CO sensing properties of Ga-doped ZnO prepared by sol–gel route

Hjiri, M.; Dhahri, R.; Mır, L. El; Bonavita, A.; Donato, Nicola; Leonardi, Salvatore Gianluca; Neri, G.

doi:10.1016/j.jallcom.2015.02.083

Cited by 63 publications

(37 citation statements)

References 28 publications

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“…Dopants usually make the host oxide lattice distortion, and thus change the crystalline such as the Cd‐doped ZnO as reported by Bai et al To further explore the effect of Ga dopant on the ZnO crystalline structure, high resolution XRD was measured as shown in Figure . As shown in Figure a and b, the diffraction peaks of pure ZnO correspond to (100), (002), and (101) planes, which is completely matched with the ZnO hexagonal wurtzite structure (PDF#36‐1451) . The same peaks were also observed on Ga‐doped samples.…”

Section: Resultssupporting

confidence: 59%

“…For example, ZnO is the earliest and most widely investigated n‐type semiconductor gas sensing materials which exhibited excellent gas sensing properties due to its high specific surface area, chemical stability, and activity . However, there still exist some drawbacks, such as high working temperature, and also the inevitably irregular aggregation of the nanoparticles hinders the diffusion of gases into the inner part of the secondary particles, then delay the further response …”

Section: Introductionmentioning

confidence: 99%

“…Doping with metals (Cd, In, Ni, Mn, etc.) is proved to be an effective way to improve gas sensing properties of metal oxide nano‐structures . For example, Ta‐doped WO 3 thick film has demonstrated an enhanced gas response and lower detection limits for the detection of NO 2 at 200 °C compared to previously reported sensors based on pure nanometric WO 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Ga 3+ has similar ionic covalent radius (0.62 Å) with Zn 2+ (0.74 Å), which is necessary to partly replace Zn 2+ without significant lattice distortion . From the electronic viewpoint, Ga 3+ dopants provide shallow donors in ZnO, which can effectively tailor the conductance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation

Zhou

Xie

Bian

et al. 2018

Physica Status Solidi (a)

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Ga‐doped ZnO nanoparticles are successfully prepared by a facile coprecipitation method and then are activated by H2 annealing. The as‐prepared ZnO powders are characterized by X‐ray diffractometer (XRD), Brunauer–Emmett–Teller (BET), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy, Raman and photoluminescence spectroscopies. Gas sensing property using NO2 as probe shows that the 1 at.% Ga‐ZnO powders activated in H2 at 540 °C showed high NO2 response of ≈50/ppm, high selectivity toward typical interferences such as ethanol, acetone, toluene, NO, SO2, C2H6, and C2H4 and high stability as measured at 200 °C. On the contrary, the pure ZnO and the Ga‐ZnO without H2 activation show far lower response, which illustrates the effect of Ga dopant activation by H2 annealing aimed for the high performance gas sensing materials.

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation

Zhou

Xie

Bian

et al. 2018

Physica Status Solidi (a)

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“…3b, the (002) peak is located at 34.39 for undoped ZnO and shifts to 34.53 for 1.18% Ga-doped ZnO NWs. The peaks shift is related to a reduction of interplanar spaces probably caused by the different ionic charge of the involved ions (Ga 3þ and Zn 2þ ) [23]. Fig.…”

Section: Methodsmentioning

confidence: 92%

Ga-doped ZnO nanowire nanogenerator as self-powered/active humidity sensor with high sensitivity and fast response

Zhao

et al. 2015

Journal of Alloys and Compounds

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A theoretical study on the pure and doped ZnO nanoclusters as effective nanobiosensors for 5‐fluorouracil anticancer drug adsorption

Zhihong

Pejhan

et al. 2020

Applied Organom Chemis

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The electronic sensitivity and effectiveness of the pristine, Fe,‐ Mg‐, Al‐ and Ga‐doped ZnO nanoclusters interacted with 5‐fluorouracil (5‐FU) anticancer drug are theoretically investigated in the gas phase using the B3LYP/wB97XD density functional theory calculations with LANL2DZ basis set. It is concluded that 5‐FU adsorption on the doped nanoclusters has relatively higher adsorption energy as compared with the pristine zinc oxide. A number of thermodynamic parameters, such as band gap energy (Eg), adsorption energy (Ead), molecular electrostatic potential, global hardness (η) and density of electronic states, are attained and compared. Also, calculated geometrical parameters and electronic properties for the studied systems indicate that Mg‐ and Ga‐doped Zn12O12 present higher sensitivity to 5‐FU compared with the pristine nanocluster. Theoretical results reveal that adsorption of 5‐FU on the doped nanoclusters is influenced by the electronic conductance of the nanocluster. Therefore, Mg‐ and Ga‐doped ZnO can be considered as promising nanobiosensors for detection of 5‐FU in medicine.

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CO sensing properties of Ga-doped ZnO prepared by sol–gel route

Cited by 63 publications

References 28 publications

Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation

Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation

Ga-doped ZnO nanowire nanogenerator as self-powered/active humidity sensor with high sensitivity and fast response

A theoretical study on the pure and doped ZnO nanoclusters as effective nanobiosensors for 5‐fluorouracil anticancer drug adsorption

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CO sensing properties of Ga-doped ZnO prepared by sol–gel route

Cited by 63 publications

References 28 publications

Enhanced NO2 Sensing Property of ZnO by Ga Doping and H2 Activation

Enhanced NO2 Sensing Property of ZnO by Ga Doping and H2 Activation

Ga-doped ZnO nanowire nanogenerator as self-powered/active humidity sensor with high sensitivity and fast response

A theoretical study on the pure and doped ZnO nanoclusters as effective nanobiosensors for 5‐fluorouracil anticancer drug adsorption

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Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation

Enhanced NO₂ Sensing Property of ZnO by Ga Doping and H₂ Activation