On the Interactions and Synergism between Phases of Carbon–Phosphorus–Titanium Composites Synthetized from Cellulose for the Removal of the Orange-G Dye Hamad, Hesham Castelo-Quibén, Jesica Morales Torres, Sergio Carrasco Marín, Francisco Pérez Cadenas, Agustín Francisco Maldonado Hodar, Francisco José Microcrystalline cellulose Chemical functionalization Polyphosphates Synergism Physicochemical properties Orange G Photocatalysis Carbon–phosphorus–titanium composites (CPT) were synthesized by Ti-impregnation and carbonization of cellulose. Microcrystalline cellulose used as carbon precursor was initially dissolved by phosphoric acid (H3PO4) to favor the Ti-dispersion and the simultaneous functionalization of the cellulose chains with phosphorus-containing groups, namely phosphates and polyphosphates. These groups interacted with the Ti-precursor during impregnation and determined the interface transformations during carbonization as a function of the Ti-content and carbonization temperature. Amorphous composites with high surface area and mesoporosity were obtained at low Ti-content (Ti:cellulose ratio = 1) and carbonization temperature (500ºC), while in composites with Ti:cellulose ratio = 12 and 800ºC, Ti-particles reacted with the cellulose groups leading to different Ti-crystalline polyphosphates and a marked loss of the porosity. The efficiency of composites in the removal of the Orange G dye in solution by adsorption and photocatalysis was discussed based on their physicochemical properties. These materials were more active than the benchmark TiO2 material (Degussa P25), showing a clear synergism between phases. 2019-04-29T10:42:07Z 2019-04-29T10:42:07Z 2018-09-18 info:eu-repo/semantics/article Hamad, H.[et al.]. On the Interactions and Synergism between Phases of Carbon–Phosphorus–Titanium Composites Synthetized from Cellulose for the Removal of the Orange-G Dye. Materials 2018, 11, 1766; doi:10.3390/ma11091766. 1996-1944 http://hdl.handle.net/10481/55523 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI