%0 Journal Article
%T INVESTIGATION ON THE VALENCE STATE OF Ce ATOM IN BULK AND NANOCRYSTAL CeO2 BY X-RAY ABSORPTION AND PHOTOEMISSION<br>INVESTIGATION ON THE VALENCE STATE OF Ce ATOMIN BULK AND NANOCRYSTAL CeO_2 BY X-RAY ABSORPTION ANDPHOTOEMISSION
%A K Ibrahim
%A <br>K. Ibrahim
%A Z.Y. Wu
%A J. Zhang
%A M.I. Abbas
%A F.Q. Liu and H.J. Qian
%J 金属学报(英文版)
%D 2001
%I 
%X Valence band photoemission spectra (PES) for both bulk and nanocrystal CeO2 have been measured on and off resonance of Ce 4d-4f absorption edge. The PES show that the bulk and nanocrystal CeO2 of diameter ranging from 8nm to 50nm exhibit a peak near Fermi edge with binding energy of about 1.8eV. The 1.8eV peak shows a strong dependence on excitation energy, although it looks like the contribution of Ce3+ ion following the data reported in literatures. However, according to the results of resonance photoemission and X-ray absorption spectra at 1s edge, this electronic structure may be associated to the intermediate state charge transfer effects.
%K rare earth oxide
%K photoemission
%K electronic structure
%K photoabsorption<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=24AA60BFDBBD5618197D9E60DC87C718&yid=14E7EF987E4155E6&vid=F3583C8E78166B9E&iid=B31275AF3241DB2D&sid=B99A53AADE50D922&eid=AF0641F74554D706&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=16