Background: The fluoride volatility process has been developed to recover uranium from spent nuclear fuel. And the fluoride adsorption technique is usually applied in the purification and collection of UF6 during the fluoride volatility process. Purpose: This study aims to investigate the characteristics and sorption performance of a novel sorbent CeO2/NaF synthesized by doping NaF with CeF3. Methods: With polymer sodium carboxymethyl cellulose (CMC) as a binder and pore-forming agent

CeF3 and NaF was mixed according to a mass ratio of 4:9:62

and then water were added (the ratio of CMC to water is 1:6). The porous CeO2/NaF adsorbent particles were prepared by a mixing

molding and sintering process. The characteristics and adsorption performance of the adsorbent particles were analyzed and characterized. Results: Specific surface area of CeO2/NaF was (0.84±0.04)m2·g?1

which was twice of NaF sorbent made under the same process. Porosity was 42.2%

which was larger than that of NaF sorbent. The initial adsorption rate of MoF6 on CeO2/NaF was much higher than that of NaF sorbent. The temperature zone for desorption of MoF6 from CeO2/NaF ranged from 150°C to 300°C

while there were two desorption zones for desorption of MoF6 from NaF sorbent

which varied from 100°C to 300°C and 350°C to 400°C

respectively. This phenomenon showed that CeO2 might stabilize Mo6+ in MoF6. Conclusion: The physical properties of NaF could be changed by doping with CeO2

and its adsorption performance was also improved. Abstract