Synthesis and Characterization of Modified BiOCl and Their Application in Adsorption of Low-Concentration Dyes from Aqueous Solution

Nanoscale Research Letters
Qihang ZhaoChunfang Du

Abstract

The synthesis and characterization of BiOCl and Fe3+-grafted BiOCl (Fe/BiOCl) is reported that are developed as efficient adsorbents for the removal of cationic dyes rhodamine B (RhB) and methylene blue (MB) as well as anionic dyes methyl orange (MO) and acid orange (AO) from aqueous solutions with low concentration of 0.01~0.04 mmol/L. Characterizations by various techniques indicate that Fe3+grafting induced more open porous structure and higher specific surface area. Both BiOCl and Fe/BiOCl with negatively charged surfaces showed excellent adsorption efficiency toward cationic dyes, which could sharply reach 99.6 and nearly 100% within 3 min on BiOCl and 97.0 and 98.0% within 10 min on Fe/BiOCl for removing RhB and MB, respectively. However, Fe/BiOCl showed higher adsorption capacity than BiOCl toward ionic dyes. The influence of initial dye concentration, temperature, and pH value on the adsorption capacity is comprehensively studied. The adsorption process of RhB conforms to Langmuir adsorption isotherm and pseudo-second-order kinetic feature. The excellent adsorption capacities of as-prepared adsorbents toward cationic dyes are rationalized on the basis of electrostatic attraction as well as open porous structure and high...Continue Reading

References

Jun 25, 2008·Journal of Hazardous Materials·B H HameedS A Sata
Jan 14, 2011·Journal of Hazardous Materials·Jianfeng MaDinglong Li
Mar 3, 2012·Journal of the American Chemical Society·Jing JiangLizhi Zhang
May 29, 2013·Journal of Hazardous Materials·Arun Lal SrivastavYogesh C Sharma
Jan 15, 2014·Journal of Hazardous Materials·Murat Akgül
Nov 26, 2015·Chemical Communications : Chem Comm·Liyong DingJuncheng Hu

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Methods Mentioned

BETA
X-ray
transmission electron microscopy

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