rGO-Ag-Fe-doped TiO_2複合材料在可見光照射之光催化特性

Characteristics of Ag Loaded Fe-doped TiO_2 on rGO Composite under Visible Light Irradiation

梁晏馗(Yan-Kui Liang) ； 陳慶成(Ching-Cheng Chen) ； 傅彥培(Yen-Pei Fu)

《臺灣鑛業》 69卷4期 (2017/12) Pp. 9-21

摘要

在本研究中成功的製備rGO-Ag-Fe-doped TiO_2 複合材料，並將此光觸媒材料置於亞甲基藍（Methylene Blue, MB）溶液中，以在可見光照射下的降解能力來檢視其光催化特性。根據實驗結果，發現rGO-Ag-Fe-doped TiO_2 的光催化活性比rGO-Fe-doped TiO_2 以及Fe-doped TiO_2光觸媒都還要來得好。為了瞭解rGO-Ag-Fe-doped TiO_2 光催化劑的特性，我們利用X 光粉末繞射儀（X-ray Powder Diffractometer, XRD）、掃描式電子顯微鏡（Scanning Electron Microscopy, SEM）、X 射線光電子能譜儀（X-ray photoelectron spectroscopy, XPS）以及拉曼光譜儀（Raman Spectrometer）和光激發致螢光光譜儀（Photoluminescence, PL）分析樣品。根據光催化降解的結果，在使用色溫為6,000K 的35-W Xe 燈下照射150 分鐘，rGO-Ag-Fe-doped TiO_2 展現出優異的降解性質，亞甲基藍溶液的降解率為95.33%。在本研究中，並以不同種類的自由基（radical）清除劑（Scavenger）進行自由基誘捕實驗（Trapping Experiment），以解釋光催化活性的機制。

關鍵字

光催化劑 ； 染色降解 ； rGO-Ag-Fe-doped TiO_2複合材料

並列摘要

In this work, reduced graphene oxide (rGO) deposited on the surface of iron doped TiO_2 with 1 wt% of Ag nanoparticle has been examined as photocatalysts in photocatalytic degradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Ag loaded Fedoped TiO_2 on rGO (rGO-Ag-Fe-doped TiO_2) composite is higher than that of either the Fe-doped TiO_2 or Fe-doped TiO_2 on rGO. To understand these materials characterization, they were measured by X ray diffractometer (XRD) and scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectrometer and photoluminescence (PL) spectrometer. Based on photocatalytic degradation results, the rGO-Ag-Fe-doped TiO_2 composite demonstrated excellent degradation of MB with 95.33% for 150 min under 35-W Xe arc lamp irradiations with color temperature of 6,000 K. In this study, different kind of scavengers were used for trapping experiment to explain the mechanism of photocatalytic activity.

並列關鍵字

Photocatalysts ； Dye degradation ； rGO-Ag-Fe-doped TiO_2 composite