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Transition metal ion (Ni<sup>2+</sup>, Cu<sup>2+</sup> and Zn2+) doped defect pyrochlore, KTaTeO<sub>6</sub>: Synthesis, characterization and photocatalytic studies

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Title Statement Transition metal ion (Ni<sup>2+</sup>, Cu<sup>2+</sup> and Zn2+) doped defect pyrochlore, KTaTeO<sub>6</sub>: Synthesis, characterization and photocatalytic studies
 
Added Entry - Uncontrolled Name Sudheera, M ; Department of Chemical Engineering, RVR and JC College of Engineering, Chowdavaram, Guntur-522 019 Andhra Pradesh
Venkataswamy, P ; Department of Chemistry Osmania University Hyderabad-500 007 Telangana
Ramaswamy, K ; Centre for Materials for Electronics Technology (C-MET), Cherlapally, HCL (PO), Hyderabad -500 051 Telangana
Ravi, G ; Department of Chemistry Osmania University Hyderabad-500 007 Telangana
Chittibabu, N ; Department of Chemical Engineering, Andhra University, Visakhapatnam - 530 003 Andhra Pradesh
Vithal, M ; Department of Chemistry Osmania University Hyderabad-500 007 Telangana
University Grants Commission (UGC), India; The Science and Engineering Research Board (SERB), India; CSIR, India
 
Uncontrolled Index Term spectroscopy;catalysis
KTaTeO6, Transition metal ions, Ion-exchange method, Bandgap Energy, MB degradation, •OH radicals
 
Summary, etc. One of the strategies to decrease the bandgap energy and increase the optical absorption ofthe catalysts is to dope with transition metal ions. In this paper, the results obtained for thedegradation of methylene blue (MB) pollutant in the presence of M<sup>2+</sup> (M = Ni, Cu, and Zn) doped KTaTeO<sub>6</sub> (here after abbreviated as M-KTTO) upon visible light irradiation are presented.The parent KTaTeO<sub>6</sub> and the M<sup>2+</sup> (M = Ni, Cu, and Zn) doped KTaTeO<sub>6</sub> were prepared by solidstate and ion-exchange methods, respectively. All the samples were characterized by XRD,SEM/EDX, FT-IR, UV-Vis DRS, XPS, and PL techniques. The metal ion doping in place of K<sup>+</sup>has influenced the electronic and optical properties considerably. The doping of M<sup>2+</sup> into KTTOlattice has narrowed the bandgap energy, increased the visible light absorbance leading to higherphotocatalytic activity. The M-KTTO materials show higher photocatalytic activity compared toparent KTTO, in particularly Cu-KTTO. The scavenging experiments indicate that <sup>•</sup>OH radicalsare the main active species involved in the photodegradation of MB. The Cu-KTTO ischemically stable and can be used at least up to five cycles. The mechanistic pathway of MBdegradation was proposed over Cu-KTTO.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2021-09-22 10:23:28
 
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http://op.niscair.res.in/index.php/IJCA/article/view/43949
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 60, ##issue.no## 6 (2021): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/43949/465548167
http://op.niscair.res.in/index.php/IJCA/article/download/43949/465548168
http://op.niscair.res.in/index.php/IJCA/article/download/43949/465548169
http://op.niscair.res.in/index.php/IJCA/article/download/43949/465548170
 
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