Synthesis and Characterization of Nano Hybrid Membrane PES-TiO2 for Biogas Purification: Combination Effect of Ultra Violet and Cross-LinkingTutuk Djoko Kusworo, Budiyono Qudratun, Dani Puji Utomo, Iqbal Ryan Ramadhan and IndriyantiMATEC Web Conf., 156 (2018) 08006DOI: https://doi.org/10.1051/matecconf/201815608006