Department of Chemistry, University of Calicut, Kerala, 673 635 India.
Nanoscale. 2015 Dec 7;7(45):19184-92. doi: 10.1039/c5nr05975e. Epub 2015 Nov 2.
Green and rapid microwave syntheses of 'yellow oxygen rich' (YAT-150) and 'black oxygen vacancy rich' (BAT-150) anatase TiO2 nanoparticles are reported for the first time. YAT-150 was synthesized using only titanium(iv) butoxide and water as precursors. The in situ precursor modification by Mn(ii) acetate switched anatase TiO2 from YAT-150 to BAT-150. The entry of Mn(2+) into the crystal lattice of anatase TiO2 paved the way for peak texturing in the existing peak orientations along with the origin of three new anatase TiO2 peaks in the (103), (213) and (105) directions. The as synthesized ultra-small (∼5 nm) yellow and black anatase TiO2 nanoparticles were found to be two fold and four fold more photoactive than the commercially available photocatalyst Degussa-P25 under sunlight illumination.
首次报道了“黄富氧”（YAT-150）和“黑氧空位富”（BAT-150）锐钛矿 TiO2 纳米粒子的绿色快速微波合成。仅使用钛（iv）丁醇和水作为前驱体即可合成 YAT-150。Mn（ii）醋酸盐的原位前体修饰将锐钛矿 TiO2 从 YAT-150 转变为 BAT-150。Mn（2+）进入锐钛矿 TiO2 的晶格，为现有峰取向的峰纹理化开辟了道路，同时在（103）、（213）和（105）方向出现了三个新的锐钛矿 TiO2 峰。所合成的超小（∼5nm）黄色和黑色锐钛矿 TiO2 纳米粒子在阳光照射下比市售光催化剂 Degussa-P25 的光活性高两倍和四倍。
