Polyaniline@SnO2 heterojunction loading on flexible PET thin film for detection of NH3 at room temperature

Bai, Shouli; Tian, Yajun; Cui, Meng; Sun, Jianhua; Tian, Ye; Luo, Ruixian; Li, Dianqing

doi:10.1016/j.snb.2015.12.007

Cited by 131 publications

(50 citation statements)

References 36 publications

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“…The sensing performance of samples to the targeted NO 2 and NH 3 were investigated and the results are shown in Figure 4. Overall, the response curves of p-PANI/CNT, p-PANI and MWCNTs are upward and downward for oxidized NO 2 and reductive NH 3 , respectively, showing the p-type sensing characteristics (Figure 4a-f) [25][26][27]. On the contrary, both n-PANI and n-PANI/CNT exhibit the n-type sensing characteristics, which are downward and upward for NO 2 and NH 3 , respectively.…”

Section: Gas-sensing Performance Of Pani/cnts Composite Fibersmentioning

confidence: 95%

“…When p-PANI is transformed into n-type semiconductors, the local p-n heterojunctions form at the interface between n-type PANI and p-type MWCNTs. Thus, the electrons in n-type PANI combine with the holes in p-type MWCNTs at the local p-n heterojunctions, resulting in the lower carrier concentration of n-PANI/CNT [25][26][27]. In addition, the band gaps of samples have been roughly estimated according to the plot in Figure S5, which is obtained via the transformation based on the UV-vis spectra.…”

Section: Preparation Of Hierarchical Pani/cnt Composite Fibersmentioning

confidence: 99%

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High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering

Zhang

Cao

et al. 2019

Sensors

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Inspired by the enhanced gas-sensing performance by the one-dimensional hierarchical structure, one-dimensional hierarchical polyaniline/multi-walled carbon nanotubes (PANI/CNT) fibers were prepared. Interestingly, the simple heating changed the sensing characteristics of PANI from p-type to n-type and n-type PANI and p-type CNTs form p–n hetero junctions at the core–shell interface of hierarchical PANI/CNT composites. The p-type PANI/CNT (p-PANI/CNT) and n-type PANI/CNT (n-PANI/CNT) performed the higher sensitivity to NO2 and NH3, respectively. The response times of p-PANI/CNT and n-PANI/CNT to 50 ppm of NO2 and NH3 are only 5.2 and 1.8 s, respectively, showing the real-time response. The estimated limit of detection for NO2 and NH3 is as low as to 16.7 and 6.4 ppb, respectively. After three months, the responses of p-PANI/CNT and n-PANI/CNT decreased by 19.1% and 11.3%, respectively. It was found that one-dimensional hierarchical structures and the deeper charge depletion layer enhanced by structural changes of PANI contributed to the sensitive and fast responses to NH3 and NO2. The formation process of the hierarchical PANI/CNT fibers, p–n transition, and the enhanced gas-sensing performance were systematically analyzed. This work also predicts the development prospects of cost-effective, high-performance PANI/CNT-based sensors.

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Section: Gas-sensing Performance Of Pani/cnts Composite Fibersmentioning

confidence: 95%

Section: Preparation Of Hierarchical Pani/cnt Composite Fibersmentioning

confidence: 99%

High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering

Zhang

Cao

et al. 2019

Sensors

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“…As exposed previously, for breath analysis, there is also a high demand for ammonia sensors working at room temperature. Among the current studies, it can be mentioned the sensors using tungsten disulfide (WS2) [28] or carbon nanotubes (CNTs) [29] as sensing material, and especially the ones based on reduced grapheme oxide (RGO) [30][31][32], or on polyaniline (PANI) [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Ambient temperature selective ammonia gas sensor based on SnO2-APTES modifications

Hijazi

Rieu

Stambouli

et al. 2018

Sensors and Actuators B: Chemical

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“…For example, Liu et al [46] reported that PbS quantum dots/TiO2 nanotubes arrays showed a gas response of 17.49 for 100 ppm ammonia gas with a detection limit of 2 ppm at room temperature. Li et al [47] reported that polyaniline/SnO2 heterojunction had good selectivity to NH3 gas at room temperature of 21 o C, and its detection limit was 1.8 ppm. However, the detection limits of these NH3 gas sensors was above 1 ppm.…”

mentioning

confidence: 99%

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Wang

Zhang

et al. 2018

Sensors and Actuators B: Chemical

152

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Polyaniline@SnO2 heterojunction loading on flexible PET thin film for detection of NH3 at room temperature

Cited by 131 publications

References 36 publications

High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering

High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering

Ambient temperature selective ammonia gas sensor based on SnO2-APTES modifications

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

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