Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution
A magnetically recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> photocatalyst with significantly enhanced H2 evolution efficiency was successfully synthesized by a simple ethanol-solvothermal treatment. The presence of electronegative g-C<sub>3</sub>N<sub>4<...
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MDPI AG
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| author | Tingfeng Zhang Ping Liu Lili Wang Shuai Wang Jinsheng Shi Xuefang Lan |
| author_facet | Tingfeng Zhang Ping Liu Lili Wang Shuai Wang Jinsheng Shi Xuefang Lan |
| author_sort | Tingfeng Zhang |
| collection | DOAJ |
| description | A magnetically recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> photocatalyst with significantly enhanced H2 evolution efficiency was successfully synthesized by a simple ethanol-solvothermal treatment. The presence of electronegative g-C<sub>3</sub>N<sub>4</sub> is found to be the key factor for Ni<sup>0</sup> formation in ternary Ni/NiO/g-C<sub>3</sub>N<sub>4</sub>, which provides anchoring sites for Ni<sup>2+</sup> absorption and assembling sites for Ni<sup>0</sup> nanoparticle formation. The metallic Ni<sup>0</sup>, on one side, could act as an electron acceptor enhancing carrier separation and transfer efficiency, and on the other side, it could act as active sites for H<sub>2</sub> evolution. The NiO forms a p–n heterojunction with g-C<sub>3</sub>N<sub>4</sub>, which also promotes carrier separation and transfer efficiency. The strong magnetic property of Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> allows a good recyclability of catalyst from aqueous solution. The optimal Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> showed a full-spectrum efficiency of 2310 μmol·h<sup>−1</sup>·g<sup>−1</sup> for hydrogen evolution, which is 210 times higher than that of pure g-C<sub>3</sub>N<sub>4</sub>. This ethanol solvothermal strategy provides a facile and low-cost synthesis of metal/metal oxide/g-C<sub>3</sub>N<sub>4</sub> for large-scale application. |
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| language | English |
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| publishDate | 2021-05-01 |
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| series | Materials |
| spelling | doaj.art-6afdfb38c8654d9bbe3602ac48e427132023-11-21T21:46:39ZengMDPI AGMaterials1996-19442021-05-011411289410.3390/ma14112894Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> EvolutionTingfeng Zhang0Ping Liu1Lili Wang2Shuai Wang3Jinsheng Shi4Xuefang Lan5Department of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266000, ChinaDepartment of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266000, ChinaDepartment of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266000, ChinaChengyang Branch of Qingdao Ecological Environment Bureau, Qingdao 266000, ChinaDepartment of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266000, ChinaDepartment of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266000, ChinaA magnetically recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> photocatalyst with significantly enhanced H2 evolution efficiency was successfully synthesized by a simple ethanol-solvothermal treatment. The presence of electronegative g-C<sub>3</sub>N<sub>4</sub> is found to be the key factor for Ni<sup>0</sup> formation in ternary Ni/NiO/g-C<sub>3</sub>N<sub>4</sub>, which provides anchoring sites for Ni<sup>2+</sup> absorption and assembling sites for Ni<sup>0</sup> nanoparticle formation. The metallic Ni<sup>0</sup>, on one side, could act as an electron acceptor enhancing carrier separation and transfer efficiency, and on the other side, it could act as active sites for H<sub>2</sub> evolution. The NiO forms a p–n heterojunction with g-C<sub>3</sub>N<sub>4</sub>, which also promotes carrier separation and transfer efficiency. The strong magnetic property of Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> allows a good recyclability of catalyst from aqueous solution. The optimal Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> showed a full-spectrum efficiency of 2310 μmol·h<sup>−1</sup>·g<sup>−1</sup> for hydrogen evolution, which is 210 times higher than that of pure g-C<sub>3</sub>N<sub>4</sub>. This ethanol solvothermal strategy provides a facile and low-cost synthesis of metal/metal oxide/g-C<sub>3</sub>N<sub>4</sub> for large-scale application.https://www.mdpi.com/1996-1944/14/11/2894Ni/NiO/g-C<sub>3</sub>N<sub>4</sub>magnetically recoverableethanol-solvothermalenvironmental-friendly synthesis |
| spellingShingle | Tingfeng Zhang Ping Liu Lili Wang Shuai Wang Jinsheng Shi Xuefang Lan Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution Materials Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> magnetically recoverable ethanol-solvothermal environmental-friendly synthesis |
| title | Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution |
| title_full | Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution |
| title_fullStr | Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution |
| title_full_unstemmed | Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution |
| title_short | Electronegativity Assisted Synthesis of Magnetically Recyclable Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> for Significant Boosting H<sub>2</sub> Evolution |
| title_sort | electronegativity assisted synthesis of magnetically recyclable ni nio g c sub 3 sub n sub 4 sub for significant boosting h sub 2 sub evolution |
| topic | Ni/NiO/g-C<sub>3</sub>N<sub>4</sub> magnetically recoverable ethanol-solvothermal environmental-friendly synthesis |
| url | https://www.mdpi.com/1996-1944/14/11/2894 |
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