Recovering manganese from waste batteries can promote the development of new energy. Herein, nickel sulfate and cobalt sulfate, representative impurities in waste battery leachate, are selected to examine their influence on the crystallization thermodynamics and nucleation of manganese sulfate monohydrate by the alterations in solubility and metastable zone width, and a possible mechanism is proposed based on model analysis.

Iron nanosheets, 70–350 nm thick, coated transparently on glass and WO₃ lenses using ionic technique markedly alter the optical properties of WO₃. Namely, the absorption increases over 240-fold, bandgap is redshifted and dielectric properties are enhanced. The optical conductivity, terahertz cutoff (1.0-30 THz), charge density, and infrared plasmon frequency of WO₃ are also improved. Iron-coated WO₃ is promising for multifunctional optoelectronics.

SrCu1/3Mn1/3W1/3O3 has monoclinic structure with average crystallite size of 36.8 nm. The sample has high dielectric constant, low loss, semiconducting nature and 1.71 eV bandgap energy for possible energy stroage devices and photovoltaic applications

Two morphologies of cerium oxide (CeO₂) abrasive particles, octahedral, and spheroidal, are synthesized by solvothermal method using cerium nitrate hexahydrate (Ce(NO₃)₃-6H₂O) as raw material. Comparing the bandgap energies and the polishing performance of the two types of abrasive particles as well as molecular dynamics simulations reveal that the synthesized octahedral CeO₂ particles possesses higher surface chemical activity and mechanical destructive effect.