Investigation of H2S gas sensing performance of Ni:WO3 films at room temperature: nickel precursor effect

Er, İrmak Karaduman; Sarf, Fatma; Yakar, Emin

doi:10.1007/s10854-021-07537-3

Cited by 6 publications

(5 citation statements)

References 40 publications

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“…The samples exhibited highly crystalline diffraction patterns that corresponds to the monoclinic phase of WO 3 according to the JCPDS card no. 89-4476, with the miller indices ( 002), ( 020), ( 200), ( 120), ( 112), ( 022), ( 202), ( 222), ( 004), ( 040), ( 140) and ( 420) (Vilic and Llobet, 2016;Karaduman Er et al, 2022).…”

Section: Structural and Morphological Characteristics Of Wo 3 Sensorsmentioning

confidence: 99%

“…Figure 2C shows that WO 3 -H 2 SO 4 consists of nano-cubes like structures; Figure 2E also shows Frontiers in Sensors frontiersin.org hierarchical nanostructures of WO 3 -HCl, however, small nanoparticles can be observed on the surface morphology of this sample, which are more noticeable than on the WO 3 -HNO 3 . It is clear that, the type of acids precipitants (HNO 3 , H 2 SO 4 , and HCl) influenced the morphological structure of the samples, which also affects their gas sensing performance (Karaduman Er et al, 2022).…”

Section: Structural and Morphological Characteristics Of Wo 3 Sensorsmentioning

confidence: 99%

“…Many significant efforts have been made towards the developments of H 2 S sensors-an example is the addition of metal nanoparticles such as Pt (Van Toan et al, 2021), Pd (Wu et al, 2019), Ru (Kruefu et al, 2015), and Ni (Vilic and Llobet, 2016;Karaduman Er et al, 2022) on metal oxides semiconductors, for catalytic effects. This was done for the purpose of enhancing their gas sensing performance towards H 2 S at low operating temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…This was done for the purpose of enhancing their gas sensing performance towards H 2 S at low operating temperatures. However, besides the high cost of these metals, low sensor responses were observed due to the inhomogeneity of the final structure of the gas sensing layers, which underwent unavoidable aggregation; thus worsening their gas sensing performance (Vilic and Llobet, 2016;Karaduman Er et al, 2022), (Wang et al, 2022). High sensor response, short response, and recovery times remain paramount in H 2 S detection (Vilic and Llobet, 2016;Karaduman Er et al, 2022), (Vilic and Llobet, 2016;Karaduman Er et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…However, besides the high cost of these metals, low sensor responses were observed due to the inhomogeneity of the final structure of the gas sensing layers, which underwent unavoidable aggregation; thus worsening their gas sensing performance (Vilic and Llobet, 2016;Karaduman Er et al, 2022), (Wang et al, 2022). High sensor response, short response, and recovery times remain paramount in H 2 S detection (Vilic and Llobet, 2016;Karaduman Er et al, 2022), (Vilic and Llobet, 2016;Karaduman Er et al, 2022). Wang et al (Vilic and Llobet, 2016) synthesized bimodal carbon modified porous WO 3 using methanol solution to obtain C/WO 3 precipitates as the final product.…”

Section: Introductionmentioning

confidence: 99%

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The effect of acids precipitants on the synthesis of WO3 hierarchical nanostructures for highly selective and sensitive H2S detection

Mpanza

Ogundipe²,

Ndlangamandla³

et al. 2023

Front. Sens.

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The detection and monitoring of H2S gas at high and lower concentrations is very crucial since this gas is highly toxic and can affect tissues and organs, especially in occupational environment. This work reports on the synthesis of WO3 nanostructures-based sensors for highly sensitive and selective H2S detection at low operating temperatures. These WO3 nanostructures were synthesized using pressurized hydrothermal process. Different acids from weak to strong (HNO3, H2SO4, and HCl) were employed as precipitants to form supposedly hierarchical and cube-like nanostructures of WO3. These WO3 nanostructures were characterized by XRD, SEM, TEM, XPS and BET analysis. The fabricated WO3 sensors were exposed to different target gases (CO2, H2, CH4, NH3, LPG and H2S) at different concentrations. They were found to be selective to H2S, and the WO3 precipitated by HCl otherwise referred to as WO3-HCl was found to be highly sensitive, with high response of S = 1394.04 towards 150 ppm of H2S at 125°C operating temperature. The WO3 precipitated by H2SO4 named WO3-H2SO4 showed a high response of 141.64 at 125°C operating temperature. Lastly, WO3 precipitated by HNO3 called WO3-HNO3, recorded a H2S response of 125.75 also at 125°C operating temperature. The HCl-precipitated WO3 is a promising candidate for selective detection of H2S, being the most sensitive in the series.

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Section: Structural and Morphological Characteristics Of Wo 3 Sensorsmentioning

confidence: 99%

Section: Structural and Morphological Characteristics Of Wo 3 Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of acids precipitants on the synthesis of WO3 hierarchical nanostructures for highly selective and sensitive H2S detection

Mpanza

Ogundipe²,

Ndlangamandla³

et al. 2023

Front. Sens.

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Room-temperature gas sensing properties of Zn, Sn and Cu-doped TiO2 films

Çorlu,

Tekin,

Karaduman Er

et al. 2023

J Mater Sci: Mater Electron

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Enhanced sensing performance of carboxymethyl cellulose sodium to hydrogen sulphide gas and methylene blue dye by constructing CuO@ZnO core/shell heterostructure: A DFT/TD-DFT study

Badry,

Nada,

El-Nahass

et al. 2023

Opt Quant Electron

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Anthropogenic air and water pollution are two of the world's most serious public health threats, causing around 9 million fatalities each year. Accordingly, CuO, ZnO, and CuO@ZnO core/shell structures were optimized utilizing the time-dependent density functional theory (TD-DFT) method to study the effect of CuO@ZnO core/shell on the sensitivity of carboxymethyl cellulose sodium (CMC). Absorption spectra and optical band gap (Eg) have been investigated utilizing the TD-DFT method. The calculated Eg values for CuO and ZnO equal 1.23 and 3.29 eV, respectively, which agree well with those reported in the literature. The effects of H2S gas and methylene blue dye (MB) adsorption on the electronic characteristics of dimer CMC /CuO@ZnO structures were investigated in terms of TDM, HOMO/LUMO energy, and molecular electrostatic potential (MESP). The TDM in dimer CMC/CuO@ZnO structure was increased to 72.152 and 67.606 Debye, while ΔE was reduced by 6.42% and 82.57% due to the adsorption of H2S and MB dye, respectively. This means that it has a faster response to MB than to H2S. Additionally, MESP confirms the increased reactivity of dimer CMC/CuO@ZnO due to the adsorption process. As a result, dimer CMC/CuO@ZnO structures appear to be attractive candidates for H2S and MB dye sensing applications.

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Investigation of H2S gas sensing performance of Ni:WO3 films at room temperature: nickel precursor effect

Cited by 6 publications

References 40 publications

The effect of acids precipitants on the synthesis of WO3 hierarchical nanostructures for highly selective and sensitive H2S detection

The effect of acids precipitants on the synthesis of WO3 hierarchical nanostructures for highly selective and sensitive H2S detection

Room-temperature gas sensing properties of Zn, Sn and Cu-doped TiO2 films

Enhanced sensing performance of carboxymethyl cellulose sodium to hydrogen sulphide gas and methylene blue dye by constructing CuO@ZnO core/shell heterostructure: A DFT/TD-DFT study

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