Departament de Química, Universitat Autònoma de Barcelona, Campus UAB, 08193 Bellaterra, Spain.
J Colloid Interface Sci. 2010 Apr 15;344(2):327-33. doi: 10.1016/j.jcis.2009.12.063. Epub 2010 Jan 11.
Nanocrystalline titania powders doped with either zirconium or silicon were synthesized at low temperature via destabilization of ionic-liquid-like precursors. Titania materials prepared at low temperature (85 degrees C) consisted of anatase nanocrystals of about 25 nm, according to powder X-ray diffraction and transmission electron microscopy. Dopant incorporation was evaluated using inductively coupled plasma-optical emission spectrometry, and it was found that dopant/titanium ratios in the powder (0.011 for Zr and 0.026 for Si) were lower than those in the precursor (0.11 for both). Low-temperature nitrogen adsorption-desorption isotherms displayed the characteristic hysteresis loop of mesoporous materials. Specific surface areas reached values of 130 and 155 m(2) g(-1) for Zr-doped and Si-doped TiO(2), respectively. The photocatalytic activity of the synthesized nanopowders was tested using methyl orange and 4-chlorophenol as target pollutants.
纳米晶二氧化钛粉末掺杂锆或硅，通过离子液体状前体的失稳，在低温下合成。低温（85°C）下制备的二氧化钛材料由约 25nm 的锐钛矿纳米晶组成，这是通过粉末 X 射线衍射和透射电子显微镜得出的结果。采用电感耦合等离子体-光学发射光谱法评估掺杂剂的掺入情况，发现粉末中的掺杂剂/钛比值（Zr 为 0.011，Si 为 0.026）低于前体中的比值（Zr 和 Si 均为 0.11）。低温氮气吸附-解吸等温线显示出介孔材料的特征滞后环。Zr 掺杂和 Si 掺杂 TiO2 的比表面积分别达到 130 和 155 m2/g。通过甲基橙和 4-氯苯酚作为目标污染物，测试了合成纳米粉末的光催化活性。
