Verb + direct object, no preposition
utiliser
no preposition
The constructions
no prepositionutiliser quelque chose
J'utilise un stylo bleu.
Do not writeJ'utilise d'un stylo bleu.
Why
Utiliser is direct: utiliser un outil, utiliser un mot. Its synonym se servir de takes de: je me sers d'un stylo. Two ways to say the same thing, and only the second has a preposition.