Selectivity, stability and reproducibility effect of CeM - CeO2 modified PIGE electrode for photoelectrochemical behaviour of energy application

Abstract

A novel rice like structure of cerium molybdate [Ce(MoO4)2] and cerium oxide [CeO2] composites were synthesised through co-precipitation and solid-state method. As synthesized samples were characterized via various techniques, such as XRD, FTIR, FESM, HRTEM optical studies. The photocatalysis of congo red (CR) under visible light irradiation elucidates that the CeM-CeO2 photocatalyst showed excellent photocatalytic activity in acidic medium. The degradation efficiency of the photocatalyst was observed around 98% in 75 min. The stability and reusability were checked in four cycles and the results discover brilliant photocatalytic behaviour with negligible amount of photocatalyst proficiency. This outstanding photocatalytic activity is the characteristic of holes and photo-induced electrons generated during degradation process. Furthermore, the electrocatalytic studies was observed to detect non-enzymic glucose in CeM-CeO2 modified PIGE electrode. It displays oxidation peak at 0.8 V at potential ranges from 1.2 to 0.2 V at the scan rate of 50 mVs−1. A novel rice like CeM - CeO2 modified electrode possess good selectivity for glucose detection in presence of other interfering compounds. In addition, CeM - CeO2 modified PIGE showed tolerable results for glucose detection in honey and human blood serum samples. The effective catalytic performance of CeM - CeO2 modified PIGE is owing to the strong interaction between glucose with more active sites present in the CeM - CeO2 heterostructures. Overall, in this present work CeM - CeO2 heterostructures exhibits exceptional results for detection of glucose and degradation of congo red (CR) and it can be used for practical applications.