Enhanced catalytic benzene oxidation over a novel waste-derived Ag/eggshell catalyst

Abstract

Ag nanoparticles loaded-eggshell catalysts were successfully synthesized by a simple impregnation method, in which the trashy eggshell was served as both biotemplate and support. The eggshell supported Ag catalyst exhibit excellent catalytic activity and stability for benzene oxidation.

State-of-the-Art of Eggshell Waste in Materials Science: Recent Advances in Catalysis, Pharmaceutical Applications, and Mechanochemistry

“…By in situ FTIR analysis, it is determined that active oxygen species in the catalyst directly participate in the reaction. The prepared catalyst was stable with constant benzene conversion of 95% during 50 h. Similar research was conducted by Guo et al ( 2019 ) with eggshell-supported Ag catalyst. It was determined that optimal Ag concentration for this process was 19.9%, whereas the necessary oxidation temperature was lower (225°C) than in the case of Co 3 O 4 /eggshell-catalyzed process.…”

“…These studies have demonstrated that eggshell-based catalysts outperformed other types of support materials (i.e., commercial CaCO 3 ; Guo et al, 2019 ; Li et al, 2020 and oyster shell; Li et al, 2020 ) as well as pure NPs (Guo et al, 2019 ; Li et al, 2020 ). Moreover, Guo et al showed that Pt NPs/eggshell exhibited a more preferable catalytic activity compared to that of commercial 5Pt/C catalyst (Guo et al, 2020 ).…”

“…The hierarchical porous structure of eggshell also significantly contributes to the enhancement of overall catalytic performance as it increases the contact area between VOCs and NPs and enhances mass and energy transfer. Finally, it is worth mentioning that the fine-tuning of catalytic performance [i.e., turnover frequencies and the temperature for achieving 90% benzene conversion (T 90% )] of eggshell-based catalysts can be easily accomplished by the appropriate choice of parameters such as type of metal, metal loading, method of synthesis, calcination atmosphere, and temperature (Guo et al, 2019(Guo et al, , 2020Li et al, 2020).…”

Simple Recycling of Biowaste Eggshells to Various Calcium Phosphates for Specific Industries

“…Therefore, the use of these eggshells, collected greatly every day, as an alternative source of CaCO 3 , will help reduce the risk of microbiological and toxic problems, and may reduce the impact on the natural reserves of limestone, non-renewable natural sources. There are several extensive reviews of the applications of eggshells [9][10][11][12][13] . Several ways have been reported to manage eggshells waste typically destined for land ll and some others such as soil conditioner, fertilizer, animal feed, additive food, adsorbent, calcium supplement, paper manufacture, and material re-used through recycling, all having the potential to be more sustainable methods 3,14,15 .…”

Dual functional oyster shell-derived Ag/ZnO/CaCO3 nanocomposites with enhanced catalytic and antibacterial activities for water purification

“…[16][17][18][19] As a typical noble metal, Ag has successfully attracted extensive current research interest in the wastewater treatment eld, since Ag provides sufficient active sites for the degradation of harmful pollutants and accelerates the degradation of the pollutant. [20][21][22][23] By far, various kinds of synthetic strategies, such as electrochemical, decomposition, microwave assisted technology and wet chemical, have been designed for the fabrication of binary Ag/ZnO, but they are generally costly, ammable and toxic. [24][25][26][27][28][29][30] Therefore, developing an efficient and environmentally friendly route to prepare binary Ag/ZnO is urgently required.…”