Sodium hypophosphite

1,10-diaminodecane (DMD) was purchased from Wuxi Yinda Co., Ltd. Terephthalic acid (PTA) was purchased from Jinan Mingxin Chemical Co., Ltd. 1,12-dodecanedicarboxylic acid (TDA) was purchased from Wuhan Yuancheng Group. Benzoic acid (BA) and sodium hypophosphite (SHP) were purchased from Shanghai Macklin Biochemical Co., Ltd. Concentrated sulfuric acid (96%) and N, N-dimethylformamide (DMF) were purchased from Beijing Chemical Reagent Company. All the reagents were used without future purification.

Melamine foam (MF) sponges were purchased from Shanghai Beiyou Construction Materials Co., Ltd., China. Tin (II) chloride (SnCl₂·2H₂O), nickel chloride (NiCl₂·6H₂O), sodium citrate (C₆H₅Na₃O₇·2H₂O), sodium hypophosphite (NaH₂PO₂), ammonium hydroxide (NH₃·H₂O), and polyethylene oxide (PEO, $\overline{M_{\text{v}}}$  ≈ 1.0 × 10⁶ g mol⁻¹) were procured from Macklin Biochemical Co., Ltd., Shanghai, China. Palladium (II) chloride (PdCl₂) was obtained from Sinopharm Chemical Reagent Co., Ltd., China. Hydrochloric acid (HCl, 37 wt%) was acquired from Chongqing Chuandong Chemical Co., Ltd., China. Multiwalled carbon nanotube (CNT, > 90%) with an external diameter of 10–20 nm and a length of < 30 μm was provided by Chengdu Organic Chemicals Co., Ltd., China. Dichloromethane (CH₂Cl₂, > 99.5%) was supplied by Tianjin Fuyu Fine Chemical Co., Ltd., China. Poly (butylene adipate-co-terephthalate) (PBAT) with a density of 1.21 g cm⁻³ and $\overline{M_{\text{w}}}$ =1.42 × 10⁵ g mol⁻¹ was achieved from Xinjiang Blue Ridge Tunhe Chemical Industry Joint Stock Co., Ltd., China.

Cobalt nitrate hexahydrate (Co(NO₃)₂·6H₂O, 99.9%), zinc nitrate hexahydrate (Zn(NO₃)₂·6H₂O, 99.9%), 2-methylimidazole (C₄H₆N₂, 99.9%), nickel(II) chloride (NiCl₂, 99%), sodium chloride (NaCl, 99%), ammonium chloride (NH₄Cl, 99%), potassium hydroxide (KOH, 99%) and sodium hypophosphite (NaH₂PO₂·H₂O, 99%) were purchased from Macklin Biochemical Co., Ltd. (Shanghai, China). Sodium dodecyl sulfate (C₁₂H₂₅SO₄Na, 99%), hydrochloric acid (HCl, 99%) and nickel foam were sourced from Kemate Chemical Technology Co., Ltd. (Tianjin, China). All other chemicals used in the experiment were analytical grade and purchased from commercial suppliers.