Agave-Angustifolia-like Cu₃Mo₂O₉ Nanoplate-Coated Copper Mesh for Effective Emulsion Separation and Photocatalytic Degradation of Soluble Dyes

Abstract

Significant progress has been made in the development of membranes characterized by high permeation flux, special wettability, selectivity, and stability during oily wastewater separation. However, more research is needed in multitasking membranes. Herein, we introduce a facile strategy of fabricating a superhydrophilic and underwater superoleophobic agave-angustifolia-like Cu 3 Mo 2 O 9 nanoplate-coated copper mesh membrane via subsequent chemical oxidation, hydrothermal deposition, and calcination methods. The synergistic effect of the hierarchical structure and photocatalytic activity of the Cu 3 Mo 2 O 9 coating endowed the as-fabricated membrane with superwettability and self-cleaning ability, resulting in high permeation flux (up to 3503.18 L•m −2 •h −1 for surfactant-free emulsions and 917.20 L•m −2 • h −1 for surfactant-stabilized emulsions) and low oil residues in the filtrate (COD value of 11.4 mg L −1 for surfactant-free emulsions and 86.8 mg L −1 for surfactant-stabilized emulsions) during oil-in-water emulsion separation, as well as photocatalytic dye degradation capabilities for methylene blue (92.4%) and rhodamine B (68.6%). Furthermore, the as-fabricated membrane exhibited favorable chemical stability and abrasive resistance. The strategy presented in this work provided a method to produce a durable membrane for efficient oil−water separation with photocatalytic properties and can withstand harsh environments.

In situ construction of Ohmic/Schottky-type MoS2/Sv-ZnIn2S4/Cu(OH)2 dual-junction photocatalysts with enhanced water splitting into hydrogen generation activity

“…2E), indicating the +6 valence state in CMO. 40 In comparison with CMO, CMO-0.6/ZIS samples exhibit obvious downshis to lower binding energies at 232.60 and 229.03 eV, which can be attributed to Mo 4+ 3d 3/2 and Mo 4+ 3d 5/2 orbitals in MS. 41 That is, CMO as a structure-tailored body is thoroughly decomposed during the water-bath process and the formation of MS can be identied once more. Meanwhile, the highresolution XPS spectra of Zn 2p, In 3d and S 2p explicate the valence states of Zn 2+ , In 3+ and S 2− (ESI, Fig.…”