Novel GaTaO4 phase for efficient photocatalytic degradation of organic dye under visible light irradiation: An x-ray spectroscopic investigation
學年 112
學期 1
出版（發表）日期 2023-08-23
作品名稱 Novel GaTaO4 phase for efficient photocatalytic degradation of organic dye under visible light irradiation: An x-ray spectroscopic investigation
作品名稱（其他語言）
著者 Pandian Mannu; Chen, Mei-yu; Yeh, Ping-hung
單位
出版者
著錄名稱、卷期、頁數 Chemosphere 340,　139834
摘要 The novel GdTaO4 phase exhibits good photocatalytic activity under visible light irradiation and holds great promise for the removal of organic dyes from industrial wastes. The GdTaO4 samples were synthesized using the hydrothermal and calcination process with different weight ratios of gadolinium nitrate hydrate (G) and tantalum pentachloride (T), and their structural studies confirmed the formation of the GdTaO4 (GT) phase. Among the samples, GT-4 (with a weight ratio of 4:1) exhibited the highest photocatalytic activity for the degradation of Methyl Orange (MO) dye under visible light irradiation. To enhance the photocatalytic performance, H2O2 was used as a green additive, and the photocatalytic abilities were examined by varying dye types and concentrations. X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) revealed the local atomic and electronic structures around Ta and Gd and highlighted the contribution of Gd3+ to the GT system, which is a crucial factor in supporting the enhanced photocatalytic performance. Moreover, in-situ XAS at Gd M5-edge and O K-edge were examined under illumination/dark conditions to explore the electronic structures of photo-excited electron transition in the photocatalytic process. The analytical results provided strong evidence correlating the electronic structure and photocatalytic property of the GT. This study demonstrates that GdTaO4 exhibits good photocatalytic activity under visible light irradiation, making it a promising new Ta-based photocatalyst for the effective removal of organic dyes from industrial wastes.
關鍵字 Photocatalyst;GdTaO4;Photocatalytic degradation;Methyl orange (MO);X-ray absorption spectroscopy (XAS);X-ray photoelectron spectroscopy (XPS)
語言 zh_TW
ISSN 1879-1298
期刊性質 國內
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/125888 )