Growth and properties of Ag-doped ZnO nanoflowers for highly sensitive phenyl hydrazine chemical sensor application

Ibrahim, Ahmed A.; Dar, G. N.; Zaidi, Shabi Abbas; Umar, Ahmad; Abaker, M.; Bouzid, Houcine; Baskoutas, Sotirios

doi:10.1016/j.talanta.2012.02.030

Cited by 104 publications

(41 citation statements)

References 35 publications

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“…Among these sensors, oxide-based semiconductor gas sensors play an important role in various applications, such as environmental monitoring, personal safety and the control of industrial processes [4,5]. ZnO, SnO 2 , WO 3 , In 2 O 3 and TiO 2 are widely studied oxides for gas sensing applications [6–8]. Various approaches have been used to improve the response and selectivity of these oxides [9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ethanol Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanostructures

Tharsika

Haseeb

Akbar

et al. 2014

Sensors

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An inexpensive single-step carbon-assisted thermal evaporation method for the growth of SnO2-core/ZnO-shell nanostructures is described, and the ethanol sensing properties are presented. The structure and phases of the grown nanostructures are investigated by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques. XRD analysis indicates that the core-shell nanostructures have good crystallinity. At a lower growth duration of 15 min, only SnO2 nanowires with a rectangular cross-section are observed, while the ZnO shell is observed when the growth time is increased to 30 min. Core-shell hierarchical nanostructures are present for a growth time exceeding 60 min. The growth mechanism for SnO2-core/ZnO-shell nanowires and hierarchical nanostructures are also discussed. The sensitivity of the synthesized SnO2-core/ZnO-shell nanostructures towards ethanol sensing is investigated. Results show that the SnO2-core/ZnO-shell nanostructures deposited at 90 min exhibit enhanced sensitivity to ethanol. The sensitivity of SnO2-core/ZnO-shell nanostructures towards 20 ppm ethanol gas at 400 °C is about ∼5-times that of SnO2 nanowires. This improvement in ethanol gas response is attributed to high active sensing sites and the synergistic effect of the encapsulation of SnO2 by ZnO nanostructures.

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Section: Introductionmentioning

confidence: 99%

Enhanced Ethanol Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanostructures

Tharsika

Haseeb

Akbar

et al. 2014

Sensors

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“…In order to enhance the structural and versatile properties of ZnO structural modifications have usually been utilized, among which metal ion doping is the most well known and effective approach to meet the different requirements of application. There have been various reports on the utilization of several metals such as Ga, Mn, Al, Ag and Co [28][29][30][31][32][33][34][35][36][37], to tailor the desirable properties of ZnO nanomaterials. In addition rare earth ion doped ZnO has the potential to be a highly multifunctional material with coexisting semiconducting and optical properties.…”

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confidence: 99%

Structural, diffused reflectance and photoluminescence study of cerium doped ZnO nanoparticles synthesized through simple sol–gel method

Pandey

Kurchania

Haque

2015

Optik

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“…This phenomenon helps to boost the sensing mechanism, and hence improve sensing performance [21]. Among numerous metals, Ag has attracted immense interest, due to its promising catalytic properties, in the development of photocatalysis [22,23], catalytic oxidation [24], chemical and gas sensing [25,26], etc. A number of Ag-ZnO nanostructure-based highperformance gas sensors have been reported [25,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%