Details

Autor(en) / Beteiligte

• Lou, Zhengsong
• Chen, Qianwang
• Zhang, Yufeng
• Wang, Wei
• Qian, Yitai

Titel

Diamond Formation by Reduction of Carbon Dioxide at Low Temperatures

Ist Teil von

• Journal of the American Chemical Society, 2003-08, Vol.125 (31), p.9302-9303

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2003

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This Communication reports a low-temperature diamond synthesis technique, in which diamonds (10−250 μm) can form at a temperature as low as 440 °C by reduction of dense CO2 with metallic Na. The X-ray diffraction pattern of a powder sample shows three reflection peaks, indexed with 111, 220, and 311, corresponding unambiguously to cubic diamond. The Raman spectrum of the product exhibits an intense first-order peak at 1332 cm-1, which is the characteristic signature of the cubic diamond, indicating the formation of well-crystallized diamond. Carbon dioxide is a nontoxic low-energy molecule, abundant on earth. This novel reduction method could allow studies of large-size diamond growth using CO2 as the carbon source.