Ultrasonic-induced disorder engineering on ZnO, ZrO2, Fe2O3 and SnO2 nanocrystals

Fan, Chenyao; Yu, Siqi; Qian, Guodong; Wang, Zhiyu

doi:10.1039/c7ra01209h

Cited by 19 publications

(8 citation statements)

References 45 publications

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“…Fan et al reported that the disorder engineering around the crystal lattice of ZnO, ZrO 2 , Fe 2 O 3 , and SnO 2 causes the band gap narrowing . In agreement with the reported results, the suppression of E g of ZnO in case of ZnO deposited on NiO‐7 could be due to the structural disorder present in the sample which is responsible for the suppression of E g of ZnO deposited on NiO‐4.…”

Section: Resultssupporting

confidence: 77%

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Das

Biswal

Choudhary

et al. 2017

Surface & Interface Analysis

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Evolution of surface features and optical band gap of ZnO thin films deposited on different NiO/ Si(100) are reported. In order to create different initial microstructure, we first deposited NiO film on Si(100) at 3 different temperatures (400°C, 650°C, and 700°C) by pulsed laser deposition.These NiO/Si(100) films are used as substrate for the deposition of ZnO films. Combining the results obtained from grazing incidence X-ray diffraction, atomic force microscope, and UV-Visible characterization, our study indicated that the microstructure of the substrate takes the important role in dictating properties of the film. Our study also indicated that one needs to choose appropriate synthesis condition to achieve good quality ZnO films.

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Section: Resultssupporting

confidence: 77%

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Das

Biswal

Choudhary

et al. 2017

Surface & Interface Analysis

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“…There have been many reports about the formation of defects by either or both of these effects, such as oxygen vacancies in metal oxides by ultrasonic treatment (e.g., SiO 2 , , Nb 2 O 5 , MoO 3 , ZnO, ZrO 2 , Fe 2 O 3 , SnO 2 ). In particular, Osorio-Vargas et al showed that oxygen vacancies are formed during low-frequency US treatment of TiO 2 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…In addition, there can also be a variety of mechanical effects on solid particles arising from ultrasound treatment, such as microjets and shock waves, which can both damage the solid surface. 16,17 There have been many reports about the formation of defects by either or both of these effects, such as oxygen vacancies in metal oxides by ultrasonic treatment (e.g., SiO 2 , 18,19 Nb 2 O 5 , 20 MoO 3 , 21 ZnO, ZrO 2 , Fe 2 O 3 , SnO 2 22 ). In particular, Osorio-Vargas et al showed that oxygen vacancies are formed during low-frequency US treatment of TiO 2 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Early-Stage Deactivation of Platinum-Loaded TiO₂ Using In Situ Photodeposition during Photocatalytic Hydrogen Evolution

Haselmann

Eder

2017

ACS Catal.

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This work unravels a sudden deactivation of Pt/TiO 2 (P25) during the initial stages of photocatalytic H 2 evolution from aqueous solution that, until now, has gone unnoticed, using a unique combination of in situ photodeposition of Pt with an on-line gas detector system. Utilizing a set of techniques, including highresolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (DRS-UV-vis), X-ray powder diffraction (XRD), Raman spectroscopy, and physisorption, we were able to attribute this deactivation to a shift in mechanism, accompanied by an increase in CO concentration. Key to this phenomenon is the ratio of Pt atoms to oxygen vacancies, which were created through ultrasonic pretreatment and in situ UV irradiation in the bulk and surface, respectively. We also observed a potential additional contribution to the deactivation by encapsulation of the Pt nanoparticles, indicating that strong metal−support interaction (SMSI) may indeed happen in aqueous and ambient conditions. Furthermore, we encourage implementing the concept of a "dynamic" catalyst to photochemistry that opens up a new approach toward understanding the complex mechanisms and kinetics in heterogeneous photocatalysis.

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“…a) showed the lowest band gap in STUWEPC 0.2 (2.8 eV), lower in STEPC 0.2 (2.9 eV), and higher in CPPC 0.2 (3.3 eV). This could be due to the stronger lattice distortion caused by electromagnetic radiation that has stimulated the narrowing of band gaps in STEPC and STUWEPC 0.2 , thereby enhancing the electron transition mobility with better absorption of lower‐frequency light energy . Again, lower photoluminescence (PL) intensity implies high separation rate and transfer efficiency of excitons (Fig.…”

Section: Resultsmentioning

confidence: 99%

Energy‐Efficient 2‐Ethylhexyl Acetate Synthesis with a Nano‐Sn‐Hydroxyapatite Photocatalyst

Mukhopadhyay

Chakraborty

2020

Chem Eng & Technol

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A nano‐tin oxide grafted natural‐hydroxyapatite photocatalyst was fabricated using a greener approach involving sequential application of solar‐type and ultrasound‐wave energy (STUWE). The protocol provided 76 % higher surface area, 59 % more surface acidity, and 15 % reduced band gap energy than conventionally prepared photocatalysts (CPPCs). The efficacy of the STUWE‐promoted photocatalyst (STUWEPC) was optimized for maximization of 2‐ethylhexyl acetate yield (97 %) employing an energy‐efficient solar‐type/ultrasound synergistic batch reactor. A considerably lower activation energy, estimated by Langmuir‐Hinshelwood kinetics, and higher reusability characteristics (upto 8 recycles) of the STUWEPC than CPPC highlights the superiority of the STUWE procedure.

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Ultrasonic-induced disorder engineering on ZnO, ZrO₂, Fe₂O₃ and SnO₂ nanocrystals

Abstract: Ultrasonic-induced disorder engineering was employed on ZnO, ZrO2, Fe2O3 and SnO2 nanocrystals to modify their photocatalytic performance.

Cited by 19 publications

References 45 publications

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Early-Stage Deactivation of Platinum-Loaded TiO₂ Using In Situ Photodeposition during Photocatalytic Hydrogen Evolution

Energy‐Efficient 2‐Ethylhexyl Acetate Synthesis with a Nano‐Sn‐Hydroxyapatite Photocatalyst

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Ultrasonic-induced disorder engineering on ZnO, ZrO2, Fe2O3 and SnO2 nanocrystals

Abstract: Ultrasonic-induced disorder engineering was employed on ZnO, ZrO2, Fe2O3 and SnO2 nanocrystals to modify their photocatalytic performance.

Cited by 19 publications

References 45 publications

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Evolution of surface topography and optical band gap of ZnO film deposited on NiO/Si(100)

Early-Stage Deactivation of Platinum-Loaded TiO2 Using In Situ Photodeposition during Photocatalytic Hydrogen Evolution

Energy‐Efficient 2‐Ethylhexyl Acetate Synthesis with a Nano‐Sn‐Hydroxyapatite Photocatalyst

Contact Info

Product

Resources

About

Ultrasonic-induced disorder engineering on ZnO, ZrO₂, Fe₂O₃ and SnO₂ nanocrystals

Early-Stage Deactivation of Platinum-Loaded TiO₂ Using In Situ Photodeposition during Photocatalytic Hydrogen Evolution