caa a22 4500 388019328 CHVBK 20180307124919.0 cr unu---uuuuu 161130e199810 xx s 000 0 eng 10.1557/JMR.1998.0395 doi S0884291400046306 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0395 Annealing of mesoporous silica loaded with silver nanoparticles within its pores from isothermal sorption [Elektronische Daten] Influences of annealing on the structure of mesoporous silica loaded with silver (Ag) nanoparticles, and on the coarsening of Ag particles within pores of the host were investigated from isothermal sorption. Doping a small amount of Ag nanoparticles into pores of silica and subsequent annealing decreases the measured values of specific surface area and pore volume of porous silica significantly. This is attributed to the presence and coarsening of Ag particles within pores or channels between pores, which result in more and more isolated and unmeasured free spaces. The measured value of a specific surface area for the doped samples cannot represent the real value, which is, in fact, unable to be measured directly. During additional annealing, Ag particles within silica coarsen mainly according to the mechanism of formation of Ag adatoms on pore wall and diffusion of the adatoms along with pore walls. Only the larger particles located in the larger pores can continuously grow. The smaller particles and those located in the channels or pores with smaller dimension will disappear. The activation energy of the ripening process was estimated to be about 0.60 eV, and the migration barrier of Ag adatom on the pore wall of silica is about 0.10 eV. Copyright © Materials Research Society 1998 Cai Weiping Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China, and Institute of Advanced Study, University of Science and Technology of China, Hefei, People's Republic of China Zhang Lide Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China, and Institute of Advanced Study, University of Science and Technology of China, Hefei, People's Republic of China Zhong Huicai Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China He Guoliang Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China Journal of Materials Research Cambridge University Press 13/10(1998-10), 2888-2895 0884-2914 13:10<2888 1998 13 JMR https://doi.org/10.1557/JMR.1998.0395 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0395 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cai Weiping Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China, and Institute of Advanced Study, University of Science and Technology of China, Hefei, People's Republic of China NATIONALLICENCE 700 1- Zhang Lide Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China, and Institute of Advanced Study, University of Science and Technology of China, Hefei, People's Republic of China NATIONALLICENCE 700 1- Zhong Huicai Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China NATIONALLICENCE 700 1- He Guoliang Institute of Solid State Physics, Academia Sinica, Hefei 230031, People's Republic of China NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/10(1998-10), 2888-2895 0884-2914 13:10<2888 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge