1. %Transmittance (a.u.) Wavenumbers (cm-1) 1000 1500 2000 2500 3000 3500
4000
Wavenumbers (cm-1)
Hal nanotube
EDA-Hal nanotube
DETA-Hal nanotube
TETA-Hal nanotube
TAEA-Hal nanotube
PEI(60.000)-Hal nanotube
PEI( )-Hal nanotube
PEI(1.800)-Hal nanotube
Fig. S1. FT-IR spectra of Hal nanotube and various amine modified forms of Hal nanotube.

2. DTG mg/min TG % Temperature (°C)
Hal nanotube
EDA-Hal nanotube
TETA-Hal nanotube
DETA-Hal nanotube
TAEA-Hal nanotube
PEI(1.800)-Hal nanotube
PEI( )-Hal nanotube
PEI(60.000)-Hal nanotube
Temperature (°C)
800.0
600.0
400.0
200.0
TG %
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
DTG mg/min
1.400
1.200
1.000
0.800
0.600
0.400
0.200
0.000
Fig. S2. TG, and DTG curves of Hal, and amine modified Hal nanotube (top the bottom ordering: Hal nanotube, EDA-Hal nanotube, TETA-Hal nanotube, DETA-Hal nanotube, TAEA-Hal nanotube, PEI(1.800)-Hal nanotube, PEI( )-Hal nanotube, PEI(60.000)-Hal nanotube).

3. Fig. S3. (a) ln k vs 1/T (Arrhenius eq
Fig. S3. (a) ln k vs 1/T (Arrhenius eq.), and (b) ln (k/T) vs 1/T (Eyring Eq.) for Hal nanotube and its modified forms [50 mg catalyst, 20 mL 125 mM NaBH4 at 1000 rpm mixing rate].