LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays
Photoelectric catalysis is a green and efficient way to degrade pollutants, which has been paid more and more attention by researchers. Among them, Bi<sub>2</sub>WO<sub>3</sub> has been proved to have excellent photocatalytic oxidation activity on its {001} facets. In this st...
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MDPI AG
2024-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/5/477 |
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| author | Yuting Wang Runhua Li Jiaying Zhang Liming Liu Weiwei Huang Yajun Wang |
| author_facet | Yuting Wang Runhua Li Jiaying Zhang Liming Liu Weiwei Huang Yajun Wang |
| author_sort | Yuting Wang |
| collection | DOAJ |
| description | Photoelectric catalysis is a green and efficient way to degrade pollutants, which has been paid more and more attention by researchers. Among them, Bi<sub>2</sub>WO<sub>3</sub> has been proved to have excellent photocatalytic oxidation activity on its {001} facets. In this study, {001}-oriented facets with high exposure were successfully integrated into Bi<sub>2</sub>WO<sub>6</sub> nanoplate arrays (Bi<sub>2</sub>WO<sub>6</sub> NAs) to create a photoelectrode. This structure was grown in situ on an indium tin oxide (ITO) substrate. To promote photogenerated carrier separation efficiency and reduce agglomeration of Bi<sub>2</sub>WO<sub>6</sub> photocatalysts, the electrochemical deposition of NiFe–layered double hydroxide (NiFe-LDH) and Ti<sub>3</sub>C<sub>2</sub> (MXene) were introduced in this research to synergistically catalyze pollutant degradation. Morphology, spectral characterization, and electrochemical analysis jointly confirmed that the outstanding performance of hole capture behavior with LDH and electron conduction properties with MXene were the main reasons for the improvement in catalytic activity of the photoelectrode. Taking bisphenol A (BPA) as the model pollutant, the rate constant <i>k</i> of the NiFe-LDH/Ti<sub>3</sub>C<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> NAs photoelectrode reaches 0.00196 min<sup>−1</sup> under photoelectrocatalytic (PEC) conditions, which is 4.5 times that of the pure Bi<sub>2</sub>WO<sub>6</sub> NAs photoelectrode. This work provides a new way to improve the reaction kinetics of the PEC degradation of pollutants. |
| first_indexed | 2024-04-25T00:23:52Z |
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| last_indexed | 2024-04-25T00:23:52Z |
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| spelling | doaj.art-e873ec236db24b58b54fa06cbf9474412024-03-12T16:51:44ZengMDPI AGNanomaterials2079-49912024-03-0114547710.3390/nano14050477LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet ArraysYuting Wang0Runhua Li1Jiaying Zhang2Liming Liu3Weiwei Huang4Yajun Wang5State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, ChinaPhotoelectric catalysis is a green and efficient way to degrade pollutants, which has been paid more and more attention by researchers. Among them, Bi<sub>2</sub>WO<sub>3</sub> has been proved to have excellent photocatalytic oxidation activity on its {001} facets. In this study, {001}-oriented facets with high exposure were successfully integrated into Bi<sub>2</sub>WO<sub>6</sub> nanoplate arrays (Bi<sub>2</sub>WO<sub>6</sub> NAs) to create a photoelectrode. This structure was grown in situ on an indium tin oxide (ITO) substrate. To promote photogenerated carrier separation efficiency and reduce agglomeration of Bi<sub>2</sub>WO<sub>6</sub> photocatalysts, the electrochemical deposition of NiFe–layered double hydroxide (NiFe-LDH) and Ti<sub>3</sub>C<sub>2</sub> (MXene) were introduced in this research to synergistically catalyze pollutant degradation. Morphology, spectral characterization, and electrochemical analysis jointly confirmed that the outstanding performance of hole capture behavior with LDH and electron conduction properties with MXene were the main reasons for the improvement in catalytic activity of the photoelectrode. Taking bisphenol A (BPA) as the model pollutant, the rate constant <i>k</i> of the NiFe-LDH/Ti<sub>3</sub>C<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> NAs photoelectrode reaches 0.00196 min<sup>−1</sup> under photoelectrocatalytic (PEC) conditions, which is 4.5 times that of the pure Bi<sub>2</sub>WO<sub>6</sub> NAs photoelectrode. This work provides a new way to improve the reaction kinetics of the PEC degradation of pollutants.https://www.mdpi.com/2079-4991/14/5/477Bi<sub>2</sub>WO<sub>6</sub>MXeneNiFe-LDHphotoelectrocatalyticbisphenol A |
| spellingShingle | Yuting Wang Runhua Li Jiaying Zhang Liming Liu Weiwei Huang Yajun Wang LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays Nanomaterials Bi<sub>2</sub>WO<sub>6</sub> MXene NiFe-LDH photoelectrocatalytic bisphenol A |
| title | LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays |
| title_full | LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays |
| title_fullStr | LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays |
| title_full_unstemmed | LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays |
| title_short | LDH/MXene Synergistic Carrier Separation Effects to Improve the Photoelectric Catalytic Activities of Bi<sub>2</sub>WO<sub>6</sub> Nanosheet Arrays |
| title_sort | ldh mxene synergistic carrier separation effects to improve the photoelectric catalytic activities of bi sub 2 sub wo sub 6 sub nanosheet arrays |
| topic | Bi<sub>2</sub>WO<sub>6</sub> MXene NiFe-LDH photoelectrocatalytic bisphenol A |
| url | https://www.mdpi.com/2079-4991/14/5/477 |
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