Porous Zinc Oxide Thin Films: Synthesis Approaches and Applications

Laurenti, Marco; Cauda, Valentina

doi:10.3390/coatings8020067

Cited by 68 publications

(38 citation statements)

References 128 publications

(136 reference statements)

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“…Over the past decade, photocatalysis technologies is the most promising for environmental purification and conversion of solar energy and ultra-violet (UV) [10,11,12,13]. Multifunctional properties such as a combination of optical, semiconducting and catalytic of metal oxides (ZnO [14] and MoO 3 ) thin films have been recently investigated. Photocatalytic properties of thin films have not been much studied until recently.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Fe,Co-Codoped MoO3 Thin Films

et al. 2019

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Molybdenum oxide (MoO3) and Fe,Co-codoped MoO3 thin films obtained by spray pyrolysis have been in-depth investigated to understand the effect of Co and Fe codoping on MoO3 thin films. The effect of Fe and Co on the structural, morphological and optical properties of MoO3 thin films have been studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy-dispersive X-ray analysis (EDAX), optical and photoluminescence (PL) spectroscopy, and electropyroelectric methods. The XRD patterns demonstrated the formation of orthorhombic α-MoO3 by spray pyrolysis. SEM characterization has shown an increase in roughness of MoO3 thin films by Fe and Co doping. Optical reflectance and transmittance measurements have shown an increase in optical band gap with the increase in Fe and Co contents. Thermal conductivity and thermal diffusivity of Fe,Co-doped MoO3 were 24.10–25.86 Wm−1K−1 and 3.80 × 10−6–5.15 × 10−6 m2s−1, respectively. MoO3 thin films have shown PL emission. Doping MoO3 with Fe and Co increases emission in the visible range due to an increase number of chemisorbed oxygen atoms. The photodegradation of an aqueous solution of methylene blue (MB) depended on the content of the codoping elements (Fe,Co). The results showed that a degradation efficiency of 90% was observed after 60 min for MoO3: Fe 2%-Co 1%, while the degradation efficiency was about 35% for the undoped MoO3 thin film.

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Section: Introductionmentioning

confidence: 99%

Nanostructured Fe,Co-Codoped MoO3 Thin Films

et al. 2019

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“…Meanwhile, the literature also presents information regarding the use of other materials, such as ZnO [7] and graphitic carbon nitride (g-C 3 N 4 ) [62,63]. ZnO is also a semiconductor material with a band gap of about 3.3 eV [64,65], while g-C 3 N 4 is a new type of non-metal photocatalyst that has a band gap of~2.7 eV [62,63,66]. TiO 2 is commonly used on a nanometer scale (between 6 and 40 nm) [38,[67][68][69].…”

Section: Materials and Techniques For Application Of Photocatalytic Ementioning

confidence: 99%

Smart, Photocatalytic and Self-Cleaning Asphalt Mixtures: A Literature Review

et al. 2019

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Nowadays, there is increasing concern in transportation engineering about the use of techniques less harmful to the environment and also about road safety. Heterogeneous photocatalysis based on the application of semiconductor materials onto asphalt mixtures is a promising technology because it can mitigate air pollution and road accidents. The functionalized asphalt mixtures with photocatalytic capability can degrade pollutants, such as damaging gases and oil/grease adsorbed on their surface, from specific reactions triggered by sunlight photons, providing significant environmental and social benefits. In this article, a review of photocatalysis applied in asphalt mixtures is presented. The most important characteristics related to the functionalization of asphalt mixtures for photocatalytic applications and their corresponding characterization are presented, and the achieved main results are also discussed.

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“…There are different kinds of metal oxides for gas detections like ZnO [7], SnO 2 [8], In 2 O 3 [9], Fe 2 O 3 [10], and TiO 2 [11]. Among these metal oxides, ZnO thin films are considered mostly for developing the gas sensor [12,13]. The main reason is due to the easy availability and easy deposition methods.…”

Section: Introductionmentioning

confidence: 99%

Au Doping ZnO Nanosheets Sensing Properties of Ethanol Gas Prepared on MEMS Device

Nagarjuna

Hsiao

2020

Coatings

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Sensitivity of the Micro Electro Mechanical System (MEMS) device ZnO nanosheets sensor and the Au doped ZnO nanosheets sensor has been investigated. The ZnO samples have been prepared using Hydrothermal synthesis at 90 °C. The prepared ZnO nanostructure is tested for structural morphology and crystallinity properties. The elemental analysis of the ZnO sample and Au–ZnO samples are tested by using Energy Dispersive X-ray Spectroscopy (EDS) spectrum analysis. MEMS device microheater is designed and prepared for testing the sensitivity of Ethanol gas. Thermal properties of the MEMS microheater is studied for better gas testing at different temperatures. Both the ZnO nanosheets sensor and Au doped ZnO nanosheets sensor are tested using Ethanol gas, and the gas concentrations are taken to be 15, 30, 45, and 60 ppm at 300 °C. The gas sensing response of pure ZnO nanosheets tested for ethanol gas at 60 ppm showed 20%, while the Au–ZnO nanosheets showed 35%, which is increased by 15% at similar operating conditions.

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Porous Zinc Oxide Thin Films: Synthesis Approaches and Applications

Cited by 68 publications

References 128 publications

Nanostructured Fe,Co-Codoped MoO3 Thin Films

Nanostructured Fe,Co-Codoped MoO3 Thin Films

Smart, Photocatalytic and Self-Cleaning Asphalt Mixtures: A Literature Review

Au Doping ZnO Nanosheets Sensing Properties of Ethanol Gas Prepared on MEMS Device

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