Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater

Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater

Hierarchical hollow Mg-Al layered double hydroxide microspheres (HHMs) are successfully prepared by hydrothermal treatment in the presence of carbon dots (CDs). Morphology and structure of the as-prepared samples are characterized using XRD, SEM, FT-IR, and TEM techniques. The growth process of HHMs...

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Main Authors: Jia Zhigang, Han Cong, Chang Rui, Zhang Daqing
Format: Article
Language:English
Published: EDP Sciences 2021-01-01
Series:E3S Web of Conferences
Online Access:https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/45/e3sconf_eeaphs2021_02003.pdf
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spelling doaj-f8f4ec470bac4deb9fa2672aa64db8202021-06-11T07:21:20ZengEDP SciencesE3S Web of Conferences2267-12422021-01-012690200310.1051/e3sconf/202126902003e3sconf_eeaphs2021_02003Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewaterJia ZhigangHan CongChang RuiZhang DaqingHierarchical hollow Mg-Al layered double hydroxide microspheres (HHMs) are successfully prepared by hydrothermal treatment in the presence of carbon dots (CDs). Morphology and structure of the as-prepared samples are characterized using XRD, SEM, FT-IR, and TEM techniques. The growth process of HHMs has been investigated in detail, and Ostwald ripening mechanism is suggested for the hierarchical growth of HHMs. Adsorption isotherms and adsorption kinetics of HHMs for congo red (CR) are investigated. Langmuir and Temkin model are more fitted to the experimental data of CR isotherm adsorption. Adsorption kinetic data obeys the pseudo-second-order kinetic model. Moreover, thermodynamic parameters (ΔGo, ΔHo and ΔSo) show that the CR adsorption onto HHMs is an endothermic and spontaneous process. The as-prepared HHMs could be a potential adsorbent for wastewater treatment containing anion dyes.https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/45/e3sconf_eeaphs2021_02003.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Jia Zhigang
Han Cong
Chang Rui
Zhang Daqing
spellingShingle Jia Zhigang
Han Cong
Chang Rui
Zhang Daqing
Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
E3S Web of Conferences
author_facet Jia Zhigang
Han Cong
Chang Rui
Zhang Daqing
author_sort Jia Zhigang
title Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
title_short Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
title_full Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
title_fullStr Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
title_full_unstemmed Synthesis of carbon dots-assisted MgAl-LDH hollow microspheres with hierarchical structure for the effective removal of Congo red from wastewater
title_sort synthesis of carbon dots-assisted mgal-ldh hollow microspheres with hierarchical structure for the effective removal of congo red from wastewater
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2021-01-01
description Hierarchical hollow Mg-Al layered double hydroxide microspheres (HHMs) are successfully prepared by hydrothermal treatment in the presence of carbon dots (CDs). Morphology and structure of the as-prepared samples are characterized using XRD, SEM, FT-IR, and TEM techniques. The growth process of HHMs has been investigated in detail, and Ostwald ripening mechanism is suggested for the hierarchical growth of HHMs. Adsorption isotherms and adsorption kinetics of HHMs for congo red (CR) are investigated. Langmuir and Temkin model are more fitted to the experimental data of CR isotherm adsorption. Adsorption kinetic data obeys the pseudo-second-order kinetic model. Moreover, thermodynamic parameters (ΔGo, ΔHo and ΔSo) show that the CR adsorption onto HHMs is an endothermic and spontaneous process. The as-prepared HHMs could be a potential adsorbent for wastewater treatment containing anion dyes.
url https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/45/e3sconf_eeaphs2021_02003.pdf
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AT hancong synthesisofcarbondotsassistedmgalldhhollowmicrosphereswithhierarchicalstructurefortheeffectiveremovalofcongoredfromwastewater
AT changrui synthesisofcarbondotsassistedmgalldhhollowmicrosphereswithhierarchicalstructurefortheeffectiveremovalofcongoredfromwastewater
AT zhangdaqing synthesisofcarbondotsassistedmgalldhhollowmicrosphereswithhierarchicalstructurefortheeffectiveremovalofcongoredfromwastewater
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