The Chemistry of Gold

Gimeno, M. Concepción

doi:10.1002/9783527623778.ch1

Cited by 28 publications

(25 citation statements)

References 350 publications

(224 reference statements)

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“…For gold photodeposition, the gold core has to be digested in strong acid that make the metal presence are dissolved to form Au 3+ , Ag + , Cu 2+, and Fe 3+ ions. The metal ions are known as reducible ions [4], that may influence on the gold photoreduction. Accordingly, the influence of the three metal ions on the gold photodeposition is also studied.…”

Section: The Influence Of Ag(i) Cu(ii) and Fe(iii) Ions In Gold Phomentioning

confidence: 99%

“…In the hydrochloride solution, gold is usually formed as ion AuCl 4 -, that is easy to be reduced into Au 0 or gold metal, indicated by its high reduction potential, i.e. 1.04 V [4].…”

Section: Introductionmentioning

confidence: 99%

“…In the hydrochloride solution, gold is usually formed as ion AuCl 4 -, that is easy to be reduced into Au 0 or gold metal, indicated by its high reduction potential, i.e. 1.04 V [4]. Accordingly, various types of reduction methods have been explored for gold recovery, including electrolysis [5], adsorptive-reduction [6][7][8][9], and bioreduction and biorecovery [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

Wahyuni¹

2015

AJAC

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For replacing the un-ecofriendly gold recovery methods, photoreduction catalyzed by TiO 2 is proposed as an environmentally benign alternative method for gold recovery. In this study, the photocatalytic reduction was carried out by batch technique, in which the influences of reaction time, TiO 2 photocatalyst dose, and initial Au(III) concentration were evaluated to get the optimal condition. In addition, the influence of Ag(I), Cu(II), and Fe(III) that are usually found along with gold in the gold mineral is also studied. The research results indicate that the effective Au(III) photoreduction catalyzed by TiO 2 has produced brown solid powder of gold element. It is also found that the effectiveness of Au(III) photoreduction is controlled by reaction time, Au(III) initial concentration, and photocatalyst dose. Furthermore, the presence of Ag(I) and Cu(II) ions leads to the gold photodeposition decreased, meanwhile the presence of Fe(III) ion can enhance the photoreduction. It is clear that photocatalytic method is a promising method for gold recovery, with respect to the easiness, cheapness, and eco-friendliness.

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Section: The Influence Of Ag(i) Cu(ii) and Fe(iii) Ions In Gold Phomentioning

confidence: 99%

“…In the hydrochloride solution, gold is usually formed as ion AuCl 4 -, that is easy to be reduced into Au 0 or gold metal, indicated by its high reduction potential, i.e. 1.04 V [4].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

Wahyuni¹

2015

AJAC

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“…Tetraarylsubstituted complexes of gold(III) are also known [61,86] Compound 2 ( Fig. 5) in crystalline state is thermally stable and decomposes only at 153°С.…”

Section: Li[aume 4 ] + Pph 3 [Aume 3 (Pph 3 )] + Limementioning

confidence: 99%

Chemistry of gold(I, III) complexes with organic ligands as potential MOCVD precursors for fabrication of thin metallic films and nanoparticles

Basova

Hassan

Морозова

2019

Coordination Chemistry Reviews

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“…Konduktivitas (105,107) Konduktivitas merupakan suatu pergerakan ion yang disebabkan oleh pengaruh medan listrik (E) yang membuat larutan mampu menghasilkan energi listrik karena adanya ion-ion bergerak, sedangakan kemampuan suatu ion didalam larutan menghasilkan listrik disebut sebagai konduktivitas listrik. Karena ion memiliki karakteristik tertentu dalam larutannya (116,117,(126)(127)(128)(129)(130)(131)(118)(119)(120)(121)(122)(123)(124)(125) dengan daya hantar listriknya, nilai konduktivitas listrik dapat menunjukkan seberapa besar konsentrasi ion didalam larutan. Selain itu, banyaknya ion didalam larutan juga dapat disebabkan oleh sifat kelarutan padalan didalam larutan.…”

Section: Kegunaan Kalium Nitratunclassified

Kalium Nitrat (KNO3): Karakteristik Senyawa dan Transpor Ion

Nurfadilah¹,

Zainul²

2019

Preprint

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Kalium Nitrat merupakan garam anorganik dengan rumus kimia KNO3. Kalium Nitrat termasuk senyawa ionik yang disusun oleh kation K+ dan NO3- dan merupakan sumber nitrogen paling penting dialam. Kalium nitrat bersifat polar yang dapat larut di dalam air, 133 g/L (00C) dan 316 g/L (200C). Penelitian yang dilakukukan terhadap Kalium Nitrat digunakan untuk menganalisis struktur molekul dan sifat-sifat transpor ion senyawa menggunakan kalkulasi matematis dan pemodelan dari ChemOffice 15.0. Data lain seperti sifat-sifat atom penyusun dan sifat transpor ion didapat dengan review beeberapa jurnal dari beberapa sumber sesuai dengan bagan Fishbone yang telah dibuat. Mr KNO3: 101 g/mol, ρ: 2,109 g/cm3, titik leleh: 3340C dan titik didih: 4000C yang membuat KNO3 terdekomposisi menjadi KNO2. Mobilitas kation K+: 7,62 m2s-1V-1 dan NO3-: 7,40 m2s-1V-1. Konduktivitas KNO3: 0,09479 x 10-8 mho/cm. kecepatan hanyut K+: 7,62 m3s-1V-1 dan NO3- = 15,429 X 10−8 m/s. Larutan ini memiliki viskositas (𝜂) = 0,216 𝑋 10−3 𝑚𝑃𝑎.𝑠. Optimasi MM2 minimization menunjukkan bahwa Kalium Nitrat memiliki Stretch: 0.0518; Bend: 2.8626; Stretch-Bend: -0.0591; Torsion: 0.0000; Non-1,4 VDW: 3.5709; 1,4 VDW: 0.0000; Charge/Charge: -39.0035; Charge/Dipole: -3.8510; Dipole/Dipole: 0.0000; Total Energy: -36.4283 kcal/mol, pada kalkulasi MM2 Dynamics, Kalium Nitrat memiliki Iteration Time sebesar 3140.628; Total Energy -52.274; Potential Energy -55.683; Temperature 228.77. dan dengan kalkulasi MM2 Properties, Kalium Nitrat memiliki Stretch: 1.9202; Bend: 17.0060; Stretch-Bend: -2.7911; Torsion: 0.0000; Non-1,4 VDW: 12.3427; 1,4 VDW: 0.0000; Charge/Charge: -64.2742; Charge/Dipole: -19.4215; Dipole/Dipole: 0.0000; Total Energy: -55.2178 kcal/mol; The total energy of frame: -55.218 kcal/mol.

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The Chemistry of Gold

Cited by 28 publications

References 350 publications

Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

Chemistry of gold(I, III) complexes with organic ligands as potential MOCVD precursors for fabrication of thin metallic films and nanoparticles

Kalium Nitrat (KNO3): Karakteristik Senyawa dan Transpor Ion

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The Chemistry of Gold

Cited by 28 publications

References 350 publications

Application of Photocatalytic Reduction Method with TiO&lt;sub&gt;2&lt;/sub&gt; for Gold Recovery

Application of Photocatalytic Reduction Method with TiO&lt;sub&gt;2&lt;/sub&gt; for Gold Recovery

Chemistry of gold(I, III) complexes with organic ligands as potential MOCVD precursors for fabrication of thin metallic films and nanoparticles

Kalium Nitrat (KNO3): Karakteristik Senyawa dan Transpor Ion

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Product

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Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery

Application of Photocatalytic Reduction Method with TiO<sub>2</sub> for Gold Recovery