I agree with a.l.e: Unless you are absolutely sure that your audience will both understand
and appreciate your use of emojis, don't use them.
Use of emojis can seriously damage your credibility in the eyes of your readers. There have been plenty of studies which show that most people think a person using emojis is less competent than someone using the same text without the emojis.
I understand that emojis can be useful as a shorthand when they are used within a small group where everyone knows each other well enough to understand what the emojis mean within that context, but outside of that group the meaning can be, at best, confusing.
For example, you and your friends might know what you mean by using "Supervillain, Mango, Fire Extinguisher", but most people won't.
For another example, say you add a "Zombie" to the end of a message, what does that mean to the reader? Are you saying that you feel like a zombie, or that you are calling the reader a zombie, or something else? The meanings of words can change over time but the meanings of emojis can change almost overnight while the document they're in could be around for decades.
The text of an article and the type of language used should be enough to get the message across.
Consider these two pieces of text:
"OMG! Fido's dead!

Poor old Lab. Such a shame. RIP Fido!

"
versus
"We regret to announce that loyal friend and companion Fido the Labrador passed away yesterday."
They both say pretty much the same thing but one is much more appropriate than the other.
Feel free to use emojis if you want to, but be ready to have to explain why you have done so.