Supplementary Information Insights into Metal Oxide and Zero-Valent Metal Nanocrystal Formation on Multiwalled Carbon Nanotube Surfaces during Sol-gel Process Dipesh Das 1, Indu V. Sabaraya 1, Tara Sabo-Attwood 2 and Navid B. Saleh 1,* Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
[email protected] (D.D.);
[email protected] (I.V.S.) 2 Department of Environment and Global Health, University of Florida, Gainesville, FL 32610, USA;
[email protected] * Correspondence:
[email protected]; Tel.: +1 (512)-471-9175 1
Nanomaterials 2018, 8, 403; doi:10.3390/nano8060403
www.mdpi.com/journal/nanomaterials
Nanomaterials 2018, 8, 403
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Table S1. Standard Electrode potential of different metal species: Reactions and values1 1Vanysek,
P., Electrochemical series. CRC handbook of chemistry and physics 1998, 87
NH
Reaction
MWNT-Al2O3 MWNT-CeO2 MWNT-CoO3 MWNT-Cu2O MWNT-Er2O3 MWNT-Eu2O3 MWNT-FexOy MWNT-HfO2 MWNT-MgO MWNT-MnO MWNT-MoO2 MWNT-NiO MWNT-Pr6O11 MWNT-SiO2 MWNT-SnO2 MWNT-TiO2 MWNT-VxOy MWNT-WO3 MWNT-ZnO MWNT-ZrO2 MWNT-Ag MWNT-Au MWNT-Pd MWNT-Pt
Al3+ +3e- ↔ Al (s) Ce3+ +3e- ↔ Ce (s) Co2+ +2e- ↔ Co (s) Cu2+ +2e- ↔ Cu (s) Er3+ +3e- ↔ Er (s) Eu3+ +3e- ↔ Eu (s) Fe2+ +2e- ↔ Fe (s) Hf4+ +4e- ↔ Hf (s) Mg2+ +2e- ↔ Mg (s) Mn2+ +2e- ↔ Mn (s) Mo3+ +3e- ↔ Mo (s) Ni2+ +2e- ↔ Ni (s) Pr3+ +3e- ↔ Pr (s) -Sn2+ +2e- ↔ Sn (s) Ti2+ +2e- ↔ Ti (s) V2+ +2e- ↔ Pr (s) W3+ +3e- ↔ W (s) Zn2+ +2e- ↔ Zn (s) Zr4+ +4e- ↔ Zr (s) Ag+ +e- ↔ Ag (s) Au3+ +3e- ↔ Au (s) Pd2+ +2e- ↔ Pd (s) Pt2+ +3e- ↔ Pt (s)
Standard Electrode Potential (V) -1.662 -2.336 -0.28 +0.345 -2.331 -1.991 -0.44 -1.55 -2.372 -1.185 -0.200 -0.25 -2.353 -0.1375 -1.63 -1.13 +0.1 -0.7628 -1.45 +0.7996 +1.498 +0.951 +1.18
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Table S2 Atomic percentages and molar ratio of carbon: metal estimated from the XPS spectra using CasaXPS software. Sample
%C
%Metal
MWNT-ZnO
78.5±1.0
6.2±0.5
MWNT-Ag
89.4±0.9
8.3±0.5
MWNT-Cu/Cu2O
79.2±1.2
5.2±0.4
