Facile h-MoO3 synthesis for NH3 gas sensing application at moderate operating temperature

Kumar, Surendra; Singh, Ankit; Singh, Rashmi; Singh, Sanjai; Kumar, Pramod; Kumar, Rachana

doi:10.1016/j.snb.2020.128974

Cited by 56 publications

(21 citation statements)

References 65 publications

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“…The XRD patterns of MoO3 were further investigated under the different conditions of pH, stirring rate and reaction temperature. As shown in Figure 3 210), (300), (310), and (410) crystal planes of h-MoO3, which are consistent with the standard spectrum (JCPDF:21-0569), and these peaks were in accordance with the previously reported hexagonal crystal h-MoO3 [17]. The results also suggested that the sample was MoO3 nanorod, with no other impurities.…”

Section: Optimization Of Moo3 Synthesis: Xrd Characterizationsupporting

confidence: 89%

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

et al. 2021

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In this study, we prepared a novel coating composed of hexagonal molybdenum oxide (h-MoO3) nanofiller and waterborne epoxy resin (WEP) to provide corrosion protection. We optimized the h-MoO3 nanorod synthesis methodology first by changing different parameters (pH, temperature, etc.). Furthermore, the as-prepared h-MoO3 rods were characterized using a scanning electron microscope (SEM) and X-ray diffraction (XRD). Finally, the electrochemical impedance spectroscopy (EIS) test results verified that the anticorrosive performance of the composite coatings was improved by incorporation of low content of MoO3 nanofiller (0.5 wt.%) compared to pure WEP sample. This developed composite will provide a new insight for the design and fabrication of one-dimensional (1D) nanomaterial (e.g., nanorod) reinforced epoxy coating and other polymeric coating processes.

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Section: Optimization Of Moo3 Synthesis: Xrd Characterizationsupporting

confidence: 89%

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

et al. 2021

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“…It is revealed that the responses of sensors toward NO 2 , acetone, ethanol, methanol, toluene, trimethylamine and NH 3 are 2.5%, 2.3%, 1.5%, 3%, 3.5%, 3% and 98% respectively, which indicate that the sensors exhibit good selectivity to NH 3 gas. Table 1 shows the comparison between the present work and previously reports on gas sensing properties for NH 3 detection [51][52][53][54][55][56]. Compared with other gas sensing materials, the rGO/Cu 2 O nanocomposites exhibit high response and rapid response/recovery rate [52,57].…”

Section: Gas Sensing Properties Of the Rgo/ Cu 2 O Nanocompositesmentioning

confidence: 74%

Ultra-low concentration detection of NH3 using rGO/Cu2O nanocomposites at low temperature

Sima

Song

et al. 2021

J Mater Sci: Mater Electron

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It has been a major challenge to develop a gas sensor capable of detecting ppblevel ammonia (NH 3 ) with high response at low temperature. Herein, Cu 2 O nanoblocks uniformly dispersed on wrinkle structure of reduced graphene oxide (rGO)-based nanocomposites synthesized via a water bath heating method. Characterizations results illustrate that Cu 2 O nanoblocks are evenly dispersed on the surface of rGO. Additionally, The gas sensing experiments displayed that the as-obtained rGO/Cu 2 O nanocomposites exhibited the extremely fast response (1s) and recovery time (1s), high-performance gas sensing property for ultra-low concentration (5 ppb) NH 3 detections at low temperature (80 °C), which owe to the mesoporous structure, excellent charge carriers transport properties and large specific surface area. Meanwhile, the probable enhancing mechanism of rGO/Cu 2 O nanocomposites was discussed as well. Therefore, it is expected that rGO/Cu 2 O nanocomposites with remarkable sensing performance for the future development in monitoring and detecting NH 3 at low temperature.

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“…The performance comparison among recently reported NH 3 sensors based on WS 2 or MoO 3 nanomaterials ,,,,,− was displayed in Table . To improve NH 3 -sensing performance, most studies were focusing on constructing heterojunctions or tailoring morphology.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous WS₂/MoO₃ Hybrids for High-Performance Trace Ammonia Detection

Niu

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Mesoporous WS 2 /MoO 3 hybrids were synthesized by a facile two-step and additive-free hydrothermal approach and employed for high-performance trace ammonia gas (NH 3 ) detection. Compared with single WS 2 and MoO 3 counterparts, WS 2 /MoO 3 sensors exhibited an improvement in NH 3 -sensing performance at room temperature (22 ± 3 °C). Typically, the optimal WS 2 /MoO 3 sensor showed a higher and quicker response of 31.58% within 57 s toward 3 ppm of NH 3 , which was 17.7-and 57.4-fold larger than that of pure MoO 3 (1.78% within 251 s) and WS 2 (0.55% within 153 s) ones. Meanwhile, good reversibility, sensitivity, and selectivity, reliable long-term stability, and the lowest detection limit of 9.0 ppb were achieved. These superior properties were probably ascribed to numerous heterojunctions favorable for additional carrier-concentration modulation via the synergetic effect between WS 2 and MoO 3 components and the large specific surface area beneficial for richer sorption sites and faster molecular transfer at room temperature. Such achievements also imply that the designed WS 2 /MoO 3 heterostructure nanomaterials have the potential in achieving trace NH 3 recognition catering for the requirements of high sensitivity and low power consumption in future gas sensors.

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Facile h-MoO3 synthesis for NH3 gas sensing application at moderate operating temperature

Cited by 56 publications

References 65 publications

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

Ultra-low concentration detection of NH3 using rGO/Cu2O nanocomposites at low temperature

Mesoporous WS₂/MoO₃ Hybrids for High-Performance Trace Ammonia Detection

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Facile h-MoO3 synthesis for NH3 gas sensing application at moderate operating temperature

Cited by 56 publications

References 65 publications

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

Fabrication of h-MoO3 Nanorods and the Properties of the MoO3/WEP Composite Coatings Research

Ultra-low concentration detection of NH3 using rGO/Cu2O nanocomposites at low temperature

Mesoporous WS2/MoO3 Hybrids for High-Performance Trace Ammonia Detection

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Mesoporous WS₂/MoO₃ Hybrids for High-Performance Trace Ammonia Detection