Synthesis of Layer-By-Layer Decorated Graphene Oxide with Bismuth Telluride Nanoparticles-modified Dendrimer: Application for Nonylphenol Removal from Aqueous Solutions

Herein, for the first time, the bismuth telluride (Bi2Te3) nanoparticles functionalized graphene oxide (GO) were synthesized for the removal of nonylphenol (NP). The surface of the GO-Bi2Te3 nanocomposite was modified by hyperbranched dendrimer and characterized by different spectroscopic and morphological techniques such as Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDX), and thermogravimetric analysis (TGA). In this paper, to enhance the capacity, the surface of GO-Bi2Te3@GlyTsCl dendrimer was modified by 5-amino-2-hydroxybenzoic acid (5-ASA). The effects of parameters on the removal of NP were also studied. This study reports the utilization of nanoadsorbent (GO-Bi2Te3@GlyTsCl/5-ASA) for the removal of NP by high-performance liquid chromatography with fluorescence detector (HPLC-FLD). Under optimal conditions, the removal values for the method were in the range of 90-96 %. Additionally, the Langmuir model was found to be fit with the isotherms data. The best kinetic model fit for the adsorption of NP from nanoadsorbent was the pseudo-second-order model. Moreover, GO-Bi2Te3@GlyTsCl/5-ASA nanoadsorbent exposed good reusability even after six consecutive cycles (from 100 % to 93 %) with high stability. Consequently, synthesized GO-Bi2Te3@GlyTsCl/5-ASA composites could be potentially used as an efficient nanoadsorbent for NP removal in water samples. A novel nanoadsorbent, bismuth telluride (Bi2Te3) nanoparticles functionalized graphene oxide (GO), was prepared and a hyper-branched demdrimer was then covalently attached to their surface. About 96 % of nonylphenol (NP) removal could be obtained in the case of nanoadsorbent under the conditions of pH=3, contact time=15 min, temperature of 30 degrees C, and initial NP concentration 2 mg L-1 from river water and industrial wastewater samples. image