Improve the catalytic activity of α-Fe2O3 particles in decomposition of ammonium perchlorate by coating amorphous carbon on their surface
✍ Scribed by Yifu Zhang; Xinghai Liu; Jiaorong Nie; Lei Yu; Yalan Zhong; Chi Huang
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 633 KB
- Volume
- 184
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
Sphere-and pod-like a-Fe 2 O 3 particles have been selectively synthesized using NH 3 Á H 2 O and NaOH solution to adjust the pH value of the designed synthetic system, respectively. The sphere-like a-Fe 2 O 3 particles with diameter about 25 nm on average were encapsulated into carbon shells to fabricate a novel core-shell composite (a-Fe 2 O 3 @C) through the coating experiments. The catalytic performance of the products on the thermal decomposition of ammonium perchlorate (AP) was investigated by thermal gravimetric analyzer (TG) and differential thermal analysis (DTA). The thermal decomposition temperatures of AP in the presence of podlike a-Fe 2 O 3 , sphere-like a-Fe 2 O 3 and a-Fe 2 O 3 @C are reduced by 72, 81 and 109 1C, respectively, which show that a-Fe 2 O 3 @C core-shell composites have higher catalytic activity than that of a-Fe 2 O 3 .