A novel carbothermal reduction nitridation route to MoN nanoparticles on CNTs support

作者：Yao Zhiwei; Zhang Xiaohong; Peng Feng^*; Yu Hao; Wang Hongjuan; Yang Jian

来源：Journal of Materials Chemistry, 2011, 21(19): 6898-6902.

DOI：10.1039/c1jm10833f

• Carbothermal nitridation
• Carbothermal reduction nitridation
• Heating method
• Mixture phase
• Nitridation reaction
• Size ranges
• Temperature programmed

MoN nanoparticles in a size range around 50 nm were obtained on CNTs support via a novel carbothermal reduction nitridation (CRN). For the first time, a common (NH(4))(6)Mo(7)O(24)center dot 4H(2)O can be used as a Mo source to prepare MoN nanoparticles. A Mo-containing precursor was in a first step carburized and was reduced to a MoO(x)C(y)/Mo mixture. During further carbothermal nitridation this mixture-phase was shifted to the MoN phase through either a Mo(2)C or MoO(x)N(y) intermediate. Compared with the conventional NH(3)-temperature-programmed treatment (TPT) route that produced Mo nitride from MoO(2) with rigorous heating method, the CRN route favored the formation of Mo nitride from easily nitridable MoO(x)C(y)/Mo, MoO(x)N(y) and Mo(2)C intermediates. The phase structure of the Mo nitride product was greatly dependent on nitridation reaction pathway. The NH(3)-TPT route yielded cubic Mo(2)N, while the CRN process produced hexagonal MoN.

• 单位
  华南理工大学