Table 1 Absorption edges, calculated optical band gaps, conduction band bottoms, valence band tops and suface area.

From: Fabrication of BiOBrxI1−x photocatalysts with tunable visible light catalytic activity by modulating band structures

BiOBrxI1−x

x = 1.0

x = 0.8

x = 0.5

x = 0.2

x = 0

Absorption edge (nm)

431

555

607

645

655

Optical band gap (eV)

2.87

2.23

2.04

1.92

1.89

CB bottom (eV)

−0.55

0.01

−0.04

−0.07

0.18

VB top (eV)

2.32

2.24

2.0

1.85

2.07

Suface area (m2 g−1)

7.8

10.8

10.3

9.8

10.0

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