%0 Journal Article %1 WOS:000412609200045 %A Marques, Thalles M F %A Strayer, Megan E %A Ghosh, Anupama %A Silva, Alexandre %A Ferreira, Odair P %A Fujisawa, Kazunori %A da Cunha, Jose Alves R %A Abreu, Guilherme J P %A Terrones, Mauricio %A Mallouk, Thomas E %A Viana, Bartolomeu C %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND %D 2017 %I PERGAMON-ELSEVIER SCIENCE LTD %J JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS %K CeO2 Hybrid Support decoration; nanopartcles; nanosheet; nanosystem} {Hexaniobate %P 335-342 %R 10.1016/j.jpcs.2017.08.027 %T Homogeneously dispersed dispersed CeO2 nanoparticles on exfoliated hexaniobate nanosheets %V 111 %X Hexaniobate nanosheets derived from the parent compound K4Nb6O17 have been decorated with CeO2 nano particles by ion exchange with aqueous cerium (IV) solution. Very homogeneous CeO2 nanoparticle decoration of the hexaniobate sheets can be achieved by this method and the resulting composites may absorb visible light. HRTEM images show that similar to 3.0 nm diameter CeO2 nanoparticles adhere to hexaniobate nanosheets that are exfoliated and then restacked prior to Ce deposition. The interfacial interaction between CeO2 nanoparticles and nanosheets would be due to an electrostatic attraction mechanism. Raman and XRD measurements have given strong evidence that CeO2 nanoparticles have fluorite structure. EDS, FTIR and XPS results suggest almost complete exchange of TBA(+) and K+ by Ce4+. Cerium ion exchange on the acid exchanged parent compound, H2.9K1.1Nb6O17, revealed that the extent of Ce ion exchange is much greater in case of nanosheets, which may be rationalized by the larger surface area available after exfoliation. XPS measurements show that the ratio of Ce4+/Ce3+ is around 4.4, in agreement with the formation of fluorite structure (CeO2). Thus, these CeO2 nanoparticle/nanosheet composites may be useful for catalytic processes.

@article{WOS:000412609200045, abstract = {Hexaniobate nanosheets derived from the parent compound K4Nb6O17 have been decorated with CeO2 nano particles by ion exchange with aqueous cerium (IV) solution. Very homogeneous CeO2 nanoparticle decoration of the hexaniobate sheets can be achieved by this method and the resulting composites may absorb visible light. HRTEM images show that similar to 3.0 nm diameter CeO2 nanoparticles adhere to hexaniobate nanosheets that are exfoliated and then restacked prior to Ce deposition. The interfacial interaction between CeO2 nanoparticles and nanosheets would be due to an electrostatic attraction mechanism. Raman and XRD measurements have given strong evidence that CeO2 nanoparticles have fluorite structure. EDS, FTIR and XPS results suggest almost complete exchange of TBA(+) and K+ by Ce4+. Cerium ion exchange on the acid exchanged parent compound, H2.9K1.1Nb6O17, revealed that the extent of Ce ion exchange is much greater in case of nanosheets, which may be rationalized by the larger surface area available after exfoliation. XPS measurements show that the ratio of Ce4+/Ce3+ is around 4.4, in agreement with the formation of fluorite structure (CeO2). Thus, these CeO2 nanoparticle/nanosheet composites may be useful for catalytic processes.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, author = {Marques, Thalles M F and Strayer, Megan E and Ghosh, Anupama and Silva, Alexandre and Ferreira, Odair P and Fujisawa, Kazunori and da Cunha, Jose Alves R and Abreu, Guilherme J P and Terrones, Mauricio and Mallouk, Thomas E and Viana, Bartolomeu C}, biburl = {https://www.bibsonomy.org/bibtex/2cd5cdf36a571fcc21b19e0febb67e3e2/ppgfis_ufc_br}, doi = {10.1016/j.jpcs.2017.08.027}, interhash = {8f0425262735cd67ecfdf3dd746589fa}, intrahash = {cd5cdf36a571fcc21b19e0febb67e3e2}, issn = {0022-3697}, journal = {JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS}, keywords = {CeO2 Hybrid Support decoration; nanopartcles; nanosheet; nanosystem} {Hexaniobate}, pages = {335-342}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Homogeneously dispersed dispersed CeO2 nanoparticles on exfoliated hexaniobate nanosheets}, tppubtype = {article}, volume = 111, year = 2017 }