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Dye wastewater treatment driven by cyclically heating/ cooling the poled (K0.5Na0.5)NbO3 pyroelectric crystal catalyst
Ma, JP; Jia, YM; Chen, L; Zheng, YQ; Wu, Z; Luo, WS; Jiang, MH; Cui, XZ; Li, YX
2020-12-10
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
SubtypeArticle
AbstractIn this work, a novel pyroelectric catalysis technique is developed for decomposition of dye wastewater using the lead-free (K0.5Na0.5)NbO3 pyroelectric crystal catalyst under the environmental temperature variation. 91.2% of rhodamine B dye can be decomposed after (K0.5Na0.5)NbO3 pyroelectric catalyst undergoing 100 cold-hot 30-60 degrees C cycles. The catalytic activity can be obviously influenced by the poling electric field of catalyst materials. With the increase of the poling electric field from 0 to 4.5 kV/mm, the dye decomposition ratio correspondingly increases from 3.3% to 91.2%. The poling treatment is helpful to enhance the polarization of the (K0.5Na0.5)NbO3 crystal, which can also result in the increase of the pyroelectric coefficient, yielding to the enhancement of pyroelectric catalysis. The scavenger experiments are carried out, in which the main active species in the pyroelectric catalysis are found to be superoxide radicals, hydroxyl radicals and holes. The effects of various factors including dye concentration, catalyst dosage, pH and type of dyes on pyroelectric catalysis performance of (K0.5Na0.5)NbO3 are also investigated to obtain the optimum condition. The results of three consecutive recycling-utilization tests indicate that (K0.5Na0.5)NbO3 crystal possesses good chemical stability. With these advantages of high dye decomposition ratio and good recycling utilization, (K0.5Na0.5)NbO3 crystal is potential in developing the novel pyroelectric catalysis technique for decomposition of dye wastewater through utilizing the thermal energy from the environmental cold-hot temperature variation in future. (C) 2020 Elsevier Ltd. All rights reserved.
DOI10.1016/j.jclepro.2020.124218
WOS KeywordENHANCED PHOTOCATALYTIC ACTIVITY ; PIEZOELECTRIC PROPERTIES ; BATIO3 NANOFIBERS ; HIGH-EFFICIENCY ; RHODAMINE-B ; DEGRADATION ; TEMPERATURE ; NANOPARTICLES ; ENERGY ; MECHANISM
Language英语
WOS Research AreaScience & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
PublisherELSEVIER SCI LTD
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27590
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Ma, JP,Jia, YM,Chen, L,et al. Dye wastewater treatment driven by cyclically heating/ cooling the poled (K0.5Na0.5)NbO3 pyroelectric crystal catalyst[J]. JOURNAL OF CLEANER PRODUCTION,2020.
APA Ma, JP.,Jia, YM.,Chen, L.,Zheng, YQ.,Wu, Z.,...&Li, YX.(2020).Dye wastewater treatment driven by cyclically heating/ cooling the poled (K0.5Na0.5)NbO3 pyroelectric crystal catalyst.JOURNAL OF CLEANER PRODUCTION.
MLA Ma, JP,et al."Dye wastewater treatment driven by cyclically heating/ cooling the poled (K0.5Na0.5)NbO3 pyroelectric crystal catalyst".JOURNAL OF CLEANER PRODUCTION (2020).
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