Shape-controlled synthesis of nanocubic Co3O4 by hydrothermal oxidation method
The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent, surfactant, solvent, pH value of the suspension and the amount of oxidant H2O2 on the morphology and structure of Co3O4 were investigated. The Co3O4 powders were characterized by tr...
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| Published in | Transactions of Nonferrous Metals Society of China Vol. 17; no. 5; pp. 1082 - 1086 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
01.10.2007
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1003-6326 |
| DOI | 10.1016/S1003-6326(07)60229-5 |
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| Abstract | The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent, surfactant, solvent, pH value of the suspension and the amount of oxidant H2O2 on the morphology and structure of Co3O4 were investigated. The Co3O4 powders were characterized by transmission electron microscope and X-my diffraction. The results show that the morphology of Co3O4 is closely dependant on the anion in cobalt salts, but it is not so sensitive to the precipitating agents and solvents. The amount of H2O2 is the key factor to obtain Co3O4 with spinel crystal structure. The optimum synthetic conditions of uniform shape-controlled Co3O4 nanocubes are as follows： Co（CH3COO）2·4H2O as cobalt salt, KOH as precipitating agent, polyethylene glycol with relative molecular mass of about 20 000 as surfactant, water-n-butanol as solvent system, pH value of 8-9, the molar ratio of H2O2 to Co^2＋ above 2.5：1.0, hydrothermal temperature of 160 ℃ and hydrothermal holding time of 10 h. The tap density and apparent density of nanocubic Co3O4 obtained with the average particle size of 20 nm are 1.01 g/cm^3 and 0.70 g/cm^3, respectively. |
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| AbstractList | The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent, surfactant, solvent, pH value of the suspension and the amount of oxidant H2O2 on the morphology and structure of Co3O4 were investigated. The Co3O4 powders were characterized by transmission electron microscope and X-my diffraction. The results show that the morphology of Co3O4 is closely dependant on the anion in cobalt salts, but it is not so sensitive to the precipitating agents and solvents. The amount of H2O2 is the key factor to obtain Co3O4 with spinel crystal structure. The optimum synthetic conditions of uniform shape-controlled Co3O4 nanocubes are as follows： Co（CH3COO）2·4H2O as cobalt salt, KOH as precipitating agent, polyethylene glycol with relative molecular mass of about 20 000 as surfactant, water-n-butanol as solvent system, pH value of 8-9, the molar ratio of H2O2 to Co^2＋ above 2.5：1.0, hydrothermal temperature of 160 ℃ and hydrothermal holding time of 10 h. The tap density and apparent density of nanocubic Co3O4 obtained with the average particle size of 20 nm are 1.01 g/cm^3 and 0.70 g/cm^3, respectively. The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent, surfactant, solvent, pH value of the suspension and the amount of oxidant H2O2 on the morphology and structure of Co3O4 were investigated. The Co3O4 powders were characterized by transmission electron microscope and X-ray diffraction. The results show that the morphology of Co3O4 is closely dependant on the anion in cobalt salts, but it is not so sensitive to the precipitating agents and solvents. The amount of H2O2 is the key factor to obtain Co3O4 with spinel crystal structure. The optimum synthetic conditions of uniform shape-controlled Co3O4 nanocubes are as follows: Co(CH3COO)2 * 4H2O as cobalt salt, KOH as precipitating agent, polyethylene glycol with relative molecular mass of about 20000 as surfactant, water-n-butanol as solvent system, pH value of 8-9, the molar ratio of H2O2 to Co2+ above 2.5:1.0, hydrothermal temperature of 160 deg C and hydrothermal holding time of 10 h. The tap density and apparent density of nanocubic Co3O4 obtained with the average particle size of 20 nm are 1.01 g/cm3 and 0.70 g/cm3, respectively. TG1; The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent,surfactant, solvent, pH value of the suspension and the amount of oxidant H2O2 on the morphology and structure of Co3O4 were investigated. The Co3O4 powders were characterized by transmission electron microscope and X-ray diffraction. The results show that the morphology of Co3O4 is closely dependant on the anion in cobalt salts, but it is not so sensitive to the precipitating agents and solvents. The amount of H2O2 is the key factor to obtain Co3O4 with spinel crystal structure. The optimum synthetic conditions of uniform shape-controlled Co3O4 nanocubes are as follows: Co(CH3COO)2·4H2O as cobalt salt, KOH as precipitating agent,polyethylene glycol with relative molecular mass of about 20 000 as surfactant, water-n-butanol as solvent system, pH value of 8-9,the molar ratio of H2O2 to Co2+ above 2.5:1.0, hydrothermal temperature of 160 ℃ and hydrothermal holding time of 10 h. The tap density and apparent density of nanocubic Co3O4 obtained with the average particle size of 20 nm are 1.01 g/cm3 and 0.70 g/cm3,respectively. |
| Author | 杨幼平 黄可龙 刘人生 王丽平 曾雯雯 张平民 |
| AuthorAffiliation | School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| Cites_doi | 10.1016/0013-4686(95)00238-A 10.1016/S0254-0584(02)00442-X 10.1002/adfm.200400429 10.1007/s10562-004-3750-0 10.1016/S0378-7753(02)00052-6 10.1016/j.jmmm.2003.12.377 10.1021/jp050725v 10.1016/j.apsusc.2005.09.004 10.1016/S0254-0584(01)00463-1 10.1016/j.apcatb.2004.06.001 |
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| References | WANG (10.1016/S1003-6326(07)60229-5_bib3) 2002; 109 WANG (10.1016/S1003-6326(07)60229-5_bib1) 2005; 101 LI (10.1016/S1003-6326(07)60229-5_bib5) 2005; 15 SHINDE (10.1016/S1003-6326(07)60229-5_bib15) 2006; 252 LIAO (10.1016/S1003-6326(07)60229-5_bib8) 2004; 14 BAHLAWANE (10.1016/S1003-6326(07)60229-5_bib13) 2004; 53 JIANG (10.1016/S1003-6326(07)60229-5_bib11) 2002; 74 CAO (10.1016/S1003-6326(07)60229-5_bib9) 2003; 10 ICHIYANAGI (10.1016/S1003-6326(07)60229-5_bib2) 2004; 272 ZHANG (10.1016/S1003-6326(07)60229-5_bib10) 2004; 25 YUAN (10.1016/S1003-6326(07)60229-5_bib4) 2003; 79 ARDIZZONE (10.1016/S1003-6326(07)60229-5_bib7) 1995; 40 XU (10.1016/S1003-6326(07)60229-5_bib16) 2001 CAO (10.1016/S1003-6326(07)60229-5_bib6) 1996; 18 NETHRAVATHI (10.1016/S1003-6326(07)60229-5_bib12) 2005; 109 LI (10.1016/S1003-6326(07)60229-5_bib14) 1999; 20 |
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| Snippet | The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent, surfactant, solvent, pH value of the... TG1; The nanocubic Co3O4 was synthesized by hydrothermal oxidation method. The effects of cobalt salt, precipitating agent,surfactant, solvent, pH value of the... |
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| SubjectTerms | Co3O4 处理技术 水热氧化 金属复合物 |
| Title | Shape-controlled synthesis of nanocubic Co3O4 by hydrothermal oxidation method |
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