本文選題：Mo-Cu-Fe-O催化劑 + 常溫常壓　； 參考：《催化學(xué)報(bào)》2017年10期

【摘要】：染料廣泛應(yīng)用于紡織廠、皮革廠以及染發(fā)等各個(gè)領(lǐng)域.染料廢水具有成分復(fù)雜、濃度高、色度大和生物難降解等特性,因此傳統(tǒng)的處理方法難以將其完全降解.高級(jí)氧化技術(shù)已成為國內(nèi)外廣泛應(yīng)用的染料廢水處理技術(shù)之一,特別是濕式催化氧化(CWAO)技術(shù).然而,CWAO工藝中反應(yīng)往往需要高溫(通常為200-280°C)和高壓(通常為2-9 MPa),制約了其廣泛應(yīng)用.因此,人們致力于研發(fā)具有高催化活性的催化劑,通過改變反應(yīng)歷程和降低反應(yīng)的活化能,使反應(yīng)在常溫常壓條件下進(jìn)行.本課題組曾采用鉬酸鹽浸漬于Zn/Al LDHs溶液中成功制備了Mo/Zn-Al LDHs催化劑,該催化劑能在常溫常壓下濕式催化氧化降解陽離子紅GTL有機(jī)廢水.Mo/Zn-Al LDHs催化劑中Mo作為主催化成分,Zn-Al LDHs作為載體.Cu-Fe LDHs本身作為一種催化劑,與Mo相結(jié)合能有效提高催化劑的活性及穩(wěn)定性,因此本文采用浸漬法制備了Mo-Cu-Fe-O新型復(fù)合催化材料,采用X射線衍射、氫氣程序升溫還原、循環(huán)伏安法和氧氣程序升溫脫附等表征手段研究了Mo-Cu-Fe-O材料的結(jié)構(gòu)及氧化還原特性.以陽離子紅GTL、結(jié)晶紫和酸性紅為染料廢水代表,研究了常溫常壓下Mo-Cu-Fe-O催化降解染料廢水的催化活性.結(jié)果表明,在中性條件下Mo-Cu-Fe-O對陽離子型染料廢水具有良好的催化活性.循環(huán)使用七次后該樣品對陽離子紅GTL和酸性紅的脫色率分別達(dá)到91.5%和92.8%,然而對酸性紅陰離子型染料廢水基本無催化活性.在常溫常壓CWAO過程中產(chǎn)生的羥基自由基能有效降解陽離子GTL廢水,其廢水毒性隨著反應(yīng)的進(jìn)行逐漸減小.
[Abstract]:Dyes are widely used in textile mills, leather factories and hair dyeing and other fields. Dye wastewater has the characteristics of complex composition, high concentration, high chromaticity and biodegradability, so it is difficult to be completely degraded by traditional treatment methods. Advanced oxidation technology has become one of the widely used dye wastewater treatment technologies at home and abroad, especially the wet catalytic oxidation (CWAO) technology. However, high temperature (usually 200-280 擄C) and high pressure (usually 2-9 MPA) are required for reaction in CWAO process, which restricts its wide application. Therefore, people devote themselves to the research and development of catalysts with high catalytic activity. By changing the reaction process and reducing the activation energy of the reaction, the reaction can be carried out at room temperature and atmospheric pressure. Our group successfully prepared Mo/Zn-Al LDHs catalyst by impregnating molybdate in Zn/Al LDHs solution. The catalyst can degrade the organic wastewater of cationic red GTL by wet catalytic oxidation at room temperature and atmospheric pressure. Mo / Zn-Al LDHs catalyst can be used as the main component of the catalyst. Cu-Fe LDHs itself is used as a catalyst for the degradation of cationic red GTL organic wastewater. The combination of Mo and Mo can effectively improve the activity and stability of the catalyst. In this paper, a new type of Mo-Cu-Fe-O composite catalyst material was prepared by impregnation method. X-ray diffraction (XRD) and hydrogen temperature programmed reduction were used. The structure and redox properties of Mo-Cu-Fe-O were investigated by cyclic voltammetry and oxygen temperature programmed desorption. Using cationic red GTL, crystal violet and acid red as the representative of dye wastewater, the catalytic activity of Mo-Cu-Fe-O in the degradation of dye wastewater at room temperature and atmospheric pressure was studied. The results show that Mo-Cu-Fe-O has good catalytic activity for cationic dye wastewater under neutral conditions. The decolorization rates of cationic red GTL and acid red were 91.5% and 92.8% respectively after seven cycles of recycling, but they had little catalytic activity for acid red anion dye wastewater. The hydroxyl radical produced in the process of CWAO at room temperature and atmospheric pressure can effectively degrade the cationic GTL wastewater, and the toxicity of the wastewater decreases gradually with the reaction.
【作者單位】： 湘潭大學(xué)環(huán)境與資源學(xué)院環(huán)境科學(xué)與工程系;
【基金】：supported by the National Natural Science Foundation of China(51678511,51308484) the Natural Science Foundation of Hunan Province(13JJ4049) the Education Department Fund of Hunan Province(14C1094) the Open Fund of Key Laboratory of Mineralogy and Metallogeny in Chinese Academy of Sciences(KLMM20150104) the Major Talent Training Program of Xiangtan University(16PYZ09);the Specialized Research Fund for the Doctoral Program of Xiangtan University(12QDZ18)~~
【分類號(hào)】：O643.36;X703

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