本文選題：大陽(yáng)能電池 + 水鈉錳礦��； 參考：《巖石礦物學(xué)雜志》2017年06期

【摘要】：電催化、光催化、光電催化等電化學(xué)技術(shù)以其高效、廉價(jià)、環(huán)保等特點(diǎn)被認(rèn)為是一種極具前途的環(huán)境污染深度凈化技術(shù),在有機(jī)廢水處理等方面得以廣泛應(yīng)用。本文借助電化學(xué)電量控制法制備了水鈉錳礦電極,通過(guò)X射線衍射(XRD)、掃描電鏡(SEM)表征其物相形貌,UV-Vis漫反射吸收譜結(jié)果表明水鈉錳礦對(duì)300~600 nm波長(zhǎng)范圍可見(jiàn)光表現(xiàn)出良好吸收能力,計(jì)算其直接帶隙約為2.14 e V,Mott-Schottky曲線計(jì)算其平帶電位約1.15 V,0.1 mol/L Na2SO4介質(zhì)中載流子濃度約為3.3×1019cm-3,是良好的可見(jiàn)光激發(fā)n型半導(dǎo)體材料。同時(shí),本文以廉價(jià)高效的太陽(yáng)能電池板取代了傳統(tǒng)電化學(xué)工作站等外加電場(chǎng)設(shè)備,成功實(shí)現(xiàn)了協(xié)同強(qiáng)化水鈉錳礦光電催化降解作用。協(xié)同作用下甲基橙60 min降解率為90.2%,效率遠(yuǎn)高于水鈉錳礦光催化(2.2%)與電極電催化(33.6%)作用,強(qiáng)化了水鈉錳礦光電催化降解反應(yīng),節(jié)省能耗的同時(shí)顯著提高了降解效率。批次循環(huán)降解實(shí)驗(yàn)表明第4輪降解率(86.8%)較之第1輪(90.3%)降低程度5%,表明其具有良好長(zhǎng)時(shí)間運(yùn)行穩(wěn)定性。
[Abstract]:Electrochemical techniques such as electrocatalysis and photocatalysis have been widely used in the treatment of organic wastewater because of their high efficiency, low cost and environmental protection. In this paper, sodium manganite electrode was prepared by the method of electrochemical electric quantity control. The phase morphology and UV-Vis diffuse reflectance absorption spectrum of the electrode were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that sodium manganese ore had a good absorption ability to the visible light in the wavelength range of 300 ~ 600 nm. The direct band gap is calculated to be about 2.14e V ~ (2 +) Mott-Schottky curve. Its flat band potential is about 1.15 V ~ (-1) V ~ (0.1) mol / L Na _ 2SO _ 4 medium, and the carrier concentration is about 3.3 脳 10 ~ (19) cm ~ (-3), which is a good visible light excited n-type semiconductor material. At the same time, the photocatalytic degradation of sodium manganite was successfully enhanced by replacing the external electric field equipment such as the traditional electrochemical workstation with a cheap and efficient solar panel. Under synergistic action, the degradation rate of methyl orange for 60 min was 90.2, and the efficiency was much higher than that of sodium manganite (2.2%) and electrode electrocatalysis (33.6%). The photocatalytic degradation of sodium manganite was enhanced, and the energy consumption was saved and the degradation efficiency was improved significantly. The degradation rate of the fourth round (86.8%) was 5% lower than that of the first round (90.3%), which indicated that the degradation rate of the fourth round was stable for a long time.
【作者單位】： 造山帶與地殼演化教育部重點(diǎn)實(shí)驗(yàn)室北京大學(xué)地球與空間科學(xué)學(xué)院礦物環(huán)境功能北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃“973計(jì)劃”(2014CB846001) 國(guó)家自然科學(xué)基金(41230103,41522201,41402032)~~
【分類號(hào)】：P579;X703

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本文編號(hào)：2067265