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首页> 外文期刊>RSC Advances >Very fast catalytic reduction of 4-nitrophenol, methylene blue and eosin Y in natural waters using green chemistry: p(tannic acid)-Cu ionic liquid composites
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Very fast catalytic reduction of 4-nitrophenol, methylene blue and eosin Y in natural waters using green chemistry: p(tannic acid)-Cu ionic liquid composites

机译：使用绿色化学非常快地催化还原天然水中的4-硝基苯酚，亚甲基蓝和曙红Y：对（鞣酸）-铜离子液体复合材料

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Using tannic acid (TA) as a biopolymer, poly(tannic Acid) (p(TA)) microgels were obtained by cross-linking TA with trimethylolpropane triglycidyl ether (TMPGDE) as cross-linker in a water-in-oil micro emulsion system. Ionic liquid forms of p(TA) micro particles were prepared as Ionic Liquid Colloids (ILC) by post chemical modification of p(TA) particles using quaternization agents such as 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPACl) and ammonia (NH3) in aqueous solution to generate positively-charged ammonium salts on the network. Then the modified p(TA) micro particles were used as template for Co, Ni, and Cu metal nanoparticle preparation in situ after loading of metal salts such as CoCl2, NiCl2, and CuCl2 from ethyl alcohol solution into the p(TA) network, and consequent reduction with sodium borohydride (NaBH4). The prepared metal nanoparticle-containing ILCs of p(TA) microgel composites were used as catalysts in the reduction of toxic organic compounds such as 4-nitrophenol (4-NP), eosin Y (EY), and methylene blue (MB). Various parameters affecting the 4-NP and MB reduction were investigated. The activation energy, enthalpy, and entropy for the reduction of 4-NP to 4-AP catalyzed by ILC p(TA)-co composite catalyst system were calculated as 26.19 kJ mol(-1), 23.12 kJ mol(-1), and -182.35 J mol(-1) K-1, respectively.
机译：使用单宁酸（TA）作为生物聚合物，在油包水微乳液体系中通过将三羟甲基丙烷三缩水甘油醚（TMPGDE）作为交联剂将TA交联来获得聚（单宁酸）（p（TA））微凝胶。通过使用季铵化剂（例如3-氯-2-羟丙基三甲基氯化铵（CHPAC1）和氨水）对p（TA）颗粒进行后化学修饰，将p（TA）微粒的离子液体形式制备为离子液体胶体（ILC）。 NH3）在水溶液中生成网络上带正电荷的铵盐。然后，将乙醇溶液中的金属盐（例如CoCl2，NiCl2和CuCl2）从乙醇溶液中装入p（TA）网络后，将改性的p（TA）微粒用作原位制备Co，Ni和Cu金属纳米颗粒的模板，然后用硼氢化钠（NaBH4）还原。制备的含p（TA）微凝胶复合物的金属纳米粒子的ILC用作还原有毒有机化合物（如4-硝基苯酚（4-NP），曙红Y（EY）和亚甲基蓝（MB））的催化剂。研究了影响4-NP和MB减少的各种参数。 ILC p（TA）-co复合催化剂体系催化的4-NP还原为4-AP的活化能，焓和熵分别为26.19 kJ mol（-1），23.12 kJ mol（-1），和-182.35 J mol（-1）K-1。

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