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Material Sciences 2021
Co2+掺杂Zn0.5Cd0.5S固溶体的制备及其光催化CO2还原性能研究
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Abstract:
通过水热法制备了Zn0.5Cd0.5S固溶体和掺杂Co2+分别为0.5%、1%和2% (摩尔百分比)的Zn0.5Cd0.5S/Co掺杂型光催化剂。采用了X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外–可见光分光光度计(UV-vis)和光致发光(PL)对材料进行了表征，并测试了可见光下光催化CO2还原活性。结果表明：Co2+掺杂后的催化剂结构与形貌没有发生显著变化，但是能带结构发生了明显调整；其中Zn0.5Cd0.5S/Co-1%催化剂在K2SO3/KHCO3液相体系，可见光辐射(λ > 420 nm)下CO2还原活性明显优于初始Zn0.5Cd0.5S材料。为高效光催化剂的构建提供了一种简易的方法。
Zn0.5Cd0.5S solid solution and Co2+ doped Zn0.5Cd0.5S photocatalysts were successfully synthesized by hydrothermal method. The concentrations of Co2+ are 0.5 mol%, 1 mol% and 2 mol%, respectively. X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet-visible spectrophotometer (UV-vis) and photoluminescence (PL) were used to characterize, and the photocatalytic CO2 reduction performance was measured under visible light. The results showed that the structure and morphology of Zn0.5Cd0.5S/Co did not change significantly, but the energy band structure was remarkably adjusted. Under the K2SO3/KHCO3 liquid system and visible light radiation (λ > 420 nm), the Zn0.5Cd0.5S/Co-1 sample presented better CO2 reduction performance than the pristine Zn0.5Cd0.5S. It provides a simple method for the construction of high-efficiency photocatalytic systems.
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