Catalyst Characterization with FESEM/EDX by the Example of Silver-Catalyzed Epoxidation of 1,3-Butadiene

Otto, T.N.; Habicht, W.; Dinjus, E.; Zimmerman, Michael A.

doi:10.5772/37952

Cited by 3 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, in all experiments the content of titanium decreases while the contents of carbon and fluoride gradually increase with applied voltage. It must be noted that depending on the material density and beam voltage (beam energy), the practical electron range (penetration depth) and the X-ray range during EDS measurements are different [ 56 ]. Based on the Anderson–Hasler equation [ 57 ], in the case of titanium oxide, the penetration depth at beam energy of 30 kV is 4.17 µm.…”

Section: Resultsmentioning

confidence: 99%

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

2023

View full text Add to dashboard Cite

In this research, we attempted to modify the bandgap of anodic titanium oxide by in situ incorporation of selected elements into the anodic titanium oxide during the titanium anodization process. The main aim of this research was to obtain photoactivity of anodic titanium oxide over a broader sunlight wavelength. The incorporation of the selected elements into the anodic titanium oxide was proved. It was shown that the bandgap values of anodic titanium oxides made at 60 V are in the visible region of sunlight. The smallest bandgap value was obtained for anodic titanium oxide modified by manganese, at 2.55 eV, which corresponds to a wavelength of 486.89 nm and blue color. Moreover, it was found that the pH of the electrolyte significantly affects the thickness of the anodic titanium oxide layer. The production of barrier oxides during the anodizing process with properties similar to coatings made by nitriding processes is reported for the first time.

show abstract

Section: Resultsmentioning

confidence: 99%

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

2023

View full text Add to dashboard Cite

show abstract

“…It can be explained by the porous structure of nanofiber mat which affects the penetration depth of electrons during EDX analysis [33]. It is known that depending on the polymer chemical nature and porosity of mat, a loss of Xrays can be occurred [34]. Also, P3ANA and PCL blended in a weight ratio of 25% w/w between two polymers.…”

Section: Morphological and Elemental Compositionmentioning

confidence: 99%

Electrochemical impedance and spectroscopy study of the EDC/NHS activation of the carboxyl groups on poly(ε-caprolactone)/poly(m-anthranilic acid) nanofibers

Guler¹,

Sarac²

2016

Express Polym. Lett.

View full text Add to dashboard Cite

Electrospun Ag-TiO₂ Nanofibers for Photocatalytic Glucose Conversion to High-Value Chemicals

et al. 2020

View full text Add to dashboard Cite

TiO 2 nanofibers were fabricated by combination of sol−gel and electrospinning techniques. Ag-doped TiO 2 nanofibers with different Ag contents were prepared by two different methods (in situ electrospinning or wetness impregnation of Ag on TiO 2 nanofibers) and heat treated at 500 °C for 2 h under an air or N 2 atmosphere. The obtained catalysts were characterized by field emission scanning electron microscopy, X-ray diffraction, photoluminescence, and N 2 adsorption analyzed by the Brunauer− Emmett−Teller (BET) method. Photocatalytic glucose conversions with electrospun TiO 2 and Ag-doped TiO 2 nanofibers for production of high-value products were carried out. From different doping methods, the results indicated that 1 wt % Ag-TiO 2 nanofibers prepared by an in situ method with calcination under N 2 achieved the highest glucose conversion (85.49%). From several Ag loading contents (i.e., 0, 1, 2, and 4 wt %) in Ag-doped TiO 2 nanofibers, the nanofibers exhibited different glucose conversions [in order of 2 wt % (99.65%) > 1 wt % (85.49%) > 4 wt % (77.72%) > 0 wt % (29.64%)]. Arabinose, xylitol, gluconic acid, and formic acid were found as the high-value chemicals with the photocatalytic reaction of TiO 2 and Ag-doped TiO 2 nanofibers under UVA irradiation. Product yields of each converted chemicals from different photocatalysts from different Ag loading contents showed relatively same trends with the glucose conversion. From all results, it can be concluded that the good characteristics of 2 wt % Ag-TiO 2 nanofibers such as the smallest anatase crystallite size (8.25 nm) and the highest specific surface area (S BET = 53.69 m 2 / g) promoted the highest photocatalytic activity. Additionally, TiO 2 and Ag-doped TiO 2 nanofibers exhibited higher photocatalytic performance for glucose conversion than commercial TiO 2 (P25) and synthesized TiO 2 nanoparticles. Finally, Ag-doped TiO 2 nanofibers showed recycling ability with high photocatalytic glucose conversion after four-time use.

show abstract

Catalyst Characterization with FESEM/EDX by the Example of Silver-Catalyzed Epoxidation of 1,3-Butadiene

Cited by 3 publications

References 14 publications

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

Electrochemical impedance and spectroscopy study of the EDC/NHS activation of the carboxyl groups on poly(ε-caprolactone)/poly(m-anthranilic acid) nanofibers

Electrospun Ag-TiO₂ Nanofibers for Photocatalytic Glucose Conversion to High-Value Chemicals

Contact Info

Product

Resources

About

Catalyst Characterization with FESEM/EDX by the Example of Silver-Catalyzed Epoxidation of 1,3-Butadiene

Cited by 3 publications

References 14 publications

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

Modification of Anodic Titanium Oxide Bandgap Energy by Incorporation of Tungsten, Molybdenum, and Manganese In Situ during Anodization

Electrochemical impedance and spectroscopy study of the EDC/NHS activation of the carboxyl groups on poly(ε-caprolactone)/poly(m-anthranilic acid) nanofibers

Electrospun Ag-TiO2 Nanofibers for Photocatalytic Glucose Conversion to High-Value Chemicals

Contact Info

Product

Resources

About

Electrospun Ag-TiO₂ Nanofibers for Photocatalytic Glucose Conversion to High-Value Chemicals