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

Abstract

The 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.

Hyper oxygen incorporation in CeF3: a new intermediate-band photocatalyst for antibiotic degradation under visible/NIR light

“…BQ, EDTA 2Na and IP are used to scavenge cO 2 À , h+ and cOH species, respectively. [39][40][41] The addition of IP scavenges cOH and has little effect on the TC-HCl degradation. (Fig.…”

Facile synthesis of a novel WO3/Ag2MoO4 particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants

“…On the other hand, the staggered bandgap and intimate contact between Ag 2 MoO 4 and WO 3 greatly promote the charge separation and transfer in the Ag-W heterojunction. [52][53][54][55][56][57][58][59] Under visible light irradiation, both Ag 2 MoO 4 and WO 3 can be excited to photogenerated electronhole pairs. Since the potentials for CB and VB of Ag 2 MoO 4 are more negative than that of Ag 2 MoO 4 , photogenerated electrons in the CB of Ag 2 MoO 4 can be transferred to that of WO 3 while holes in the VB of WO 3 can be transferred to that of Ag 2 MoO 4 .…”

Zn Cd1–S quantum dot with enhanced photocatalytic H2-production performance

“…However, CdS suffers from severe photocorrosion, low separation, and low transfer efficiency of photogenerated carriers [22], which limit its extensive practical applications. To enhance the photocatalytic H2-production performance of the CdS photocatalyst, several strategies have been investigated, such as surface modification [23], heterojunction construction [24][25][26][27][28][29][30], and cocatalyst addition [21,[31][32][33][34][35]. However, the current photocatalytic H2-production performance of CdS is still unsatisfactory.…”