PMID- 37273509 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230606 IS - 2296-2646 (Print) IS - 2296-2646 (Electronic) IS - 2296-2646 (Linking) VI - 11 DP - 2023 TI - Co-assembly of graphene/polyoxometalate films for highly electrocatalytic and sensing hydroperoxide. PG - 1199135 LID - 10.3389/fchem.2023.1199135 [doi] LID - 1199135 AB - Graphene oxide (GO) films mixed with polyethylenimine (PEI) were prepared by a layer-by-layer assembly (LBL) method, in which the GO component is then converted to reduced GO (rGO) in situ through an electron transfer interaction with a polyoxometalate (POM) that is assembled on the outer surface. With this, devices were manufactured by spreading composite films of (PEI/rGO)(n)-POM with different numbers of PEI/rGO layers on ITO substrates. Cyclic voltammetry (CV) reveals that the catalytic activity for H(2)O(2) of (PEI/rGO)(n)-POM films was significantly higher than that of similar films of (PEI/GO)(n)/PEI/POM manufactured LBL with the same number of layers, although the catalyst POM content of (PEI/rGO)(n)-POM was only half that of (PEI/GO)(n)/PEI/POM. The catalytic activity of (PEI/rGO)(n)-POM films first increases and then decreases as the number of PEI/rGO layers increases. The result shows that (PEI/rGO)(3)-POM films with three PEI/rGO layers exhibit the highest efficiency. Amperometric measurements of the (PEI/rGO)(3)-POM films showed improved current response, high sensitivity, wide linear range, low detection limit, and fast response for H(2)O(2) detection. The enhanced catalytic property of (PEI/rGO)(n)-POM films is attributed to the electron transfer interaction and electrostatic interaction between POM and rGO. CI - Copyright (c) 2023 Bao, Chen, Wang, Liu, Wang, Li and Feng. FAU - Bao, Yayan AU - Bao Y AD - School of Chemistry and Material Science, Shanxi Normal University, Linfen, China. AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Chen, Zezhong AU - Chen Z AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Wang, Yuzhen AU - Wang Y AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Liu, Lizhen AU - Liu L AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Wang, Haiyan AU - Wang H AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Li, Zuopeng AU - Li Z AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. FAU - Feng, Feng AU - Feng F AD - School of Chemistry and Material Science, Shanxi Normal University, Linfen, China. AD - College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, China. LA - eng PT - Journal Article DEP - 20230518 PL - Switzerland TA - Front Chem JT - Frontiers in chemistry JID - 101627988 PMC - PMC10233151 OTO - NOTNLM OT - H2O2 OT - composite film OT - electrocatalytic OT - graphene OT - polyoxometalate COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/06/05 13:04 MHDA- 2023/06/05 13:05 PMCR- 2023/01/01 CRDT- 2023/06/05 11:47 PHST- 2023/04/03 00:00 [received] PHST- 2023/05/03 00:00 [accepted] PHST- 2023/06/05 13:05 [medline] PHST- 2023/06/05 13:04 [pubmed] PHST- 2023/06/05 11:47 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 1199135 [pii] AID - 10.3389/fchem.2023.1199135 [doi] PST - epublish SO - Front Chem. 2023 May 18;11:1199135. doi: 10.3389/fchem.2023.1199135. eCollection 2023.