Template-Free Synthesis of Highly Uniform -GaOOH

Electronic Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2014

Supporting information

Silica/Ultrasmall Ag Composite Microspheres: Facile Synthesis, Characterization and Antibacterial and Catalytic Performance

Fig. S1. SEM (a, b) and TEM (c,d) images of silica microspheres with 200 nm in diameters.

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Electronic Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2014

Absorbance(a.u.)

1.5

1.0

c b a

0.5

0.0

300

400

500

600

Wavelength(nm)

700

800

Fig. S2. UV-vis absorption spectra of the as-prepared SiO 2 /Ag composite microspheres obtained from different amount of silica and [Ag(NH 3 ) 2 ]+ at 180 oC for 24 hour: (a) 0.5 g silica microspheres and 0.5 mmol [Ag(NH 3 ) 2 ]+; (b) 0.5 g silica microspheres and 1.0 mmol [Ag(NH 3 ) 2 ]+ 4 h ; (c) 0.25 g silica microspheres and 1.0 mmol [Ag(NH 3 ) 2 ]+ , respectively.

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Electronic Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2014

Fig. S3. TEM image of the as-prepared SiO 2 /Ag composite microspheres obtained from 0.5 mmol [Ag(NH 3 ) 2 ]+ in presence of 0.5 g silica at 180 oC for 24 hour.

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Electronic Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2014

111

4000

220

3000

311

5000

200

Relative Intensity (a.u.)

6000

c

2000

b

1000 0 10

a 20

30

40

50

60

70

80

2theta /deg. Fig. S4. XRD patterns of the as-prepared samples from reaction of 0.5 g silica microspheres and 1 mmol [Ag(NH 3 ) 2 ]+ at 140 oC (a), (b) 160 oC and 180 oC for 24 h; respectively.

a 0.030

20 15

dV/dD(cm3/kg/nm)

Volume Absorbed(cm3/g)

25

10 5 0 0.0

b

0.025 0.020 0.015 0.010

0.2

0.4 0.6 Relative Pressure(P/P0 )

0.8

1.0

0.005

0

20

40 60 80 Pore Diameter(nm)

100

Fig. S5 Nitrogen adsorption-desorption isotherms (a) and pore-size distribution curves (b) of the assynthesized SiO 2 /Ag composite microspheres.

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Electronic Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2014

Table S1 Element composition of the as-prepared SiO 2 /Ag microspheres from XPS analyses. Name Si2p C1s Ag3d O1s Total

Atomic% 31.16 9.52 2.16 57.17 100

Table S2. The MICs and MBCs of samples against (E. Coli) pathogenic organisms Sample 1

Sample 2

Sample 3

Sample 4

Sample 5

Sample 6

MIC(µg/ml)

80

200

50

500

200

80

MBC(µg /ml)

80

500

80

500

500

80

* Smaple 1: the SiO 2 /Ag microspheres obtained from 1 mmol [Ag(NH 3 ) 2 ] at in presence of 0.5 g silica microspheres at 180 oC for 24 h; Sample 2: the SiO 2 /Ag microspheres obtained from 0.5 mmol [Ag(NH 3 ) 2 ] at in presence of 0.5 g silica microspheres at 180 oC for 24 h; Sample 3: the SiO 2 /Ag microspheres obtained from 1 mmol [Ag(NH 3 ) 2 ] at in presence of 0.25 g silica microspheres at 180 oC for 24 h; Smaple 4: the SiO 2 /Ag microspheres obtained from 0.5 mmol [Ag(NH 3 ) 2 ] at in presence of 0.5 g silica microspheres at 160 oC for 24 h; Sample 5: the SiO 2 /Ag microspheres obtained from 1 mmol [Ag(NH 3 ) 2 ] at in presence of 0.5 g silica microspheres at 160 oC for 24 h; Sample 6: the SiO 2 /Ag microspheres obtained from 1 mmol [Ag(NH 3 ) 2 ] at in presence of 0.25 g silica microspheres at 160 oC for 24 h.

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