CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub>/NiCr-LDH Multi-Interface Heterostructure Photocatalyst for Enhanced Photocatalytic H<sub>2</sub> Evolution and Cr(VI) Reduction
The development of highly active and stable photocatalysts, an effective way to remediate environment pollution and alleviate energy shortages, remains a challenging issue. In this work, a CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub> nanocomposite was deposite...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/d644512858b340e1a773f0bb40f1b063 |
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| Sumario: | The development of highly active and stable photocatalysts, an effective way to remediate environment pollution and alleviate energy shortages, remains a challenging issue. In this work, a CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub> nanocomposite was deposited in-situ on NiCr-LDH nanosheets by a simple hydrothermal method, and the obtained CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub>/NiCr-LDH heterostructure photocatalysts with multiple intimate-contact interfaces exhibited better photocatalytic activity. The photocatalytic H<sub>2</sub> evolution rate of CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub>/NiCr-LDH increased to 10.9 and 58.7 times that of the counterparts CdIn<sub>2</sub>S<sub>4</sub> and NiCr-LDH, respectively. Moreover, the photocatalytic removal efficiency of Cr(VI) increased from 6% for NiCr-LDH and 75% for CdIn<sub>2</sub>S<sub>4</sub> to 97% for CdIn<sub>2</sub>S<sub>4</sub>/In(OH)<sub>3</sub>/NiCr-LDH. The enhanced photocatalytic performance was attributed to the formation of multi-interfaces with strong interfacial interactions and staggered band alignments, which offered multiple pathways for carrier migration, thus promoting the separation efficiency of photo-excited electrons and holes. This study demonstrates a facile method to fabricate inexpensive and efficient heterostructure photocatalysts for solving environmental problems. |
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