在可見光下使用ZnFe2O4/TiO2-GAC光催化降解酚之實驗參數研究

Experimental Parameters of Phenol Photodegradation by ZnFe2O4/TiO2-GAC Photocatalyst under Visible Light Irradiation

陳柏村(Bo-Cun Chen)

指導教授 ： 王榮基

大同大學/工程學院/化學工程學系所/碩士(2012年)

摘要

本研究是利用 Sol-Gel 法製備ZnFe2O4/TiO2固定在粒狀活性碳表面上，形成之ZnFe2O4/TiO2-GAC光觸媒，藉由XRD、SEM/EDS、BET、UV/Visible absorption spectra測量其特性。
ZnFe2O4/TiO2-GAC光觸媒對於酚溶液之平衡吸附，以Langmuir isotherm 與平衡實驗數據比較求得平衡吸附常數。
光催化反應是以酚當有機污染物進行可見光光降解反應。探討不同的實驗參數如反應溫度、轉速、燈源強度和氯離子濃度，對於光觸媒降解酚的影響。
實驗結果顯示光降解反應溫度的影響，在35℃光降解效果最好。光照強度的增加會提高光降解效果。氯離子濃度越高光降解效果越差。

關鍵字

Langmuir等溫吸附 ； 酚光降解 ； ZnFe2O4/TiO2-GAC ； 可見光照射

並列摘要

The photocatalysts of ZnFe2O4/TiO2-GAC was synthesized by sol-gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV/visible absorption spectra and Brunauer-Emmett-Teller (BET).
The experimental study of equilibrium isotherm of ZnFe2O4/TiO2-GAC in phenol solution was investigated and fitted with Langmuir isotherm to obtain the equilibrium constants.
ZnFe2O4/TiO2-GAC photcocatalysts were used to photodegrade phenol under visible light irradiation at different experimental parameters such as stirring speed, reaction temperature, light intensity and chloride ion concentration.
The results show that the best reaction temperature in the phenol photodegradation is 35℃； low light intensity and high chloride ions concentration would decrease the rate of phenol photodegradation.

並列關鍵字

Visible light irradtion. ； Phenol photodegradation ； Langmuir isotherm adsorption ； ZnFe2O4/TiO2-GAC

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