Mesoporous spongy Ni–Co oxides@wheat straw-derived SiO2 for adsorption and photocatalytic degradation of methylene blue pollutants

Abstract

The exploitation and employment of agricultural waste in polluted water treatment is one of the most important cost-effective approaches. Therefore, a novel mesoporous spongy adsorbent/photocatalyst was successfully synthesized through the grafting of nickel and cobalt oxides nanocomposites with wheat straw-derived SiO2. Nickel and cobalt oxides were added to enhance the functionality of wheat straw-derived SiO2. This synthesis methodology presents a simplistic, cost-effective, and eco-approachable alternative to getting an adsorbent and photocatalyst for the adsorption and photocatalytic degradation of methylene blue (MB) pollutants from wastewater. The modified wheat straw-derived SiO2 (MWSS) was characterized via XRD, SEM, EDX, TGA, FTIR, and nitrogen adsorption. Molecular dynamics computational calculations were performed to comprehend the ability of methylene blue to adjust the WSDS surface. The experiments of adsorption and photodegradation trials were performed to optimize the pH, contact time, initial MB-concentration, and temperature parameters. Furthermore, kinetics and isotherm models were checked to explain the MBremoval mechanism using mesoporous spongy MWSS. The current work indicated that the 2 mesoporous MWSS adsorbent/photocatalyst provided efficient adsorption capability (79%), significant photocatalytic performance (93%), and higher solidity during reusability as well.This study suggests an efficient composite that contributes to getting rid of the MB pollutants from wastewater.

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

“…Figure 4D represents the impact of the increase in the C o of CR on the efficacy of the adsorption process. The increase in the C o of CR from 50 to 300 mg/g increases q from 99.63 to 360.00 mg/g which may be due to the boosting in the deriving forces of the CR molecules, overcoming the mass resistance forces that hinder the CR molecules to reach the α-kGl-AmCsSB surface (Gomaa et al 2022a;Hussein et al 2022). Noteworthy, α-kGl-AmCsSB not only provides a high efficiency but also a fast separation since the CR adsorption process reached equilibrium within only 30 min.…”

A comprehensive review on LDH-based catalysts to activate persulfates for the degradation of organic pollutants

“…Several biological, physical, and chemical treatment techniques have been adopted to remove these wastes from water bodies. Biological processes such as bioreactors, biologically activated sludge, microbiological treatments, and lagoons possess many positive aspects including getting rid of biodegradable organic matter along with a significant capability of removing biological oxygen demand, and suspended solids 19,20 . On the other hand, they reveal several drawbacks such as slow rate of degradation, low biodegradability of dyes, and the possible formation of biological sludge 21,22 .…”

Recyclable Carbon Cloth-Supported ZnO@Ag3PO4 Core–Shell Structure for Photocatalytic Degradation of Organic Dye

“…Up to now, a majority of the reported photocatalysts exist in the state of powder, which causes difficulty in separation and recycling when it comes to practical applications [ 29 , 30 ], highlighting the need for preparing immobilized photocatalysts with both high activity and recyclability [ 31 ]. Carbon cloth has unique physical and chemical properties such as a large specific surface area, excellent electrical conductivity, high strength, good thermal stability, and good corrosion resistance, which has been widely used in supercapacitors, lithium–ion batteries, electrocatalysis, microwave absorption, and other fields [ 32 , 33 , 34 ].…”