Background : Photocatalysis for the production of solar fuels and particularly to perform CO2 reduction with a sufficiently high efficiency depends to the presence of H2 and absence of H2O using graphene doped Ni/ NiO nanocomposite.
Objective : To examine the methane production from carbondioxide in polluted areas using graphene doped Ni/ NiO nanocomposite via photocatalysis with the use of dimethylaniline and xylene as electron donors.
Methods : With 2 mg/l graphene doped Ni/ NiO nanocomposite with a Ni content of 19% wt from 786 μmol/h CO2 gas 563 μl CH4/g Ni.h was obtained at 160oC temperature and the quantum yield was detected as 1.99%. It was found that H2O has a negative influence on the photocatalytic activity. Under continuous flow operation, water molecules were easier desorbed from the graphene doped Ni/NiO photocatalyst
Results : The maximum CH4 production rate was 650 μl/h for 2.4 mg of graphene doped Ni/ NiO nanocomposite after a detectione time of 17 min. Dimethylaniline and xylene were used as electron donors and 1.2 ml/l dimethylaniline and 0.9 ml/l xylene enhanced the CH4 productions by 8% and 12% as quenching factor.
Conclusion : Photocatalysis methods was effected for methane production from carbondioxide in polluted areas using graphene doped Ni/ NiO nanocomposite with the use of dimethylaniline and xylene as electron donors.
Keywords: Carbondioxide; graphene doped Ni/NiO; methane; nanocomposite; nanoparticle; photocatalysis.