1. School of Material Science and Engineering Tiangong University Tianjin P. R. China
2. School of Chemical Engineering and Technology Tiangong University Tianjin P. R. China
3. State Key Laboratory of Separation Membranes and Membrane Processes Tiangong University Tianjin P. R. China
4. Sinochem Hebei Co. Ltd. Shijiazhuang P. R. China