To minimize air pollution resulting from exhaust gas emission, a decrease in the concentrations of the sulfur compounds in fuels has become a major issue in the last 10 years. The development of catalysts for the hydrodesulfurization process is a challenge for the oil industry. In the present work, a new and easy way to synthesize Ni-Mo-S hydrotreatment catalysts and in particular the effect of ionic liquids on the final structure was studied. It was shown that the addition of the ionic liquid [BMIM][NTf 2 ] to the main reactants [Ni(NO 3 ) 2 ·6H 2 O and (NH 4 ) 2 MoS 4 ] had a great impact on the [a]

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Magnetic iron oxide nanoparticles were synthesized and stabilized using ammonium cations or poly­(vinyl alcohol) to produce amazing materials such as safer aqueous ferrofluids, ferrogels, ferromagnetic inks, plastics, and nanopowders illustrating how versatile materials can be produced just by simple modifications. The synthesis is fast, reliable, and efficient. It demonstrates many material properties such as magnetism, ferrofluidity, gelation, and so forth.