Functionalized MoO₃ Nanosheets for High‐Efficiency RhB Removal

Abstract

2D nanostructured materials have been applied for water purification in the past decades due to their excellent separation and adsorption performance. However, the functional 2D nanostructured molybdenum trioxide (MoO3)has rarely been reported for the removal of dyes. Here, functionalized MoO3 (F‐MoO3) nanosheets are successfully fabricated with a high specific surface area (106 cc g−1) by a one‐step mechanochemical exfoliation method as a highly effective adsorbent for removing dyes from water. According to the Raman, X‐ray photoelectron spectroscopy, Fourier transform infrared (FTIR), and selected area electron diffraction analysis, functional groups (hdroxyl groups, amide groups, amine groups and amino groups) are identified in the as‐prepared F‐MoO3 nanosheets. The attached functional groups not only facilitate the dispersal ability of F‐MoO3 nanosheets but also enhance the adsorption capacities. Thus, the performance (up to 556 mg g−1 when the initial concentration of Rhodamine B solution is 100 mg L−1) of as‐prepared F‐MoO3 nanosheets is almost two times higher than other reported MoO3 materials. Furthermore, the FTIR spectra, isotherm, and several factors (e.g., adsorbent dosage and adsorbate dosage) are also systematically investigated to explore the adsorption mechanism. Therefore, this work demonstrates that the F‐MoO3 nanosheets are a promising candidate for wastewater treatment.

Solvent‐Induced Deformation of Aramid Nanofibers for Ultrahigh‐Flux Nanofiltration Membranes

“…[1] Compared with other approaches for generating clean water, nanofiltration is considered one of DOI: 10.1002/adfm.202309722 the most promising techniques in wastewater treatment due to the high performance, low cost, and energy efficiency of the separation process. [2,3] Currently, polyamidebased nanofiltration membranes with a nominal molecular weight cutoff (MWCO) from 200 to 1000 Da were widely investigated and parts were commercially available (Table S1, Supporting Information). [4][5][6][7][8][9][10] However, the trade-off between permeability and selectivity was still the main limitation for further implementations of polymeric nanofiltration membranes.…”