Significantly improving the Cu2+ removal performance of conducting polymer‐based adsorbent from aqueous solution through cross‐linking modification. Issue 3 (5th October 2022)

• Record Type: Journal Article
• Authors: Mamat, Kamila; Muslim, Arzugul; Lan, Haidie; Malik, Dilnur; Musajan, Aynur
• Is Part Of: Journal of applied polymer science. Volume 140:Issue 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-05
• Subjects: applications -- adsorption -- conducting polymers; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.53176
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: Through cross‐linking modification of poly( o ‐phenylenediamine) (P o PD) to increase the adsorption active sites, the Cu 2+ adsorption capacity of P o PD was improved significantly. According to FT‐IR, XRD, SEM and BET results, both P o PD and the cross‐linked P o PD had porous or surface‐adhesive porous morphology with a typical mesoporous character, the specific surface area of the latter was increased obviously from the former. Both of them showed excellent Cu 2+ adsorption capabilities with the maximum adsorption q exp max of 76.51 and 85.49 mg·g −1, and the corresponding removal ratios of 60.21% and 68.39%, respectively. The adsorption capacity was increased to its 1.54 times with pentaerythritol tris[3‐(1‐aziridinyl)propionate] (cross‐linking agent‐III) as cross‐linking agent at pH = 5 and 25°C. Because temperature could affect the adsorption behavior of materials and the adsorption process is endothermic with ΔG < 0, the process should be accompanied by spontaneous chemical changes. The XRD, SEM–EDX mapping and XPS results showed that Cu 2+ was successfully removed from the aqueous solution. Additionally, the adsorption was mainly based on the cation‐π interaction and the formation of Cu‐N bonds. Abstract : A potential solution to overcome the limited Cu2+ removal rate of conducting polymer‐based adsorbents caused by the lack of ion active centers has been provided through cross‐linking modification of poly(o‐phenylenediamine) (PoPD).