State Key Laboratory of Cultivation Base for Photoelectric Technology and Functional Materials, Laboratory of Optoelectronic Technology of Shaanxi Province, National Center for International Research of Photoelectric Technology & Nano-Functional Materials and Application, Institute of Photonics and Photon-Technology, Northwest University, Xi'an, 710069, China.
Environ Sci Pollut Res Int. 2020 Nov;27(33):41503-41514. doi: 10.1007/s11356-020-10131-5. Epub 2020 Jul 20.
Dye wastewater has been becoming the focus of environmental protection and scientific research because of its serious harm to the environment and living organisms. A supported nano-porous anode alumina-NiO (nano-PAA-NiO) photocatalyst was prepared by calcining nano-PAA-NiCl composite which was grown with a self-organization method. Its morphology and composition were investigated by means of SEM, EDS, and XRD. The specific surface area of nano-PAA-NiO was characterized with the N adsorption and desorption isotherms. The band gap was calculated to be 3.0 eV with the UV-Vis absorption spectra. The species and optical properties of nano-PAA-NiO were investigated by FT-IR spectra and photoluminescence spectra. With the nano-PAA-NiO photocatalyst, the degradation rates of methyl orange (MO) were 94.3% under the optimum conditions, and it could reach 82% when the catalyst was reused for the third time. In addition, the photocatalytic mechanism was proposed, and the reactions followed the Langmuir-Hinshelwood model. The nano-PAA-NiO composite has an excellent effect for organic dye wastewater treatment and practical prospects in environmental protection.
染料废水因其对环境和生物的严重危害而成为环境保护和科学研究的焦点。通过煅烧自组装生长的纳米复合 NiCl 的方法制备了负载型纳米多孔阳极氧化铝-氧化镍（nano-PAA-NiO）光催化剂。采用 SEM、EDS 和 XRD 对其形貌和组成进行了研究。通过 N 吸附和脱附等温线对纳米 PAA-NiO 的比表面积进行了表征。用紫外可见吸收光谱计算得到其带隙为 3.0 eV。采用傅里叶变换红外光谱和光致发光光谱对纳米 PAA-NiO 的物种和光学性质进行了研究。在最佳条件下，纳米 PAA-NiO 光催化剂对甲基橙（MO）的降解率达到 94.3%，催化剂重复使用三次时，降解率仍可达 82%。此外，还提出了光催化机理，反应遵循 Langmuir-Hinshelwood 模型。纳米 PAA-NiO 复合材料对有机染料废水处理具有优异的效果，在环境保护方面具有广阔的应用前景。
