SYNTHESIS OF HOLLOW

SILICA NANOPARTICLES

Jen Yi Wong (14R55016)

Home University: Imperial College London

Supervisor: Toshiyuki Ikoma

Department of Metallurgical Engineering

Objectives

Synthesis of hollow silica mesoporous nanoparticles with small size

(~200nm) and large pore size (10-12nm)

Reasons:

1. Increase carrying capacity of each nanoparticle

2. Increase local concentration for enzyme activity

Workflow Glucose dissolved

in water to

concentration of

0.5M

Hydrothermal

treatment:

Incubated at 1700

for 9 hours,

centrifuged, and

dried overnight

Carbon spheres

mixed with

ethanol, ammonia,

water, TEOS and

tannic acid for 8

hours, centrifuged

and dried

Calcinated at

5500 for 5 hours Characterised

using SEM and

FTIR

Results (carbon spheres)

0

10

20

30

40

50

60

70

80

90

100

050010001500200025003000350040004500

Tra

nsm

itta

nce/%

Wavenumber/cm-1

IR Spectra of HSNP after heating

Results (FTIR)

0

10

20

30

40

50

60

70

80

90

100

050010001500200025003000350040004500

Tra

nsm

itta

nce/%

Wavenumber/cm-1

IR Spectra of HSNP before heating

Si-OH

stretch

Si-O-Si

stretch

Si-O

stretch

C-C

stretch

C-O

stretch

C-H

bend

C-O-H

stretch

Si-OH

stretch

O-H

stretch

Results (SEM)

Before calcination/combustion After calcination/combustion

Acknowledgments

•Professor Junzo Tanaka

•Professor Toshiyuki Ikoma

•Labmates

Asakusa

Mt Fuji

Kamakura

Hiroshima Kyoto

Hakone

Ceramics Conference STAC 8 Comicket Summer 2014