The manuscript first reviews the preparation of valuable aromatic carboxylic acids by visible-light-driven carboxylation with CO₂.

Photo-induced self-catalytic redox reaction of nano Bi₂MoO₆ for solar energy harvesting and pseudo-capacitance charge storage.

Na doping is introduced to improve the electrochemical properties of Li_1.2Mn_0.6Ni_0.2O₂ cathode material, which is synthesized by sol–gel method. The effect of Na doping on the morphological, structural and electrochemical properties was systematically studied and analyzed. These results illustrate that lattice layer spacing is enlarged by Na doping, which is beneficial for the diffusion of Li-ion, and the voltage fading is successfully suppressed. The best electrochemical properties were obtained when Na doping amount is approximately 1%, which is attributed to the stronger structural stability and better reversibility of Li⁺ during the initial charge and discharge process.