Hydrogen Sulfi de Adsorption on Alumina/Graphene Oxide Composites at Ambient Temperature
Authors:   Department of Physics, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand, Hankoy Montree , Kitiwan Mettaya ,   Department of Physics, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Devices and Systems for Energy and Environment Research Unit, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Center of Excellence in Smart Materials Research and Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand, Phrompet Chaiwat ,   Department of Physics, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Center of Excellence in Smart Materials Research and Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand, Ruttanapun Chesta ,   Department of Physics, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Center of Excellence in Smart Materials Research and Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand, Kaewpengkrow Rittichote ,   Rattanakosin College for Sustainable Energy and Environment (RCSEE), Rajamangala University of Technology Rattanakosin, 96 Moo 3 Phutthamonthon Sai 5 Rd., Salaya, Phutthamonthon, Nakhon Pathom, 73170, Thailand, Vichaphund Supawan ,   National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, 12120, Thailand, Atong Duangduen ,   National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, 12120, Thailand, Tunthawiroon Phacharaphon ,   Devices and Systems for Energy and Environment Research Unit, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Center of Excellence in Smart Materials Research and Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand,   Department of Industrial Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
Published: November 2022

Hydrogen sulfi de (H2S) is one of the most common pollutants found in natural gas and industrial waste. Over the few decades, the removal of H2S has become a signifi cant problem. In the fi eld of a clean environment such as water purifi cation and toxic gas removal, graphene oxide (GO) has been found to have advantages. In this study, the infl uence of GO on alumina (Al2O3) as an adsorbent of H2S was examined. A series of Al2O3/GO (AGO) composites with varying graphene oxide addition (0.5–3.0 wt%) were prepared using the high-temperature sintering method. The X-ray diffraction patterns indicate the primary phase of Al2O3 with hexagonal crystal structure for all AGO composites. Raman spectrometry measurements confi rmed that the GO particles were incorporated in AGO composites. The TEM image indicated that GO nanosheets were embedded between Al2O3 grains. The effi ciency of AGO adsorbent at ambient temperature was investigated and compared with the pristine Al2O3 adsorbent. The AGO composites adsorbent demonstrated the H2S breakthrough capacity in the range of 0.07–0.43 mg/g, which is higher than that of pristine Al2O3 (0.06 mg/g). Furthermore, the highest H2S breakthrough capacity of 0.43 mg/g was obtained from AGO containing 3.0 wt% GO. This investigation demonstrates that the AGO adsorbent fabricated using a simple method has the potential to be used for H2S removal at ambient temperature.