Photocatalytic performance of (Zn,Me)-SnO₂ nanoparticles (Me= Nb⁵⁺ or W⁶⁺) under UV light for efficiently degradation of organic dye pollutants

Author(s)

Lustosa, Glauco Meireles Mascarenhas Morandi ; Nogueira, Marcelo Vianna ; Perazolli, Leinig Antonio ; Zaghete, Maria Aparecida

• Document type: Journal article
• Source: JOURNAL OF THE INDIAN CHEMICAL SOCIETY; v. 101, n. 10, p. 8-pg., 2024-07-14.

Abstract

In this study (Zn,Nb)-doped SnO2 and (Zn,W)-doped SnO2 were synthetized using chemical route by calcination at 600 degrees C/2 h and milling at 500 rpm/1 h to verify its behavior as a photocatalyst. The powders showed high surface area: 57.1 m2/g for (Zn,Nb)-doped SnO2 and 74.3 m2/g for (Zn,W)-doped SnO2, both showed 10-25 nm of average diameter and rutile crystalline phase after morphological and structural characterizations. UV-vis spectroscopy indicated a band gap of 3.53 eV for (Zn,Nb)-SnO2 and 3.35 for (Zn,W)-SnO2. The photocatalytic activity was verified through the decomposition of Rodhamine B (RhB) aqueous solution under ultraviolet light radiation of 9W. After 120 min the efficiency of (Zn,Nb)-SnO2 was 68.5 % and for (Zn,W)-SnO2 was 71.1 %. Using a UV-lamp of 11W the efficiency in photodiscoloration of RhB aqueous solution increased to 83.2 % with (Zn,W)-doped SnO2 powder in a shorter irradiation time (90 min), indicating its potential use as nanostructured photocatalyst ceramic powder. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC