Heavy metal ion removal from water by photocatalysis of lanthanide metal oxides

2014 Fiscal Year Final Research Report

• Project/Area Number: 25550052
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental engineering and reduction of environmental burden
• Research Institution: Nagaoka University of Technology
• Principal Investigator: SATO Kazunori 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (20143828)
• Co-Investigator(Renkei-kenkyūsha): TEOH Wahtzu 長岡技術科学大学, 工学部, 助教 (10452088) ; JIRACHAYA Ayawanna 長岡技術科学大学, 博士研究員
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 光電析 / ランタノイド / 有害重金属 / 水溶液

Outline of Final Research Achievements

The photoelectrodeposition effect of lanthanide oxides (Ln2O3-CeO2(Ln = La, Sm, Gd)) on the removal of heavy metal ions dissolved in water has been investigated. These materials showed a high photoelectrodeposition ability for lead, cadmium, and copper ions under the photo irradiation. The present result indicates that the coexistence of CeO2 particles and Ln2O3 particles（or the CeO2 and (CeO2)1-X(Ln2O3)X phases）contributes to an efficient separation of holes and electrons generated by the photo irradiation. A possible mechanism for the efficient removal of hazardous heavy metal ions dissolved in an aqueous environment has been proposed.

Free Research Field

材料工学