Facile Ion Exchange Synthesis of Ag, Cu, and Sn Incorporated Defect Pyrochlore K2Ta2O6 towards Visible-Light-Responsive Photocatalytic Activity

被引：8
作者：
Angineni, Rani [1 ]
Angineni, Jyothsna [1 ]
Veldurthi, Naveen Kumar [2 ]
Venkataswamy, Perala [1 ]
Vithal, Muga [1 ]
机构：
[1] Osmania Univ, Dept Chem, Hyderabad 500007, India
[2] Natl Inst Technol, Dept Chem, Jamshedpur 831014, Bihar, India
来源：
CHEMISTRYSELECT | 2021年 / 6卷 / 32期
关键词：
Absorption; Defect pyrochlore; ion exchange; methylene blue degradation; photocatalysis; H-2; DEGRADATION; COMPOSITE; O-2;
D O I：
10.1002/slct.202102147
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel series of Ag, Cu, and Sn ions incorporated defect pyrochlore K2Ta2O6 photocatalysts were successfully synthesized by facile ion exchange method whereas pristine K2Ta2O6 was prepared by conventional hydrothermal method. All the samples were amply characterized by powder X-ray Diffraction (PXRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) techniques to understand their phase formation, optical properties, morphology, and chemical composition. The absorption edge of ion-exchanged samples was red-shifted remarkably, therefore they would respond under visible light. The photocatalytic activity of all samples was assessed by studying the degradation of methylene blue (MB) dye under visible light irradiation. All samples show activity towards MB degradation and Cu-K2Ta2O6 exhibited superior photocatalytic performance (86 %) compared to others. Different scavenger tests were carried out to identify the reactive species, accountable for the decontamination of aqueous dye solution. Moreover, photoluminescence (PL) measurements were carried out to correlate the separation efficacy of photoinduced charge carriers and photocatalytic performance of all samples. This work may provide valuable information for exploring the as-prepared photocatalysts towards more energy and environmental applications.
引用
收藏
页码：8306 / 8314
页数：9
相关论文
共 23 条
[11]   Ferroelectric properties of KNbO3/KTaO3 superlattices by atomic-level simulation [J].
Sepliarsky, M ;
Phillpot, SR ;
Wolf, D ;
Stachiotti, MG ;
Migoni, RL .
JOURNAL OF APPLIED PHYSICS, 2001, 90 (09) :4509-4519
[12]   REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].
SHANNON, RD .
ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767
[13]   Photocatalytic water splitting on hydrated layered perovskite tantalate A2SrTa2O7•nH2O ( A = H, K, and Rb) [J].
Shimizu, K ;
Tsuji, Y ;
Hatamachi, T ;
Toda, K ;
Kodama, T ;
Sato, M ;
Kitayama, Y .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2004, 6 (05) :1064-1069
[14]   Solar Induced Photocatalytic Degradation of Methylene Blue by CdS/Ag2O Nanocomposites [J].
Sophia, P. Joice ;
Balaji, D. ;
Peters, T. James Caleb ;
Chander, D. Sathish ;
Rishaban, S. Vishwath ;
Shanthi, P. Vijaya ;
Nagavenkatesh, K. R. ;
Kumar, M. Rajesh .
CHEMISTRYSELECT, 2020, 5 (14) :4125-4135
[15]   Facile Room Temperature Ion-Exchange Synthesis of Sn2+ Incorporated Pyrochlore-Type Oxides and Their Photocatalytic Activities [J].
Uma, S. ;
Singh, Jyoti ;
Thakral, Vaishali .
INORGANIC CHEMISTRY, 2009, 48 (24) :11624-11630
[16]   Cocatalyst free Z-schematic enhanced H2 evolution over LaVO4/BiVO4 composite photocatalyst using Ag as an electron mediator [J].
Veldurthi, Naveen Kumar ;
Eswar, Neerugatti KrishnaRao ;
Singh, Satyapaul A. ;
Madras, Giridhar .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2018, 220 :512-523
[17]   Interplay of Photoabsorption, Electronic Structure, and Recombination Rate of Charge Carriers on Visible Light Driven Photocatalytic Activity of Cu- and N-Doped Ba3V2O8 [J].
Veldurthi, Naveen Kumar ;
Bandipalli, Priyanka ;
Ravi, Gundeboina ;
Reddy, Jitta Raju ;
Palla, Suresh ;
Bhanuprakash, Kotamarthi ;
Vithal, Muga .
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2014, (32) :5585-5595
[18]   Facile Ion-Exchange Synthesis and Visible Light Photocatalytic Studies of Cu2+, Sn2+, and Ag+-Substituted LiMg0.5Ti0.5O2 [J].
Veldurthi, Naveen Kumar ;
Ravi, Gundeboina ;
Reddy, Jitta Raju ;
Palla, Suresh ;
Muniratnam, Nagegownivari R. ;
Prasad, Guduru ;
Vithal, Muga .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2014, 97 (06) :1829-1836
[19]   Nanostructured KTaTeO6 and Ag-doped KTaTeO6 Defect Pyrochlores: Promising Photocatalysts for Dye Degradation and Water Splitting [J].
Venkataswamy, Perala ;
Reddy, C. H. Sudhakar ;
Gundeboina, Ravi ;
Sadanandam, Gullapelli ;
Veldurthi, Naveen Kumar ;
Vithal, M. .
ELECTRONIC MATERIALS LETTERS, 2018, 14 (04) :446-460
[20]   Synthesis of a novel tunnel Na0.5K0.1MnO2 composite as a cathode for sodium ion batteries [J].
Wu, Zhen-Guo ;
Zhong, Yan-Jun ;
Li, Jun-Tao ;
Wang, Kai ;
Guo, Xiao-Dong ;
Huang, Ling ;
Zhong, Ben-He ;
Sun, Shi-Gang .
RSC ADVANCES, 2016, 6 (59) :54404-54409
123