TY  - JOUR
AU  - Sen, D.
AU  - Bahadur, J.
AU  - Das, Avik
AU  - Mazumder, S.
AU  - Melo, J. S.
AU  - Frielinghaus, H.
AU  - Loidl, R.
TI  - E. coli imprinted nano-structured silica micro-granules by spray drying: Optimization of calcination temperature
JO  - Colloids and surfaces / B
VL  - 127
SN  - 0927-7765
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2015-01657
SP  - 164 - 171
PY  - 2015
AB  - We have synthesized nano-structured silica–Escherichia coli composite micro-granules by spray drying of mixed suspension of silica and E. coli through evaporation-induced assembly. Synthesized micro-granules were subjected to calcination in order to form shape-matched macro-pores by removing the bacterial cells. The optimization of calcination temperature is crucial because calcination process leads to two contrasting effects, namely, (i) removal of E. coli from the granules and (ii) alteration of mesoscopic structure in the silica network. We have used small-angle neutron scattering and thermo-gravimetric analysis to determine the optimum temperature for calcination of these granules. It was found that calcination in the temperature range of 200 °C to 400 °C removes the cells without significant alteration of the nano-structured silica network. However, beyond 500 °C, calcination results significant coalescence between the silica particles. Calcination at 600 °C eventually collapses the meso-pore network of silica interstices.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000353001400022
DO  - DOI:10.1016/j.colsurfb.2015.01.031
UR  - https://juser.fz-juelich.de/record/188215
ER  -