本文選題：Ti/Ru-Ir-Sn氧化物陽極 + 碳納米管��； 參考：《青島科技大學(xué)》2015年碩士論文

【摘要】：鈦基金屬氧化物陽極是指在以鈦為陽極的基體表面上涂覆金屬氧化物的電極,具有電催化活性高、穩(wěn)定性好等優(yōu)點。在電解海水防污工程中,普通陽極的析氯活性偏低、使用壽命較短,易導(dǎo)致系統(tǒng)停機等問題,不能滿足實際工程中免維護的要求。碳納米管(CNTs)作為一維納米材料,具有良好的導(dǎo)電性、電子傳遞速率,比表面積較大,相對于其它納米材料,成本較低,廣泛地應(yīng)用在電極修飾、復(fù)合材料等材料科學(xué)領(lǐng)域。因此,本研究目的是通過摻雜碳納米管制備鈦基金屬氧化物陽極,改善陽極在海水電解過程中的析氯活性和穩(wěn)定性。本文采用熱分解法制備含碳納米管T i/Ru-Ir-Sn氧化物陽極,并通過場發(fā)射掃描電子顯微鏡(FESEM)及能譜儀(EDS)、X射線衍射儀(XRD)研究了涂層的微觀形貌、成分和物相；采用極化曲線、循環(huán)伏安測試、電化學(xué)阻抗譜及強化電解壽命試驗等方法研究在海水析氯反應(yīng)條件下工作的釕系氧化物陽極的析氯電催化活性和耐用性,取得了以下具有實用價值的成果：1)對試驗用碳納米管進行熱分析。結(jié)果表明：在試驗燒結(jié)溫度470℃條件下,碳納米管未發(fā)生高溫氧化分解,仍以單質(zhì)形式存在于陽極涂層中。2)研究了碳納米管摻雜量對陽極微觀結(jié)構(gòu)的影響。結(jié)果表明：不同碳納米管摻雜量的Ti/Ru-Ir-Sn氧化物陽極,表面均呈現(xiàn)典型的“龜裂狀”形貌；摻雜的碳納米管提高了涂層的活性成分含量,但沒有改變(Ru,Ir,Sn)O2固溶體的結(jié)構(gòu)。3)添加碳納米管可顯著改善Ti/Ru-Ir-Sn氧化物陽極的電化學(xué)性能。研究表明：陽極活性表面積增大4倍,提高了其析氯電催化活性；強化電解壽命延長3倍,陽極的穩(wěn)定性得到提高。其中摻雜0.1g·L-1碳納米管的Ti/Ru-Ir-S n氧化物陽極具有最優(yōu)的陽極電催化活性和穩(wěn)定性。4)考察了超聲處理、酸化處理等碳納米管分散工藝對Ti/Ru-Ir-Sn氧化物陽極電化學(xué)性能的影響。研究表明：與單一超聲分散工藝相比,采用超聲+酸化復(fù)合分散工藝使碳納米管分散更加均勻,制備的Ti/Ru-Ir-Sn氧化物陽極涂層具有更小的容抗弧半徑,內(nèi)電阻減小,單位時間內(nèi)電子交換量最大,陽極壽命得到進一步延長。
[Abstract]:Titanium based metal oxide anode is a kind of electrode coated with metal oxide on the substrate with titanium as anode, which has the advantages of high electrocatalytic activity and good stability. In the electrolytic seawater antifouling project, the chlorination activity of the common anode is low, the service life is short, and the system is easy to be shut down, which can not meet the requirement of no maintenance in the actual engineering. Carbon nanotubes (CNTs), as one-dimensional nanomaterials, have good electrical conductivity, electron transfer rate, large specific surface area, low cost compared with other nanomaterials, and are widely used in materials science fields such as electrode modification, composite materials and so on. Therefore, the purpose of this study is to improve the chlorination activity and stability of titanium based metal oxide anode by doping carbon nanotubes. In this paper, carbon nanotube T i/Ru-Ir-Sn oxide anode was prepared by thermal decomposition method. The microstructure, composition and phase of the coating were studied by field emission scanning electron microscopy (FESEM) and energy spectrometer (EDS-X ray diffractometer). Cyclic voltammetry, electrochemical impedance spectroscopy and enhanced electrolytic life test were used to study the electrocatalytic activity and durability of ruthenium oxide anode working in seawater chlorination reaction. The following practical results were obtained: 1) Thermal analysis of carbon nanotubes was carried out. The results show that at the sintering temperature of 470 鈩，

本文編號：1874823