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Ti3C2Tx MXene decorated black phosphorus nanosheets with improved visible-light photocatalytic activity: experimental and theoretical studies.
- Source :
- Journal of Materials Chemistry A; 3/14/2020, Vol. 8 Issue 10, p5171-5185, 15p
- Publication Year :
- 2020
-
Abstract
- Metal-free black phosphorus (BP) nanosheets have emerged as a promising photocatalyst. Herein, early transition-metal carbide and nitride (MXene) decorated BP (Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>/TiO<subscript>2</subscript>–BP) nanohybrids were constructed by a hydrothermal method, in which TiO<subscript>2</subscript> was produced in the hydrothermal process. The optimized Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>/TiO<subscript>2</subscript>–BP nanohybrids exhibited a higher visible-light photodegradation efficiency of rhodamine B (99.09%) and tetracycline hydrochloride (92.70%) pollutants than that of pristine BP (12.75% and 9.35%, respectively). Diverse characterization techniques and density functional theory calculations have revealed that such enhanced photocatalytic performance was due to the synergistic effect of BP and Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>/TiO<subscript>2</subscript>, which could markedly improve the stability of BP, increase visible light absorption, prolong the photoexcited electron lifetime, accelerate the photoinduced electron transfer and hinder the electron–hole (e<superscript>−</superscript>–h<superscript>+</superscript>) pair recombination. Meanwhile, the mechanism analysis indicated that ˙O<subscript>2</subscript><superscript>−</superscript> radicals played a leading role in the photocatalytic process. This study will motivate great interest in using 2D MXenes as co-catalysts to enhance the activity of BP for its applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 8
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 142160929
- Full Text :
- https://doi.org/10.1039/c9ta13610j