| A strategy for synthesis of polymer-protective bimetallic colloids |
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| 作者姓名： | WANG Yuan GUI Lin-Lin TANG You-Qi |
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| 作者单位： | WANG，Yuan GUI，Lin-Lin TANG，You-QiDepartment of Chemistry，Peking University，Beijing 100871，China Institute of Chemistry，Chinese Academy of Sciences，beijing 100080 |
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| 摘 要： | A strategy for the synthesis of polymer-protective bimetallic sols is proposed which has the advantage of the strong protective effect of the polymer agent on one of the composites to stabilize the bimetallic colloidal particles. This strategy is certified to be useful to the predication of the formation of stable bimetallic colloids protected by polymer and to the control of the particle size to a certain extent. A series of new PVP-protective bimetallic colloidal dispersions containing noble metal element (Pt, Rh, Pd), light transition metal element (Co, Fe), and boron are obtained from the corresponding salts by the methods of reduction by stage and coreduction, using the NaBH4 as reductant. The TEM, XRD and EPMA measurements indicate the formation of bimetallic colloids. An interesting kind of coil aggregation is observed in the systems of PVP-Pt-Co and PVP-Rh-Co prepared by the method of reduction by stage.
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A strategy for synthesis of polymer-protective bimetallic colloids |
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| WANG,Yuan GUI,Lin-Lin TANG,You-Qi.A strategy for synthesis of polymer-protective bimetallic colloids[J].Chinese Journal of Chemistry,1994,12(1):11-18. |
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| Authors: | WANG Yuan GUI Lin-Lin TANG You-Qi |
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| Institution: | WANG,Yuan GUI,Lin-Lin TANG,You-QiDepartment of Chemistry,Peking University,Beijing 100871,China Institute of Chemistry,Chinese Academy of Sciences,beijing 100080 |
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| Abstract: | A strategy for the synthesis of polymer-protective bimetallic sols is proposed which has the advantage of the strong protective effect of the polymer agent on one of the composites to stabilize the bimetallic colloidal particles. This strategy is certified to be useful to the predication of the formation of stable bimetallic colloids protected by polymer and to the control of the particle size to a certain extent. A series of new PVP-protective bimetallic colloidal dispersions containing noble metal element (Pt, Rh, Pd), light transition metal element (Co, Fe), and boron are obtained from the corresponding salts by the methods of reduction by stage and coreduction, using the NaBH4 as reductant. The TEM, XRD and EPMA measurements indicate the formation of bimetallic colloids. An interesting kind of coil aggregation is observed in the systems of PVP-Pt-Co and PVP-Rh-Co prepared by the method of reduction by stage. |
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| Keywords: | Polymer-protective bimetallic colloids coil aggregation |
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