Water treatment with CoZnAl-LDH and its mixed metal oxide
CoZnAl-layered double hydroxide (LDH) was synthesized by homogeneous co-precipitation. CoZnAl-Mixed Metal Oxide (MMO) was prepared by calcining the LDH. The samples' structure and morphology were studied by analytical techniques including X-ray diffraction, N2 adsorption-desorption isotherm, sc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-10-01
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| Series: | Water Practice and Technology |
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| Online Access: | http://wpt.iwaponline.com/content/16/4/1386 |
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| author | Mina Sharifi-Bonab Soheil Aber Dariush Salari Fatemeh Khodam |
| author_facet | Mina Sharifi-Bonab Soheil Aber Dariush Salari Fatemeh Khodam |
| author_sort | Mina Sharifi-Bonab |
| collection | DOAJ |
| description | CoZnAl-layered double hydroxide (LDH) was synthesized by homogeneous co-precipitation. CoZnAl-Mixed Metal Oxide (MMO) was prepared by calcining the LDH. The samples' structure and morphology were studied by analytical techniques including X-ray diffraction, N2 adsorption-desorption isotherm, scanning electron microscopy and UV–visible spectroscopy. Acid orange 7 (AO7) adsorption by as-prepared samples was studied. CoZnAl-MMO showed 526.32 mg/g adsorption capacity, higher than that of CoZnAl-LDH, 243.9 mg/g. Kinetic studies confirmed the pseudo-second-order and pseudo-first-order AO7 adsorption kinetics of the LDH and MMO, respectively. AO7 adsorption onto both LDH and MMO fitted the Langmuir isotherm model well. Band gap calculation confirmed the ability of this nano-MMO to operate in the visible light region. It displayed synergetic adsorption-photocatalytic performance under visible light and the removal efficiency was about 97%. HIGHLIGHTS
The CoZnAl-LDH with high surface area was synthesized.;
The LDH adsorbed acid orange 7 from aqueous solution effectively.;
The CoZnAl-MMO was prepared via calcination of the CoZnAl-LDH.;
The MMO showed photocatalytic activity in visible light and high adsorption capacity towards AO7.; |
| first_indexed | 2024-12-17T10:13:16Z |
| format | Article |
| id | doaj.art-ec1d809be5b04a79aaa20aaf4cc62cbc |
| institution | Directory Open Access Journal |
| issn | 1751-231X |
| language | English |
| last_indexed | 2024-12-17T10:13:16Z |
| publishDate | 2021-10-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Practice and Technology |
| spelling | doaj.art-ec1d809be5b04a79aaa20aaf4cc62cbc2022-12-21T21:52:59ZengIWA PublishingWater Practice and Technology1751-231X2021-10-011641386139610.2166/wpt.2021.079079Water treatment with CoZnAl-LDH and its mixed metal oxideMina Sharifi-Bonab0Soheil Aber1Dariush Salari2Fatemeh Khodam3 Research Laboratory of Environmental Protection Technology (RLEPT), Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran Research Laboratory of Environmental Protection Technology (RLEPT), Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran Research Laboratory of Environmental Protection Technology (RLEPT), Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran CoZnAl-layered double hydroxide (LDH) was synthesized by homogeneous co-precipitation. CoZnAl-Mixed Metal Oxide (MMO) was prepared by calcining the LDH. The samples' structure and morphology were studied by analytical techniques including X-ray diffraction, N2 adsorption-desorption isotherm, scanning electron microscopy and UV–visible spectroscopy. Acid orange 7 (AO7) adsorption by as-prepared samples was studied. CoZnAl-MMO showed 526.32 mg/g adsorption capacity, higher than that of CoZnAl-LDH, 243.9 mg/g. Kinetic studies confirmed the pseudo-second-order and pseudo-first-order AO7 adsorption kinetics of the LDH and MMO, respectively. AO7 adsorption onto both LDH and MMO fitted the Langmuir isotherm model well. Band gap calculation confirmed the ability of this nano-MMO to operate in the visible light region. It displayed synergetic adsorption-photocatalytic performance under visible light and the removal efficiency was about 97%. HIGHLIGHTS The CoZnAl-LDH with high surface area was synthesized.; The LDH adsorbed acid orange 7 from aqueous solution effectively.; The CoZnAl-MMO was prepared via calcination of the CoZnAl-LDH.; The MMO showed photocatalytic activity in visible light and high adsorption capacity towards AO7.;http://wpt.iwaponline.com/content/16/4/1386adsorptionlayered double hydroxidemixed metal oxidephotocatalysis |
| spellingShingle | Mina Sharifi-Bonab Soheil Aber Dariush Salari Fatemeh Khodam Water treatment with CoZnAl-LDH and its mixed metal oxide Water Practice and Technology adsorption layered double hydroxide mixed metal oxide photocatalysis |
| title | Water treatment with CoZnAl-LDH and its mixed metal oxide |
| title_full | Water treatment with CoZnAl-LDH and its mixed metal oxide |
| title_fullStr | Water treatment with CoZnAl-LDH and its mixed metal oxide |
| title_full_unstemmed | Water treatment with CoZnAl-LDH and its mixed metal oxide |
| title_short | Water treatment with CoZnAl-LDH and its mixed metal oxide |
| title_sort | water treatment with coznal ldh and its mixed metal oxide |
| topic | adsorption layered double hydroxide mixed metal oxide photocatalysis |
| url | http://wpt.iwaponline.com/content/16/4/1386 |
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