Issue 39, 2022, Issue in Progress

Novel ultralong and photoactive Bi2Ti4O11/TiO2 heterojunction nanofibers toward efficient textile wastewater treatment

Abstract

The elimination of dyes from textile wastewater with a lower carbon footprint is highly contingent on the design of green catalysts. Here, we innovatively developed ultralong one-dimensional Bi2Ti4O11/TiO2 heterojunction nanofibers via electrospinning so as to photocatalytically degrade dyes efficiently and sustainably through the utilisation of renewable solar irradiation. The heterostructured Bi2Ti4O11/TiO2 nanofibers exhibited desirable activity in the visible light region through the slight shift of the absorption edge to a longer wavelength. The Bi2Ti4O11/TiO2 nanofibers calcined at 550 °C had a lower optical band gap (3.08 eV) than that of the pure TiO2 (3.32 eV), as evidenced by their higher photocatalytic degradation kinetics of a model dye (Acid Orange 7) (2.5 times greater than those of pure TiO2). The enhanced visible light photocatalytic performance arose from the formation of both the Bi2Ti4O11/TiO2 heterojunction and the effective separation of photogenerated holes and electrons. The employment of ultralong Bi2Ti4O11/TiO2 heterojunction nanofibers for dye removal/decolourisation under visible light is an efficient, cost effective and sustainable solution, which will provide significant insights for practical textile wastewater treatment in view of practical engineering applications.

Graphical abstract: Novel ultralong and photoactive Bi2Ti4O11/TiO2 heterojunction nanofibers toward efficient textile wastewater treatment

Article information

Article type
Paper
Submitted
04 Apr 2022
Accepted
23 Aug 2022
First published
07 Sep 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 25449-25456

Novel ultralong and photoactive Bi2Ti4O11/TiO2 heterojunction nanofibers toward efficient textile wastewater treatment

J. Juay, J. E. Yang, H. Bai and D. D. Sun, RSC Adv., 2022, 12, 25449 DOI: 10.1039/D2RA02181A

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