Supplementary Material (ESI) for Journal of Materials Chemistry

This journal is (c) The Royal Society of Chemistry 2010

1

Supporting information

One-Step Synthesis of Superparamagnetic Monodisperse Porous Fe3O4

Hollow and Core-Shell Spheres

Wei Cheng, Kaibin Tang,* Yunxia Qi, Jie Sheng, Zhongping Liu

Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at the

Microscale. Department of Chemistry, University of Science and Technology of China, Hefei 230026,

P.R. China. E-mail: kbtang@ustc.edu.cn. Phone: 86-551-3601791.

10 20 30 40 50 60 70

Inte

nsity

(a.u

.)

2Theta (degree)

(440

)

(511

)

JCPDS #75-0033

JCPDS #39-1346

(111

) (220

)(3

11)

(222

)

(400

)

(422

)

(110

)

(210

)(2

11)

Figure S1. XRD pattern of the typical sample and the JCPDS cards #75-0033 (Fe3O4), # 39-1346 (γ-

Fe2O3)

Supplementary Material (ESI) for Journal of Materials Chemistry

This journal is (c) The Royal Society of Chemistry 2010

2

Table S1. The d values, intensities of the peaks in the XRD pattern of the typical sample and the

JCPDS cards #75-0033 (Fe3O4), # 39-1346 (γ-Fe2O3).

Sample JCPDS #75-0033 JCPDS #39-1346

(hkl) d value [Å] Intensity [%] d value [Å] Intensity [%] d value [Å] Intensity [%]

(111)

(220)

(311)

(222)

(400)

(422)

(511)

(440)

4.8387

2.9626

2.5248

2.4190

2.0943

1.7093

1.6118

1.4808

7

30

100

6

20

8

26

35

4.8405

2.9641

2.5278

2.4202

2.0960

1.7113

1.6135

1.4821

7

29

100

7

20

8

24

34

4.8220

2.9530

2.5177

2.4119

2.0886

1.7045

1.6073

1.4758

4

35

100

3

16

10

24

34

Supplementary Material (ESI) for Journal of Materials Chemistry

This journal is (c) The Royal Society of Chemistry 2010

3

700 705 710 715 720 725 730 735 740

Inte

nsity

(a.u

.)

Binding Energy (eV)

Fe2p3/2

Fe2p

1/2

Figure S2. XPS spectra of the typical sample.

10 20 30 40 50 60 70

▼●α -Fe

2O

3

▼ Fe3O4▼

▼ ▼▼ ▼

●●

●●

●● ● ●

Inte

nsity

(a.u

)

2Theta (degree)

a

b

c

d

Supplementary Material (ESI) for Journal of Materials Chemistry

This journal is (c) The Royal Society of Chemistry 2010

4

Figure S3. XRD pattern of the product prepared with different concentration of citrate: (a) 0, (b)

0.0125 M, (c) 0.025 M, (d) 0.05 M. Other parameters are the same with typical synthesis.

Figure S4. TEM images of the product synthesized with different concentration of citrate: (a) 0.075 M,

(b) 0.125 M, (c) 0.15 M. Other experimental parameters are the same with typical synthesis.

Figure S5. TEM images of the product synthesized with different concentration of PAM: (a) 0, (b) 10

g/L, (c) 15 g/L. Other conditions were kept constant with typical synthesis.