Synthesis of Citrate-Capped Gold Nanoparticles from Reduced [AuCl<sub>4</sub>]<sup>–</sup> on Ascorbic Acid-Immobilized Mg/Al Hydrotalcite
Reductive adsorption of [AuCl4]-– by using ascorbic acid immobilized on Mg/Al hydrotalcite (Mg/Al HT) and synthesis of gold nanoparticles (AuNPs) from the reduced gold using sodium citrate have been conducted. Mg/Al HT was synthesized by co-precipitation method at pH 10 with molar ratio of Mg(II) an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Department of Chemistry, Universitas Gadjah Mada
2018-08-01
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| Series: | Indonesian Journal of Chemistry |
| Subjects: | |
| Online Access: | https://jurnal.ugm.ac.id/ijc/article/view/30203 |
| Summary: | Reductive adsorption of [AuCl4]-– by using ascorbic acid immobilized on Mg/Al hydrotalcite (Mg/Al HT) and synthesis of gold nanoparticles (AuNPs) from the reduced gold using sodium citrate have been conducted. Mg/Al HT was synthesized by co-precipitation method at pH 10 with molar ratio of Mg(II) and Al(III) 2:1. Ascorbic acid (AA) was then immobilized on Mg/Al HT to form hybrid of AA and Mg/Al HT (Mg/Al HT-AA). Mg/Al HT-AA was used to reductively adsorb [AuCl4]– and the formed Au(0) was extracted by using sodium citrate to form citrate-capped AuNPs. The formation of AuNPs from 100 mg/L [AuCl4]– solution removed by 60 mg Mg/Al HT-AA was optimum at pH 5.0, by using 70 mM sodium citrate and 2 h sonication time. This optimum condition was successfully applied to synthesize AuNPs from [AuCl4]– as the leaching product of gold from PCB using aquaregia. |
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| ISSN: | 1411-9420 2460-1578 |