldine Salt: Room-Temperature-Recoverable H₂S Sensing Properties and Mechanism Study