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<p>A facile co-precipitation and hydrothermal method was developed to produce CoFe-LDH/rGO composites as effective catalysts for activating peroxymonosulfate (PMS) to decompose various organic pollutants in water. The degradation rate constant achieved by CoFe-LDH/rGO (1.44&#xa0;min<sup>− 1</sup>) demonstrated a substantial increase of 2.65 and 40 times higher than those by CoFe-LDH and rGO, respectively. The incorporation of rGO increases the surface area of CoFe-LDH/rGO (149.06 m<sup>2</sup>/g) compared to CoFe-LDH (118.92 m<sup>2</sup>/g). After 3.5&#xa0;min, 99.47% Rhodamine B (RhB) was degraded by a catalyst dosage of 40&#xa0;mg/L, PMS concentration of 500&#xa0;mg/L, RhB concentration of 50&#xa0;mg/L, at 30&#xa0;°C, and pH 7.0. Meanwhile, CoFe-LDH/rGO provided good performances across a broad pH range (3–9) with relatively low PMS activation energy (33.18&#xa0;kJ/mol). O<sub>2</sub><sup>•−</sup> and <sup>1</sup>O<sub>2</sub> were the primary reactive oxidation species responsible for the degradation of RhB, resulting in the discovery of nine distinct degradation products.</p>

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Synthesis, characterization, and application of CoFe layered double hydroxide on rGO support for efficient activation of peroxymonosulfate to degrade organic pollutants in water

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Tran Thi Trang,
  • Nguyen Thi Cam Tien,
  • Nguyen Quang Tung,
  • Nguyen Thi Thuy,
  • Kun-Yi Andrew Lin,
  • Nguyen Nhat Huy,
  • Le Viet Ngan,
  • Nguyen Phuong Thao,
  • Nguyen Trung Dung

摘要

A facile co-precipitation and hydrothermal method was developed to produce CoFe-LDH/rGO composites as effective catalysts for activating peroxymonosulfate (PMS) to decompose various organic pollutants in water. The degradation rate constant achieved by CoFe-LDH/rGO (1.44 min− 1) demonstrated a substantial increase of 2.65 and 40 times higher than those by CoFe-LDH and rGO, respectively. The incorporation of rGO increases the surface area of CoFe-LDH/rGO (149.06 m2/g) compared to CoFe-LDH (118.92 m2/g). After 3.5 min, 99.47% Rhodamine B (RhB) was degraded by a catalyst dosage of 40 mg/L, PMS concentration of 500 mg/L, RhB concentration of 50 mg/L, at 30 °C, and pH 7.0. Meanwhile, CoFe-LDH/rGO provided good performances across a broad pH range (3–9) with relatively low PMS activation energy (33.18 kJ/mol). O2•− and 1O2 were the primary reactive oxidation species responsible for the degradation of RhB, resulting in the discovery of nine distinct degradation products.