try this
Sub exportToPdf()
strFilePath = "D:\test\"
 Application.ScreenUpdating = False
For Each Sh In Sheets
   strPdfName = Sh.Name & ".pdf"
   Sh.Copy
   ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, Filename:=strFilePath & strPdfName, _
   Quality:=xlQualityStandard, IncludeDocProperties:=True, IgnorePrintAreas:=False, _
   OpenAfterPublish:=False
   ActiveWorkbook.Close (False)
Next
Application.ScreenUpdating = True
End Sub