Low-temperature Synthesis of a-Fe2O3/MWCNTs as Photocatalyst for Degradation of Organic Pollutants

Abstract

The nanoparticles of a-Fe 2 O 3 /multi wall carbon nanotubes (MWCNTs) were successfully fabricated using photolysis and sonication method as a heterogeneous catalyst for photodegradation of 4-chlorophenol. The XRD and SEM were confirmed the supporting and distribution of the MWCNTs between the surface of a-Fe 2 O 3 while, preparing nanoparticles proved also using XRD and SEM. The photocatalyic activity of prepared nanoparticles was investigated using 4-CP. The results appeared converting nearly 98% from 4-chlorophenol to 1,4-benzoquinone with optimum conditions of pH 3, 20 ppm of pollutant and 0.3 g of heterogeneous catalyst.

Semiconductor Metal Oxide Nanoparticles: A Review for the Potential of H2S Gas Sensor Application

“…As a general base, decreasing the size of grain and particles causes increasing the surface area of oxide [29][30][31][32][33][34][35][36][37][38][39][40][41][42] for adsorbing the gas molecules and this leads to higher response of the sensor. As well as decreasing of grain exposes the surface to depletion of electrons during exposing the sensor for air.…”