Activated porous carbon supported Pd and ZnO nanocatalysts for trace sensing of carbaryl pesticide in water and food products

Abstract

Nanomaterials-based sensors are a dire need for credible and accurate determination of pesticides in water and food samples as a monitoring tool. Herein, electrocatalysts of Pd and ZnO NPs supported...

Unveiling the effect of crystallinity and particle size of biogenic Ag/ZnO nanocomposites on the electrochemical sensing performance of carbaryl detection in agricultural products

“…As an effective way, ZnO NPs were combined with noble metal NPs to form metal-metal oxide interfaces. 22,23 The interesting studies of Ag/ZnO NCs have related to their morphology, size, component, and structure via some different synthesis methods, including bio-hydrothermal, 15,24 sol-gel method, 25 photo-chemical reduction, 26 chem-hydrothermal method, 27,28 and mechanochemical method. 29 Almost them displayed the impressive enhancements in electrochemical sensors toward toxic organic compounds.…”

“…In addition, electrochemical sensors are also convenient for on-site determination and point-of-care testing. 11 For example, a novel electrochemical sensor based on graphene oxide-ionic liquid composite modified glassy carbon electrode (GCE) was used for the quick and ultra-sensitive detection of carbaryl with a detection limit (LOD) of 2 × 10 −8 M. 12 Glass carbon electrode (GCE) was modified by a new polyaniline/CoAl-layered double hydroxide composite (PANI/CoAl-LDH) with the carbaryl detection limit of 6.8 × 10 −9 M. 13 Reduced graphene oxide-wrapped silver nanoparticles (Ag@rGO) were utilized to modify the electrode surface with carbaryl being the detection target and the detection limit of 42 × 10 −9 M. 14 Electrocatalysts of Pd and ZnO nanoparticles (NPs) supported on a highly porous framework of activated carbons (APC) were synthesized for electrochemical detection of carbaryl with a detection limit of 10 −8 M. 15 Therefore, it is crucial to develop highly sensitive electrochemical sensors modified with eco-friendly materials to detect carbaryl.…”

Recent Progress in the Application of Palladium Nanoparticles: A Review

“…The polycrystalline ZnO films were crystallized at the (002) and ( 101) orientations of the hexagonal phase; due to this, the ZnO:Pd sensor showed a lower detection limit and a response enhancement factor of between 2 and 7 compared with pure ZnO sensors. Recently, Pd-decorated ZnO NPs were supported on a highly porous framework of activated carbon to achieve an efficient electrochemical sensor for the detection of carbaryl trace [112]. The results revealed a unique oxidative-sensing ability of composite for carbaryl at 0.62 V with a low ∆E (80 mV) as compared to that of a bare glassy carbon electrode (GCE).…”