Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes
In this work, controllable preparation of micro/nanostructured bismuth ferrites (BFOs) were used to investigate multifarious heterogeneous catalyses, including Fenton/Fenton-like reaction, photocatalysis, photo-Fenton oxidation, and peroxymonosulfate (PMS) activation. Results showed that BFO can be...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/142544 |
| _version_ | 1826120017909907456 |
|---|---|
| author | Hu, Zhong-Ting Oh, Wen-Da Liu, Yiquan Yang, En-Hua Lim, Teik-Thye |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Hu, Zhong-Ting Oh, Wen-Da Liu, Yiquan Yang, En-Hua Lim, Teik-Thye |
| author_sort | Hu, Zhong-Ting |
| collection | NTU |
| description | In this work, controllable preparation of micro/nanostructured bismuth ferrites (BFOs) were used to investigate multifarious heterogeneous catalyses, including Fenton/Fenton-like reaction, photocatalysis, photo-Fenton oxidation, and peroxymonosulfate (PMS) activation. Results showed that BFO can be used asa novel catalyst to activate switchable catalytic degradation of organic matters. Additionally, a novel catalytic system for degradation of organic pollutants, which integrating all-above heterogeneous catalyses is denoted as BFO/H2O2/PMS hybrid reaction, is introduced for the first time. BFO/H2O2/PMS system effectively degraded>99% for both methyl orange (MO) and sulfamethoxazole (SMX) within 60min, which shows better efficiency than above BFO-driven catalyses. The major SMX degradation pathway in BFO/H2O2/PMS system is proposed via detecting intermediates using LC/MS/MS. It was found that catalytic activities of BFOs are in the order of BFO-L (co-precipitation, micro/nanosize, single crystals exposing facet (001))>BFO-H (hydrothermal, nanocluster with a higher surface area than other BFOs)>BFO-C (fabricated using calcination process, microsize), which demonstrated that crystallographic orientation is more significant in heterogeneous catalyses than specific surface area at micro/nanoscale. Besides, the required H2O2 consumption for achieving 99% TOC removal was identified in BFO-driven photo-Fenton oxidation. The other effects on degradation efficiency, such as H2O2 dosage and pH, were investigated as well. In Fenton/Fenton-like reaction, reaction conditions suggested are ∼61.5mM H2O2 dosage and pH≥4.5 to avoid quenching of HO into HO2 by excessive H2O2 and Fe leaching. |
| first_indexed | 2024-10-01T05:09:20Z |
| format | Journal Article |
| id | ntu-10356/142544 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:09:20Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1425442021-01-07T03:21:29Z Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes Hu, Zhong-Ting Oh, Wen-Da Liu, Yiquan Yang, En-Hua Lim, Teik-Thye School of Civil and Environmental Engineering Environmental Chemistry & Materials Centre Energy Research Institute @ NTU (ERI@N) Nanyang Environment and Water Research Institute Research Techno Plaza Engineering::Civil engineering Hybrid Catalytic Oxidation Wastewater Purification In this work, controllable preparation of micro/nanostructured bismuth ferrites (BFOs) were used to investigate multifarious heterogeneous catalyses, including Fenton/Fenton-like reaction, photocatalysis, photo-Fenton oxidation, and peroxymonosulfate (PMS) activation. Results showed that BFO can be used asa novel catalyst to activate switchable catalytic degradation of organic matters. Additionally, a novel catalytic system for degradation of organic pollutants, which integrating all-above heterogeneous catalyses is denoted as BFO/H2O2/PMS hybrid reaction, is introduced for the first time. BFO/H2O2/PMS system effectively degraded>99% for both methyl orange (MO) and sulfamethoxazole (SMX) within 60min, which shows better efficiency than above BFO-driven catalyses. The major SMX degradation pathway in BFO/H2O2/PMS system is proposed via detecting intermediates using LC/MS/MS. It was found that catalytic activities of BFOs are in the order of BFO-L (co-precipitation, micro/nanosize, single crystals exposing facet (001))>BFO-H (hydrothermal, nanocluster with a higher surface area than other BFOs)>BFO-C (fabricated using calcination process, microsize), which demonstrated that crystallographic orientation is more significant in heterogeneous catalyses than specific surface area at micro/nanoscale. Besides, the required H2O2 consumption for achieving 99% TOC removal was identified in BFO-driven photo-Fenton oxidation. The other effects on degradation efficiency, such as H2O2 dosage and pH, were investigated as well. In Fenton/Fenton-like reaction, reaction conditions suggested are ∼61.5mM H2O2 dosage and pH≥4.5 to avoid quenching of HO into HO2 by excessive H2O2 and Fe leaching. 2020-06-24T03:35:17Z 2020-06-24T03:35:17Z 2018 Journal Article Hu, Z.-T., Oh, W.-D., Liu, Y., Yang, E.-H., & Lim, T.-T. (2018). Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes. Journal of colloid and interface science, 509, 502-514. doi:10.1016/j.jcis.2017.09.035 0021-9797 https://hdl.handle.net/10356/142544 10.1016/j.jcis.2017.09.035 28923748 2-s2.0-85029478268 509 502 514 en Journal of colloid and interface science © 2017 Elsevier Inc. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Hybrid Catalytic Oxidation Wastewater Purification Hu, Zhong-Ting Oh, Wen-Da Liu, Yiquan Yang, En-Hua Lim, Teik-Thye Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title | Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title_full | Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title_fullStr | Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title_full_unstemmed | Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title_short | Controllable mullite bismuth ferrite micro/nanostructures with multifarious catalytic activities for switchable/hybrid catalytic degradation processes |
| title_sort | controllable mullite bismuth ferrite micro nanostructures with multifarious catalytic activities for switchable hybrid catalytic degradation processes |
| topic | Engineering::Civil engineering Hybrid Catalytic Oxidation Wastewater Purification |
| url | https://hdl.handle.net/10356/142544 |
| work_keys_str_mv | AT huzhongting controllablemullitebismuthferritemicronanostructureswithmultifariouscatalyticactivitiesforswitchablehybridcatalyticdegradationprocesses AT ohwenda controllablemullitebismuthferritemicronanostructureswithmultifariouscatalyticactivitiesforswitchablehybridcatalyticdegradationprocesses AT liuyiquan controllablemullitebismuthferritemicronanostructureswithmultifariouscatalyticactivitiesforswitchablehybridcatalyticdegradationprocesses AT yangenhua controllablemullitebismuthferritemicronanostructureswithmultifariouscatalyticactivitiesforswitchablehybridcatalyticdegradationprocesses AT limteikthye controllablemullitebismuthferritemicronanostructureswithmultifariouscatalyticactivitiesforswitchablehybridcatalyticdegradationprocesses |