Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst
The binary type-II heterojunction photocatalyst containing g-C<sub>3</sub>N<sub>4</sub> and polyoxoniobate (PONb, K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>) with excellent H<sub>2</sub> production activity was synthesized by de...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/5/849 |
| _version_ | 1797474227853459456 |
|---|---|
| author | Qi Song Shiliang Heng Wenbin Wang Huili Guo Haiyan Li Dongbin Dang |
| author_facet | Qi Song Shiliang Heng Wenbin Wang Huili Guo Haiyan Li Dongbin Dang |
| author_sort | Qi Song |
| collection | DOAJ |
| description | The binary type-II heterojunction photocatalyst containing g-C<sub>3</sub>N<sub>4</sub> and polyoxoniobate (PONb, K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>) with excellent H<sub>2</sub> production activity was synthesized by decorating via a facile hydrothermal method for the first time. The as-fabricated Nb–CN-0.4 composite displayed a maximum hydrogen evolution rate of 359.89 µmol g<sup>−1</sup> h<sup>−1</sup> without a co-catalyst under the irradiation of a 300 W Xenon Lamp, which is the highest among those of the binary PONb-based photocatalytic materials reported. The photophysical and photochemistry analyses indicated that the hydrogen evolution performance could be attributed to the formation of a type-II heterojunction, which could not only accelerate the transfer of photoinduced interfacial charges, but also effectively inhibit the recombination of electrons and holes. This work could provide a useful reference to develop an inexpensive and efficient photocatalytic system based on PONb towards H<sub>2</sub> production. |
| first_indexed | 2024-03-09T20:28:07Z |
| format | Article |
| id | doaj.art-530d2fda9c46439da64077e9cd4819cc |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T20:28:07Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-530d2fda9c46439da64077e9cd4819cc2023-11-23T23:31:07ZengMDPI AGNanomaterials2079-49912022-03-0112584910.3390/nano12050849Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-CatalystQi Song0Shiliang Heng1Wenbin Wang2Huili Guo3Haiyan Li4Dongbin Dang5Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaThe binary type-II heterojunction photocatalyst containing g-C<sub>3</sub>N<sub>4</sub> and polyoxoniobate (PONb, K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>) with excellent H<sub>2</sub> production activity was synthesized by decorating via a facile hydrothermal method for the first time. The as-fabricated Nb–CN-0.4 composite displayed a maximum hydrogen evolution rate of 359.89 µmol g<sup>−1</sup> h<sup>−1</sup> without a co-catalyst under the irradiation of a 300 W Xenon Lamp, which is the highest among those of the binary PONb-based photocatalytic materials reported. The photophysical and photochemistry analyses indicated that the hydrogen evolution performance could be attributed to the formation of a type-II heterojunction, which could not only accelerate the transfer of photoinduced interfacial charges, but also effectively inhibit the recombination of electrons and holes. This work could provide a useful reference to develop an inexpensive and efficient photocatalytic system based on PONb towards H<sub>2</sub> production.https://www.mdpi.com/2079-4991/12/5/849PONb-based photocatalystg-C<sub>3</sub>N<sub>4</sub>type-II heterojunctionphotocatalytic hydrogen evolution |
| spellingShingle | Qi Song Shiliang Heng Wenbin Wang Huili Guo Haiyan Li Dongbin Dang Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst Nanomaterials PONb-based photocatalyst g-C<sub>3</sub>N<sub>4</sub> type-II heterojunction photocatalytic hydrogen evolution |
| title | Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst |
| title_full | Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst |
| title_fullStr | Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst |
| title_full_unstemmed | Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst |
| title_short | Binary Type-II Heterojunction K<sub>7</sub>HNb<sub>6</sub>O<sub>19</sub>/g-C<sub>3</sub>N<sub>4</sub>: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst |
| title_sort | binary type ii heterojunction k sub 7 sub hnb sub 6 sub o sub 19 sub g c sub 3 sub n sub 4 sub an effective photocatalyst for hydrogen evolution without a co catalyst |
| topic | PONb-based photocatalyst g-C<sub>3</sub>N<sub>4</sub> type-II heterojunction photocatalytic hydrogen evolution |
| url | https://www.mdpi.com/2079-4991/12/5/849 |
| work_keys_str_mv | AT qisong binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst AT shiliangheng binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst AT wenbinwang binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst AT huiliguo binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst AT haiyanli binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst AT dongbindang binarytypeiiheterojunctionksub7subhnbsub6subosub19subgcsub3subnsub4subaneffectivephotocatalystforhydrogenevolutionwithoutacocatalyst |