Abstract
We had first synthesized hexagonal 2H-CuCrO2 nanocrystals by hydrothermal method. The stability diagram for Cu–Cr–Na–H2O system allows preparing of nanocrystalline CuCrO2, either 2H or 3R pure phase, by a single step, low-temperature hydrothermal synthesis. 2H- and 3R-CuCrO2 quasi-hexagonal shape nanocrystals have shown a wide range of size distribution varying from about 20 to 40 nm. An unexpected result is that 2H-CuCrO2 phase was a low temperature phase in the hydrothermal synthesis. Also, a formation mechanism for the synthesis of CuCrO2 nanocrystal, 2H- and 3R-polytypes was proposed.
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References
Beverskog B, Puigdomenech I (1997a) Revised Pourbaix diagrams for copper at 25–300 °C. J Electrochem Soc 144:3476–3483
Beverskog B, Puigdomenech I (1997b) Revised Pourbaix diagrams for chromium at 25–300 °C. Corros Sci 39:43–57
Crottaz O, Kubel F, Schmid H (1996) Preparation of trigonal and hexagonal cuprous chromite and phase transition study based on single crystal structure data. J Solid State Chem 122:247–250
Kawazoe H, Yasukawa M, Hyodo H, Kurita M, Yanagi H, Hosono H (1997) P-type electrical conduction in transparent thin films of CuAlO2. Nature 389:939–942
Kumar S, Marinel S, Miclau M, Martin C (2012) Fast synthesis of CuCrO2 delafossite by monomode microwave heating. Mater Lett 70:40–43
Marquardt MA, Ashmore NA, Cann DP (2006) Crystal chemistry and electrical properties of the delafossite structure. Thin Solid Films 496:146–151
Monnier JR, Hanrahan MJ, Apai GA (1985) Study of the catalytically active copper species in the synthesis of methanol over Cu–Cr Oxide. J Catal 92:119–126
Nazri GA, Thackeray M, Ohzuku T (2000) Intercalation compounds for battery materials. The Electrochemical Society, Inc., Pennington
Rodriguez-Carvajal J (1993) Recent advances in magnetic structure determination by neutron powder diffraction. J Phys B 192:55–69
Sharma PA, Sugar JD, Medlin DL (2010) Influence of nanostructuring and heterogeneous nucleation on the thermoelectric figure of merit in AgSbTe2. J Appl Phys 107:113716–113724
Sheets WC, Mugnier E, Barnabé A, Marks TJ, Poeppelmeier KR (2006) Hydrothermal synthesis of delafossite-type oxides. Chem Mater 18:7–20
Singh K, Maignan A, Martin C, Simon C (2009) AgCrS2: a spin driven ferroelectric. Chem Mater 21:5007–5009
Van Tendeloo G, Garlea O, Darie C, Bougerol-Chaillout C, Bordet P (2001) The fine structure of YCuO2+x delafossite determined by synchrotron powder diffraction and electron microscopy. J Solid State Chem 156:428–436
Xu H, Lou T, Li Y (2004) Synthesis and characterize of trivalent chromium Cr(OH)3 and Cr2O3 microspheres. I Inorg Chem Commun 7:666–668
Yanagi H, Hase T, Ibuki S, Ueda K, Hosono H (2001) Bipolarity in electrical conduction of transparent oxide semiconductor CuInO2 with delafossite structure. Appl Phys Lett 78:1583–1585
Yoshimura M, Byrappa K (2008) Hydrothermal processing of materials: past, present and future. J Mater Sci 43:2085–2103
Zhou S, Fang X, Deng Z, Li D, Dong W, Tao R, Meng G, Wang T, Zhu X (2008) Hydrothermal synthesis and characterization of CuCrO2 laminar nanocrystals. J Cryst Growth 310:5375–5379
Acknowledgments
This study was supported by the strategic grant POSDRU ID77265 (2010), co-financed by the European Social Fund-Investing in People, within the Sectorial Operational Programme Human Resources Development 2007–2013 and Initial Training Network SOPRANO 214040, supported by the EU Seventh Framework Programme.
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Miclau, M., Ursu, D., Kumar, S. et al. Hexagonal polytype of CuCrO2 nanocrystals obtained by hydrothermal method. J Nanopart Res 14, 1110 (2012). https://doi.org/10.1007/s11051-012-1110-3
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DOI: https://doi.org/10.1007/s11051-012-1110-3