Gold nanoparticles decorated biguanidine modified mesoporous silica KIT-5 as recoverable heterogeneous catalyst for the reductive degradation of environmental contaminants

Hojat Veisi,Parasto Abassi,Bikash Karmakar,Taiebeh Tamoradi,Pourya Mohammadi

doi:10.1038/s41598-021-82242-z

Hojat Veisi, Parasto Abassi + Show 3 more

Open Access

https://doi.org/10.1038/s41598-021-82242-z

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Journal: Scientific Reports	Publication Date: Feb 2, 2021
Citations: 42	License type: open-access

Affiliation: Payame Noor University, Presidency University

Abstract

This current study involves the novel synthesis of Au nanoparticles (Au NPs) decorated biguanidine modified mesoporous silica KIT-5 following post-functionalization approach. The tiny Au NPs were being stabilized over the in situ prepared biguanidine ligand. The high surface area material was characterized using analytical techniques like Fourier Transformed infrared (FT-IR) spectroscopy, N2-adsorption–desorption isotherm, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Spectroscopy (EDS), and X-ray Diffraction study (XRD). Our material was found to be an efficient catalyst in the reductive degradation of harmful water contaminating organic dyes like Methylene blue (MB), Methyl Orange (MO) and Rhodamin B (RhB) in presence of NaBH4 at room temperature. The whole procedure was followed up with the help of time dependant UV–Vis spectroscopy. All the reactions followed pseudo-unimolecular kinetics and corresponding rate constant were determined. The reduction rate becomes high in presence of higher load of catalysts.

Highlights

This current study involves the novel synthesis of Au nanoparticles (Au NPs) decorated biguanidine modified mesoporous silica KIT-5 following post-functionalization approach
Being a part of this study, towards the continuous development of this p rotocol[27], we wish to report gold nanoparticle embedded biguanidine functionalized and amine modified mesoporous KIT-5 as a novel nanocomposite catalyst in the reduction of some specific organic dyes, namely, Methylene Blue (MB), Methyl Orange (MO) and Rhodamine B (RhB) using N aBH4 as reducing agent (Scheme 1)
The nanocatalyst was synthesized following post-grafting approach over the KIT-5 mesoporous silica and Au (0) NP was deposited over the surface functionalized matrix by in situ reduction of the chelated Au(III) ions

Summary

Introduction

This current study involves the novel synthesis of Au nanoparticles (Au NPs) decorated biguanidine modified mesoporous silica KIT-5 following post-functionalization approach. Being a part of this study, towards the continuous development of this p rotocol[27], we wish to report gold nanoparticle embedded biguanidine functionalized and amine modified mesoporous KIT-5 as a novel nanocomposite catalyst in the reduction of some specific organic dyes, namely, Methylene Blue (MB), Methyl Orange (MO) and Rhodamine B (RhB) using N aBH4 as reducing agent (Scheme 1).

Results

Conclusion