Disodium ethylenediaminetetraacetate

Ti₃AlC₂ powder was purchased from JILIN 11 Technology Co. LTD. (China). Lithium fluoride (LiF, >99.99%), chromium(III) nitrate nonahydrate (Cr(NO₃)₃·9H₂O, 99%), hydrochloric acid (HCL), N,N-dimethylformamide (DMF, 99%), terephthalic acid (H₂BDC, TPA, 98%), benzoquinone (BQ, 98%), silver nitrate (AgNO₃, 99%), carbon tetrachloride (CCl₄), tret-butanol (t-BuOH), disodium ethylenediaminetetraacetate (Na₂-EDTA, 99%), hydrogen peroxide (H₂O₂, 30%), ethanol (C₂H₅OH), SD, AAP, sodium hydroxide (NaOH, 98%), potassium iodide (KI, 99%), ammonium molybdate tetrahydrate ((NH₄)₆Mo₇O₂₄·4H₂O, 99.9%), and potassium hydrogen phthalate (KHC₈H₄O₄, 99.5%) were obtained from Sigma Aldrich. All the chemicals purchased were of analytical grade and were used without further purification.

Low molecular weight chitosan (LCS) is a commercial material provided by Qingdao Yunzhou Biotechnology Co., Ltd. (China). It's deacetylation degree >90%, average molecular weight (Mw) of 3 kDa. Chitooligosaccharide (COS) with a molecular weight of 1.1 kDa was prepared in our laboratory by the combined degradation of microwave and acetic acid. Tris (Tris), Reduced Coenzyme I (NADH), Safranine O, Nitrotetrazolium Blue (NBT), Phenazine Potassium Sulfate (PMS), 1,1-Diphenyl-2-Trinitrophenylhydrazine (DPPH) was purchased from Sigma Chemicals Co. Disodium hydrogen phosphate dodecahydrate, sodium dihydrogen phosphate dihydrate, ferrous sulfate, disodium ethylenediaminetetraacetate (EDTA), absolute ethanol, 30% hydrogen peroxide (H₂O₂), 1-ethyl-(3 -Dimethylaminopropyl)carbodiimide hydrochloride (EDC·HCl), N-hydroxysuccinimide (NHS), 2-morpholinoethanesulfonic acid (MES), salicylic acid (BHA), α-naphthylacetic acid (NAA), indole-3-butyric acid (IBA). All other chemicals and reagents were of analytical grade and were used without further purification.