Influence of Aging and Environment on Nanoparticle Chemistry: Implication to Confinement Effects in Nanoceria

被引：83

作者：

Kuchibhata, Satyanarayana V. N. T. ^{[1
,4
,6
]}

Karakoti, A. S. ^{[1
,4
]}

Baer, D. R. ^{[4
]}

Samudrala, S. ^{[1
,3
]}

Engelhard, M. H. ^{[4
]}

Amonette, J. E. ^{[5
]}

Thevuthasan, S. ^{[4
]}

Seal, S. ^{[1
,2
]}

机构：

[1] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA

[2] Univ Cent Florida, Nanosci & Technol Ctr, Orlando, FL 32816 USA

[3] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[4] EMSL, Richland, WA 99354 USA

[5] Pacific NW Natl Lab, Richland, WA 99354 USA

[6] Battelle Sci & Technol India, Pune 411057, Maharashtra, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 26期

关键词：

ULTRAVIOLET-ABSORPTION SPECTRA; OXIDE FUEL-CELLS; CEO2; NANOPARTICLES; HYDROGEN PEROXIDE; CERIA; CERIUM(IV); PARTICLES; OXIDATION; SYSTEM; ENERGY;

D O I：

10.1021/jp300725s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation state switching of cerium in cerium oxide nanoparticles is studied in detail. The influence of synthesis medium, aging time, and local environment on the oxidation state switching, between +3 and +4, is analyzed by tracking the absorption edge using UV-visible spectroscopy. It is observed that by tuning the local environment, the chemistry of the nanoparticles could be altered. These time-dependent, environmentally induced changes likely contribute to inconsistencies in the literature regarding quantum-confinement effects for ceria nanoparticles. The results in this Article indicate that there is a need to carry out comprehensive analysis of nanoparticles while considering the influence of synthesis and processing conditions, aging time and local environment.

引用

页码：14108 / 14114

页数：7

共 38 条

[1] Optimization of ionic conductivity in doped ceria [J].

Andersson, DA ;

Simak, SI ;

Skorodumova, NV ;

Abrikosov, IA ;

Johansson, B .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (10) :3518-3521

[2] Characterization challenges for nanomaterials [J].

Baer, D. R. ;

Amonette, J. E. ;

Engelhard, M. H. ;

Gaspar, D. J. ;

Karakoti, A. S. ;

Kuchibhatla, S. ;

Nachimuthu, P. ;

Nurmi, J. T. ;

Qiang, Y. ;

Sarathy, V. ;

Seal, S. ;

Sharma, A. ;

Tratnyek, P. G. ;

Wang, C. -M. .

SURFACE AND INTERFACE ANALYSIS, 2008, 40 (3-4) :529-537

[3] ACTIVATION ENERGY FOR DISPROPORTIONATION OF HO2 RADICAL IN ACID SOLUTIONS [J].

BIELSKI, BHJ ;

SAITO, E .

JOURNAL OF PHYSICAL CHEMISTRY, 1962, 66 (11) :2266-&

[4] The problem with determining atomic structure at the nanoscale [J].

Billinge, Simon J. L. ;

Levin, Igor .

SCIENCE, 2007, 316 (5824) :561-565

[5] Chemistry - Oxygen vacancies and catalysis on ceria surfaces [J].

Campbell, CT ;

Peden, CHF .

SCIENCE, 2005, 309 (5735) :713-714

[6] The effect of size-dependent nanoparticle energetics on catalyst sintering [J].

Campbell, CT ;

Parker, SC ;

Starr, DE .

SCIENCE, 2002, 298 (5594) :811-814

[7]

Candace S., 2006, SMALL TIMES MAGAZINE

[8]

Charles R., 1970, J POLYM SCI A, V8, P301

[9] Homogeneous precipitation of cerium dioxide nanoparticles in alcohol/water mixed solvents [J].

Chen, HI ;

Chang, HY .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2004, 242 (1-3) :61-69

[10] Rare earth nanoparticles prevent retinal degeneration induced by intracellular peroxides [J].

Chen, Junping ;

Patil, Swanand ;

Seal, Sudipta ;

McGinnis, James F. .

NATURE NANOTECHNOLOGY, 2006, 1 (02) :142-150

← 1 2 3 4 →