Room temperature gas sensors based on Ce doped TiO2 nanocrystals for highly sensitive NH3 detection

Wu, Kaidi; Debliquy, Marc; Zhang, Chao

doi:10.1016/j.cej.2022.136449

Cited by 93 publications

(40 citation statements)

References 51 publications

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“…In the same fashion, Wu et al investigated the influence of Ce doping percentage on the sensing properties of TiO 2 nanostructures. 75 BET analysis revealed an increase of the specific surface area and the pore volume with the increase of Ce doping concentration (from 0.17 to 0.43 at%). Consequently, TiO 2 nanocrystals doped with 0.43 mol % Ce displayed superior NH 3 sensing performance at room temperature, including high response (23.99 @ 20 ppm), and LOD of 140 ppb.…”

Section: Mechanismsmentioning

confidence: 97%

“…Bare ZnO showed a resistivity change of 45.5% to 400 ppm methylamine, whereas the Pd-decorated ZnO sensor exhibited a response of 99.5% under the same conditions. In the same fashion, Wu et al investigated the influence of Ce doping percentage on the sensing properties of TiO 2 nanostructures . BET analysis revealed an increase of the specific surface area and the pore volume with the increase of Ce doping concentration (from 0.17 to 0.43 at%).…”

Section: Amine Gas Sensorsmentioning

confidence: 99%

“…(iii) Response values of 0.43 at% Ce-TiO 2 gas sensor toward the NH 3 released from 25 g pangasius fillet during different stages (1, 6, 12, 18, 24 h). Reprinted with permission from ref . Copyright 2022 Elsevier.…”

Section: Amine Gas Sensorsmentioning

confidence: 99%

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Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

et al. 2022

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The increasing demand for food production has necessitated the development of sensitive and reliable methods of analysis, which allow for the optimization of storage and distribution while ensuring food safety. Methods to quantify and monitor volatile and biogenic amines are key to minimizing the waste of high-protein foods and to enable the safe consumption of fresh products. Novel materials and device designs have allowed the development of portable and reliable sensors that make use of different transduction methods for amine detection and food quality monitoring. Herein, we review the past decade’s advances in volatile amine sensors for food quality monitoring. First, the role of volatile and biogenic amines as a food-quality index is presented. Moreover, a comprehensive overview of the distinct amine gas sensors is provided according to the transduction method, operation strategies, and distinct materials (e.g., metal oxide semiconductors, conjugated polymers, carbon nanotubes, graphene and its derivatives, transition metal dichalcogenides, metal organic frameworks, MXenes, quantum dots, and dyes, among others) employed in each case. These include chemoresistive, fluorometric, colorimetric, and microgravimetric sensors. Emphasis is also given to sensor arrays that record the food quality fingerprints and wireless devices that operate as radiofrequency identification (RFID) tags. Finally, challenges and future opportunities on the development of new amine sensors are presented aiming to encourage further research and technological development of reliable, integrated, and remotely accessible devices for food-quality monitoring.

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Section: Mechanismsmentioning

confidence: 97%

Section: Amine Gas Sensorsmentioning

confidence: 99%

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Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

et al. 2022

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“…At the same time, the gas sensor material can be coated on flexible substrates with excellent performance at room temperature. Additionally, for the detection of ammonia gas, Kaidi Wu et al [ 26 ] were able to obtain the results by doping

, one of the rare-earth elements, into anatase

by using the microwave-assisted solvothermal method to generate nanocrystals, which achieved a response to the

gas at room temperature when the doping concentration of

reached

. The minimum detection concentration was

, whereas the response/recovery speed, selectivity, and operational stability were improved.…”

Section: Tio 2 Nanostructure-based Gas Sensorsmentioning

confidence: 99%

“…The need to detect atmospheric or environmental gases in most cases of practical use requires the gas sensor to be selective, which can severely limit the application of the device if it does not have the anti-interference performance against the detected unknown gases. As shown in Figure 2 b, the authors enumerate the selectivity of five different materials (red is

particles [ 24 ], orange is

-doped

quantum dots [ 25 ], light yellow is

-doped

nanocrystals [ 26 ], light blue is

nanoshells with anatase and rutile phases [ 27 ], and dark blue is

particles loaded on

fibers [ 28 ]) that were prepared by combining them with

for various gases, all of which are common but potentially more hazardous gases. As can be seen, each material responds to more than one gas to varying degrees, which can also be seen as a difference in the sensitivity of the gas-sensitive materials to different gases.…”

Section: Introductionmentioning

confidence: 99%

TiO2 Gas Sensors Combining Experimental and DFT Calculations: A Review

et al. 2022

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Gas sensors play an irreplaceable role in industry and life. Different types of gas sensors, including metal-oxide sensors, are developed for different scenarios. Titanium dioxide is widely used in dyes, photocatalysis, and other fields by virtue of its nontoxic and nonhazardous properties, and excellent performance. Additionally, researchers are continuously exploring applications in other fields, such as gas sensors and batteries. The preparation methods include deposition, magnetron sputtering, and electrostatic spinning. As researchers continue to study sensors with the help of modern computers, microcosm simulations have been implemented, opening up new possibilities for research. The combination of simulation and calculation will help us to better grasp the reaction mechanisms, improve the design of gas sensor materials, and better respond to different gas environments. In this paper, the experimental and computational aspects of are reviewed, and the future research directions are described.

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A Self‐Powered Portable Nanowire Array Gas Sensor for Dynamic NO₂ Monitoring at Room Temperature

Wei

Murugappan

et al. 2023

Advanced Materials

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The fast development of the Internet of Things (IoT) has driven an increasing consumer demand for self‐powered gas sensors for real‐time data collection and autonomous responses in industries such as environmental monitoring, workplace safety, smart cities, and personal healthcare. Despite intensive research and rapid progress in the field, most reported self‐powered devices, specifically NO2 sensors for air pollution monitoring, have limited sensitivity, selectivity, and scalability. Here, a novel photovoltaic self‐powered NO2 sensor is demonstrated based on axial p–i–n homojunction InP nanowire (NW) arrays, that overcome these limitations. The optimized innovative InP NW array device is designed by numerical simulation for insights into sensing mechanisms and performance enhancement. Without a power source, this InP NW sensor achieves an 84% sensing response to 1 ppm NO2 and records a limit of detection down to the sub‐ppb level, with little dependence on the incident light intensity, even under <5% of 1 sun illumination. Based on this great environmental fidelity, the sensor is integrated into a commercial microchip interface to evaluate its performance in the context of dynamic environmental monitoring of motor vehicle exhaust. The results show that compound semiconductor nanowires can form promising self‐powered sensing platforms suitable for future mega‐scale IoT systems.

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Room temperature gas sensors based on Ce doped TiO2 nanocrystals for highly sensitive NH3 detection

Cited by 93 publications

References 51 publications

Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

TiO2 Gas Sensors Combining Experimental and DFT Calculations: A Review

A Self‐Powered Portable Nanowire Array Gas Sensor for Dynamic NO₂ Monitoring at Room Temperature

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Room temperature gas sensors based on Ce doped TiO2 nanocrystals for highly sensitive NH3 detection

Cited by 93 publications

References 51 publications

Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

TiO2 Gas Sensors Combining Experimental and DFT Calculations: A Review

A Self‐Powered Portable Nanowire Array Gas Sensor for Dynamic NO2 Monitoring at Room Temperature

Contact Info

Product

Resources

About

A Self‐Powered Portable Nanowire Array Gas Sensor for Dynamic NO₂ Monitoring at Room Temperature