本文選題：鈦電極 + 雙離子束濺射法　； 參考：《上海大學(xué)》2015年碩士論文

【摘要】：電氧化技術(shù)因其處理效率高、應(yīng)用靈活、易于自動(dòng)化和環(huán)境友好等優(yōu)點(diǎn),成為廢水處理的研究熱點(diǎn)。為了制備性能良好、使用壽命長(zhǎng)和穩(wěn)定性好的電極,本文采用雙離子束濺射法、水熱法和熱分解法制備了鈦基氧化物電極,并對(duì)它們的降解性能、電極形貌、析氧電位、壽命和·OH產(chǎn)生能力進(jìn)行比較,探討了不同方法制備電極的優(yōu)缺點(diǎn),并對(duì)廢水處理性能進(jìn)行了研究。本文所得的主要結(jié)果和結(jié)論如下:1)采用雙離子束濺射法制備電極時(shí),電極降解性能隨濺射膜的厚度的增加而增強(qiáng)。當(dāng)濺射膜厚度為100 nm時(shí),電極降解性能最好,能耗最少,電氧化反應(yīng)40 min時(shí)對(duì)亞甲基藍(lán)的去除率為75.29%。2)采用水熱法制備電極時(shí),中間層Fe摻雜、活性層Cu-La摻雜可以提高電極性能。正交試驗(yàn)結(jié)果表明反應(yīng)溫度影響最大,其次為反應(yīng)時(shí)間和反應(yīng)次數(shù),最優(yōu)制備條件為160℃、48 h和反應(yīng)2次。電氧化反應(yīng)中,加入COD會(huì)對(duì)亞甲基藍(lán)的降解產(chǎn)生競(jìng)爭(zhēng)效應(yīng);加入叔丁醇可以顯著抑制亞甲基藍(lán)的降解,說明電氧化降解亞甲基藍(lán)的反應(yīng)遵循?OH氧化反應(yīng)機(jī)理。初始濃度為0~45 mg/L亞甲基藍(lán)的降解符合一級(jí)反應(yīng)動(dòng)力學(xué)過程。3)采用熱分解法制備電極時(shí),中間層Fe摻雜、活性層Cu-La摻雜效果最好,Fe、Cu和La最佳摻雜量分別為3%、2%和3%。對(duì)電氧化反應(yīng)的工藝參數(shù)進(jìn)行優(yōu)化,在電流密度為20 m A/cm2、支持電解質(zhì)濃度0.3 mol/L、初始p H值為5、板間距為1.0 cm時(shí),電極降解效果最好。4)雙離子束濺射法、水熱法和熱分解法制備的電極在電氧化反應(yīng)10 min時(shí)對(duì)50 mg/L亞甲基藍(lán)的去除率分別為19.21%、99.77%和76.48%,水熱法去除效果最快,其次為熱分解法,雙離子束濺射法最慢。電化學(xué)性能實(shí)驗(yàn)表明,熱分解法制備的電極表面活性位點(diǎn)多,析氧電位高,強(qiáng)化壽命長(zhǎng),?OH產(chǎn)生量多。其次為水熱法制備的電極,氧化性能較好,表明水熱法是一種可行的有效的電極制備方法。雙離子束濺射法制備的電極性能最弱,表明雙離子束濺射法不適合制備高氧化性的電極。5)綜合考慮降解性能、制作成本和工藝條件,熱分解法制備的電極適合作為優(yōu)選電極,進(jìn)行廢水處理。結(jié)果表明,放大效應(yīng)會(huì)在一定程度上減弱電氧化反應(yīng)的降解效果,但影響程度并不與放大倍數(shù)成正比。電極在動(dòng)態(tài)實(shí)驗(yàn)和連續(xù)實(shí)驗(yàn)中表現(xiàn)出良好的穩(wěn)定性,可以滿足長(zhǎng)時(shí)間高負(fù)荷的運(yùn)轉(zhuǎn)要求。串聯(lián)裝置可以有效提高降解效果,并聯(lián)電源可以顯著降低系統(tǒng)耗電量。初始p H對(duì)實(shí)際廢水處理影響較大。電氧化反應(yīng)可以有效去除實(shí)際廢水中的COD和氨氮等目標(biāo)污染物。電極具有優(yōu)秀的電氧化性能,可以滿足實(shí)際廢水處理要求。
[Abstract]:Because of its high efficiency, flexible application, easy automation and environmental friendliness, electrooxidation technology has become a research hotspot in wastewater treatment. In order to prepare titanium based oxide electrodes with good performance, long service life and good stability, titanium oxide electrodes were prepared by double ion beam sputtering, hydrothermal method and thermal decomposition method, and their degradation properties, electrode morphology and oxygen evolution potential were investigated. The advantages and disadvantages of different methods for preparing electrodes were discussed, and the treatment performance of wastewater was studied. The main results and conclusions obtained in this paper are as follows: (1) when the electrode is prepared by dual-ion beam sputtering, the degradation property of the electrode increases with the thickness of the sputtering film. When the thickness of the sputtering film is 100nm, the degradation performance of the electrode is the best and the energy consumption is the least. The removal rate of methylene blue is 75.29.2 when the electrode is prepared by hydrothermal method at 40 min of electrooxidation reaction. When the electrode is prepared by hydrothermal method, Fe doping in the intermediate layer and Cu-La doping in the active layer can improve the electrode performance. The results of orthogonal test showed that the reaction temperature was the most important, followed by reaction time and times, and the optimum preparation conditions were 160 鈩，

本文編號(hào)：1782862