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以钛酸丁酯(Ti(OC4H9)4)为前躯体,尿素(CO(NH2)2)为N源,采用胶溶-回流法制备了N掺杂的TiO2,利用浸渍提拉法将其负载到活性炭纤维(Activated Carbon Fiber,ACF)表面,制得TiO2/ACF复合材料,运用X射线衍射(X-Ray Diffraction,XRD)、X射线光电子能谱(X-ray Photoelectron Spectroscopy,XPS)、紫外-可见漫反射光谱(Uvvis-Diffuse Reflection Spectroscopy,Uv-vis-DRS)、氮气吸附法(Brunauer-Emmertt-Teller,BET)等手段对复合材料进行了表征,考察了复合材料光催化降解气相甲醛的性能。研究结果表明:提高回流温度有利于抑制TiO2由锐钛矿型向金红石型转变;掺入氮元素可以抑制TiO2晶粒的生长,同时其激发光源从紫外光区拓展到了可见光区,但在紫外光区的吸光度有所下降;当回流温度为80℃、煅烧温度为400℃、掺氮量为1%时,复合材料对甲醛的去除率最高,可达到82.1%。
Using Ti (OC4H9) 4 as precursor and urea (CO (NH2) 2) as N source, N-doped TiO2 was prepared by peptizing-reflux method and its loading (ACF) on the surface of ACF. TiO2 / ACF composites were prepared and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) The composite materials were characterized by Uvvis-Diffuse Reflection Spectroscopy (Uv-vis-DRS) and nitrogen adsorption (Brunauer-Emmertt-Teller, BET). The photocatalytic degradation of gas phase formaldehyde . The results show that increasing the reflow temperature is beneficial to the inhibition of the transition from anatase to rutile. The incorporation of nitrogen into TiO2 can inhibit the growth of TiO2 crystal. At the same time, the excitation light source extends from the ultraviolet region to the visible region. However, The absorbency of the composites decreased slightly. When the reflux temperature was 80 ℃, the calcination temperature was 400 ℃ and the content of nitrogen was 1%, the removal rate of formaldehyde to the composites was the highest (82.1%).