A Z‐Scheme Polyimide/AgBr@Ag Aerogel with Excellent Photocatalytic Performance for the Degradation of Oxytetracycline

Abstract

An ovel Z-schemep olyimide (PI)/AgBr@Aga erogel photocatalyst has been successfully synthesized by combining an in situ precipitation method and as upercritical drying method. The as-prepared PI/AgBr@Ag-50 (50 wt % AgBr@Ag in PI/AgBr@Ag) aerogel photocatalyst exhibited excellent photocatalytic activity foro xytetracycline degradation with ar ate constant of 0.025 min À1 ,w hich was 6.9 and 2.6 times higher than that of the PI aerogel or the AgBr@Ag nanoparticles, respectively.M ore significantly,t he PI/ AgBr@Ag-50 aerogel photocatalysts howed stable cycling, which could be attributed to the high mechanical strength and 3D network of the PI aerogel.T he introduction of AgBr@Ag on PI with ah eterojunction structure efficiently promoted the separation of electron-hole pairs by aZschemem echanism. The reduced metallic Ag nanoparticles were found to function as centers for the transfer of electrons from AgBr to PI. This work has revealed an ew application fort he aerogel PI/AgBr@Ag photocatalyst in environmentalp rotection.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Preparation and Properties of the Urea-Formaldehyde Res-In/Reactive Halloysite Nanocomposites Adhesive with Low-Formaldehyde Emission and Good Water Resistance

“…However, melamine, phenol, and other copolymerization modifiers are petrochemical products, which could cause serious environmental pollution and overload the resource burden as they are widely used [ 18 , 19 , 20 ]. The seriously environmental problems are against green and sustainable development [ 21 , 22 , 23 ]. The second problem is that: much flour or starch was used to adjust the initial viscosity and rheological behavior of the resin.…”

“…Owing to its physical and chemical particularity, it has been more and more widely used in various fields [ 45 , 46 ]. For example, the HNTs with curly tubular structure could be used as an efficient adsorbent especially in the adsorption area [ 22 , 47 ]. Zhao studied the effect of temperature, pH, and initial concentration on the adsorption of methylene blue by HNTs.…”

Redox-active polyimides for energy conversion and storage: from synthesis to application

“…Zhao et al reported PI-based aerogels for the degradation of oxytetracycline under visible-light irradiation. 84 A PI/silver bromide (AgBr)@Ag composite aerogel was prepared as a photocatalyst by dispersing AgBr@Ag nanoparticles uniformly on a PI aerogel (Fig. 7(e)).…”

Z-scheme polyimide/tungsten trioxide aerogel photocatalyst for enhanced photocatalytic CO2 reduction under visible light

“…However, the powder samples are difficult to recycle. Recently, our team has been focusing on research into PI aerogel photocatalysts, which possess high specific surface area and abundant pore structure compared with the conventional PI powder photocatalysts [10,11]. Apart from that, the adsorption capacity of CO 2 over a photocatalyst will influence the CO 2 reduction activity greatly.…”

“…More importantly, the CB energy of PI aerogel is 1.3∼1.7 eV (versus normal hydrogen electrode (NHE)), which is favorable for CO 2 reduction because of the higher reduction activity of photo-generated electrons [10,11]. However, on the one hand, the VB position of PI aerogel cannot stretch across the reaction potential of H 2 O oxidation and so cannot accelerate the reduction of CO 2 (CO 2 -COOH * -CO) [15].…”