Wet chemistry route for the decoration of carbon nanotubes with iron oxide nanoparticles for gas sensing

Abstract

In this work, we investigated the parameters for decorating multiwalled carbon nanotubes with iron oxide nanoparticles using a new, inexpensive approach based on wet chemistry. The effect of process parameters such as the solvent used, the amount of iron salt or the calcination time on the morphology, decoration density and nanocluster size were studied. With the proposed approach, the decoration density can be adjusted by selecting the appropriate ratio of carbon nanotubes/iron salt, while nanoparticle size can be modulated by controlling the calcination period. Pristine and iron-decorated carbon nanotubes were deposited on silicon substrates to investigate their gas sensing properties. It was found that loading with iron oxide nanoparticles substantially ameliorated the response towards nitrogen dioxide.

Preparation of Carbon Nanotubes with Supported Metal Oxide Nanoparticles: Effect of Metal Precursor on Thermal Decomposition Behavior of the Materials

“…Various techniques were developed to modify the CNMs by metal or oxide nanoparticles: traditional wet chemistry routes (impregnation, adsorption, precipitation) [14,[28][29][30][31], thermal decomposition [32], electrochemical deposition [33], hydrothermal synthesis [18], as well as more specific procedures using laser ablation in liquid [34,35] or microwave irradiation [15]. Among the wide range of functionalization strategies one the simplest consists of impregnation of carbon material with a solution of a metal oxide precursor with the subsequent thermal treatment.…”

Polyvinyl alcohol nanofibrous mat impregnated with ClCNTs/Fe2O3 nanocomposite for absorption of diesel oil in water

“…The method used for synthesis of iron oxide nanoparticles and CNT loaded iron oxide nanoparticles were adopted from Mascolo and co-workers [48] and Elnabawy and co-workers [49]. About 1.340 g of FeSO 4 • 7 H 2 O salt was weighed in a beaker and dissolved in 50 ml of previously deoxygenated water (to make a 0.015 mol Fe 2+ solution).…”

Cobalt Species-Loaded MOFs as Chemiluminescent Catalysts for Monitoring Carbendazim

“…However, the major drawbacks that restrain the utilization of metal-based nanoscale catalysts are their poor thermodynamic stability and ease of aggregation, which result in poor reproducibility and low sensitivity. Loading metalbased active sites on porous supports, such as graphene, 7 molybdenum disulfide, 8 and carbon nanotubes, 9 has been proven to be a feasible approach for overcoming the above disadvantages. Although the aggregation of metal nanomaterials is alleviated after forming hybrids with porous supports, the decreased dispersibility in water is still a challenge, hampering their application in CLIA.…”