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首页> 美国卫生研究院文献>Heliyon >Enhanced photocatalytic activity against crystal violet dye of Co and In doped ZnO thin films grown on PEI flexible substrate under UV and sunlight irradiations
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Enhanced photocatalytic activity against crystal violet dye of Co and In doped ZnO thin films grown on PEI flexible substrate under UV and sunlight irradiations

机译：在紫外线和阳光照射下增强了对在PEI柔性基板上生长的Co和In掺杂的ZnO薄膜的结晶紫染料的光催化活性

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摘要

This work is focused on the photocatalytic activities of undoped ZnO, Co (1%) doped ZnO (CZO) and In (1%) doped ZnO (IZO) thin films grown on flexible PEI (Polyetherimide) substrate by spray pyrolysis. The photodegradation of crystal violet dye was investigated under UV and sunlight irradiations. Doping and excitation energy effects on photocatalytic efficiencies are discussed. All ZnO thin films show high photocatalytic efficiency up to 80% under either UV or sunlight irradiations for 210 min. However, CZO has the higher photocatalytic performance under UV irradiation. While, the photodegradation efficiency of IZO was enhanced under sunlight irradiation due to the narrowing of its optical gap. These results are discussed based on structural, morphological and optical investigations. The photocatalytic stability of ZnO films was studied as well. So, after three photocatalysis cycles, all ZnO thin films still effective. The obtained results are promising for the use of doped ZnO/PEI as talented photocatalysts for applications in large surfaces with various geometries for photodegradation of hazardous pollutants.
机译：这项工作的重点是通过喷雾热解法在柔性PEI（聚醚酰亚胺）衬底上生长的未掺杂ZnO，Co（1％）掺杂的ZnO（CZO）和In（1％）掺杂的ZnO（IZO）薄膜的光催化活性。在紫外线和阳光照射下研究了结晶紫染料的光降解。讨论了掺杂和激发能对光催化效率的影响。所有的ZnO薄膜在210分钟的紫外线或阳光照射下均显示高达80％的高光催化效率。但是，CZO在紫外线照射下具有较高的光催化性能。同时，由于IZO的光学间隙变窄，其在阳光照射下的光降解效率得到提高。这些结果是基于结构，形态和光学研究进行讨论的。还研究了ZnO薄膜的光催化稳定性。因此，在三个光催化循环之后，所有ZnO薄膜仍然有效。所获得的结果有望将掺杂的ZnO / PEI用作有才华的光催化剂，用于具有各种几何形状的大型表面，以进行有害污染物的光降解。

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