Photocatalytic degradation mechanisms of self-assembled rose-flower-like CeO2 hierarchical nanostructures

Sabari Arul, N.; Mangalaraj, D.; Whan Kim, Tae
June 2013
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p223115
Academic Journal
Hierarchical rose-flower-like CeO2 nanostructures were formed by using solvothermal and thermal annealing processes. The CeCO3OH thin film was transformed into CeO2 roses due to thermal annealing. CeO2 nanostructured roses exhibited excellent photocatalytic activity with a degradation rate of 65% for the azo dye acid orange 7 (AO7) under ultraviolet illumination. The fitting of the absorbance maximum versus time showed that the degradation of AO7 obeyed pseudo-first-order reaction kinetics. The enhancement of the photocatalytic activity for the CeO2 roses was attributed to the high adsorptivity resulting from the surface active sites and special 4f electron configuration.


Related Articles

  • Crystal structure and the magnetic state of Pr0.5Sr0.5Co0.5Fe0.5O3. Troyanchuk, I. O.; Karpinsky, D. V.; Efimov, V. V.; Efimova, E.; Sikolenko, V.; Yusupov, R. // JETP Letters;May2008, Vol. 87 Issue 6, p306 

    The magnetic properties and crystal structure of the Pr0.5Sr0.5Co0.5Fe0.5O3 compound are studied by neutron and x-ray diffractions using synchrotron radiation. These measurements show that this compound is a dielectric spin glass with a magnetic moment freezing temperature of about 70 K. As...

  • Metal-insulator transition in low dimensional La0.75Sr0.25VO3 thin films. Dao, Tran M.; Mondal, Partha S.; Takamura, Y.; Arenholz, E.; Lee, Jaichan // Applied Physics Letters;9/12/2011, Vol. 99 Issue 11, p112111 

    We report on the metal-insulator transition that occurs as a function of film thickness in ultrathin La0.75Sr0.25VO3 films. The metal-insulator transition displays a critical thickness of 5 unit cell. Above the critical thickness, metallic films exhibit a temperature driven metal-insulator...

  • Hund�s multiplicity rule: a unified interpretation. Liu, Shubin; Langenaeker, Wilfried // Theoretical Chemistry Accounts: Theory, Computation, & Modeling;Dec2003, Vol. 110 Issue 5, p338 

    Hund�s multiplicity rule, stating that a higher spin state has a lower energy within the same electron configuration, is empirical but has shown to be valid for both atoms and molecules. Several theoretical interpretations for its validity, including explanations in terms of the lower...

  • Nonvariational time-dependent multiconfiguration self-consistent field equations for electronic dynamics in laser-driven molecules. Nguyen-Dang, T. Tung; Peters, Michel; Sen-Ming Wang; Sinelnikov, Evgueni; Dion, François // Journal of Chemical Physics;11/7/2007, Vol. 127 Issue 17, p174107 

    A time-dependent multiconfiguration self-consistent field (TDMCSCF) scheme is developed to describe the time-resolved electron dynamics of a laser-driven many-electron atomic or molecular system, starting directly from the time-dependent Schrödinger equation for the system. This...

  • Nuclear magnetic shielding constants of liquid water: Insights from hybrid quantum mechanics/molecular mechanics models. Kongsted, Jacob; Nielsen, Christian B.; Mikkelsen, Kurt V.; Christiansen, Ove; Ruud, Kenneth // Journal of Chemical Physics;1/21/2007, Vol. 126 Issue 3, p034510 

    We present a gauge-origin independent method for the calculation of nuclear magnetic shielding tensors of molecules in a structured and polarizable environment. The method is based on a combination of density functional theory (DFT) or Hartree-Fock wave functions with molecular mechanics. The...

  • Intramolecular rearrangements of β-diketonates of metals. A non-emprical study of the structure of Y(MDA)3 and La(MDA)3 complexes. Sliznev, V.; Lapshina, S. // Journal of Structural Chemistry;May2007, Vol. 48 Issue 3, p417 

    The structure of tris-complexes of yttrium and lanthanum with malonic dialdehyde (MDA = C3O2H3) is studied by a non-empirical Hartree-Fock method and also with taking into account the electron correlation by the second order Möller-Plesset perturbation theory using the effective...

  • The cumulant two-particle reduced density matrix as a measure of electron correlation and entanglement. Juhász, Tamás; Mazziotti, David A. // Journal of Chemical Physics;11/7/2006, Vol. 125 Issue 17, p174105 

    Several measures of electron correlation are compared based on two criteria: (i) the presence of a unique mapping between the reduced variables in the measure and the many-electron wave function and (ii) the linear scaling of the measure and its variables with system size. We propose the squared...

  • Accurate ab initio potential energy curve of O2. II. Core-valence correlations, relativistic contributions, and vibration-rotation spectrum. Bytautas, Laimutis; Matsunaga, Nikita; Ruedenberg, Klaus // Journal of Chemical Physics;2/21/2010, Vol. 132 Issue 7, p074307 

    In the first paper of this series, a very accurate ab initio potential energy curve of the 3Σg- ground state of O2 has been determined in the approximation that all valence shell electron correlations were calculated at the complete basis set limit. In the present study, the corrections...

  • Electronic energy levels with the help of trajectory-guided random grid of coupled wave packets. I. Six-dimensional simulation of H2. Shalashilin, Dmitrii V.; Child, Mark S. // Journal of Chemical Physics;6/8/2005, Vol. 122 Issue 22, p224108 

    As a preliminary to future work on the behavior of atoms and molecules in strong time-dependent fields, we apply the coupled coherent-states (CCS) technique of multidimensional phase-space quantum dynamics to obtain Born–Oppenheimer energy levels of electrons in molecules. Unlike...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics