Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
56781 | Catalysis Today | 2010 | 4 Pages |
The aim of this investigation is to quantify surface oxygen groups on an activated carbon by combining the results from temperature programmed desorption (TPD) and diffuse reflectance FT-IR spectroscopy (DRIFTS). A commercial activated carbon was oxidized with ozone to form surface oxygen groups. Afterwards the samples were heated in TPD experiments up to 500 °C. The evolved gases were detected and quantified via IR spectroscopy and DRIFT spectra were collected from the heat-treated samples. Simulation of the DRIFT spectra with a set of Gauss functions led to identification of four surface oxygen groups in the range of 1500–1950 cm−1. Specific concentrations of the four groups can be calculated with the conversion factors obtained by combining TPD and DRIFTS information.