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Table 2 Absorption spectra of synthesized SnO₂ samples

From: SnO₂ Nanostructures: Effect of Processing Parameters on Their Structural and Functional Properties

Wavenumber (cm⁻¹)		Vibrational band	Reference data (cm⁻¹)
TO1	TO2	Vibrational band	Reference data (cm⁻¹)
435	434	Sn–O (O–Sn–O)	428 [23]
–	563	Sn–O (Sn–OH)	537 [28], 546 [29], 567 [23]
–	607	Sn–O (Sn–O–Sn)	613 [30], 623 [31]
664	684	Sn–O	673 [23]
810	809	O–Sn–O	817 [32]
875	875	O–Sn–OH	866 [33]
1022	1020	Sn–O (O–Sn–O)	1021 [34]
1065	1068	O₂ ⁻ (chemical adsorption)	1045 [34]
1387	1387	CO₂ (physical adsorption)	1386 [35]
1561	1565	O₂ (physical adsorption)	1580 [34]
–	–	H₂O (bounded) (Sn–OH)	1631 [31], 1633 [31]
2857	2848	CO₂ (chemical adsorption)	2840, 2925 [34]
2926	2927	CO₂ (chemical adsorption)	2840, 2925 [34]
–	–	H₂O (adsorbed) (Sn–OH)	3394 [28, 31], 3413 [28]

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