Influence of structural and surface properties of Nb2O5 pellets on methylene blue adsorption and adsorbent reuse capacity

Abstract

of Nb 2 O 5 combined with Al 2 O 3 on a solid silica matrix prepared by a sol-gel process as an adsorbent for Cd 2+ ions. The adsorbent exhibited high porosity and specific surface area (323 m 2 .g -1 ). The high specific surface area contributed to increasing the accessibility of adsorbent sites to Cd 2+ ions. Furthermore, the porous silica material modified with metal oxides had high stability and showed promise for the development of new materials that adsorb metal ions. In a similar line of research, Diniz et al. [21] combined Nb 2 O 5 with ZnO dispersed on a silica matrix by the sol-gel method for the adsorption of Co 2+ ions in water and food samples. The material exhibited high surface area and had a maximum adsorption capacity of 0.518 mg.g -1 , showing potential as an adsorbing agent. Cavalcanti et al. [6] used zeolite-based adsorbents