Adsorption and subsequent partial photodegradation of methyl violet 2B on Cu/Al layered double hydroxides

作者：Guzman Vargas Ariel; Lima Enrique; Uriostegui Ortega Gisselle A; Oliver Tolentino Miguel A; Rodriguez Esau E

来源：Applied Surface Science, 2016, 363: 372-380.

DOI：10.1016/j.apsusc.2015.12.050

• Cu/Al materials
• Adsorption models
• Photodegradation
• characterization
• MV dye
• Kinetic

Uncalcined Cu/Al LDH was studied as adsorbent and photocatalyst in the adsorption and subsequent photodegradation of methyl violet 2B dye (MV2B). Physicochemical characterization was carried out by XRD, FTIR, UV-vis, including photoactive properties, DSC/TGA and SEM. Kinetic and thermodynamic models showed great affinity and sorption capacity, the maximum adsorption capacity was 361.0 mg g(-1) obtained by Langmuir model, in addition, the results showed that the dye was adsorbed on the LDH surface. Photocatalytic activity was evaluated in the MV2B dye photodegradation process, and it was confirmed by the presence " OH radicals monitored by EPR spin trapping technique, additionally, COD and TOC parameters were measured, C-13 NMR showed differences for the adsorbed and photodegraded samples.

• 出版日期2016-2-15