Preparation of ternary Pt-NiO-ZnO hybrids and investigation of its photocatalytic performance toward methyl orange
Preparation of ternary Pt-NiO-ZnO hybrids and investigation of its photocatalytic performance toward methyl orange
复制标题
Pt-NiO-ZnO三元杂化物的制备及其对甲基橙的光催化性能研究
DOI：
10.1007/s10854-019-00814-2
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Wu Hongjing
中科院分区：
文献类型：
--
作者：
Zhang Limin;Qin Ming;Yu Yinkai;Zhang Mingkuan;Zhao Xinran;Qian Jin;Wu Hongjing
氧化锌作为一种光催化剂因其来源丰富和无毒而受到广泛关注。然而，e−/h+对的快速复合严重阻碍了ZnO光催化剂的实际应用。贵金属Pt的掺入和NiO-ZnO异质结构的形成已被证明是提高ZnO光催化性能的有效途径。然而，Pt-NiO-ZnO三元杂化物的光催化行为尚未得到研究。在本文中，我们成功地制备了Pt掺杂ZnO和NiO-ZnO异质结构。系统地研究了所制备的复合材料的光催化性能。在Ni/Zn = 2:10的优化条件下，制备了NiO-ZnO - Pt三元杂化物，其中添加1% Pt的NiO-ZnO对甲基橙的降解率最高。近95%的甲基橙可在90分钟内降解。提出了Pt-NiO-ZnO三元杂化物降解MO的光催化反应机理。Pt-NiO-ZnO复合材料不仅可以作为高性能光催化剂，还可以应用于传感器、制氢和环境污染处理等领域。
ZnO has received much attention as a photocatalyst due to its abundant source and nontoxic nature. However, the rapid recombination of e−/h+pairs gravely hinders the practical application of ZnO photocatalyst. Incorporation of noble metal Pt and the formation of NiO–ZnO heterostructures have been proved effective way to improve the photocatalytic performance of ZnO. However, photocatalytic behavior of ternary Pt–NiO–ZnO hybrids has not been studied yet. In this paper, we successfully prepared Pt doped ZnO as well as NiO–ZnO heterostructures. The photocatalytic performance of the as-prepared composites has been systematically investigated. Under the optimized ratio of Ni/Zn = 2:10, NiO–ZnO–Pt ternary hybrids were fabricated and NiO–ZnO with 1% of Pt incorporated revealed the highest degradation rate toward methyl orange. Nearly 95% of methyl orange can be degraded within 90 min. The photocatalytic reaction mechanism of the MO degradation by ternary Pt–NiO–ZnO hybrids has also been proposed. The Pt–NiO–ZnO composite not only can serve as a high-performance photocatalyst, but also can be applied in the fields of sensors, hydrogen generation and environmental pollution treatment, etc.