Precursor concentration Alternative fuels 1 Argon 1 Band gap energy 1 Biodiesel 1 Biodiesel production 1 Carrier gas 1 Catalyst activity 1 Copper 1 Crystalline structure 1 CuI thin films 1 Deposition 1 Deposition methods 1 Deposition process 1 Dye-Sensitized solar cell 1 Energy gap 1 Fossil fuel sources 1 Fossil fuels 1 Heterogeneous catalyst 1 Inorganic compounds 1 Lime 1 Mesoporous matrix 1 Mesoporous structures 1 Nano-structured 1 Nanocatalysts 1 Oil shale 1 P-type 1 Palm oil 1 Sol-gel process 1 Sol-gels 1