A study of the mechanically milled h-BN-H system |
| |
Authors: | Email author" target="_blank">P?WangEmail author S?Orimo H?Fujii |
| |
Institution: | (1) Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi, 739-8521 Hiroshima, Japan;(2) Department of Chemistry, University of Hawaii, 96822 Honolulu, HI, USA |
| |
Abstract: | Defective nanostructured h-BN, with different structural characteristics, can be prepared by mechanical milling under hydrogen and argon atmospheres. When h-BN was mechanically milled under a hydrogen atmosphere, hydrogen could be trapped by the B- and N-dangling bonds formed; the amount of which reached up to 2.6mass% after 80 h milling. The absorbed hydrogen can be released only as molecular hydrogen starting from about 570 K. As is clarified by a combination of TDS and IR measurements, the hydrogen detrapped from B–H and N–H bonds dominates the desorption at the lower and higher temperature ranges, respectively. After the nanostructured h-BN was heated to 1173 K, some of the hydrogen was still trapped by N–H bonds where, correspondingly, no recrystallization was detected. PACS 81.05.Tp; 61.46.+w; 81.20.Ev; 81.05.Zx |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|