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Table 2 Preparation parameters of samples

From: An Important Factor Affecting the Supercapacitive Properties of Hydrogenated TiO2 Nanotube Arrays: Crystal Structure

Samples H@TNAs-1 H@TNAs-2 H@TNAs-3 H@TNAs-4
Anodisation Electrolyte composition NH4F (g) 0.3 0.3 0.3 0.3
H2O (mL) 2 2 2 2
Ethylene Glycol (mL) 98 98 98 98
Applied voltage (V) First anodisation 50 50 50 50
Second anodisation 50 50 50 50
Processing time (h) First anodisation 1 1 1 1
Second anodisation 1 1 1 1
Annealing Heating rate (°C min−2) 2 2 2 2
Temperature (oC) 450 650 650 650
Holding time (h) 3 1 2 3
Hydrogenation Electrolyte 0.5 M Na2SO4 0.5 M Na2SO4 0.5 M Na2SO4 0.5 M Na2SO4
Applied voltage (V) 5 5 5 5
Processing time (s) 30 30 30 30