Pure g-C3N4 sample was prepared by thermal treatment of melamine at 520 °C, and iron-modified samples (0.1, 0.3 and 1.1 wt.%) were prepared by mixing g-C3N4 with iron nitrate and calcination at 520 °C. The photocatalytic activity of the prepared materials was investigated based on the photocatalytic reduction of CO2, which was conducted in a homemade batch reactor that had been irradiated from the top using a 365 nm Hg lamp. The photocatalyst with the lowest amount of iron ions exhibited an extraordinary methane and hydrogen evolution in comparison with the pure g-C3N4 and g-C3N4 with higher iron amounts. A higher amount of iron ions was not a beneficial for CO2 photoreduction because the iron ions consumed too many photogenerated electrons and generated hydroxyl radicals, which oxidized organic products from the CO2 reduction. It is clear that there are numerous reactions that occur simultaneously during the photocatalytic process, with several of them competing with CO2 reduction.

Magnetic Fe3O4 nanoparticles “decorated” by Laponite nanodisks have been materialized utilizing the Schikorr reaction following a facile approach; and tested as mediators of heat for the localized magnetic hyperthermia (MH)...

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The Front Cover shows the structure of an unprecedented CuII coordination polymer, which resembles a two‐dimensional square grid architecture. This compound acts as an excellent host for a pharmaceutically important bis(triazole) ligand, namely bis(1,2,4‐triazole)‐trans‐cyclohexane. The self‐assembly of this type of coordination polymers is affected by various kinetic and thermodynamic factors. More information can be found in the https://doi.org/10.1002/ejic.201801138 For more on the story behind the cover research, see the https://doi.org/10.1002/ejic.201900056.

Magnetic nanophases nucleated within horse spleen apoferritin nanotemplates under in vivo physiological conditions and in vitro reconstitution were characterized by Mössbauer spectroscopy in lyophilized form. Mössbauer spectra recorded at 80 K indicate that for the in vivo produced ferritin the presence of phosphates within the ferritin biomineral core results in larger quadrupole splittings, both at interior and surface sites, 0.62 mm/s and 1.06 mm/s, respectively, as compared to 0.56 mm/s and 0.75 mm/s for the reconstituted ferritin. Data collected at lower temperatures give blocking temperatures of 55 and 40 K for in vitro and in vivo samples. At 4.2 K, both samples give similar saturation hyperfine field values for the interior (495 kOe) and surface (450 kOe) iron sites. The temperature dependence of the reduced hyperfine magnetic fields at the interior iron sites is consistent with the collective magnetic excitations model, due to the particle's magnetization precession about the anisotropy axis. In contrast, a marked decrease in the reduced hyperfine field at surface sites with increasing temperature indicates a more complex spin excitation energy landscape at the surface.