Performance and mechanism of FeS₂/FeS_xO_y as highly effective Fenton-like catalyst for phenol degradation

Developing a highly efficient Fenton-like catalyst working in a wide pH range is imperative to accomplish its practical wastewater treatment. Herein, FeS2/FeSxOy catalyst was synthesized by hydrothermal-solvothermal vulcanization with thioacetamide as a sulfur source. Characterization results confirmed FeS2/FeSxOy consisted of pyrite, kornelite, and szomolnokite. FeS2/FeSxOy exhibited superior catalytic activity toward H2O2 activation with more than 96% phenol removal within 5 min in pH 3.0 ∼ 8.0 at 30°C. Radical scavenging experiment and EPR analysis revealed both hydroxyl radicals (·OH) and superoxide anion radicals (O2·-) anticipated in phenol elimination, but ·OH played a dominant role. The detailed degradation experiments and density functional theory (DFT) calculation confirmed the vital role of FeS2 in enhancing phenol abatement. This study not only developed a highly active catalyst for H2O2 activation but also theoretically analyzed the FeS2 function in depth, which provided a guide for designing a highly efficient Fenton-like catalyst.</p

β-Bi₂O₃/SrFe₁₂O₁₉ magnetic photocatalyst: facile synthesis and its photocatalytic activity

At present, dye wastewater is the most difficult industrial wastewater to treat. Photocatalytic degradation of dye wastewater under visible light irradiation is the most potential method. Magnetic photocatalytic material is a very good choice because of its easy separation and without secondary pollution. Based on a comparative study between α-Bi2O3 and β-Bi2O3, β-Bi2O3/SrFe12O19 magnetic photocatalyst was prepared to aim at rhodamine B(RhB) photodegradation. The photodegradation rate of RhB reaches 92.97% after 150 min photocatalytic reaction under visible light irradiation. We hope that this work can provide a reference for dye wastewater treatment.</p

Enhancement mechanism of photocatalytic activity for MoS2/Ti3C2 Schottky junction: Experiment and DFT calculation

Enhancement mechanism of photocatalytic activity for MoS2/Ti3C2 Schottky junction: Experiment and DFT calculatio