Open Access Nano Express

Highly selective colorimetric detection and preconcentration of Bi(III) ions by dithizone complexes anchored onto mesoporous TiO2

Mohd Faisal1, Adel A Ismail12*, Farid A Harraz12, Houcine Bouzid14, Saleh A Al-Sayari13 and Ali Al-Hajry14

Author Affiliations

1 Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia

2 Nanostructured Materials and Nanotechnology Division, Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87, Helwan, Cairo 11421, Egypt

3 College of Science and Arts-Sharoura, Najran University, Sharoura, Saudi Arabia

4 Department of Physics, College of Science and Arts, Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia

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Nanoscale Research Letters 2014, 9:62  doi:10.1186/1556-276X-9-62

Published: 6 February 2014

Abstract

We successfully developed a single-step detection and removal unit for Bi(III) ions based on dithizone (DZ) anchored on mesoporous TiO2 with rapid colorometric response and high selectivity for the first time. [(DZ)3-Bi] complex is easily separated and collected by mesoporous TiO2 as adsorbent and preconcentrator without any color change of the produced complex onto the surface of mesoporous TiO2 (TiO2-[(DZ)3-Bi]) at different Bi(III) concentrations. This is because highly potent mesoporous TiO2 architecture provides proficient channeling or movement of Bi(III) ions for efficient binding of metal ion, and the simultaneous excellent adsorbing nature of mesoporous TiO2 provides an extra plane for the removal of metal ions.

Keywords:
Mesoporous TiO2; Optical sensor; Detection; Preconcentration; Bi(III) ions