Table 2 XPS characterization test results.

From: Highly efficient removal of Sb(V) from water by franklinite-containing nano-FeZn composites

Element

Binding energy(eV)

Valence states of corresponding elements

Sample

C1s

284.61

C–OH

NZV-FeZn(2019111401)

286.09

C–C/C=C

288.36

O–C=O

O1s

530.66

Fe–O

531.19

O–C=O

Fe2p

710.53

Fe2O3

711.82

Fe2p3/2 (FeOOH)

713.53

Fe2p3/2(Fe, metal)

716.35

Fe2p3/2(Fe3+, Oxidesate)

719.7

Fe2p2/3(Fe(III), Satellite)

724.95

Fe2p1/2 (FeO)

730.19

Fe2p1/2(Fe(III), Satellite)

Zn2p

1025.9

Zn 2p 3/2

1045.3

Zn2p1/2

C1s

283.91

Graphite

rGO/NZV-FeZn (2019111402)

284.88

C–OH

286.08

C–C/C=C

288.9

O–C=O

O 1s

531.76

O–C=O

532.65

Fe–O

Fe2p

703.27

Fe2p3/2 (metal)

709.96

Fe2p3/2(metal)

711.41

Fe2p3/2 (FeOOH or FeO)

713.22

Fe2p3/2(Fe, metal)

725.05

Fe2p1/2 (FeO)

729.97

Fe2p1/2(Fe(II), Satellite)

Zn2p

1025.1

Zn 2p3/2

1045.2

Zn2p1/2

Sb3dO1s

530.13

Sb2O3

rGO/NZV-FeZn(Sb, 2019111402)

531.59

Fe–O/Sb(III)O3d5/2

539.59

Sb3d3/2(Sb(V))