Amphi-functional mesoporous silica nanoparticles for dye separation

abstract

Synthesis of amphi-functional mesoporous silica nanoparticles (similar to 80 nm) by stepwise chemical modifications of outer and inner pore surfaces is reported. These materials display a clear "Janus" like character and are able to selectively and completely separate hydrophobic dyes form a mixture of dyes. Our results clearly suggest a clear partition of more hydrophobic dyes into the pores from a mixture of two dyes. In addition this material displays a remarkable recycling ability for 10 cycles with up to similar to 99% dye removal from water.

keywords

SELECTIVE FUNCTIONALIZATION; JANUS PARTICLES; ADSORPTION; NANOSPHERES; SURFACE; HYBRID

subject category

Chemistry; Energy & Fuels; Materials Science

authors

Shinde, P; Sen Gupta, S; Singh, B; Polshettiwar, V; Prasad, BLV

our authors

acknowledgements

PS thanks UGC, New Delhi for research fellowship. BLVP thanks the Council of Scientific and Industrial Research (CSIR), New Delhi for financial assistance through the 12th Five Year Plan Project (CSC 0134).

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