Structural, textural, surface chemistry and sensing properties of mesoporous Pr, Zn modified SnO 2 –TiO 2 powder composites

Dascalu, Izabella; Culiță, Daniela C.; Calderón-Moreno, José Maria; Osiceanu, Petre; Hornoiu, Cristian; Anastasescu, Mihai; Şomăcescu, Simona; Gärtner, M.

doi:10.1016/j.ceramint.2016.06.146

Cited by 5 publications

(7 citation statements)

References 23 publications

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“…The software Z-view was used to fit the impedances of specific electrical circuits to the Nyquist experimental data (Nyquist representations) [ 1 , 13 , 14 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

“…For STZP film, the highest CO sensitivity (~5) was obtained for CO 2000 ppm concentrations at 350 and 400 °C, as shown in Figure 4 b. The higher value of the sensitivity to CO of the film compared to the powder [ 1 ] is due to the lower treatment temperature of the mixed oxides.…”

Section: Resultsmentioning

confidence: 99%

“…The correspondence of the semicircles obtained with the different regions of the sample, in this case the Nyquist representations, showed two semicircles for CO atmosphere [ 1 ]. The impedance parameters obtained by fitting experimental impedance data are listed in Table 2 (where Rgb is grain boundary resistance, Rb is bulk resistance, and CPE-T and CPE-P are constant phase parameters).…”

Section: Resultsmentioning

confidence: 99%

“…Nanocrystalline semiconductor metal oxides with controlled composition are of great interest in the field of gas sensors. Recently, many papers have been reported regarding the combination of SnO 2 , SiO 2 , In 2 O 3 , CeO 2 , TiO 2 , and ZnO to obtain materials with structural, optical, electrical, photocatalytic, and sensing properties [ 1 , 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…The powder of the mixed oxide of Sn, Ti, Zn, and Pr was shown to improve electrical properties by doping, and consequently Pr can increase the sensory performances of materials [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

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Layered Sol–Gel Deposition of a Sn, Ti, Zn, and Pr Mixed Oxide Thin Film with Electrical Properties for Gas Sensing

Dascalu

Hornoiu

Moreno

et al. 2023

Gels

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This article presents a layered mixed oxide thin film composed of Sn, Ti, Zn, and Pr obtained by sol–gel deposition for gas sensing applications. The film was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV-Vis spectroscopy, Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), and Electrochemical impedance spectroscopy (EIS). X-ray diffraction results showed the presence of a single crystalline phase with a cassiterite-like structure. Raman spectroscopy revealed characteristic bands of oxygen-deficient SnO2-based nanocrystallites. The band gap energy calculated from UV-Vis spectroscopy is Eg = 3.83 eV. The XPS proved the presence on the surface of all elements introduced by the inorganic precursors as well as their oxidation states. Thus, Sn4+, Ti4+, Zn2+, and Pr3+ were detected on the surface. Moreover, by XPS, we highlighted the presence of OH groups and water adsorbed on the surface. SEM showed the five-layer morphology of the film after five successive depositions. Electrochemical properties were determined by EIS-impedance spectroscopy. The selectivity for gas sensing was also investigated for methane, propane, and formaldehyde and the gas sensing mechanism was explained. The results indicated that the mixed oxide thin film exhibited high sensitivity and selectivity towards specific gases.

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“…The software Z-view was used to fit the impedances of specific electrical circuits to the Nyquist experimental data (Nyquist representations) [ 1 , 13 , 14 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The powder of the mixed oxide of Sn, Ti, Zn, and Pr was shown to improve electrical properties by doping, and consequently Pr can increase the sensory performances of materials [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Layered Sol–Gel Deposition of a Sn, Ti, Zn, and Pr Mixed Oxide Thin Film with Electrical Properties for Gas Sensing

Dascalu

Hornoiu

Moreno

et al. 2023

Gels

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show abstract

High-performance photoluminescence-based oxygen sensing with Pr-modified ZnO nanofibers

Jiang

Zhang

et al. 2019

Applied Surface Science

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Praseodymium (Pr)-modified zinc oxide (ZnO) nanofibers have been fabricated using an electrospinning-calcination method. These Pr-modified ZnO nanofibers present porous morphologies containing numerous ZnO nanocrystallites with average sizes that are much smaller than those found in pure ZnO nanofibers formed by the same procedures. Most Pr is identified at the surface of / interface between the nanocrystallites. In addition to the morphological modifications, addition of Pr is also shown to enhance the crystalline quality of the ZnO.Consequently, the Pr-modified ZnO nanofibers have a higher UV emission efficiency and exhibit a much-enhanced UV emission-based O 2 sensing performance than the pure ZnO nanofibers. By way of illustration, the Pr-modified nanofibers show O 2 sensing responses of R = 39% at room temperature and R = 71% at 115 °C (cf. R = 19% and 52% with the pure ZnO nanofibers at these same operating temperatures). These results suggest that electrospun Pr-modified ZnO nanofibers hold real promise for high-performance optical gas sensing applications.

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Fe+3- Mn+4 and Ti+4- Mn+3 interactions effect on the structural, electronic, magnetic and magnetoelectronic properties of perovskite manganites

Singh

Gupta

2022

Ceramics International

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Structural, textural, surface chemistry and sensing properties of mesoporous Pr, Zn modified SnO 2 –TiO 2 powder composites

Cited by 5 publications

References 23 publications

Layered Sol–Gel Deposition of a Sn, Ti, Zn, and Pr Mixed Oxide Thin Film with Electrical Properties for Gas Sensing

Layered Sol–Gel Deposition of a Sn, Ti, Zn, and Pr Mixed Oxide Thin Film with Electrical Properties for Gas Sensing

High-performance photoluminescence-based oxygen sensing with Pr-modified ZnO nanofibers

Fe+3- Mn+4 and Ti+4- Mn+3 interactions effect on the structural, electronic, magnetic and magnetoelectronic properties of perovskite manganites

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