taken from the article at sourcexpress.com/logout_redirect-filter-hook-introduced-in-wordpress-4-2

This filter comes with 3 parameters, string $redirect_to The redirect destination URL, string $requested_redirect_to The requested redirect destination URL passed as parameter, WP_User $user WP_User object for the user logging out.

Using the third param we can target specific redirect locations depending on the user, user role etc.

function se_logout_redirect( $redirect_to, $requested_redirect_to, $user ) {
	if ( in_array( 'subscriber', $user->roles ) ) {
		$requested_redirect_to = home_url();
	} else {
		$requested_redirect_to = home_url( '/hello-world' );
	}
 
	return $requested_redirect_to;
 
}
add_filter( 'logout_redirect', 'se_logout_redirect', 10, 3 );