Fig. 2 shows the XRD patterns of the TiO2powers. It can be seen that the phase of it exist in anatase form. Nano-TiO2particles can be divided into anatase, rutile and brookite. Anatase and rutile nano- TiO2are tetragonal systems, while the brookite is a rhombohedral system[5,6]. And for now the nano-TiO2photocatalysts are mainly Anatase and rutile.
　　
　　Figure 2. XRD patterns of as prepared TiO2powers
　　
　　
　　Figure 3. XRD patterns of as prepared N-doped TiO2powers
　　
　　
　　Figure 4. XRD patterns of as prepared B-doped TiO2powers
　　Different from TiO2powers, Fig. 3. shows N-doped TiO2powers is a mixed crystal structure containing both anatase and rutile. The same results also appeared in Fig.4. Anatase and rutile nano-TiO2have different densities and electronic band structure because the difference in the manner of connection .The mass density of Anatase TiO2(3.894g/cm3) slightly less than the rutile (4.250g/cm3) and the band gap of anatase-TiO2(Eg 3.3ev), slightly larger than rutile (Eg 3.1ev)[7]. The different structural characteristics directly led to the ability of rutile in oxidation and the adsorption capacity of organic matter better than anatase. While, anatase form made it easier to separate the photo-generated electron and cavity as the larger surface area they have. These factors make the photocatalytic of anatase TiO2more activity than rutile form[8].
　3.2. N-doped and B-doped TiO2thin films loaded fabric
　　In order to improve the photocatalytic activity of TiO2thin films loaded fabric under irradiation of the visible light, N-doped and B-doped was performed on. Then the molar ratio of titanium dioxide and compound were determined, the processes of pretreatment also were optimized.
　　3.2.1 N-dopedTiO2thin films loaded fabric
　　N-doped TiO2thin films loaded fabric was prepared with the molar ratio of N and butyl titanate were collected from 1:1; 1:2;1:3; 1:5 and 1:10, according to degrade the dye solution they all be tested for catalytic activity. Results are given in TableⅠ:
　　Table i. The influence of different ratios on dye degradation
　　
　　We can know from TableⅠ that the doping ratio of 1:1 sol can make the N-doped TiO2thin films loaded fabric obtain the highest activity under the irradiation of visible-light.
　　Fig. 5 shows the curing temperature effect on the degradation of TiO2thin films loaded fabric. As the temperature increased while the degradation rate of Reactive Red MS has dropped. While, Fig. 6 shows the fixation time effect on the degradation of TiO2thin films loaded fabric. It could be known that the catalytic activity increased as the curing time increased from 1 to 2min and further increase in the fixation time above 2min would make the drop of the degradation rate
　　 Figure 5. Effect of different curing temperature treatments on degradation rate of Reactive Red MS
　　
　　
　　Figure 6. Effect of different curing timetreatments on degradation rate of Reactive Red MS
　　3.2.2 B-doped TiO2thin films loaded fabric
　　B-doped TiO2thin films loaded fabric was prepared with the molar ratio of B and butyl titanate were collected from 1:1; 3:4;1:2;1:3; 1:5 and 1:10, according to degrade the dye solution they all be tested for catalytic activity. Results are given in Fig. 7
　　
　　
　　Figure 7. The influence of different ratios on dye degradation
　　Table Ⅱshows the curing temperature effect on the degradation of TiO2thin films loaded fabric. As the temperature increased while the degradation rate of Reactive Red MS has dropped. It also shows the fixation time effect on the degradation of TiO2thin films loaded fabric. It could be known that the catalytic activity increased as the curing time increased from 1 to 2min and further increase in the fixation time above 2min would make the drop of the degradation rate.
　　TableⅡEffect Of Different Curing Temperature And Time Treatments On Degradation Rate Of Reactive Red Ms
　　
　　Figure 8. The representation of Reactive Red MS before and after degrade 5 hours
　　As a whole, at the condition of the appropriate ratio of 1:1, curing temperature at 80 ℃ and the conditions of cure 2min prepared N-doped TiO2thin films loaded fabric can obtain the highest activity of degradation to Reactive Red MS. The obvious comparison between before and after degradation can be seen in Fig.8.
　　3.3.UV–Vis spectra of dye solution
　　
　　
　　Figure 9. Change of UV-Visible spectrum of reactive red MS
By comparison between curves shown in Fig.9 two absorption maximum wavelength at 598nm and 310nm as the characteristic of Reactive Red MS appeared at the beginning, and with the extension of reaction time, the peaks of dye solution in the UV-visible absorption curves began to decline. It has noticed that an absorption peak increasing at 210nm. (责任编辑：南粤论文中心)转贴于南粤论文中心: http://www.nylw.net(南粤论文中心__代写代发论文_毕业论文带写_广州职称论文代发_广州论文网）