Here's an example where nbconverts a notebook and a template into a formatted tex file, and then a journal-ready PDF:

https://codeocean.com/capsule/9155944/tree/v1

The nbconvert syntax is

  jupyter nbconvert --exec --to latex --template ieee.tplx --output ../results/editorial.tex editorial.ipynb

and then `pdflatex` converts the tex file to a PDF