Facile Controlling of the Physical Properties of Zinc Oxide and Its Application to Enhanced Photocatalysis

Table 1

The basic characteristics of tartrazine and caffeine.

Chemical	Tartrazine	Caffeine
Chemical formula	C16H9N4Na3O9S2	C8H10N4O2
Chemical class	Azo dye	Methylxanthine alkaloid
Molecular weight (g/mol)	534.4	194.19
Color	Yellow	Colorless
λmax (nm)	428	273
C.I. number	19140	—
Nature	Anion dye	—
Molecular structure