Faculty of Engineering, Department of Mechanical Engineering, University of Tarapacá, Avda, General Velasquez, 1775 Arica, Chile.
Department of Sustainable Energy Management, Stella Maris College, Chennai 600086, Tamilnadu, India.
J Hazard Mater. 2021 Aug 15;416:125989. doi: 10.1016/j.jhazmat.2021.125989. Epub 2021 May 4.
Recent interest and responsibility to retain the water resources rose among people. Scientists have been engaged to develop the mechanism that involves the freely available sunlight - a sustainable resource - to remove the pollutants from water to make it again suitable for life. Ample research was reported in the removal of dye pollutants present in water. For this they have utilized p type and n type semiconductors or combination of both (p-n type) under the excitation of a wide range of electromagnetic band energy. Most of the interest lies in emerging out of the mechanism with hybrid semiconductors to remove the previously reported flaws. Toward this regard, this manuscript aims to develop unique material using the underlying p-n-p model for harnessing visible light in catalysis. Initially, p-n structure was developed with copper oxide (p-type) and zinc oxide (n-type), then polyaniline (p-type) conjugated at different concentrations (0.5 M, 0.7 M & 1.0 M), to yield p-n-p models, using precipitation followed by sonication techniques. Detailed physicochemical investigations were conducted on the resultant p-n-p material to elucidate its characteristics. Furthermore, the mechanism was advocated for the best photocatalytic activity under visible light excitation for the degradation of 4-chlorophenol and compared with the performance of a standard p-n (CuO/ZnO) combination.
近年来，人们对水资源的保护意识不断增强，科学家们一直在致力于开发一种利用自由可得的阳光（一种可持续资源）去除水中污染物的机制，使水再次适合生命存在。人们对去除水中存在的染料污染物进行了大量研究。为此，他们利用 p 型和 n 型半导体或两者的组合（p-n 型），在广泛的电磁能带能量激发下进行了研究。大多数研究兴趣在于利用混合半导体来消除以前报道的缺陷，从而提出新的机制。在这方面，本文旨在利用潜在的 p-n-p 模型开发独特的材料，以利用可见光进行催化。最初，采用沉淀后超声处理技术，用氧化铜（p 型）和氧化锌（n 型）制备 p-n 结构，然后在不同浓度（0.5 M、0.7 M 和 1.0 M）下将聚苯胺（p 型）接枝到 p-n 结构上，得到 p-n-p 模型。对所得的 p-n-p 材料进行了详细的物理化学研究，以阐明其特性。此外，还提出了在可见光激发下具有最佳光催化活性的机制，并与标准 p-n（CuO/ZnO）组合的性能进行了比较。
