Synthesis and enhanced ethanol sensing properties of α-Fe2O3/ZnO heteronanostructures

Zhu, Chunling; Chen, Y.J.; Wang, R.X.; Wang, L.J.; Cao, Mao‐Sheng; Shi, Xiaoling

doi:10.1016/j.snb.2009.04.011

Cited by 171 publications

(58 citation statements)

References 32 publications

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“…On the other hand, the significant improvement of the response of the WO 3 nanorods to NO 2 gas by encapsulating them with ZnO can be explained by the space-charge model [33,34]. NO 2 is a strong oxidizing gas.…”

Section: Resultsmentioning

confidence: 99%

Enhanced NO2 gas sensing properties of WO3 nanorods encapsulated with ZnO

Park

et al. 2012

Appl. Phys. A

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The influence of the encapsulation of WO 3 nanorods with ZnO on the NO 2 gas sensing properties was examined. WO 3 -core/ZnO-shell nanorods were fabricated by a two-step process comprising the catalyst-free thermal evaporation of a mixture of WO 3 and graphite powders in an oxidizing atmosphere and atomic layer deposition of ZnO. Multiple networked WO 3 -core/ZnO-shell nanorod sensors showed the response of 281 % at 5 ppm NO 2 at 300°C. This response value was approximately 9 times larger than that of bare WO 3 nanorod sensors at 5 ppm NO 2 . The response values obtained from the WO 3 -core/ZnO-shell nanorods in this study were more than 5 times higher than those obtained previously from the SnO 2 -core/ZnO-shell nanofibers at the same NO 2 concentration range. The significant enhancement in the response of WO 3 nanorods to NO 2 gas by encapsulating them with ZnO can be accounted for based on the space-charge model.

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Section: Resultsmentioning

confidence: 99%

Enhanced NO2 gas sensing properties of WO3 nanorods encapsulated with ZnO

Park

et al. 2012

Appl. Phys. A

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“…Ir ziņas par Fe x O y /ZnO nanokompozītu izmantošanu ķīmisko sensoru izgatavošanā [9,[13][14][15]. Galvenā priekšrocība ķīmiskajiem sensoriem ir ne tikai to augstā jutība un selektivitāte, lai noteiktu nepieciešamo gāzi, bet arī spēja strādāt nepārtrauktā režīmā istabas temperatūrā.…”

Section: Ievadsunclassified

“…Viendimensionālo (1D) metālu oksīdu nanostruktūras, ar augstu virsmas/tilpuma attiecību, ir piesaistījuši lielāku uzmanību, pateicoties iespējai kontrolēt to struktūru un virsmas morfoloģiju. Otra priekšrocība bieziem pārklājumiem ir tāda, ka 1D nanostruktūra atļauj veidoties jutīgajā virskārtā citām tukšajām vietām, kā rezultātā tas dod ātrāku sensoru reakciju un reģenerāciju [14].…”

Section: Ievadsunclassified

FexOy-ZnO kompozītu nanodaļiņu sintēze un raksturošana

Gabrene

Zukuls

Juhņeviča

et al. 2014

Material Science and Applied Chemistry

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Kopsavilkums. Organisko un neorganisko nanokompozītu materiālu klase ir ātri augoša pētniecības nozare. Pašlaik nemitīgi tiek meklētas jaunas iespējas uzlabot un kontrolēt to nanomēroga struktūras ar inovatīvām sintēzes metodēm. Metālu oksīdu kompozītu pielietojumu nosaka to fotokatalītiskās, magnētiskās un fotoluminiscentās īpašības.Ar nogulsnēšanas metodi iegūti Fe x O y -ZnO kompozīti ar dažādu Zn 2+ :Fe 3+ attiecību, kuru raksturošanai izmantota rentgenstaru difrakcijas analīze, Furjē-IS spektroskopija, gaismas absorbcijas un fotoluminiscences spektroskopija, kā arī veikti gāzes jutības mērījumi.Atslēgas vārdi: metālu oksīdu kompozīti, dzelzs oksīdi, cinka oksīds, nogulsnēšana, sāls šķīdumi.

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“…However, very few of them are suitable to fulfil all the requirements. To overcome these limitations, researchers have recently been focused on composite materials like SnO 2 -ZnO [16], Fe 2 O 3 -ZnO [17], ZnO-CuO [18], etc., because it has been recognized that sensors developed by mixing two components together are more sensitive than those made of individual component. This is due to a synergistic effect between two metal oxides [17].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these limitations, researchers have recently been focused on composite materials like SnO 2 -ZnO [16], Fe 2 O 3 -ZnO [17], ZnO-CuO [18], etc., because it has been recognized that sensors developed by mixing two components together are more sensitive than those made of individual component. This is due to a synergistic effect between two metal oxides [17]. Preparation of mixed oxides leads to alteration of the electronic structure of the system which causes changes in the bulk as well as in the surface properties [19].…”

Section: Introductionmentioning

confidence: 99%

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO2

Pedhekar¹,

Raghuwanshi²,

Kapse

2016

Materials Science-Poland

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Nanocrystalline ZnO-TiO 2 (with molar ratios 9:1, 7:3, 1:1, 3:7 and 1:9) were successfully synthesized by hydrothermal method. Synthesized materials were examined with the help of X-ray diffraction and transmission electron microscope. Liquid petroleum gas sensing characteristics of the ZnO-TiO 2 films were investigated at different operating temperatures. The ZnO-TiO 2 thick film (with 1:1 molar ratio) exhibited good response toward liquid petroleum gas as compared to other investigated compositions. Further, liquid petroleum gas sensing characteristics of CuO modified ZnO-TiO 2 thick films were investigated. 0.2 M CuO modified ZnO-TiO 2 thick film exhibited excellent liquid petroleum gas sensing characteristics such as higher response (∼1637.49 at 185°C) with quick response time (∼30 s), low recovery time (∼70 s), excellent repeatability and stability at low operating temperature.

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Synthesis and enhanced ethanol sensing properties of α-Fe2O3/ZnO heteronanostructures

Cited by 171 publications

References 32 publications

Enhanced NO2 gas sensing properties of WO3 nanorods encapsulated with ZnO

Enhanced NO2 gas sensing properties of WO3 nanorods encapsulated with ZnO

FexOy-ZnO kompozītu nanodaļiņu sintēze un raksturošana

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO2

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