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Enhanced Photocatalytic and Fenton-like Performance of CuOx-Decorated ZnFe2O4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-11-22 00:00:00 , DOI: 10.1021/acsami.7b14799 Wei Zhao 1 , Chuan Liang 1 , Beibei Wang 1 , Shengtao Xing 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-11-22 00:00:00 , DOI: 10.1021/acsami.7b14799 Wei Zhao 1 , Chuan Liang 1 , Beibei Wang 1 , Shengtao Xing 1
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A series of CuOx-decorated ZnFe2O4 samples were prepared by a hydrothermal method and investigated as a catalyst for the photocatalytic and Fenton-like degradation of Orange II. The active species and catalyst active sites in the two processes were also studied. It was found that the introduced CuOx significantly enhanced the photocatalytic and Fenton-like performance of ZnFe2O4. Especially, ZnFe2O4–Cu3 prepared with the Cu/Zn ratio of 3:7 exhibited a very high Fenton-like activity in the pH range 5–9. The enhanced photocatalytic activity of ZnFe2O4–Cu3 could be because the formed ZnFe2O4/Cu2O heterojunction improved the separation efficiency of the photogenerated carriers. The photogenerated hole was responsible for Orange II degradation. As for the Fenton-like reaction, •O2– was the active species, and the surface ≡Cu2+ with a higher redox ability should be the active site for H2O2 activation despite its lower surface content than that of ≡Cu+, ≡Fe2+, and ≡Fe3+. Finally, a possible pathway for Orange II degradation was proposed according to the liquid chromatography–mass spectrometry result.
中文翻译：
CuO x修饰的ZnFe 2 O 4的增强的光催化和类Fenton性能
通过水热法制备了一系列的CuO x修饰的ZnFe 2 O 4样品，并研究了其作为Orange II的光催化和Fenton样降解的催化剂。还研究了两种方法中的活性种类和催化剂活性位点。发现引入的CuO x显着增强了ZnFe 2 O 4的光催化性能和类似Fenton的性能。尤其是，以3/7的Cu / Zn比制备的ZnFe 2 O 4 -Cu3在5-9的pH范围内表现出非常高的Fenton样活性。ZnFe 2 O 4的增强的光催化活性–Cu3可能是因为形成的ZnFe 2 O 4 / Cu 2 O异质结提高了光生载流子的分离效率。光生空穴造成了Orange II的降解。至于类Fenton反应，• ö 2 -是活性种，并且表面≡Cu 2+具有较高的氧化还原能力应是用于h的活性位点2 ö 2活化，尽管其下表面含量比≡Cu的+，≡Fe2 +和≡Fe3 +。最后，根据液相色谱-质谱法的结果，提出了橙II降解的可能途径。
更新日期：2017-11-23
中文翻译：
CuO x修饰的ZnFe 2 O 4的增强的光催化和类Fenton性能
通过水热法制备了一系列的CuO x修饰的ZnFe 2 O 4样品，并研究了其作为Orange II的光催化和Fenton样降解的催化剂。还研究了两种方法中的活性种类和催化剂活性位点。发现引入的CuO x显着增强了ZnFe 2 O 4的光催化性能和类似Fenton的性能。尤其是，以3/7的Cu / Zn比制备的ZnFe 2 O 4 -Cu3在5-9的pH范围内表现出非常高的Fenton样活性。ZnFe 2 O 4的增强的光催化活性–Cu3可能是因为形成的ZnFe 2 O 4 / Cu 2 O异质结提高了光生载流子的分离效率。光生空穴造成了Orange II的降解。至于类Fenton反应，• ö 2 -是活性种，并且表面≡Cu 2+具有较高的氧化还原能力应是用于h的活性位点2 ö 2活化，尽管其下表面含量比≡Cu的+，≡Fe2 +和≡Fe3 +。最后，根据液相色谱-质谱法的结果，提出了橙II降解的可能途径。
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