Electronic Supplemental Materials

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets 

prepared by hydrothermal methods

Kien Nguyen, Nguyen Duc Hoa*, Chu Manh Hung, Dang Thi Thanh Le, Nguyen Van Duy, Nguyen Van Hieu

International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 - Dai Co Viet Str. Hanoi, Vietnam

Corresponding author: [email protected]

Electronic Supplemental Materials

Electronic Supplementary Material (ESI) for RSC Advances.This journal is © The Royal Society of Chemistry 2018

Figure S1. (A) SEM, and (B-D) TEM images of the as-hydrothermal nanowires

(A)

500 nm

(B)

(C) (D)

10 nm 2 nm

d111=0.24 nm

200 nm

Figure S2. (A) XRD pattern the hydrothermal synthesized NiC2O4.2H2O nanowires

Figure S3. (A) SEM, and (B-D) TEM images of the single crystal Ni(OH)2 nanosheets

100 nm200 nm

(A) (B)

20 nm 2 nmd101=0.238 nm

(C) (D)

Figure S4. XRD pattern of the hydrothermal synthesized Ni(OH)2 nanosheets

Figure S5. Nitrogen adsorption/desorption isotherm of the hydrothermal synthesized NiC2O4.2H2O nanowires

Figure S6. Nitrogen adsorption/desorption isotherm of the hydrothermal synthesized Ni(OH)2 nanosheets

Figure  S7.  Enlargement of Figure 4(A), confirming the hysteresis loop of the nitrogen adsorption/desorption isotherm of NiO nanosheets

Figure S8. CV curve of NiO nanosheets after 10 scans.

Figure S9. Electrochemical impedance spectroscopy Nyquist plots of NiO nanosheets and nanowires