Batch Preparation of CuO/ZnO-Loaded Nanofiber Membranes for Photocatalytic Degradation of Organic Dyes

Abstract

Composite nanofiber membranes (CNFMs) loaded with CuO/ZnO (CZCNFMs) have important applications in a series of organic and industrial catalytic reactions because of nanoeffects of the nanofibers and the peculiar performances of semiconductor oxides. In this work, CZCNFMs with different mass ratios of Cu to Zn were successfully fabricated in batches using modified bubble electrospinning (MBE), a heat treatment method, and a hydrothermal method. The influences of the mass ratio of Cu to Zn on the morphologies, structures, and properties of the CNFMs were studied, and the obtained CNFMs with different mass ratios of Cu to Zn were applied to the photodegradation of methyl orange (MO) and methylene blue (MB). The results showed that when the mass ratio of Cu to Zn was 5:5, the fabricated CNFM had better morphology, structure, and mechanical properties and had the best degradation effects on MO and MB. In addition, the principal active substances produced during the photodegradation of MO were defined by free radical capture experiments, and the influences of the pH value of the MO solution on the photocatalytic activity of the CNFMs with the optimal mass ratio of 5:5 were discussed.

Application of ZnO Semiconductor Nanomaterial Ink in Packaging and Printing Design

“…Xu et al proposed the effects of Zn2+ concentration, calcination temperature, and other conditions on the particle size of ZnO nanocrystals during the preparation process and analyzed the mechanism. Experimental results show that the smaller the reaction concentration, the smaller the crystal grain size can be obtained; under the same other reaction conditions, the grain size of the prepared nano-ZnO particles increases gradually with the increase of the calcination temperature [6]. Das et al proposed metal-organic chemical vapor deposition.…”

The Contribution of the Spatial Restriction for Improvement of Hydrogenation and Water‐tolerant for Cu/SiO2 Catalysts by Varied Pores of Support

“…[7] Furthermore, the weak and broad diffraction peak at 2θ = 22°is assigned to SiO 2 (PDF#29-0085) [7][8] and the diffraction peak, which locates at 38.5°, is assigned to CuO (PDF#44-0706). [7,9] Other diffraction peaks are corresponding to chrysocolla (PDF#27-0188). [3,10] Fourier transform infrared spectra were recorded for the prepared catalysts (Figure 2).…”

BiOX (X = Cl, Br, I)/WO3/Polyacrylonitrile Nanofibrous Membranes for Diagnostic X-Ray Shielding and Visible-Light Photocatalysis

“…In this work, we developed such an idea to construct the BiOX (X = Cl, Br, I)/WO 3 heterojunction on the surface of flexible polymeric nanofibers through a simple solvothermal and successive ionic layer adsorption and reaction (SILAR) process, as reported in the literature. − BiOX successfully transferred the spectral utilization range of the heterojunction to the visible region, and the SILAR process simplified the preparation conditions of materials and ensures high- Z element loadings. The as-prepared BiOX (X = Cl, Br, I)/WO 3 /PAN nanofibrous membranes could serve as excellent lightweight fillers in X-ray shielding protective garments, and they could be easily recycled and utilized as visible-light catalysts for the treatment of cationic organic pollutants in wastewater after their service life. We believe that the medical X-ray protection materials prepared by this strategy can provide new ideas for the use and development of rare materials like high- Z elements.…”