The g-C₃N₄ porous nanosheets with different loading amount of Ag nanoparticles (NPs) are successfully prepared by a simple liquid-phase reduction method. These Ag/g-C₃N₄ composites have an improved photocatalytic performance for decomposing organic pollutants compared with that of pure g-C₃N₄ nanosheets. Many measurements have been used for characterizing the samples, such as XRD, FTIR, UV-Vis DRS, PL, XPS, EDS, SEM, and TEM. In Ag/g-C₃N₄, the Ag NPs are uniformly coated on the g-C₃N₄ surface, the diameter is mainly in the range of 8~18 nanometers. Loading of Ag NPs expand the response to the visible light for g-C₃N₄ and increasing the producing rate of photogenerated e⁻-h⁺ pairs. The loading of silver NPs obviously enhances the photocatalytic activity of C₃N₄ nanosheets toward the Rhodamine B (RhB) decomposition under the simulated sunlight irradiation. With different loading amounts of Ag NPs, Ag/g-C₃N₄ (3 wt% of Ag) showed the highest photocatalytic activity for RhB decomposition among these as-prepared samples, which is 10 times of the rate of pure C₃N₄. Based on the experimental results, a possible photocatalytic mechanism for Ag/g-C₃N₄ is proposed.

Slight B-site Gd-doped BaFeO_3−δ material exhibits impressive oxygen permeability and excellent long term stability.

An impressive oxygen permeability and good structural stability are achieved by partially replacing Fe with In at the B-site of BaFeO_3−δoxides.

A highly efficient and cost-effective strategy for doping Ca at the B-site of BaFeO_3−δ was demonstrated to enhance oxygen permeability.

Redox stable SrFe_0.75Mo_0.25O_3-δ and SrFe_0.5Mn_0.25Mo_0.25O_3-δ electrode materials were studied in terms of their physicochemical properties and electrochemical performance in symmetrical SOFCs, with focus on their tolerance toward carbon deposition and sulfur poisoning. Both materials possess cubic, B-site cation-disordered Pm-3m structure in air up to high temperatures. SrFe_0.5Mn_0.25Mo_0.25O_3-δ was found to transform to a B-site cation-ordered structure after reduction in dry 5 vol% H₂/Ar at 1100°C, while no structural changes were observed for SrFe_0.75Mo_0.25O_3-δ. Weight change upon annealing up to 850°C in air and in dry 5 vol% H₂/Ar indicated an increase in oxygen deficiency on the order of δ = 0.2. Seebeck coefficient and conductivity dependence on the oxygen partial pressure pO₂ showed that both oxides exhibit p-type conductivity in air and n-type conductivity under reducing conditions. Carbon deposition was found to depend on temperature, gas composition (CO or CH₄), and presence of Ce_0.8Gd_0.2O_1.9 electrolyte in the composite-type electrode. Stable fuel cell performance, without carbon deposition, was obtained for SrFe_0.75Mo_0.25O_3-δ-based SOFC in 10 vol% of CO in CO₂. Also, SOFC operation with CH₄ as fuel was achieved without coking at temperatures ≤ 700°C. However, both oxides suffer from sulfur poisoning-related effects in atmosphere with 800 ppm H₂S.