Fluorene Functionalized Nanoporous SBA-15 as a Novel Adsorbent for Fast and Efficient Removal of Acid Dyes


1 Department of Chemistry, Yadegar -e- Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

2 School of Chemistry, College of Science, University of Tehran, Tehran, Iran

3 Department of Chemistry, Savadkooh Branch, Islamic Azad University, Savadkooh, Iran

4 Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran

5 Department of Chemistry, Alzahra University, Tehran, Iran


SBA-15 grafted with N-(4-(trimethylsilyl) butyl)-9H-fluorene-9-amine was synthesized by a simple
strategy and applied to removal of Acid Red 33 and Acid Black 194 from aqueous solutions. SBA-
15 was synthesized and Functionalized according to procedure in the literature. Fluorene
functionalized SBA-15 was showed the BET surface area 200 m2g-1 and pore diameter 4.2 nm,
based on adsorption-desorption of N2 at 77 K. The presence of organic groups in the silica
framework was demonstrated by FTIR and Raman spectrum. The effects of pH, amount of
adsorbent, contact time and dye concentration on adsorption were determined in order to find the
optimum adsorption conditions. The data fitted well to the Langmuir model with maximum
adsorption capacities 500.0 mg/g for Acid Red 33 and 110.0 mg/g for Acid Black 194. The results
were shown that this methodology could be suitable for the removal of the pollutant acid dyes from
dyeing wastewater of handmade carpet’s fibers.