化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (12) : 183-189. DOI: 10.19817/j.cnki.issn1006-3536.2024.12.026

科学研究

氧化亚铜/还原氧化石墨烯复合材料的制备及其光催化性能研究

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Preparation and photocatalytic performance of Cu₂O/rGO composite

Wang Limin^1,2, Liu Haitao¹, Feng Xinran¹, Hu Yue³, Zhang Xinhao^1,2, Zou Lifei^1,2

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Received		Published
2023-11-13		2024-12-20
Issue Date	Revised Date
2024-12-12	2023-11-13

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摘要

通过低温液相沉淀法制备了纳米Cu₂O和Cu₂O/x% rGO(rGO为还原氧化石墨烯,x=0.4%,0.7%,1%)可见光响应型催化剂,对样品进行了X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射(UV-Vis)、光致发光光谱(PL)、红外吸收光谱(FT-IR)、电化学阻抗谱(EIS)、瞬态光电流等表征,并测试了它们在可见光照射下催化降解抗生素的性能。结果表明:与单组分Cu₂O光催化剂相比,负载rGO后光催化效率明显提升,其中Cu₂O/1% rGO催化效果最佳,反应90min时盐酸四环素(TC)去除率可达到71.6%,且循环使用4次性能无明显下降。在降解TC过程中,空穴(h⁺)和羟基自由基(·OH)起主要作用。此外,Cu₂O/1% rGO光催化去除土霉素也表现出良好的效果。

Abstract

The visible light-responsive nano-Cu₂O and Cu₂O/x% rGO (x=0.4%,0.7%,1%) photocatalysts were prepared by low-temperature liquid-phase precipitation method.The samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),ultraviolet-visible diffuse reflection (UV-Vis),photoluminescence spectroscopy (PL),infrared absorption spectroscopy (FT-IR),electrochemical impedance spectroscopy (EIS) and transient photocurrent tests,and their catalytic performance for the degradation of antibiotics under visible light irradiation was tested.The results showed that compared with pure Cu₂O photocatalyst,the photocatalytic efficiency was significantly improved after loading rGO.Among them,Cu₂O/1% rGO exhibited the best catalytic effect,with a removal rate for tetracycline hydrochloride (TC) of 71.6% after 90 min reaction,and there was no significant decrease in performance after four cycles of degradation experiments.In the process of TC degradation,hole (h⁺) and hydroxyl radical (·OH) groups played the main roles.Besides,Cu₂O/1% rGO also exhibited a good performance in the photocatalytic removal of oxytetracycline.

关键词

氧化亚铜 / 石墨烯 / 纳米复合材料 / 光催化 / 抗生素

Key words

cuprous oxide / graphene / nanocomposites / photocatalysis / antibiotics

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氧化亚铜/还原氧化石墨烯复合材料的制备及其光催化性能研究[J]. 化工新型材料, 2024, 52(12): 183-189 DOI:10.19817/j.cnki.issn1006-3536.2024.12.026

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