Synthesis of MoS2/CdS Heterostructures on Carbon‐Fiber Cloth as Filter‐Membrane‐Shaped Photocatalyst for Purifying the Flowing Wastewater under Visible‐Light Illumination

Abstract

AbstractThe development of effective, visible‐light‐drivable and reusable photocatalysts has drawn great attention for purifying the flowing wastewater. Herein, we have designed and prepared MoS2/CdS heterostructures on carbon fiber (CF) cloth as a novel filter‐membrane‐shaped photocatalyst. With CF cloth as the substrate, the growth of MoS2 nanosheets (thickness: ∼20 nm) and CdS nanoparticles (∼5 nm) have been achieved by using a hydrothermal‐chemical bath deposition two‐step route. CF/MoS2/CdS cloth shows a strong and wide photoabsorption accompanied by a small peak with an edge around 700 nm. Under visible‐light irradiation, CF/MoS2/CdS cloth (area: 4×4 cm2) can expeditiously remove 97.3 % rhodamine B, 55.6 % tetracycline hydrochloride and 68.4 % hexavalent chromium after 100 min, and 97.3 % methylene blue after 70 min. In particular, when CF/MoS2/CdS cloth (diameter: ∼10 cm) is used as a filter‐membrane to photocatalytically degrade the flowing wastewater (10 mg L−1 RhB, rate: ∼1 L h−1), 92.6 % RhB can be eliminated in eight grading pools. Therefore, CF/MoS2/CdS cloth has the capacity to be a recyclable photocatalyst with high efficiency for purifying the flowing wastewater.