Journal ArticleDOI
Ag-Modified 3D Reduced Graphene Oxide Aerogel-Based Sensor with an Embedded Microheater for a Fast Response and High-Sensitive Detection of NO2
Qichao Li,Di Chen,Jianmin Miao,Shujing Lin,Zixian Yu,Yutong Han,Zhi Yang,Xiao Zhi,Daxiang Cui,Zhenghua An +9 more
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TLDR
A chemiresistive gas sensor based on three-dimensional Ag modified reduced graphene oxide (3D Ag-rGO) aerogel shows a remarkable fast response for 50 ppb NO2 and a low limit of detection (LOD) of 6.9 ppb, demonstrating a greatly improved selectivity toward NO2.Abstract:
A chemiresistive gas sensor based on a three-dimensional Ag-modified reduced graphene oxide (3D Ag-rGO) aerogel is reported. We improve the graphene-based sensor performance by optimization of operating temperature, chemical modification, and new design of the material geometrical structure. The self-assembly and Ag nanoparticle (NP) decoration of the Ag-rGO aerogel are realized by a facile, one-step hydrothermal method. An integrated low-power microheater fabricated on a micromachined SiO2 membrane is employed to enhance the performance of the sensor with a fast response to NO2 and a shortened recovery time. The 3D Ag-rGO-based sensor at a temperature of 133 °C exhibits the highest response. At the same time, the response to other gases is suppressed while the response of the Ag-rGO sensor toward ammonia at 133 °C is reduced to half of the value at room temperature, demonstrating a greatly improved selectivity toward NO2. Additionally, the sensor exhibits a remarkably fast response to 50 ppb NO2 and a low limit of detection of 6.9 ppb.read more
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Recent Progress of Nanostructured Sensing Materials from 0D to 3D: Overview of Structure–Property-Application Relationship for Gas Sensors
Tingting Zhou,Tong Zhang +1 more
TL;DR: Important advances for the outstanding, novel sensing materials with different dimensional structures including 0D, 1D, 2D, and 3D are reported and summarized systematically.
A 3D Chemically Modified Graphene Hydrogel for Fast, Highly Sensitive, and Selective Gas Sensor
Jin Wu,Kai Tao,Yuanyuan Guo,Zhong Li,Xiaotian Wang,Zhong-Zhen Luo,Shuanglong Feng,Chunlei Du,Di Chen,Jianmin Miao,Leslie K. Norford,Leslie K. Norford +11 more
TL;DR: In this paper, a chemiresistor-type sensor based on 3D sulfonated RGO hydrogel (S-RGOH) is reported, which can detect a variety of important gases with high sensitivity, boosted selectivity, fast response, and good reversibility.
Journal ArticleDOI
Highly sensitive sensor based on ordered porous ZnO nanosheets for ethanol detecting application
TL;DR: In this paper, the authors presented a high-performance gas sensor based on ordered porous ZnO (PZnO) nanosheets with a low cost, which can be attributed to the single-crystalline feature, more (002) facets exposure, ordered porous structure and a large amount of oxygen vacancy on the sensitive surface according to the sensing mechanism and density functional theory simulation.
Journal ArticleDOI
High-performance acetone gas sensor based on Pt–Zn2SnO4 hollow octahedra for diabetic diagnosis
TL;DR: In this paper, ultrafine Pt nanoparticles were prepared and used to decorate the surface of Zn2SnO4 (ZTO) hollow octahedra for enhanced acetone gas-sensing performance towards breath analysis.
References
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