Synthesis and Characterization of Ultra-fine Cr2O3 from Hydrogen Reduction of K2CrO4

武汉理工大学学报-材料科学版(英文版), 2008, 23(2): 181-183.

^1, , ^2, , ^3, , ^4,

1.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

2.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

3.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

4.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

基金项目: 国家自然科学基金(50234040) 中国科学院基金(082813) 国家重点基础研究发展计划(973计划)(2007CB613500) the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period(2006BAC02A05)

Synthesis and Characterization of Ultra-fine Cr2O3 from Hydrogen Reduction of K2CrO4

BAI Yulan ^1, , XU Hongbin ^2, , ZHANG Yi ^3, , LI Zuohu ^4,

1.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

2.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

3.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

4.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

Keywords： hydrogen reduction

As a part of the green process for manufacturing chromium compounds, two steps are involved in the synthesis of ultra-fine Cr2O3 powders: the first is the hydrogen reduction of K2CrO4 into intermediate trivalent (Cr3+) or tetravalent (Cr4+) chromium compounds; the second is the decomposing of the intermediate into Cr2O36 by heat treating. The intermediate is well characterized by means of SEM, XRD, and XPS. The possible reaction mechanism of the process is analyzed.

参考文献

[1]	L.F.Liotta;A.M.Venezia;G.Pantaleo;G.Deganello;R.Noto .Chromia on silica and zirconia oxides as recyclable oxidizing system:structural and surface characterization of the active chromium species for oxidation reaction[J].Catalysis Today,2004(0):231-236.
[2]	Fountzoula C.;Papadopoulou C.;Voyiatzis GA.;Kordulis C.;Matralis HK. .THE INFLUENCE OF THE CHROMIUM CONTENT ON THE PHYSICOCHEMICAL PROPERTIES AND THE CATALYTIC BEHAVIOR OF CROX/TIO2 CATALYSTS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITRIC OXIDE BY AMMONIA AT RELATIVELY HIGH TEMPERATURES[J].Journal of Catalysis,1997(2):391-405.
[3]	Trunschke A.;Radnik J.;Lieske H.;Hoang DL. .Influence of lanthana on the nature of surface chromium species in La2O3-modified CrOx/ZrO2 catalysts[J].Journal of Catalysis,2000(2):456-466.
[4]	Balachandran U;Siegel R W;Liao Y X et al.Synthesis,Sintering,and Magnetic Properties of Nanophase Cr2O3[J].Nano-Structured Materials,1995,5(05):505-512.
[5]	Vollath D;Szabó D V;Willis J O .Magnetic Properties of Nanoerystalline Cr2O3 Synthesized in a Microwave Plasma[J].Materials Letters,1996,29(4-6):271-279.
[6]	Zhu Y J;Qian Y T;Zhang M W .γ-Radiation-Synthesis of Nanometer-size Amorphous Cr2O3 Powders at Room Temperature[J].Materials Science and Engineering B,1996,41(02):294-296.
[7]	Zhong ZC.;Bosley J.;Dowben PA.;Sellmyer DJ.;Cheng RH. .Fabrication of chromium oxide nanoparticles by laser-induced deposition from solution[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2001(3/4):196-200.
[8]	Peters G.;Schramm B.;Jerg K. .Characterization of chromium (III) oxide powders prepared by laser-induced pyrolysis of chromyl chloride[J].Materials Chemistry and Physics,1998(3):197-201.
[9]	Nikumbh A K;Rahman M M;Aware A D .A Study of the Thermal DecOmposition of Chromium(Ⅱ) Oxalate Dihydrate Using Direct Current Electrical Conductivity Measurements[J].Thermochimica Acta,1990,159:109-123.
[10]	Tsuzuki T;Mccormick P G .Synthesis of Cr2O3 Nanoparticles by Mechanochemieal Processing[J].Acta Materialia,2000,48(11):2795-2891.
[11]	Yi Zhang;Zuo-Hu Li;Too Qi;Shi-Li Zheng;Hui-Quan Li;Hong-Bin Xu .Green Manufacturing Process of Chromium Compounds[J].Environmental Progress,2005(1):44-50.
[12]	H.-B. Xu;S.-L. Zheng;Y. Zhang .Oxidative leaching of a Vietnamese chromite ore in highly concentrated potassium hydroxide aqueous solution at 300 deg C and atmospheric pressure[J].Minerals Engineering,2005(5):527-535.
[13]	Xu H B;Zhang Y;Li Z H et al.Development of a New Cleaner Production Process for Producing Chromic Oxide from Chromite Ore[J].Journal of Cleaner Production,2005,14(02):211-219.
[14]	Xu H B;Bai Y L;Zhang Y et al.The Method for Preparation of Chromium Oxide by Reducing the Chromate with Hydrogen[P].CN 200510089010.8,2005.
[15]	Sung Dae Yim;In-Sik Nam .Characteristics of chromium oxides supported on TiO_2 and Al_2O_3 for the decomposition of perchloroethylene[J].Journal of Catalysis,2004(2):601-611.
[16]	Rao Jampani Madhusudana .A Comparative Study of Bulk and Supported Chromia Catalysts for the Fluorination of Trichloroethylene[J].Journal of Catalysis,1999(1):105-111.
[17]	Boping Liu;Minoru Terano .Investigation of the physico-chemical state and aggregation mechanism of surface Cr species on a Phillips CrO_x/SiO_2 catalyst by XPS and EPMA[J].Journal of molecular catalysis, A. Chemical,2001(1/2):227-240.
[18]	Lin X;Su W;Lu Z et al.Mixed Valence State and Electrical Conductivity of La1-xSrxCrO3[J].Journal of Alloys and Compounds,2006,305(1-2):21-23.
[19]	A. Machet;A. Galtayries;S. Zanna;L. Klein;V. Maurice;P. Jolivet;M. Foucault;P. Combrade;P. Scott;P. Marcus .XPS and STM study of the growth and structure of passive films in high temperature water on a nickel-base alloy[J].Electrochimica Acta,2004(22/23):3957-3964.
[20]	D.L.Hoang;A.Dittmar;J.Radnik;K.-W.Brzezinka;K.Witke .Redox behaviour of La-Cr compounds formed in CrO_x/La_2O_3 mixed oxides and CrO_x/La_2O_3/ZrO_2 catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(1/2):95-110.

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