How to find out to which journal(s) I could hand in my paper?
Considering you are talking about publishing papers based on PhD content it would be usual in most STEM fields for your doctoral supervisor(s) to be involved in this. As such, one or all of them would be worth discussing this question with as they're likely to have the best read on what / where is appropriate. At the very least they should be able to consult with or introduce you to a colleague more familiar with your specific work direction. That said it would be sensible to consider where your dissertation / lit review sources were published, as suggested in the comments, and to come up with some possible choices of your own before approaching your former supervisors