本文選題：復(fù)合光催化材料 + 可見光活性��； 參考：《河南工業(yè)大學(xué)》2015年碩士論文

【摘要】：納米TiO2是一種新型的無機功能材料,由于其粒徑在1nm~100 nm范圍之間,具有粒徑小、比表面積大、表面活性高、分散性好等特點,因此表現(xiàn)出了獨特的物理化學(xué)性質(zhì),使其在化工、環(huán)境、能源、衛(wèi)生領(lǐng)域有著廣闊的應(yīng)用前景。納米二氧化鈦(TiO2)光催化技術(shù)是一種新型污染治理技術(shù),尤其在水處理和空氣凈化方面,由于其成本低、安全無毒、穩(wěn)定性好且易回收等性質(zhì)越來越受到國內(nèi)外科研工作者的關(guān)注。另外,TiO2還能起到滅菌、除臭、防污、自潔的作用,可以將微生物、細菌等分解成CO2和H2O。本文自制改性的納米二氧化鈦粉體,并對其進行XRD、EDS、TEM、UV-Vis結(jié)構(gòu)表征。以規(guī)則的粘土陶粒為載體,高鋁酸鹽為粘結(jié)劑根據(jù)一定比列制備出了可見光活性納米二氧化鈦光催化材料,并對材料表面進行了TEM表征。并以甲基橙模擬污染物做了復(fù)合材料的光催化性能研究,同時對景觀水和家庭養(yǎng)魚廢水樣進行了光催化試驗。實驗研究成果如下:(1)制備的二氧化鈦顆粒結(jié)構(gòu)表征表明成功進行了C、N、S元素摻雜,且呈現(xiàn)出規(guī)則的棒狀結(jié)構(gòu),具有良好的分散性。復(fù)合光催化材料TEM顯示二氧化鈦顆粒之間交叉連接,裸露在高鋁酸鹽水泥外部,表面未被覆蓋,能夠呈現(xiàn)出較好的光催化活性。(2)以5mg/L的甲基橙為模擬污染物,自制的二氧化鈦粉末在成膜前后均具有較好的可見光光催化活性,分別為98.6%,94.5%。同時,復(fù)合光催化球形材料表現(xiàn)出了較好的抗菌性能,對于水體的污染防治具有一定的作用。(3)高鋁酸鹽水泥熟料和自制的二氧化鈦按一定比例混合制備的光催化材料在弱酸性條件下具有很好的光催化活性,尤其是對低濃度甲基橙具有較高的光催化降解效果,在5mg/L甲基橙溶液中光催化降解率達到了98.4%,對于30mg/L的甲基橙也有79%的降解率。同時光催化材料擁有較強的連續(xù)水處理能力,在進行了六次循環(huán)使用后仍然達到了89%的光催化降解甲基橙能力。(4)制備的光催化復(fù)合材料在室外太陽光的照射下,經(jīng)過12d的光催化,初始COD值為90mg/L的景觀水降解率達到了87.4%。初始COD值為171mg/L的魚缸廢水光催化降解率同樣達到了74%的COD去除率。
[Abstract]:Nano-sized TiO2 is a new inorganic functional material. Because of its small particle size, large specific surface area, high surface activity and good dispersity, its particle size is in the range of 1nm~100 nm, so it has a unique physical and chemical property, which makes it in chemical industry. The fields of environment, energy and sanitation have broad application prospects. Nanometer Titanium dioxide (TIO _ 2) photocatalytic technology is a new pollution control technology, especially in water treatment and air purification, because of its low cost, safety and non-toxic, More and more researchers at home and abroad pay more and more attention to the properties of stability and easy recovery. In addition, it can also play the role of sterilization, deodorization, anti-fouling, self-cleaning, can decompose microbes and bacteria into CO2 and H _ 2O. In this paper, the modified nano-TiO _ 2 powder was prepared and its structure was characterized by XRDX EDSI Tem UV-Vis. The visible photoactive nano-TiO _ 2 photocatalytic material was prepared by using regular clay ceramsite as carrier and high-aluminate as binder. The surface of the material was characterized by TEM. The photocatalytic properties of the composite materials were studied by using methyl orange as a simulated pollutant, and the photocatalytic experiments were carried out on the landscape water and the domestic fish culture wastewater samples at the same time. The experimental results are as follows: (1) the structure characterization of TIO _ 2 particles prepared shows that the doped elements of C _ (N) N _ (1) have been successfully doped, with regular rod-like structure and good dispersity. The composite photocatalytic material (TEM) showed that titanium dioxide particles were interlinked and exposed to the exterior of high aluminate cement, and the surface was not covered. The composite photocatalytic material showed good photocatalytic activity. (2) the methyl orange of 5mg/L was used as the simulated pollutant. The titanium dioxide powder prepared by ourselves has good visible photocatalytic activity before and after film formation, which is 98.6% and 94.5% respectively. At the same time, the composite photocatalytic spherical materials showed good antibacterial properties. High aluminate cement clinker and self-made titanium dioxide mixed in a certain proportion have good photocatalytic activity under weak acid condition. Especially for low concentration methyl orange, the photocatalytic degradation rate reached 98.4% in 5mg/L methyl orange solution, and 79% for 30mg/L methyl orange. At the same time, the photocatalytic material has strong continuous water treatment ability. After six cycles, the photocatalytic composite material can still reach 89% photocatalytic degradation ability of methyl orange. After 12 days of photocatalysis, the degradation rate of landscape water with initial COD value of 90mg/L reached 87.4%. The photocatalytic degradation rate of fish tank wastewater with initial COD value of 171mg/L was also 74%.
【學(xué)位授予單位】：河南工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ134.11;TB383.1

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本文編號：1831281