1. Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, Osterfelder Straße 3, D-46047 Oberhausen, Germany
2. Inorganic Chemistry I, Ruhr University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany
3. DSM Nutritional Products AG, Wurmisweg 576, CH-4303 Kaiseraugst, Switzerland
4. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China