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首页> 外文期刊>ACS Omega >Transformation of Nanostructures Cu2O to Cu3Se2 through Different Routes and the Effect on Photocatalytic Properties
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Transformation of Nanostructures Cu2O to Cu3Se2 through Different Routes and the Effect on Photocatalytic Properties

机译：不同途径和对光催化性质的影响，将纳米结构Cu2O转化为Cu3Se2

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In this work, copper selenide (Cu_(3)Se_(2) umangite phase) was synthesized by two routes, using a chemical reaction and the hydrothermal method to obtain CuSe-A and CuSe-H, respectively. The synthesis of Cu_(3)Se_(2) consisted of a three-step process: in the first step, copper(I) oxide hexapods (Cu_(2)O) were obtained as the copper reservoir; in the second step, selenium ions were obtained from the reduction of selenium powder; and in the third step involves mixing two precursors following the two synthesis routes mentioned before. Analysis of X-ray diffraction and X-ray photoelectron spectroscopy showed the formation of the Cu_(3)Se_(2) phase by both synthesis routes. On the other hand, using the scanning electron microscopy (SEM) technique, it is observed that the Cu_(3)Se_(2) sample (CuSe-A) is obtained by exchanging in solution with agitation and that the copper selenium phase grows only on the surface of the hexapods. Meanwhile, the hydrothermal route promotes a total conversion of copper(I) oxide hexapods to the copper selenide phase (CuSe-H). The resulting materials were tested as photocatalytic materials to remove methylene blue dye in water under sunlight irradiation. Cu_(3)Se_(2) (CuSe-H) obtained by the hydrothermal route exhibited a higher efficiency of photodegradation of dye, reaching a removal percentage of 92% after 4 h under sunlight.
机译：在这项工作中，使用化学反应和水热法分别通过两条途径合成硒化烯烯（Cu_（3）Se_（2）倍相），以获得CUSE-A和CUSE-H。 Cu_（3）Se_（2）的合成由三步方法组成：在第一步中，获得铜（I）氧化铜己烯（Cu_（2）O）作为铜储存器;在第二步中，从硒粉的还原中获得硒离子;在第三步中，涉及在以前提到的两个合成途径之后混合两个前体。 X射线衍射和X射线光电子能力的分析显示通过合成途径形成Cu_（3）Se_（2）相。另一方面，使用扫描电子显微镜（SEM）技术，观察到Cu_（3）Se_（2）样品（CuSe-A）通过在溶液中与溶液交换而获得，并且仅铜硒相增长在六角形的表面上。同时，水热途径促进铜（I）氧化铜六己酮的总转化为硒化铜相（CuSe-H）。将所得材料作为光催化材料测试，以在阳光照射下除去水中的亚甲基蓝染料。通过水热路径获得的Cu_（3）SE_（2）（CuSe-H）表现出更高的光降解染料效率，在阳光下在4小时后达到92％的去除率。

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