Table 1 Summary of the FTIR results

RM

1112, 1030, 1008, 960, 479

(1)

Si-O bond in Quartz

[30]

559, 479

(2)

Fe-O bond in Hematite and Magnetite

[31]

812, 740, 685

(3)

Al-O bonds

[32]

PT-RM

870

(4)

Sodium aluminate

[33]

1420

(5)

Sodium silicate

SZSM-5 and CZSM-5

450

(6)

Bending vibration of T-O-T (T is Al or Si atom)

[29]

540

(7)

Asymmetric stretching vibration of the double five-membered ring (D5R) as a characteristic of pentasil MFI-type zeolite

[29]

798

(8)

External symmetric-asymmetric stretching mode of T-O-T (between TO₄ tetrahedral)

[29]

1100

(9)

Internal symmetric-asymmetric stretching mode of T-O-T (between TO₄ tetrahedral)

[34]

1220

(1)

Asymmetric stretching mode of T-O-T (between TO₄ tetrahedral)

[35]