Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation
Photocatalytic technology, with features of wide applicability, mild reaction conditions and sunlight availability, satisfies the requirements of “green chemistry”. As the star photoanode material for photoelectrochemical catalysis, WO<sub>3</sub> has a suitable band gap of 2.8 eV and a...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/13/3/526 |
| _version_ | 1797623644308897792 |
|---|---|
| author | Jiakun Zhang Weixu Sun Xin Ding Kai Xia Tao Liu Xiaodong Zhang |
| author_facet | Jiakun Zhang Weixu Sun Xin Ding Kai Xia Tao Liu Xiaodong Zhang |
| author_sort | Jiakun Zhang |
| collection | DOAJ |
| description | Photocatalytic technology, with features of wide applicability, mild reaction conditions and sunlight availability, satisfies the requirements of “green chemistry”. As the star photoanode material for photoelectrochemical catalysis, WO<sub>3</sub> has a suitable band gap of 2.8 eV and a strong oxidation capacity, as well as displaying great potential in organic wastewater degradation. However, its performance is usually hindered by competition with water oxidation to generate peroxides, rapid charge complexation caused by surface defect sites, and so on. Herein, WO<sub>3</sub> films modified with cobalt–phosphate (Co-Pi/WO<sub>3</sub>) film were prepared and involved in photocatalytic organic wastewater degradation. A degradation rate constant of 0.63311 h<sup>−1</sup> was obtained for Co-Pi/WO<sub>3</sub>, which was much higher than that of WO<sub>3</sub>, 10.23 times that of direct photocatalysis (DP) and 23.99 times that of electrocatalysis (EC). After three cycles of degradation, the film can maintain a relatively good level of stability and a degradation efficiency of 93.79%. |
| first_indexed | 2024-03-11T09:31:49Z |
| format | Article |
| id | doaj.art-dd877c1403ee4afcb6ca355c11744e03 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:31:49Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-dd877c1403ee4afcb6ca355c11744e032023-11-16T17:36:01ZengMDPI AGNanomaterials2079-49912023-01-0113352610.3390/nano13030526Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater DegradationJiakun Zhang0Weixu Sun1Xin Ding2Kai Xia3Tao Liu4Xiaodong Zhang5College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, ChinaPhotocatalytic technology, with features of wide applicability, mild reaction conditions and sunlight availability, satisfies the requirements of “green chemistry”. As the star photoanode material for photoelectrochemical catalysis, WO<sub>3</sub> has a suitable band gap of 2.8 eV and a strong oxidation capacity, as well as displaying great potential in organic wastewater degradation. However, its performance is usually hindered by competition with water oxidation to generate peroxides, rapid charge complexation caused by surface defect sites, and so on. Herein, WO<sub>3</sub> films modified with cobalt–phosphate (Co-Pi/WO<sub>3</sub>) film were prepared and involved in photocatalytic organic wastewater degradation. A degradation rate constant of 0.63311 h<sup>−1</sup> was obtained for Co-Pi/WO<sub>3</sub>, which was much higher than that of WO<sub>3</sub>, 10.23 times that of direct photocatalysis (DP) and 23.99 times that of electrocatalysis (EC). After three cycles of degradation, the film can maintain a relatively good level of stability and a degradation efficiency of 93.79%.https://www.mdpi.com/2079-4991/13/3/526photoelectric catalysisphotodegradationhydrogen productionwastewater |
| spellingShingle | Jiakun Zhang Weixu Sun Xin Ding Kai Xia Tao Liu Xiaodong Zhang Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation Nanomaterials photoelectric catalysis photodegradation hydrogen production wastewater |
| title | Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation |
| title_full | Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation |
| title_fullStr | Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation |
| title_full_unstemmed | Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation |
| title_short | Cobalt-Phosphate (Co-Pi)-Modified WO<sub>3</sub> Photoanodes for Performance-Enhanced Photoelectrochemical Wastewater Degradation |
| title_sort | cobalt phosphate co pi modified wo sub 3 sub photoanodes for performance enhanced photoelectrochemical wastewater degradation |
| topic | photoelectric catalysis photodegradation hydrogen production wastewater |
| url | https://www.mdpi.com/2079-4991/13/3/526 |
| work_keys_str_mv | AT jiakunzhang cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation AT weixusun cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation AT xinding cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation AT kaixia cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation AT taoliu cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation AT xiaodongzhang cobaltphosphatecopimodifiedwosub3subphotoanodesforperformanceenhancedphotoelectrochemicalwastewaterdegradation |