The authors acknowledge funding from the Federal Ministry of Education and Research (BMBF) for funding of the Young Investigator Group Perovskite Tandem Solar Cells within the program “Materialforschung für die Energiewende” (grant no. 03SF0540), the Helmholtz Association within the HySPRINT Innovation lab project, and the HyPerCells joint Graduate School. This research was supported by the joint agreement between the DAAD (German Academic Exchange Service) and FONDECYT (National Fund for Scientific, Technological Development and Technological Innovation) under the agreements 57508544 DAAD and 423-2019-FONDECYT. Further support has been provided by the PUCP vice chancellorship for research (VRI, project no. CAP-2019-3-0041/702). The authors thank Thomas Lußky for technical support, Bor Li for part of the sample preparation, and Norbert Koch, David Cahen, Isaac Balberg and Norbert N...

In this study, magnetic nanocomposites were developed and used as adsorbents for lead and copper from aqueous media. Structural, surface, magnetic and textural properties of functionalized maghemite nanoparticles synthesized by alkaline co-precipitation were studied. The surfaces of the iron oxide nanoparticles (Nps) were modified with different chemical agents such as fatty and amino acids, silica (SiO2), mesoporous silica (SBA-15), hydroxyapatite, multiwall carbon nanotubes (MWCNTs) and ethylenediaminetetraacetic acid (EDTA), obtaining NPs with mean particle sizes ranging from 7 to 16 nm according to Rietveld refinement and TEM images analysis. The physicochemical surface properties of the functionalized materials were studied via zeta potential (z) and Fourier transform infrared (FTIR) spectroscopy. Mossbauer spectroscopy (MS) as a function of temperature and DC magnetometry were ¨ u...