SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water
In this study, we describe synthesis and characterization of a floating photocatalyst for water treatment consisting of a light substrate coated by SiO2/TiO2 composite. Three supports of natural origin were used: natural cork, expanded clay (Liapor), and volcanic porous glass (Sorbix). The photoacti...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/2634398 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832553698367111168 |
|---|---|
| author | Hana Bíbová Lenka Hykrdová Hiep Hoang Milan Eliáš Jaromír Jirkovský |
| author_facet | Hana Bíbová Lenka Hykrdová Hiep Hoang Milan Eliáš Jaromír Jirkovský |
| author_sort | Hana Bíbová |
| collection | DOAJ |
| description | In this study, we describe synthesis and characterization of a floating photocatalyst for water treatment consisting of a light substrate coated by SiO2/TiO2 composite. Three supports of natural origin were used: natural cork, expanded clay (Liapor), and volcanic porous glass (Sorbix). The photoactivity of the coated supports was tested in a laboratory photoreactor, with Liapor being the most photoactive support with good mechanical stability. The corresponding rate constant for the degradation of a model pollutant, 4-chlorophenol, was 7.8 × 10−5 s−1. Detail characterization of the coated Liapor was obtained by XRF, SEM/EDX, and UV-Vis diffuse reflectance spectroscopy, and surface area measurements. Outdoor experiments were carried out with calcined Liapor and oxalic acid or methylene blue under sunlight on pilot reactors in the Czech Republic and Vietnam. We demonstrated satisfactory photocatalytic activity, long-term stability, and reusability of the new floating photocatalyst. The photoefficiency to mineralize oxalic acid in water under sunlight was estimated as 6.7% under the applied conditions. |
| format | Article |
| id | doaj-art-93f169a2542849e78f2a8ab25f895eb1 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-93f169a2542849e78f2a8ab25f895eb12025-02-03T05:53:30ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/26343982634398SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of WaterHana Bíbová0Lenka Hykrdová1Hiep Hoang2Milan Eliáš3Jaromír Jirkovský4Department of Electrochemical Materials, J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i., 182 23 Prague 8, Czech RepublicDepartment of Electrochemical Materials, J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i., 182 23 Prague 8, Czech RepublicVietnam National University of Agriculture, Gia Lam, Hanoi, VietnamDepartment of Electrochemical Materials, J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i., 182 23 Prague 8, Czech RepublicDepartment of Electrochemical Materials, J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i., 182 23 Prague 8, Czech RepublicIn this study, we describe synthesis and characterization of a floating photocatalyst for water treatment consisting of a light substrate coated by SiO2/TiO2 composite. Three supports of natural origin were used: natural cork, expanded clay (Liapor), and volcanic porous glass (Sorbix). The photoactivity of the coated supports was tested in a laboratory photoreactor, with Liapor being the most photoactive support with good mechanical stability. The corresponding rate constant for the degradation of a model pollutant, 4-chlorophenol, was 7.8 × 10−5 s−1. Detail characterization of the coated Liapor was obtained by XRF, SEM/EDX, and UV-Vis diffuse reflectance spectroscopy, and surface area measurements. Outdoor experiments were carried out with calcined Liapor and oxalic acid or methylene blue under sunlight on pilot reactors in the Czech Republic and Vietnam. We demonstrated satisfactory photocatalytic activity, long-term stability, and reusability of the new floating photocatalyst. The photoefficiency to mineralize oxalic acid in water under sunlight was estimated as 6.7% under the applied conditions.http://dx.doi.org/10.1155/2019/2634398 |
| spellingShingle | Hana Bíbová Lenka Hykrdová Hiep Hoang Milan Eliáš Jaromír Jirkovský SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water Journal of Chemistry |
| title | SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water |
| title_full | SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water |
| title_fullStr | SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water |
| title_full_unstemmed | SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water |
| title_short | SiO2/TiO2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water |
| title_sort | sio2 tio2 composite coating on light substrates for photocatalytic decontamination of water |
| url | http://dx.doi.org/10.1155/2019/2634398 |
| work_keys_str_mv | AT hanabibova sio2tio2compositecoatingonlightsubstratesforphotocatalyticdecontaminationofwater AT lenkahykrdova sio2tio2compositecoatingonlightsubstratesforphotocatalyticdecontaminationofwater AT hiephoang sio2tio2compositecoatingonlightsubstratesforphotocatalyticdecontaminationofwater AT milanelias sio2tio2compositecoatingonlightsubstratesforphotocatalyticdecontaminationofwater AT jaromirjirkovsky sio2tio2compositecoatingonlightsubstratesforphotocatalyticdecontaminationofwater |