納米二氧化鈦及其喹吖啶酮復(fù)合材料的合成及光催化性能
發(fā)布時(shí)間：2018-11-09 16:18
【摘要】：二氧化鈦具有特殊的半導(dǎo)體性質(zhì),應(yīng)用廣泛。作為一種新型功能材料,納米二氧化鈦材料被認(rèn)為是目前最有前途的光催化劑。為了克服二氧化鈦本身存在的一些不足,研究者們探索了多種方法以進(jìn)一步改善其光催化性能,如改變二氧化鈦形貌及對(duì)二氧化鈦進(jìn)行摻雜等。目前的研究表明,二氧化鈦納米管相對(duì)于二氧化鈦納米粒子及其他形貌的二氧化鈦納米材料來說,光催化性能更好。本文以二氧化鈦納米粒子為原料,合成了二氧化鈦納米管(TiNT)和具有層次結(jié)構(gòu)的花型二氧化鈦材料(HFT),并用喹吖啶酮這種具有高穩(wěn)定性及優(yōu)良光敏特性的顏料對(duì)TiNT改性,合成了喹吖啶酮@TiNT復(fù)合材料(QATi)。主要工作如下:(1)以銳鈦型二氧化鈦納米粒子(TiNP)為原料,在強(qiáng)堿溶液中,通過水熱法合成了HFT材料,并使用掃描電子顯微鏡(SEM),透射電子顯微鏡(TEM),X-射線衍射儀(XRD),傅立葉紅外轉(zhuǎn)換儀(FITR),熱重分析儀(TG)等儀器對(duì)該材料進(jìn)行了表征,探究了其對(duì)亞甲基藍(lán)的吸附能力和紫外光下的光催化性能。結(jié)果表明,該樣品是以一維納米片為花瓣而形成的多層花狀結(jié)構(gòu),顯示出部分斜方晶Na_2Ti_3O_7晶型。在30分鐘內(nèi),30 mg的花狀材料對(duì)100 ml 20 mg/L的亞甲基藍(lán)溶液的吸附率為85%;在90分鐘時(shí),降解率為99%。(2)以TiNP為原料,在強(qiáng)堿溶液中,用水熱法合成了TiNT,采用多種手段對(duì)其進(jìn)行了表征,并探究了該納米管對(duì)亞甲基藍(lán)的光催化降解能力。結(jié)果表明,所制備的材料為相互纏繞的納米管,具有氫化鈦酸鹽的單斜晶體結(jié)構(gòu)。在紫外光的照射下,TiNT對(duì)亞甲基藍(lán)溶液的光催化性活性很高,在110分鐘時(shí),光降解率達(dá)到了99%,循環(huán)使用的效果也很理想。(3)在合成TiNT的基礎(chǔ)上,我們利用水熱法一步合成了喹吖啶酮@TiNT復(fù)合材料(QATi),并對(duì)樣品進(jìn)行了一系列的表征,研究了該復(fù)合材料的紫外及可見光光催化性能,探討了合成條件對(duì)光催化性能的影響。結(jié)果顯示,QA的加入沒有改變納米管的形貌及晶體結(jié)構(gòu),但由于QA和TiNT之間的協(xié)同效應(yīng)及體系中存在的氫鍵網(wǎng)絡(luò)結(jié)構(gòu),QATi復(fù)合材料的光吸收和光生電荷的轉(zhuǎn)移及分離得到了極大的改善,顯示出優(yōu)異的光降解活性:紫外光照射下,80分鐘內(nèi)亞甲基藍(lán)的降解率達(dá)到99.9%;可見光照射下,120分鐘內(nèi)亞甲基藍(lán)的降解率達(dá)96.3%,且具有良好的循環(huán)使用性能。
[Abstract]:Titanium dioxide has special semiconductor properties and is widely used. As a new functional material, nano-TiO _ 2 is considered as the most promising photocatalyst. In order to overcome some shortcomings of titanium dioxide, researchers have explored various methods to further improve its photocatalytic performance, such as changing the morphology of titanium dioxide and doping titanium dioxide. Recent studies have shown that titanium dioxide nanotubes have better photocatalytic properties than titanium dioxide nanoparticles and other TIO _ 2 nanomaterials. In this paper, TIO _ 2 nanotubes (TiNT) and patterned TIO _ 2 (HFT),) were synthesized by using titanium dioxide nanoparticles as raw materials, and TiNT was modified with quinacridone, a pigment with high stability and excellent Guang Min properties. Quinacridone @ TiNT composite (QATi). Was synthesized. The main works are as follows: (1) HFT materials were synthesized by hydrothermal method in strong alkali solution using anatase TIO _ 2 nano-particle (TiNP) as raw material and (SEM), transmission electron microscope (TEM),) was used as scanning electron microscope (SEM). X- ray diffractometer (XRD), Fourier transform infrared transform instrument (FITR),) thermogravimetric analyzer (TG) and other instruments were used to characterize the material. The adsorption ability of methylene blue and photocatalytic activity under ultraviolet light were investigated. The results show that the sample is a multilayer flower-like structure with one-dimensional nanochip as the petal, showing partial obliquity square crystal Na_2Ti_3O_7 crystal form. Within 30 minutes, the adsorption rate of 30 mg flower-like material to methylene blue solution of 100 ml 20 mg/L was 85; At 90 minutes, the degradation rate was 99%. (2) TiNT, was synthesized by hydrothermal method in strong alkali solution with TiNP as raw material, and the photocatalytic degradation of methylene blue was investigated by various means. The results show that the materials are intertwined nanotubes with monoclinic crystal structure of hydrogenated titanate. The photocatalytic activity of TiNT to methylene blue solution was very high under ultraviolet light irradiation. The photodegradation rate reached 99% at 110min, and the effect of recycling was very good. (3) on the basis of synthesizing TiNT, Quinacridone @ TiNT composite (QATi), was synthesized by hydrothermal method and characterized by a series of characterization. The UV and visible photocatalytic properties of the composite were studied. The effect of synthesis conditions on photocatalytic performance was discussed. The results show that the addition of QA does not change the morphology and crystal structure of nanotubes, but due to the synergistic effect between QA and TiNT and the existence of hydrogen bond network structure in the system, The photoabsorption and photocharge transfer and separation of QATi composites have been greatly improved, showing excellent photodegradation activity: under UV irradiation, the degradation rate of methylene blue reaches 99.9% within 80 minutes; Under visible light irradiation, the degradation rate of methylene blue reached 96.3% within 120 minutes and had good recycling performance.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36;O644.1
本文編號(hào)：2320922
[Abstract]:Titanium dioxide has special semiconductor properties and is widely used. As a new functional material, nano-TiO _ 2 is considered as the most promising photocatalyst. In order to overcome some shortcomings of titanium dioxide, researchers have explored various methods to further improve its photocatalytic performance, such as changing the morphology of titanium dioxide and doping titanium dioxide. Recent studies have shown that titanium dioxide nanotubes have better photocatalytic properties than titanium dioxide nanoparticles and other TIO _ 2 nanomaterials. In this paper, TIO _ 2 nanotubes (TiNT) and patterned TIO _ 2 (HFT),) were synthesized by using titanium dioxide nanoparticles as raw materials, and TiNT was modified with quinacridone, a pigment with high stability and excellent Guang Min properties. Quinacridone @ TiNT composite (QATi). Was synthesized. The main works are as follows: (1) HFT materials were synthesized by hydrothermal method in strong alkali solution using anatase TIO _ 2 nano-particle (TiNP) as raw material and (SEM), transmission electron microscope (TEM),) was used as scanning electron microscope (SEM). X- ray diffractometer (XRD), Fourier transform infrared transform instrument (FITR),) thermogravimetric analyzer (TG) and other instruments were used to characterize the material. The adsorption ability of methylene blue and photocatalytic activity under ultraviolet light were investigated. The results show that the sample is a multilayer flower-like structure with one-dimensional nanochip as the petal, showing partial obliquity square crystal Na_2Ti_3O_7 crystal form. Within 30 minutes, the adsorption rate of 30 mg flower-like material to methylene blue solution of 100 ml 20 mg/L was 85; At 90 minutes, the degradation rate was 99%. (2) TiNT, was synthesized by hydrothermal method in strong alkali solution with TiNP as raw material, and the photocatalytic degradation of methylene blue was investigated by various means. The results show that the materials are intertwined nanotubes with monoclinic crystal structure of hydrogenated titanate. The photocatalytic activity of TiNT to methylene blue solution was very high under ultraviolet light irradiation. The photodegradation rate reached 99% at 110min, and the effect of recycling was very good. (3) on the basis of synthesizing TiNT, Quinacridone @ TiNT composite (QATi), was synthesized by hydrothermal method and characterized by a series of characterization. The UV and visible photocatalytic properties of the composite were studied. The effect of synthesis conditions on photocatalytic performance was discussed. The results show that the addition of QA does not change the morphology and crystal structure of nanotubes, but due to the synergistic effect between QA and TiNT and the existence of hydrogen bond network structure in the system, The photoabsorption and photocharge transfer and separation of QATi composites have been greatly improved, showing excellent photodegradation activity: under UV irradiation, the degradation rate of methylene blue reaches 99.9% within 80 minutes; Under visible light irradiation, the degradation rate of methylene blue reached 96.3% within 120 minutes and had good recycling performance.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36;O644.1
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