In-situ N-doped ordered mesoporous titania was synthesized by a simple solvent evaporation induced aggregating assembly (EIAA) method using lab-made amphiphilic diblock copolymer polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) as a structure directing agent and titanium tetrabutoxide (TBOT) as a titanium source. The obtained N-doped mesoporous titanium dioxide materials had a pore size of ∼6.2 nm, a large accessible surface area of 119 m² g^-1 and a large pore volume of 0.160 cm³ g^-1, respectively, which facilitated the diffusion and transport of gas molecules. The as-prepared samples were characterized by the FT-IR spectra, Raman spectra, X-ray photoelectron spectroscopy and UV–vis absorption spectroscopy. The results showed that the nitrogen atoms were in situ incorporated into the lattice of TiO₂, thus resulting in smaller crystallite size and more defects, which facilitated promoting gas sensing performance. Its response reached 17.6 for 250 ppm acetone, which was 11.4 times higher than that of their undoped TiO₂-based sensors (1.54 for 250 ppm), and the fast response and recovery time were 4s and 4s, respectively.

采用实验室制备的两亲性二嵌段共聚物聚苯乙烯-b-聚（4-乙烯基吡啶）（PS- b - P4VP）为结构，通过简单的溶剂蒸发诱导聚集法（EIAA）合成了原位掺N的有序介孔二氧化钛。定向剂和四丁氧基钛（TBOT）作为钛源。所得的N掺杂的介孔二氧化钛材料的孔径为〜6.2nm，可及表面积大为119m ²  g ^-1，大孔容积为0.160cm ³  g ^-1。分别促进了气体分子的扩散和运输。制备的样品通过FT-IR光谱，拉曼光谱，X射线光电子能谱和UV-vis吸收光谱进行表征。结果表明，氮原子被原位掺入TiO ₂的晶格中，从而导致晶粒尺寸减小，缺陷增多，有利于提高气体传感性能。对于250 ppm丙酮，其响应达到17.6，这是其未掺杂的TiO ₂基传感器的响应（对于250 ppm为1.54）的11.4倍，并且快速响应和恢复时间分别为4s和4s。