Asymmetric Triple Catalytic Sites on Ternary‐Metal Sulfides Enable Superior Radical‐Nonradical Synergy in Water Purification
Asymmetric Triple Catalytic Sites on Ternary‐Metal Sulfides Enable Superior Radical‐Nonradical Synergy in Water Purification
研究概述
研究内容请参见论文原文。
谱图与表征信息
Figure 2. Characteristics of FeCoNi and FeCoNiS4. TEM images and the corresponding EDX elemental mapping images for a) FeCoNiS4 and b) FeCoNi. Normalized c) Fe, d) Co, and e) Ni K-edge XANES spectra for FeCoNi, FeCoNiS4, and the relevant references (i.e., Fe foil, Co foil, Ni foil, Fe2O3, Co3O4, and NiO). f) Co K-edge FT-EXAFS spectra for FeCoNi, FeCoNiS4, and the relevant references (i.e., Co foil, Co3O4, and Co3S4). WT-EXAFS contour plots for g) FeCoNiS4 and Co3S4, h) FeCoNi and Co foil.
Figure 3. Catalytic performance and mechanism for FeCoNiS4. a) SMX degradation rate, TOC removal rate, and TOC removal efficiency using FeCoNi and FeCoNiS4. b) Comparison of organic pollutant degradation in various PMS activation systems. c) DMPO-trapped EPR spectra in different systems (PMS alone, FeCoNi/PMS, and FeCoNiS4/PMS). d) TEMP-trapped EPR spectra in different systems (PMS alone, FeCoNi/PMS, and FeCoNiS4/PMS). e) Quantitative determination of average ROS concentration in FeCoNi and FeCoNiS4 activated systems. f) Quantitative determination of PMS consumption and total 1O2 generation in different systems (FeCoNi/PMS, FeCoNiS4/PMS, and bare PMS). g) The scheme illustrating the change of ROS contribution for SMX degradation in FeCoNi and FeCoNiS4 activated systems. h–j) In situ XAS measurements during PMS activation: normalized Fe, Co, and Ni K-edge XANES spectra and the corresponding electron transfer scheme for FeCoNiS4.