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Process optimisation for n-type Bi2Te3 films electrodeposited on flexible recycled carbon fibre using response surface methodology

Jagadish, Priyanka R., Khalid, Mohammad, Amin, Nowshad, Li, Lau Phei, Chan, Andy
Journal of materials science 2017 v.52 no.19 pp. 11467-11481
bismuth, carbon fibers, electrolytes, energy, models, response surface methodology, temperature
Electrodeposition method was used to synthesise n-type bismuth telluride (Bi₂Te₃) films on recycled carbon fibre under different deposition conditions. D-optimal model under response surface methodology was used to design the experiment and optimise the following deposition parameters: deposition potential (V), deposition time (h), deposition temperature (°C) and electrolyte composition (molar concentration). The effects of electrodeposition parameters were evaluated within the limits of deposition potential (−0.10 to −0.60 V), deposition time (0.5–3 h), deposition temperature (25–60 °C) and electrolyte composition (0.2, 0.4 and 0.6 of Bi/(Bi + Te)). The optimum conditions for the electrodeposition parameters with the least amount of chemicals, time and energy consumption were −0.10 V, 0.5 h, 25 °C and 0.240 Bi/(Bi + Te), respectively, for deposition potential, deposition time, deposition temperature and electrolyte composition. Moreover, the validation of predicted values shows good agreement with experimental results with 1.45% deviation.