Abstract

Fe/graphene oxide and Cu–Fe/graphene oxide nanocomposite were synthesized by the atomic implantation method to study the photocatalytic degradation of dichlorodiphenyltrichloroethane (DDT). The synthesized nanocomposites were characterized by the XRD, N₂ isotherms, SEM with EDX, TEM and XPS analysis. Characterization results have reported that oxides of Cu and Fe were uniformly distributed on graphene oxide and exited in the form of Cu⁺ and Fe²⁺ ions in Cu–Fe/graphene oxide nanocomposite. The high photocatalytic DDT removal efficiency 99.7% was obtained for Cu–Fe/graphene oxide under the optimal condition of 0.2 g/L catalyst, 15 mg/L H₂O₂ and pH 5. It was attributed to the reduction of Fe³⁺ to Fe²⁺ by Cu⁺ ions and –OH radicals formation. However, it was dropped to 90.4% in the recycling study by leaching of iron and without a change in phase structure and morphology.

Graphic Abstract

中文翻译：

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Cu-Fe掺入石墨烯-氧化物纳米复合材料作为高效降解水溶液中二氯二苯基三氯乙烷（DDT）的催化剂

摘要

通过原子注入法合成了Fe /氧化石墨烯和Cu-Fe /氧化石墨烯纳米复合材料，以研究二氯二苯基三氯乙烷（DDT）的光催化降解。通过XRD，N ₂等温线，具有EDX的SEM，TEM和XPS分析对合成的纳米复合材料进行了表征。表征结果表明，Cu和Fe的氧化物均匀分布在氧化石墨烯上，并以Cu ⁺ Fe /氧化石墨烯纳米复合材料中的Cu ⁺和Fe ²⁺离子形式存在。在0.2 g / L催化剂，15 mg / LH ₂ O ₂和pH 5的最佳条件下，Cu-Fe /氧化石墨烯对DDT的去除率高达99.7％。这归因于Fe ³⁺的还原通过Cu ⁺离子和-OH自由基形成Fe ²⁺。但是，在回收研究中，由于铁的浸出，其含量降至90.4％，且相结构和形态没有变化。

图形摘要