Preparation, characterization and NH3-sensing properties of reduced graphene oxide/copper phthalocyanine hybrid material

Effect of covalent and non-covalent linking of zinc(II) phthalocyanine functionalised carbon nanomaterials on the sensor response to ammonia

“…The recovery time of pristine rGO is also higher than that found for its hybrids; it decreases from 140 s to 90 s for both hybrids. This can be explained by faster desorption of NH 3 molecules from the surface of SWCNT shielded by phthalocyanine molecules where the latter usually having a shorter recovery time than nanocarbon materials [25,26].…”

“…A double-layer consisted of rGO and polyethylenimine (PEI) has been exhibited better sensor response toward CO 2 and shorter recovery time than the pristine rGO and rGO/PEI mixed layers. It has already been shown elsewhere [24][25][26] that functionalisation with metal phthalocyanines (MPc) may improve the solubility and sensor properties of these carbon materials. Actually, phthalocyanines are known to exhibit high electron charge transfer due to their π-conjugated system [27].…”

Improved Cl2 sensing characteristics of reduced graphene oxide when decorated with copper phthalocyanine nanoflowers

“…NO gas sensor with detection limit as low as 420 ppb with response time of 1000 s have been reported by Li et al 26 Inkjet printed rGO based Cl 2 sensor exhibited response time of 2-3 minutes and recovery time of 2 hours with detection limit of 100 ppm. 27 To overcome the issues of lower sensitivity, slow recovery time and detection limit in rGO based sensors, rGO has been functionalized with different metals, 28,29 metal oxides, [30][31][32] organic molecules 33,34 and polymers. 35,36 Such functionalization of rGO, not only improves the gas sensing parameters but also enhances their selectivity to a particular type of chemical species.…”

Improved NADH Electroanalysis on Nickel(II) Phthalocyanine Tetrasulfonic Acid/ Calf Thymus Deoxyribonucleic Acid/Reduced Graphene Oxide Composite

“…24 In addition, these molecular catalysts show high chemical, mechanical and thermal stability, 25 and they can adsorb on the surface of graphene without disturbing its electronic configuration. 26,27 In this sense, the present work reports the development of an electrochemical sensor as a novel and efficient alternative for NADH oxidation and electroanalysis with a wide linear response range at low overpotential using as mediator the hybrid material CT-DNA/NiTsPc/rGO.…”