Ordered mesoporous ZnO for gas sensing

Wagner, Thorsten; Waitz, Thomas; Roggenbuck, Jan; Fröba, Michael; Kohl, Claus-Dieter; Tiemann, Michael

doi:10.1016/j.tsf.2007.03.021

Cited by 130 publications

(85 citation statements)

References 29 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dye-sensitized solar cells (DSSCs) are pro mising, relatively low cost, and green energy photovoltaic devices [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dye-Sensitized Solar Cells Based on ZnO Films and Natural Dyes

El-Agez¹,

Tayyan²,

Al-Kahlout³

et al. 2012

IJMC

View full text Add to dashboard Cite

This work emp loys extracts fro m Walnuts, Rhubarb, and Po megranate as natural dyes for fabricat ion of dye-sensitized solar cells (DSSCs). ZnO nanoparticles with crystallite mean value 12 n m as confirmed fro m XRD data have been synthesized at pH 12. SEM p icture of the ZnO powder reveals ho mogeneous and well defined nanoparticles with size of about 15 n m. TEM micrograph shows that the powder has a porous agglomerate structure consisting main ly of spherical crystalline particles with about 15-20 n m diameter. ZnO films were deposited on Fluorinated Tin Oxide (FTO) coated glass sheets followed by sintering at 450℃. The samples were sensitized by soaking in the dye solution. A Graphite slab was used as a back electrode, and redo x was employed as an electrolyte. Each cell was illu minated with light intensities in the range 40,000-100,000 Lux to measure the photovoltaic parameters. The experimental results shows that the highest I sc value is obtained fro m the DSSC sensitized with Rhubarb extract while the highest V oc value is obtained from the DSSC sensitized with the Walnuts extract. The P max of the DSSC sensitized by the Walnuts extract is greater than those sensitized by Rhubarb and Po megranate ext racts. Moreover, the open circuit voltage V oc decay was found to closely fo llo w a pseudo single exponential form.

show abstract

“…Dye-sensitized solar cells (DSSCs) are pro mising, relatively low cost, and green energy photovoltaic devices [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dye-Sensitized Solar Cells Based on ZnO Films and Natural Dyes

El-Agez¹,

Tayyan²,

Al-Kahlout³

et al. 2012

IJMC

View full text Add to dashboard Cite

show abstract

“…The gas-sensing performance of sensors based on mesoporous and hollow nanostructures is well reviewed elsewhere [58,71], and it is agreed that such structures are really attractive platforms for gas-sensing applications [65,72,73]. Mesoporous and hollow structures have been reported to show very high gassensing response [74][75][76] and fast response kinetics [77], which are attributed to their high surface area and welldefined porous architecture. Especially big difference in kinetics of sensor response was observed in comparison with sensors fabricated using agglomerated powders [78].…”

Section: Mesoporous Macroporous and Hierarchical Metal Oxide Structuresmentioning

confidence: 99%

Material Design for Metal Oxide Chemiresistive Gas Sensors

Han¹,

Cho²

2013

Journal of Sensor Science and Technology

View full text Add to dashboard Cite

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses /bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Journal of SensorScience and Technology Vol. 22, No. 1 (2013) pp. 1- AbstractMetal oxides designed for application in conductometric gas sensors and approaches used for synthesis of metal oxides with improved gas sensing characteristics are discussed in present article.

show abstract

“…19), 20) Most of previous researches for fabricating porous ZnO ceramics were focused on processing and characterization of thin or thick films, 17),18),21), 22) microspheres, 23), 24) plates, 16), 25) microtubes, 26) and powders. 13), 15) Only a few papers reported processing of porous bulk ZnO ceramics. Saito et al 27) fabricated porous ZnO ceramics by partially sintering ZnO compact containing aluminum source at 900°C.…”

Section: )9)mentioning

confidence: 99%

Processing and structural characteristics of encapsulated ZnO in porous polysiloxane-derived ceramics

Kim

Eom

Kim

2011

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

A facile processing strategy based on a simple pressing and heat-treatment at 800°C in air or argon was successfully demonstrated for fabricating encapsulated ZnO in porous polysiloxane-derived ceramic matrix. The composite samples contain ZnO crystallites with wurtzite structure embedded in amorphous SiO 2 or SiOC matrix and have 5158% porosity depending on the starting polysiloxane content and heat-treatment atmosphere. For the samples heat-treated in air, the one with more ZnO content in the batch composition showed higher green-emission intensity as well as lower excitonic-emission intensity in photoluminescence (PL) spectrum compared to the one with less ZnO content. The result can be understood in terms of the amount of defects such as oxygen vacancies in the ZnO crystallites: the former has higher defect density than the latter. Raman spectra for the two samples support the interpretation. The samples heat-treated in argon exhibit weaker PL strength compared to the air-treated ones in the whole photon-energy range, attributable to the secondary phase (ZnSiO 3 ) formation.

show abstract

Ordered mesoporous ZnO for gas sensing

Cited by 130 publications

References 29 publications

Dye-Sensitized Solar Cells Based on ZnO Films and Natural Dyes

Dye-Sensitized Solar Cells Based on ZnO Films and Natural Dyes

Material Design for Metal Oxide Chemiresistive Gas Sensors

Processing and structural characteristics of encapsulated ZnO in porous polysiloxane-derived ceramics

Contact Info

Product

Resources

About