Photocatalytic Reactivity of Carbon–Nitrogen–Sulfur-Doped TiO2 Upconversion Phosphor Composites

Eun, Seong-Rak; Mavengere, Shielah; Cho, Bumrae; Kim, Jung-Sik

doi:10.3390/catal10101188

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…The absorption bands at 3421 and 1575 cm –1 were assigned to the stretching vibrations of the O–H and CO groups, respectively . The band at 699 and 1120 cm –1 were associated with the stretching vibrations of the C–S and SO bonds, respectively . Raman spectroscopy was applied to complement our insights into the phase structure (Figure b).…”

Section: Results and Discussionmentioning

confidence: 99%

Fabrication of Superamphiphilic Carbon Using Lignosulfonate for Enhancing Selective Hydrogenation Reactions in Pickering Emulsions

Fan

Zhang

Hou

et al. 2021

ACS Appl. Mater. Interfaces

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Superamphiphilic materials have great potential to enhance the mass transfer between phases in liquid–liquid catalysis due to their special affinities. Constructing superamphiphilic surfaces that possess superhydrophilic and superhydrophobic properties simultaneously has been a tough assignment. So, exploration of simple methods to prepare such materials using renewable and abundant feedstocks is highly desired. Here, we reported an effective strategy to construct superamphiphilic carbon directly from sodium lignosulfonate, which is a renewable resource from paper industry wastes. From the characterization of X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) for superamphiphilic carbon, we found that element C was responsible for the hydrophobic nature and the existence of O and S endowed the carbon with hydrophilic characteristics. Further, micro/nanohierarchical pores were found beneficial for the superamphiphilicity of carbon. Meantime, in the selective hydrogenation of styrene, phenylacetylene, and cis-stilbene in liquid–liquid systems, conversion became double using superamphiphilic carbon compared with blank results, and the yields were three times more than those in blank experiments. The reasons were that superamphiphilic carbon induced the formation of Pickering emulsions and enriched the reactants around catalysts, as concluded by the characterization of confocal laser scanning microscopy and relating contrastive experiments. This work revealed a different route to obtain superamphiphilic carbon and provided a diverse perspective to promote Pickering emulsion catalysis by the superamphiphilicity of carbon.

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Section: Results and Discussionmentioning

confidence: 99%

Fabrication of Superamphiphilic Carbon Using Lignosulfonate for Enhancing Selective Hydrogenation Reactions in Pickering Emulsions

Fan

Zhang

Hou

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In the study of Eun et al [5], sol-gel-synthesized N-doped and carbon-nitrogensulfur (CNS)-doped TiO 2 solutions were deposited on upconversion phosphor using a dip-coating method. Scanning electron microscopy (SEM) imaging showed that there was a change in the morphology of TiO 2 coated on NaYF 4 :Yb,Er from spherical to nanorods caused by additional urea and thiourea doping reagents.…”

Section: Tio 2 -Based Photocatalystsmentioning

confidence: 99%