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Efficient photocatalytic removal of aqueous NH4+-NH3 by palladium-modified nitrogen-doped titanium oxide nanoparticles under visible light illumination, even in weak alkaline solutions
D. C.; Sun Sun, W. Z.; Yang, W. Y.; Li, Q.; Shang, J. K.
2015
Source PublicationChemical Engineering Journal
ISSN1385-8947
Volume264Pages:728-734
AbstractAqueous ammonium-ammonia (NH4+-NH3) is a commonly found pollutant in industrial and domestic wastewater, which poses a great threat to both the environment and the human health. Photocatalytic treatment had been proved to be an efficient approach to oxidize aqueous NH4+-NH3 for its removal. However, most current researches still suffer from the requirements of UV illumination and strong alkaline environment, low removal rates, and high ratios of toxic oxidation by-products of NO3- and NO2-. In this study, palladium-modified nitrogen-doped titanium oxide (TiO2-xNx/PdO) nanoparticles were synthesized by a simple sol-gel process, which demonstrated an effective photocatalytic removal of aqueous NH4+-NH3 under visible light illumination. By optimizing the reaction conditions, a high removal rate of over 90% could be achieved by TiO2-xNx/PdO nanoparticles under only visible light illumination with the major product of N-2, and the production of toxic photocatalytic oxidation by-products of NO and NO was minimized. The real time solution pH was found to be critical for the photocatalytic oxidation of aqueous NH4+-NH3. By keeping the solution pH constantly at the effective photocatalytic removal of aqueous NH4+-NH3 in a weak alkaline solution was achieved for the first time. (C) 2014 Elsevier B.V. All rights reserved.
description.department[sun, dechen ; sun, wuzhu ; yang, weiyi ; li, qi ; shang, jian ku] chinese acad sci, shenyang natl lab mat sci, inst met res, environm funct mat div, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; li, q (reprint author), 72 wenhua rd, shenyang 110016, liaoning, peoples r china. ; qiii@imr.ac.cn
KeywordAqueous Ammonium-ammonia Palladium-modified Nitrogen-doped Titanium Oxide Photocatalytic Removal Visible-light Weak Alkaline Environment Azo-dye Semiconductor Photocatalysis Catalyst Concentration Water-treatment Porous Nickel Waste-water Oxidation Tio2 Degradation Ammonia
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73921
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
D. C.,Sun Sun, W. Z.,Yang, W. Y.,et al. Efficient photocatalytic removal of aqueous NH4+-NH3 by palladium-modified nitrogen-doped titanium oxide nanoparticles under visible light illumination, even in weak alkaline solutions[J]. Chemical Engineering Journal,2015,264:728-734.
APA D. C.,Sun Sun, W. Z.,Yang, W. Y.,Li, Q.,&Shang, J. K..(2015).Efficient photocatalytic removal of aqueous NH4+-NH3 by palladium-modified nitrogen-doped titanium oxide nanoparticles under visible light illumination, even in weak alkaline solutions.Chemical Engineering Journal,264,728-734.
MLA D. C.,et al."Efficient photocatalytic removal of aqueous NH4+-NH3 by palladium-modified nitrogen-doped titanium oxide nanoparticles under visible light illumination, even in weak alkaline solutions".Chemical Engineering Journal 264(2015):728-734.
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