Room temperature sintering of polar ZnO nanosheets: III-Prevention

Fernández-Pérez, Amparo; Marbán, Gregorio

doi:10.1016/j.micromeso.2019.109836

Cited by 4 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Surface deposits, e.g., Cu 2 O/MoS 2 /ZnO composites on Cu mesh, can upgrade the ZnO system, reducing N 2 to NH 3 (with water as the proton source) in the liquid membrane reactor under simulated visible light [26]. The room temperature sintering of polar ZnO nanosheets was prevented by forming the surface layer of silica (2 atom %) [27]. The engineering of ZnOstructured surfaces is an issue of general interest.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

et al. 2022

View full text Add to dashboard Cite

Energy consumption steadily increases and energy production is associated with many environmental risks, e.g., generating the largest share of greenhouse gas emissions. The primary gas pollution concern is CO2, CH4, and nitrogen oxides (NOx). Environmental catalysis plays a pivotal role in NOx mitigation (DeNOx). This study investigated, for the first time, a collection of ceramic foams as potential catalyst support for selective catalytic NOx reduction (SCR). Ceramic foams could be an attractive support option for NOx removal. However, we should functionalize the surface of raw foams for such applications. A library of ceramic SiC, Al2O3, and ZrO2 foams ornamented with nanorod ZnO and TiO2 as W and V oxide support was obtained for the first time. We characterized the surface layer coating structure using the XPS, XRF and SEM, and TEM microscopy to optimize the W to V molar ratio and examine NO2 mitigation as the SCR model, which was tested only very rarely. Comparing TiO2 and ZnO systems reveals that the SCR conversion on ZnO appeared superior vs. the conversion on TiO2, while the SiC-supported catalysts were less efficient than Al2O3 and ZrO2-supported catalysts. The energy bands in optical spectra correlate with the observed activity rank.

show abstract

Section: Introductionmentioning

confidence: 99%

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

et al. 2022

View full text Add to dashboard Cite

show abstract

Titanium dioxide: A heterogeneous catalyst for dark peroxidation superior to iron oxide

Fernández-Pérez

Marbán

2020

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

NEW INSIGHT INTO THE EFFECT OF NOZZLE DIAMETER ON THE PROPERTIES OF SPRAYED ZnO THIN FILMS

et al. 2022

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanofibers and nanopetals were successfully deposited onto mesoporous silicon (meso-PSi), silicon, and glass substrates using zinc acetate via Spray Pyrolysis method. Electrochemical etching of the P-type (100) silicon wafer was used to prepare the mesoporous silicon layer. The effects of nozzle diameter and substrate type on the morphological, structural, and optical properties were investigated using XRD, SEM, EDX techniques, FT-IR, and UV-Vis spectrometry. Scanning Electron Microscopy (SEM) confirms the meso-PSi morphology with a diameter varying from 20[Formula: see text]nm to 45[Formula: see text]nm and illustrates the prepared ZnO nanostructures. EDX results show that the ratio of Zn:O is found to be similar to 1:1 for the 3-mm diameter when the oxygen is much higher than the Zn element in the 18-mm diameter. XRD measurements indicated that all films show a hexagonal Wurtzite structure with a variation of crystallographic properties and orientation according to the prepared morphology. The mean value of the crystallite size is 14.27[Formula: see text]nm for the 3-mm diameter and 19.01 nm for the 18-mm diameter. The variation in the morphological characteristics of the deposited ZnO leads to a variation in the optical properties of the sprayed ZnO thin films. The layers bandgap energy (Eg) was estimated to be 3.28 and 3.26[Formula: see text]eV for the ZnO layers prepared by 18-mm and 3-mm nozzle diameters, respectively. This study is also helpful for subsequent studies on the tailoring of morphology and ZnO growth control on PSi substrates.

show abstract

Room temperature sintering of polar ZnO nanosheets: III-Prevention

Cited by 4 publications

References 25 publications

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

Titanium dioxide: A heterogeneous catalyst for dark peroxidation superior to iron oxide

NEW INSIGHT INTO THE EFFECT OF NOZZLE DIAMETER ON THE PROPERTIES OF SPRAYED ZnO THIN FILMS

Contact Info

Product

Resources

About