Adsorption-photodegradation synergetic removal of methylene blue from aqueous solution by NiO/graphene oxide nanocomposite

作者：Rong, Xinshan; Qiu, Fengxian^*; Zhang, Chen; Fu, Liang; Wang, Yuanyuan; Yang, Dongya

来源：Powder Technology, 2015, 275: 322-328.

DOI：10.1016/j.powtec.2015.01.079

• Adsorption
• Photodegradation
• Nanocomposite
• Removal efficiency

Nickel oxide/graphene oxide (NiO/GO) nanocomposite was prepared by a hydrothermal method combining a subsequent calcination process. X-ray diffraction (XRD), Raman spectrometer (Raman), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS) methods were used for the characterization of nanocomposite. Removal of aromatic heterocyclic dye methylene blue (MB) from aqueous solution using adsorption and photodegradation activity of NiO/GO nanocomposite was investigated. The effects of NiO/GO nanocomposite dose, pH, and contact time on the removal efficiency of MB were also investigated. Compared with that in the dark, NiO/GO nanocomposite shows a faster and higher removal efficiency by the photodegradation and adsorption under visible light irradiation. A remarkable removal efficiency of MB achieved 97.54% by NiO/GO nanocomposite after 2 h. It could be concluded that synergy of photodegradation and adsorption has a significant progress for removal of MB under visible light compared with that of only adsorption without light.

• 出版日期2015-5
• 单位江苏大学