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Two‐step Synthesis of MoS 2 Nanotubes using Shock Waves with Lead as Growth Promoter
Author(s) -
Brontvein Olga,
Jayaram Vishakantaiah,
Reddy K. P. J.,
Gordon Jeffrey M.,
Tenne Reshef
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300329
Subject(s) - materials science , nanotube , molybdenum , nanotechnology , nanostructure , suboxide , one step , argon , chemical engineering , oxide , carbon nanotube , chemistry , organic chemistry , metallurgy , engineering
Abstract A new two‐step procedure for the synthesis of MoS 2 nanotubes using lead as a growth promoter is reported. In the first step, molybdenum suboxide nanowhiskers containing a small amount of lead atoms were created by exposing a pressed MoS 2 +Pb mixture to highly compressed shock‐heated argon gas, with estimated temperatures exceeding 9900 K. In the second step, these molybdenum suboxide nanowhiskers served as templates for the sulfidization of the oxide into MoS 2 nanotubes (by using H 2 S gas in a reducing atmosphere at 820 °C). Unlike the case of WS 2 nanotubes, the synthesis of a pure phase of MoS 2 nanotubes from molybdenum oxide has proven challenging, due mostly to the volatile nature of the latter at the high requisite reaction temperatures (>800 °C). In contrast, the nature and apparent reaction mechanism of the method reported herein are amenable to future scale‐up. The high‐temperature shockwave system should also facilitate the synthesis of new nanostructures from other layered materials.