Xhaka was able to regain some match fitness over the worldwide break, turning out for Switzerland in two 90-minute appearances.
'He's coming back better, his mindset now is better to help us, and to be closer to play when we need him, ' Emery said.
Xhaka has been on worldwide duty with Switzerland over the past two weeks and Emery said the player "is coming back better in his mind" and "wants to come back with confidence (of) the supporters".
Arsenal, without a win in four Premier League matches, are sixth in the table, eight points behind the top four, but Emery was positive they could narrow the gap.
Xhaka has said ongoing social media abuse aimed at his family was one of the reasons behind his furious reaction to fans in the game against Palace.
"It was good for players, I think, that we worked very hard and tried to show them how it can work".
'My objective is going to be his comeback, him helping us and also convincing every supporter of his commitment with us and his performances are going to be better and (they) are going to be proud of him in the shirt.
Emery reiterated the view that Xhaka, who was quoted this week in the Swiss media as saying he "can't accept what has happened with me", is committed to the club.
"He is feeling better and also feeling that his team is Arsenal now. But I think, little by little, we can help him come back and connect with us and our supporters".
"I think to find this behaviour back was the main work we wanted to do the last two weeks".
Spurs sacked Pochettino earlier this week after five years in charge of the North London club, the Argentine being swiftly replaced by Jose Mourinho following the club's disappointing start to the new season. "[Mourinho] is a very good coach".
'Probably the last matches they didn't develop a factual end result but within the last yr with Pochetinno changed into ideal.