Enhanced selective adsorption ability of Cu 2 O nanoparticles for anionic dye by sulfur incorporation

摘要: Cu2O-based materials are potential adsorbents for the removal of anionic dyes pollutions. Herein, sulfur incorporation is designed to promote adsorption capacity Cu2O. A series sulfur-incorporated Cu2O nanomaterials synthesized by a facile chemical reduction method. Sulfur favors formation small sized S-Cu2O particles in range 50–100 nm and their enhanced performances. The show good activities methyl orange solution (75–500 mg L−1) under pH 6–10 at room temperature. superior 1485.24 mg g−1 achieved on adsorbent. Adsorption behaviors adsorbent fit well with Langmuir isotherm pseudo-second-order kinetic model. thermodynamic results indicate exothermic spontaneous process. Anionic dye can be adsorbed selectively separated from cationic dyes. Density functional theory calculations prove pronounced electron accumulation sites, benefiting S-Cu2O. nonmetallic element improving metal oxide provided as promising strategy other adsorbents.