Synthesis, characterization, magnetic properties and gas sensing applications of ZnxCu1−xFe2O4 (0.0≤x≤0.8) nanocomposites

Singh, Archana; Singh, Satyendra; Joshi, B.D.; Shukla, Anuj; Yadav, B. C.; Tandon, Poonam

doi:10.1016/j.mssp.2014.08.029

Cited by 52 publications

(18 citation statements)

References 47 publications

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“…The reduction in the transmission with increasing film thickness may be attributed to the effect on the surface roughness and grain size boundary of the thin films, as described earlier [ 31 – 34 ]. Results obtained from Figs 2 and 3 were validated and depicted that with increasing film thicknesses, the surface roughness and the transmission were reduced.…”

Section: Resultsmentioning

confidence: 58%

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Haarindraprasad¹,

Hashim²,

Gopinath

et al. 2015

PLoS ONE

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The performance of sensing surfaces highly relies on nanostructures to enhance their sensitivity and specificity. Herein, nanostructured zinc oxide (ZnO) thin films of various thicknesses were coated on glass and p-type silicon substrates using a sol-gel spin-coating technique. The deposited films were characterized for morphological, structural, and optoelectronic properties by high-resolution measurements. X-ray diffraction analyses revealed that the deposited films have a c-axis orientation and display peaks that refer to ZnO, which exhibits a hexagonal structure with a preferable plane orientation (002). The thicknesses of ZnO thin films prepared using 1, 3, 5, and 7 cycles were measured to be 40, 60, 100, and 200 nm, respectively. The increment in grain size of the thin film from 21 to 52 nm was noticed, when its thickness was increased from 40 to 200 nm, whereas the band gap value decreased from 3.282 to 3.268 eV. Band gap value of ZnO thin film with thickness of 200 nm at pH ranging from 2 to 10 reduces from 3.263eV to 3.200 eV. Furthermore, to evaluate the transducing capacity of the ZnO nanostructure, the refractive index, optoelectric constant, and bulk modulus were analyzed and correlated. The highest thickness (200 nm) of ZnO film, embedded with an interdigitated electrode that behaves as a pH-sensing electrode, could sense pH variations in the range of 2-10. It showed a highly sensitive response of 444 μAmM-1cm-2 with a linear regression of R2 =0.9304. The measured sensitivity of the developed device for pH per unit is 3.72μA/pH.

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Section: Resultsmentioning

confidence: 58%

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Haarindraprasad¹,

Hashim²,

Gopinath

et al. 2015

PLoS ONE

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“…The size of Pd nanoparticles in Pd decorated hollow SnO 2 NFs, according to the high-resolution TEM, was several nanometers. As the size decreases, the catalytic activity of noble metal increases because of the manifold increase in surface area of the nanoparticles, which will enhance the rate of reaction/adsorption of gas on the sensing material and eventually increase the response [32][33][34]. And no other diffraction peaks corresponding to impurities were observed, which implied the absence of other impurities.…”

Section: Fabrication and Measurement Of Gas Sensormentioning

confidence: 99%

Preparation of Pd nanoparticle-decorated hollow SnO 2 nanofibers and their enhanced formaldehyde sensing properties

Lin

Wei

et al. 2015

Journal of Alloys and Compounds

109

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“…These spinel ferrites are studied more due to their magnetic property and semiconducting property [17]. Among all the ferrites, spinel copper ferrite is one of the most important ferrite and finds application as ferro fluids, humidity sensor, gas sensor [18] as catalyst for organic reactions and are used in multilayer chip induction, high speed digital tape or recording disks, rod antennas etc. [19].…”

Section: Introductionmentioning

confidence: 99%

Removal of malachite green from aqueous solution by magnetic CuFe2O4 nano-adsorbent synthesized by one pot solution combustion method

et al. 2017

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In the present investigation nano copper ferrite, CuFe 2 O 4 (CF) is synthesized by one pot energy saving solution combustion synthesis. The combustion derived copper ferrite nanoadsorbent is characterized by powder X-ray diffraction, Fourier transform infra-red spectroscopy, scanning electron microscopy, transmission electron microscopy and UV-Vis spectroscopy. The magnetic behavior is studied by Vibrating sample magnetometer measurements and the results shows it's a soft ferromagnet with low saturation magnetization and coercive effect. CF nanopowder is used as good magnetically separable nanoadsorbent. Adsorption property is evaluated by the removal of malachite green, a dye which is widely used by many industries, from its aqueous solution. Various parameters like contact time (5-30 min), adsorbent loading (0-45 mg) are investigated systematically by batch experiments. Adsorption isotherms and kinetic studies also conducted which shows that the adsorption follows pseudo second order mechanism. The experimental data fitted well with the Langmuir isotherm (R 2 = 0.978), yielding a maximum adsorption capacity of 22 mg/g. The optimum adsorbent dose was found to be 40 mg/L and stirring time experiment reveals that 85% of decolourization was observed for 30 min of stirring at neutral pH which is much more efficient than those reported in literature. Graphical abstract

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Synthesis, characterization, magnetic properties and gas sensing applications of ZnxCu1−xFe2O4 (0.0≤x≤0.8) nanocomposites

Cited by 52 publications

References 47 publications

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Preparation of Pd nanoparticle-decorated hollow SnO 2 nanofibers and their enhanced formaldehyde sensing properties

Removal of malachite green from aqueous solution by magnetic CuFe2O4 nano-adsorbent synthesized by one pot solution combustion method

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