您似乎想匹配一组特定的表情符号。

package main

import (
    "fmt"
    "regexp"
)

func main() {
    var emojiRx = regexp.MustCompile(`[\x{1F600}-\x{1F6FF}|[\x{2600}-\x{26FF}]`)
    var s = emojiRx.ReplaceAllString("Thats a nice joke ???????????? ????", `[e]`)
    fmt.Println(s)    
}

请参阅Go演示

注意:

[\x{1F600}-\x{1F64F}][\x{1F680}-\x{1F6FF}]