本文選題：Ti/IrO_2-RuO_2電極 + Ti/Ta_2O_5-Pt電極��； 參考：《西南科技大學(xué)》2017年碩士論文

【摘要】：隨著現(xiàn)代工業(yè)和經(jīng)濟(jì)的發(fā)展,多種高毒性、高色度、難降解的苯系廢水給人類賴以生存的環(huán)境造成了嚴(yán)重的威脅,苯系染料廢水的處理和無(wú)污染排放已經(jīng)成為倍受人們關(guān)注的問題。近年來(lái),電化學(xué)氧化法廣泛的環(huán)境兼容性和獨(dú)特的強(qiáng)氧化能力,使其引起了人們的關(guān)注。電化學(xué)氧化技術(shù)中,陽(yáng)極材料是影響廢水處理效率的關(guān)鍵因素。本論文采用熱分解法制備了 Ti/IrO2-RuO2和Ti/Ta2O5-Pt電極,并將其應(yīng)用于燦爛甲酚藍(lán)(BCB)、苯酚紅(PR)及孔雀石綠(MG)廢水的電催化降解。主要內(nèi)容如下:(1)以IrC13·3H20和RuC13·3H2O為原料,采用熱分解法成功制得Ti/IrO2-RuO2電極。通過(guò)掃描電子顯微鏡(SEM)、能譜(EDS)和X射線衍射(XRD)表征了 Ti/IrO2-RuO2電極的形貌、元素組成和結(jié)構(gòu)。線性掃描伏安法測(cè)試(LSV)表明,隨著電位的增大,自制Ti/IrO2-RuO2電極在1.24 V(vs.SCE)附近發(fā)生明顯的析氧反應(yīng)。用自制Ti/IrO2-RuO2電極電催化氧化降解100 mg.L-1的BCB廢水(初始化學(xué)需氧量CODCr,0 = 558.76 mg.L-1),研究了電解時(shí)間、電解電壓、電解質(zhì)濃度、電極間距和反應(yīng)溫度對(duì)BCB降解效率的影響。結(jié)果表明,在電解電壓為3.0 V、電解質(zhì)Na2SO4的濃度為6.0 g·L-1、電極間距為3 cm、反應(yīng)溫度為50 ℃、電解120 min時(shí),BCB廢水的COD去除率為78.4%,BCB降解率為77.1%,說(shuō)明Ti/IrO2-RuO2電極對(duì)噻吩嗪類苯系染料廢水表現(xiàn)出良好的催化活性和較高的降解效率。(2)PR是一種色度高、毒性大的苯系染料,PR廢水性質(zhì)穩(wěn)定,難降解。采用自制Ti/IrO2-RuO2電極電催化氧化降解100 mg·L-1的PR廢水(初始化學(xué)吸氧量CODCr,0=385.97mg·L-1),考察了電解時(shí)間、電流密度、電解質(zhì)濃度、廢水初始pH以及反應(yīng)溫度對(duì)PR降解效率的影響。結(jié)果表明,在電流密度為15 mA·cm-2、電解質(zhì)Na22SO4的濃度為6.0g·L-1、廢水溶液起始pH=7、反應(yīng)溫度為40 ℃、電解120min時(shí),Ti/IrO2-RuO2電極對(duì)PR廢水具有較高的電催化降解活性,PR廢水的COD去除率為75.4%,PR降解率為74.5%。(3)以TaCl5和H2PtCl6為原料,采用熱分解法成功制得Ti/Ta2O5-Pt電極。通過(guò)掃描SEM、EDS和XRD表征了Ti/Ta2O5-Pt電極的形貌、元素組成和結(jié)構(gòu)。結(jié)果表明,Ti/Ta2O5-Pt電極與Ti/IrO2-RuO2電極有相似的表面形貌。LSV測(cè)試表明,自制Ti/Ta2O5-Pt電極的析氧電位在1.18V(vs.SCE)左右。用自制Ti/Ta2O5-Pt電極電催化氧化降解30 mg.L-1的MG廢水(初始化學(xué)需氧量CODCr,0=A85.85mg·L-1),研究了廢水初始pH、電解質(zhì)濃度、電流密度和反應(yīng)溫度對(duì)MG降解效率的影響。結(jié)果表明,在廢水初始pH = 4、電解質(zhì)Na2SO4的濃度為6.0g·L-1、電流密度為15mA·cm-2、反應(yīng)溫度為30℃、電解120 min時(shí),MG廢水的降解率為82.2%,COD去除率為80.5%,說(shuō)明Ti/Ta2O5-Pt電極對(duì)三苯甲烷類苯系染料廢水表現(xiàn)出良好的催化活性和較高的降解效率。研究結(jié)果表明,自制Ti/IrO2-RuO2和Ti/Ta2O5-Pt電極在電催化氧化處理噻吩嗪類、苯酚紅、三苯基甲烷類等苯系染料廢水領(lǐng)域具有一定的應(yīng)用前景。
[Abstract]:With the development of modern industry and economy, many kinds of highly toxic, high-chromatic and refractory benzene-series wastewater pose a serious threat to the environment on which human beings depend for survival. The treatment and non-pollution discharge of benzene dye wastewater have been paid more and more attention. In recent years, electrochemical oxidation has attracted much attention due to its extensive environmental compatibility and unique strong oxidation ability. In electrochemical oxidation technology, anode material is the key factor affecting wastewater treatment efficiency. In this paper, Ti/IrO2-RuO2 and Ti/Ta2O5-Pt electrodes were prepared by thermal decomposition method and were applied to the electrocatalytic degradation of brilliant cresol blue (BCB) and malachite green (M G) wastewater. The main contents are as follows: (1) IrC13 3H20 and RuC13 3H2O are used as raw materials to prepare Ti/IrO2-RuO2 electrode successfully by thermal decomposition. The morphology, elemental composition and structure of Ti/IrO2-RuO2 electrode were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Linear scanning voltammetry (LV) showed that the oxygen evolution reaction of self-made Ti/IrO2-RuO2 electrode was obvious near 1.24V vs.SCE with the increase of potential. The effects of electrolysis time, electrolytic voltage, electrolyte concentration, electrode spacing and reaction temperature on the degradation efficiency of 100 mg.L-1 BCB wastewater (initial COD ~ (2 +) = 558.76 mg 路L ~ (-1) were studied by electrocatalytic oxidation with self-made Ti/IrO2-RuO2 electrode. The results show that the electrolysis voltage is 3.0 V, the concentration of electrolyte Na2SO4 is 6.0 g / L ~ (-1), the electrode spacing is 3 cm, and the reaction temperature is 50 鈩，

本文編號(hào)：1852847