A Novel Approach for Generation of Oxygen Vacancies in Trirutile MnSb2O6 and Their Impact on Photocatalytic Degradation of MO Dye. Issue 7 (29th December 2022)

• Record Type: Journal Article
• Authors: Sunku, Manasa; Venkataswamy, Perala; Bindu, Gaddameedi Hima; Srilekha, Pallati; Srinivas, M.; Vithal, M.
• Is Part Of: European journal of inorganic chemistry. Volume 26:Issue 7(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-29
• Subjects: electron spin resonance -- hydroxyl radicals -- manganese -- metathesis -- oxygen vacancies -- photoluminescence; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.202200550
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Visible light‐driven photocatalysis has gained much attention due to its light‐harnessing characteristics and is extensively used in wastewater remediation. This paper presents a novel oxygen‐deficient manganese antimonate, MnSb2 O6‐x, with a trirutile structure as an effective visible‐light‐driven photocatalyst for dye degradation. The synthesized samples were subjected to XRD, UV‐Vis DRS, SEM‐EDS, Raman, XPS, and PL analyses to study their physic chemical properties. The influence of sequential or single heating during the preparation method on the generation of oxygen vacancies is evaluated using UV‐Vis DRS, XPS, ESR, and Raman techniques. The oxygen‐deficient MnSb2 O6 could achieve up to 85 % of MO degradation in 180 min under visible light irradiation, and its reusability up to six cycles was also investigated. In addition, the mechanism of dye degradation was supported with a scavenger test, and the degradation activities are correlated to the electron‐hole pair separation as convinced from the PL spectra. The simple and unique method of oxygen vacancy generation can inspire the development of antimonates with oxygen deficiencies, which have significant scope of application in environmental and energy conservation. Abstract : A novel oxygen deficient MnSb2 O6‐x has been prepared with varied oxygen vacancies by altering the calcination process and compared with pristine MnSb2 O6 .