TiO2/MoS2 heterojunctions-decorated carbon fibers with broad-spectrum response as weaveable photocatalyst/photoelectrode. (April 2019)

• Record Type: Journal Article
• Authors: Shi, Zhun; Xu, Pengfei; Shen, Xiaofeng; Zhang, Yan; Luo, Li; Duoerkun, Gumila; Zhang, Lisha
• Is Part Of: Materials research bulletin. Volume 112(2019)
• Page Start: 354
• Page End: 362
• Publication Date: 2019-04
• Subjects: TiO2/MoS2 -- Carbon fibers -- Visible-light -- Photocatalyst -- Photoelectrocatalysis; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2019.01.005
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Carbon fibers (CFs) have been decorated with TiO2 /MoS2 heterojunctions, and CFs/TiO2 /MoS2 exhibits broad-spectrum response and can be used as weaveable efficient photocatalyst/photoelectrode for degrading various pollutants in water. Highlights: The growth of TiO2 /MoS2 heterojunctions on carbon fibers (CFs) has been realized. CFs/TiO2 /MoS2 exhibits a strong absorption spectrum in a wide range from 200 to 1500 nm. CFs/TiO2 /MoS2 can be used as weaveable efficient photocatalyst/photoelectrode. The dominant active species are O2 − and h + . CFs/TiO2 /MoS2 can be easily recycled and remains good stability. Abstract: The development of efficient and recyclable photocatalysts with wide spectrum response has drawn much attention. Herein, we prepared TiO2 /MoS2 heterostructures on carbon fibers (CFs) by a two-step hydrothermal method. CFs/TiO2 /MoS2 exhibits a strong and wide absorption spectrum from ultraviolet to near-infrared region (>1200 nm). Under the irradiation of visible-light, CFs/TiO2 /MoS2 could degrade 97.6% Rhodamine B (RhB) after 100 min, 94.2% Acid Orange 7 (AO7) or 93.4% tetracycline hydrochloride (TC) after 60 min, and 88.7% 4-chlorophenol (4-CP) after 180 min. Moreover, CFs/TiO2 /MoS2 bundles can be further weaved into a cloth (area: 4 × 4 cm 2 ). CFs/TiO2 /MoS2 cloth as a working electrode exhibits significant photocurrent (7.53 × 10 −6 A/cm 2 ) and enhanced photoelectrocatalytic efficiency (100% TC) comparing with only photocatalysis (90.7% TC) or electrocatalysis (47% TC). In particular, CFs/TiO2 /MoS2 cloth shows excellent stability. Therefore, CFs/TiO2 /MoS2 cloth has great potential to be used as flexible and weaveable photocatalyst/photoelectrode for degrading various pollutants.