本文選題：碳納米管　切入點(diǎn)：棉花纖維　出處：《安徽理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,隨著工業(yè)的快速發(fā)展,環(huán)境污染日趨嚴(yán)峻。為了降解水和大氣中的有機(jī)物,發(fā)展一種無污染的環(huán)境處理技術(shù),已經(jīng)成為現(xiàn)代社會(huì)的一項(xiàng)非常重要的任務(wù)。各類研究已證明半導(dǎo)體光催化技術(shù)能直接利用太陽光降解環(huán)境中的污染物。在此背景下,本論文針對(duì)碳納米管、碳纖維為代表的一維碳材料是目前研究最為廣泛的一類新型碳材料,且因其高比表面積與優(yōu)良的導(dǎo)電性能成為當(dāng)今納米材料研究領(lǐng)域的熱點(diǎn)之一。將碳納米管(CNTs)和脫脂棉花纖維(CFs)作為載體,采用低溫處理法及水熱法,制備了多種一維碳材料氧化物半導(dǎo)體復(fù)合體系,并對(duì)其光催化性能進(jìn)行檢測(cè)以及對(duì)其光催化機(jī)理做出合理解釋。主要展開以下幾方面研究： 1.采用水熱法及低溫法,選取CNTs作為載體,以K2TiO(C2O4)2為鈦源,在CNTs上成功負(fù)載了均勻的TiO2。綜合運(yùn)用X射線衍射(XRD)、掃描電鏡(SEM)、熱重分析(TG)等手段對(duì)復(fù)合材料進(jìn)行表征。實(shí)驗(yàn)結(jié)果表明,水熱法制備的復(fù)合材料,納米TiO2更好的均勻生長(zhǎng)在CNTs。在可見光下降解亞甲基藍(lán)的實(shí)驗(yàn)結(jié)果顯示,所制備的復(fù)合材料TiO2/CNTs與單純的TiO2粉體相比較,復(fù)合材料TiO2/CNTs光降解速度更快,且具有更高的光催化降解率。 2.采用低溫處理法,選取脫脂棉花纖維(CFs)作為載體,分別以草酸鈦鉀(K2TiO(C2O4)2),乙酸鋅(Zn(AC)2-2H2O)為前驅(qū)體,制取了TiO2/CFs、ZnO/CFs復(fù)合光催化材料,并采用XRD、SIM、透射電鏡(TEM)和BET比表面積及孔徑分布測(cè)試等表征手段分別對(duì)CFs和TiO2/CFs復(fù)合光催化材料的結(jié)構(gòu)、形貌分析及生長(zhǎng)機(jī)理的探討,并利用TG測(cè)定了半導(dǎo)體氧化物的負(fù)載率。表征結(jié)果顯示納米TiO2、ZnO均勻生長(zhǎng)于碳纖維表面,其中納米Ti02呈排列均勻的針狀團(tuán)簇,納米ZnO的形貌是片狀粒子,且具有較大的比表面積�？梢姽庹丈湎陆到鈦喖谆{(lán)的實(shí)驗(yàn)結(jié)果顯示,與單純的TiO2、ZnO粉體相比較,復(fù)合材料顯現(xiàn)出了更強(qiáng)的光催化效率
[Abstract]:In recent years, with the rapid development of industry, environmental pollution is becoming more and more serious. It has become a very important task in modern society. Various studies have proved that semiconductor photocatalytic technology can directly utilize solar light to degrade pollutants in the environment. In this context, this paper focuses on carbon nanotubes (CNTs). Carbon fiber as the representative of one-dimensional carbon materials is the most widely studied class of new carbon materials, Because of its high specific surface area and excellent electrical conductivity, it has become one of the hot research fields in the field of nanomaterials. CNTsand CFS) were used as carriers, and the methods of low temperature treatment and hydrothermal treatment were adopted. A variety of one-dimensional carbon materials oxide semiconductor composite systems were prepared and their photocatalytic properties were tested and the photocatalytic mechanism was explained reasonably. 1. By hydrothermal method and low temperature method, CNTs was selected as carrier and K _ 2TiOO _ (C _ 2O _ 4) _ 2 as titanium source. Homogeneous TIO _ 2 was successfully loaded on CNTs. The composite was characterized by means of X-ray diffraction, scanning electron microscope (SEM), thermogravimetric analysis (TG), etc. The experimental results showed that the composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TG). The results of degradation of methylene blue in visible light showed that compared with the pure TiO2 powder, the photodegradation rate of the composite TiO2/CNTs was faster than that of the pure TiO2 powder, and the photodegradation rate of the composite TiO2/CNTs was higher than that of the pure TiO2 powder, and the photodegradation rate of the composite TiO2/CNTs was higher than that of the pure TiO2 powder. And the photocatalytic degradation rate is higher. 2. The composite photocatalytic materials of TIO _ 2 / CFS / ZnO _ 2 / C _ 2O _ (2) were prepared by using potassium oxalate K _ 2TiO _ (2) C _ (2) O _ (2) C _ (2) O _ (2) O _ (2) and Zn ~ (2 +) Zn ~ (2 +) H _ (2) H _ (2) as precursor by low temperature treatment. The structure, morphology and growth mechanism of CFs and TiO2/CFs composite photocatalytic materials were characterized by XRDX SIM, TEM (TEM) and BET specific surface area and pore size distribution, respectively. The loading ratio of semiconductor oxide was measured by TG. The results showed that nano-TiO _ 2ZnO was homogeneously grown on the surface of carbon fiber, in which nano-sized Ti02 was a well-arranged needle-like cluster, and the morphology of nanometer ZnO was flake. The experimental results of degradation of methylene blue under visible light showed that the composite showed higher photocatalytic efficiency than the pure TIO _ 2O _ 2 ZnO powder.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：O643.36;TB33

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本文編號(hào)：1618014