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Table 1 Selected properties of azo dyes

From: Preparation of ZnO Photocatalyst for the Efficient and Rapid Photocatalytic Degradation of Azo Dyes

Azo dyes

Structure

Formula

Molecular weight (g/mol)

Dye type

MW/S

Azo bond

MO

C14H14N3SO3Na

327.33

Anionic

163.67

1

CR

C32H22N6Na2O6S2

696.68

Anionic

348.34

2

DB38

C34H25N9Na2O7S2

781.73

Anionic

390.87

3

  1. MW/S is the ratio of the molecular weight of dyes to the number of sulfonic groups in the dye

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