摘要：多相光助一芬頓技術(shù)是目前最具應(yīng)用潛力的高級氧化技術(shù)之一。開發(fā)新型多相催化劑、拓寬pH適用范圍、提高催化降解效率、降低成本是多相光助芬頓技術(shù)工程化應(yīng)用必須解決的關(guān)鍵問題。該技術(shù)的核心是選擇合適的載體以合成高效、穩(wěn)定、廉價的多相催化劑。膨潤土由于比表面積大、吸附能力強(qiáng)、價格低廉等優(yōu)點(diǎn)成為其理想的催化劑載體。本實(shí)驗以偶氮染料橙II(Orange II)為例，研究由羥基鐵柱撐膨潤土和十六烷基三甲基溴化胺（CTMAB）焙燒制得的碳摻三氧化二鐵催化劑在光照條件下對于染料的脫色和礦化效果。了解光照條件下鐵離子的光解作用和過氧化氫受光照的分解作用，結(jié)合芬頓試劑降解有機(jī)物機(jī)理來研究碳改性氧化鐵在可見光作用下的協(xié)同催化能力。再從pH值、反應(yīng)溫度、光的強(qiáng)度和光的波長來研究反應(yīng)過程中的影響因素。結(jié)果表明：碳摻雜三氧化二鐵催化劑芬頓反應(yīng)在可見光的作用下，降解效率有顯著提高。pH值、反應(yīng)溫度、光的強(qiáng)度和光的波長對其都有一定的影響。

關(guān)鍵詞：光助芬頓反應(yīng)，鐵柱撐膨潤土，催化降解，染料

Abstract：Heterogeneous photo-Fenton process is one of the most promising technologies for organic wastewater treatment. At present, a key problem of this technology development and its industrial application is to develope ideal catalyst, extend the range of pH values for Fenton-type oxidation, increase the catalytic activity of heterogeneous catalyst and lower the cost of treatment. The core of the technology is to select a suitable carrier for synthetise efficient, stable and inexpensive heterogeneous catalysts. Bentonite come to be the ideal catalyst support due to the large surface area, high adsorption capacity and low cost. In this experiment, we use the azo dye Orange II as an example to study carbon-doped iron oxide catalyst made by hydroxyl-iron posts bentonite and CTMAB roast in the condition of vacuum degradation in the no-light conditions and UV irradiation. Learn the photolysis of the iron ions and the decomposition of the hydrogen peroxide in the light, combined with Fenton's reagent degradation of the organic mechanism to study the synergistic catalytic ability of the carbon-modified iron oxide under the visible light. Then, study the factors that affecting the reaction process from the PH, reaction temperature, the wavelength and the intensity of the light. The results showed that: the degradation efficiency of the carbon-doped iron oxide catalyst for Fenton reaction under the visible light has significantly improved. The PH, reaction temperature, the wavelength and the intensity of the light all have a certain impact to the reaction.

Keywords: photo-Fenton process; Fe-pillared bentonite; catalytic degradation; dye