skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Building novel Ag/CeO{sub 2} heterostructure for enhancing photocatalytic activity

Abstract

Highlights: • Ag nanoparticle is designed to building Schottky heterojunction on CeO{sub 2} nanocube. • The photocatalytic activity of Ag/CeO{sub 2} heterostructure is much enhanced. • 95.33% of MB can be effectively degraded within half an hour. • Ag as acceptor of photoelectrons blocks the recombination of electron–hole pairs. - Abstract: Stable and recyclable photocatalysts with high efficiency to degrade organic contamination are important and widely demanded under the threat of the environment pollution. Ag/CeO{sub 2} heterostructure is designed as a photocatalyst to degrade organic dye under the simulated sunlight. The catalytic activity of CeO{sub 2} nanocubes (NCs) to degrade methylene blue (MB) is obviously enhanced when Ag nanoparticles (NPs) are deposited on the surface of them. The weight ratio of Ag and CeO{sub 2} in forming high efficiency catalyst, the amount of Ag/CeO{sub 2} catalyst used in degradation process, and the dye concentration and pH value of the initial MB solution are examined systematically. 95.33% of MB can be effectively degraded within half an hour when 50 mg of Ag/CeO{sub 2} catalyst in an optimal weight ratio of 1:3, is added to the 100 mL of MB solution (c{sub 0} = 1 × 10{sup −5} mol L{sup −1}, pHmore » 6.2). The mechanism of the enhanced catalytic activity of Ag/CeO{sub 2} heterostructure is discussed. The photocatalytic degradation rate is found to obey pseudo-first-order kinetics equations according to Langmuir–Hinshelwood model. The intermediate products in different stages during the degradation of MB are analyzed.« less

Authors:
; ;  [1];  [1]; ;  [1];  [1];  [2]
  1. Department of Applied Physics, Chongqing University, Chongqing 400044 (China)
  2. (Pakistan)
Publication Date:
OSTI Identifier:
22475777
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 65; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATALYSTS; CERIUM OXIDES; DECOMPOSITION; DEMAND; DYES; EFFICIENCY; HETEROJUNCTIONS; HOLES; INTERFACES; NANOPARTICLES; PHOTOCATALYSIS; POLLUTION; RECOMBINATION; SILVER; SIMULATION; SURFACES; SYNTHESIS

Citation Formats

Leng, Qiang, Yang, Dezhi, Yang, Qi, Hu, Chenguo, E-mail: hucg@cqu.edu.cn, Kang, Yue, Wang, Mingjun, Hashim, Muhammad, and Applied Physics Department, Federal Urdu University of Arts Science and Technology, Islamabad. Building novel Ag/CeO{sub 2} heterostructure for enhancing photocatalytic activity. United States: N. p., 2015. Web. doi:10.1016/J.MATERRESBULL.2015.02.008.
Leng, Qiang, Yang, Dezhi, Yang, Qi, Hu, Chenguo, E-mail: hucg@cqu.edu.cn, Kang, Yue, Wang, Mingjun, Hashim, Muhammad, & Applied Physics Department, Federal Urdu University of Arts Science and Technology, Islamabad. Building novel Ag/CeO{sub 2} heterostructure for enhancing photocatalytic activity. United States. doi:10.1016/J.MATERRESBULL.2015.02.008.
Leng, Qiang, Yang, Dezhi, Yang, Qi, Hu, Chenguo, E-mail: hucg@cqu.edu.cn, Kang, Yue, Wang, Mingjun, Hashim, Muhammad, and Applied Physics Department, Federal Urdu University of Arts Science and Technology, Islamabad. Fri . "Building novel Ag/CeO{sub 2} heterostructure for enhancing photocatalytic activity". United States. doi:10.1016/J.MATERRESBULL.2015.02.008.
@article{osti_22475777,
title = {Building novel Ag/CeO{sub 2} heterostructure for enhancing photocatalytic activity},
author = {Leng, Qiang and Yang, Dezhi and Yang, Qi and Hu, Chenguo, E-mail: hucg@cqu.edu.cn and Kang, Yue and Wang, Mingjun and Hashim, Muhammad and Applied Physics Department, Federal Urdu University of Arts Science and Technology, Islamabad},
abstractNote = {Highlights: • Ag nanoparticle is designed to building Schottky heterojunction on CeO{sub 2} nanocube. • The photocatalytic activity of Ag/CeO{sub 2} heterostructure is much enhanced. • 95.33% of MB can be effectively degraded within half an hour. • Ag as acceptor of photoelectrons blocks the recombination of electron–hole pairs. - Abstract: Stable and recyclable photocatalysts with high efficiency to degrade organic contamination are important and widely demanded under the threat of the environment pollution. Ag/CeO{sub 2} heterostructure is designed as a photocatalyst to degrade organic dye under the simulated sunlight. The catalytic activity of CeO{sub 2} nanocubes (NCs) to degrade methylene blue (MB) is obviously enhanced when Ag nanoparticles (NPs) are deposited on the surface of them. The weight ratio of Ag and CeO{sub 2} in forming high efficiency catalyst, the amount of Ag/CeO{sub 2} catalyst used in degradation process, and the dye concentration and pH value of the initial MB solution are examined systematically. 95.33% of MB can be effectively degraded within half an hour when 50 mg of Ag/CeO{sub 2} catalyst in an optimal weight ratio of 1:3, is added to the 100 mL of MB solution (c{sub 0} = 1 × 10{sup −5} mol L{sup −1}, pH 6.2). The mechanism of the enhanced catalytic activity of Ag/CeO{sub 2} heterostructure is discussed. The photocatalytic degradation rate is found to obey pseudo-first-order kinetics equations according to Langmuir–Hinshelwood model. The intermediate products in different stages during the degradation of MB are analyzed.},
doi = {10.1016/J.MATERRESBULL.2015.02.008},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 65,
place = {United States},
year = {2015},
month = {5}
}