Visible-Light-Driven Reduced Graphite Oxide As a Metal-Free Catalyst for Degradation of Colored Wastewater

Overview

Journal Nanomaterials (Basel)

Date 2022 Feb 15

PMID 35159719

Authors

Mahmoud Mazarji

Niyaz Mohammad Mahmoodi

Gholamreza Nabi Bidhendi

Tatiana Minkina

Svetlana Sushkova

Saglara Mandzhieva

Tatiana Bauer

Alexander Soldatov

Affiliations

Soon will be listed here.

Abstract

Reduced graphite oxide (rGO)-based materials have demonstrated promising potential for advanced oxidation processes. Along with its distinctive 2D characteristics, rGO offers the prospect of catalytic degradation of various kinds of organic pollutants from aqueous environments. The practical application of rGO as a metal-free catalyst material to promote the Fenton reaction depends on the degree of rGO reduction. In this regard, the rGO was prepared according to oxidation by modified Hummers' method and two-step reduction via hydrothermal and calcination in the N atmosphere. The as-prepared rGO was characterized in terms of X-ray diffraction, Fourier-transform infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy, UV-vis absorption spectroscopy, and transmission electron microscopy. The effectiveness of as-prepared rGO as a photocatalyst and the metal-free catalyst to decolorize different textile dyes, including basic red 46, basic red 18, and methylene blue, was investigated in visible/rGO and visible/rGO/HO systems. The impact of operational factors such as catalyst dose, pH, and initial dye concentration was examined. The dye degradation process was investigated by the pseudo-first-order kinetic model. In addition, the recyclability of rGO in the visible/rGO/HO system was examined.

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