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oai:riuma.uma.es:10630/209502026-02-03T12:39:38Zcom_10630_2254col_10630_37957

Salcedo, Inés R. 2021-02-09T12:29:08Z 2021-02-09T12:29:08Z 2021-02-09 https://hdl.handle.net/10630/20950 In this PhD thesis, proton conductivity, photocatalytic and luminescence properties of synthesised multifunctional metal phosphonates have been studied. Iron and zinc derivatives of the R,S hydroxyphosphonoacetic acid (HPAA), M[HO3PCH(OH)CO2]2.5H2O, have been synthesised as well as the corresponding iron-containing bimetallic solid solutions, FexM1-x[HO3PCH(OH)CO2]2.5H2O (M= Mn2+, Co2+ and Zn2+), showing remarkable properties as proton conductors and Photo-Fenton catalyst. These layered solids exhibited NH3/H2O-mediated proton conductivity, which increases with higher amounts of these two guest species (up to 1.8·10-3 S·cm-1). Upon ammonia adsorption, solids become increasingly amorphous, but PDF studies revealed that the local Fe2+ environment was still preserved. Regarding to photocatalytic properties, Fe-HPAA and FexM1-x-HPAA (x > 0.5) are efficient photo-Fenton catalysts for the degradation of recalcitrant pollutants, such as phenol and 4-chlorophenol (~90% TOC removal) and methylene blue (75%). Transition metals and lanthanide 2-[bis(phosphonomethyl)amino]-ethanesulfonate compounds have been obtained by solvo-, hydrothermal or microwave-assisted synthesis: Mn2[(O3PCH2)2-NH-(CH2)2-SO3]·3H2O, o-Mn2HSP, Zn2[(O3PCH2)2-NH-(CH2)2-SO3]/Zn0.4[O3PCH2-NH-CH3]0.4(NH3)2·4H2O, m-Zn2HSP, Zn2[(O3PCH2)2-NH-(CH2)2-SO3]·7H2O, h-Zn2HSP, and Ln[H(O3PCH2)2-NH-(CH2)2-SO3]·2H2O, m-LaH2SP and o-LnH2SP (Ln= Pr, Nd, Sm, Eu, Gd and Tb). eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Polímeros - Tesis doctorales Electrólitos - Tesis doctorales Compuestos organofosforados - Tesis doctorales Electrochemical and photochemical applications of multifunctional metal phosphonates doctoral thesis