文献类型：期刊文献

英文题名：TiO2 (B) nanotubes with ultrathin shell for highly efficient photocatalytic fixation of nitrogen

作者：Wu, Shiqun[1,2];Tan, Xianjun[1,2];Liu, Kaida[1,2];Lei, Juying[1,2];Wang, Lingzhi[1,2];Zhang, Jinlong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：335

起止页码：214

外文期刊名：CATALYSIS TODAY

收录：;EI(收录号：20184806148199);WOS:【SCI-EXPANDED(收录号:WOS:000475744800025)】；

基金：This work was supported by the National Natural Science Foundation of China (21673073, 21677048 and 5171101651), the Science and Technology Commission of Shanghai Municipality (18520710200, 16JC1401400, 17520711500), Shanghai Pujiang Program (18PJD012) and the Fundamental Research Funds for the Central Universities, PetroChina Innovation Foundation (2015D-5006-0402) and the Fundamental Research Funds for the Central Universities (222201717003, 22221818014).

语种：英文

外文关键词：Nitrogen fixation; TiO2 nanotube; Photocatalysis; Defects

摘要：Photocatalytic fixation of nitrogen under the mild condition is a green and promising ammonia synthesis strategy, which however is still a big challenge due to the high activation energy for nitrogen. Herein, we report the photocatalytic fixation of nitrogen on TiO2 (B) nanotubes with large specific surface area (344m(2)/g), the ultrathin shell and submicrometer-sized cavity (ca. 250 nm). A high yield of 106.6 mu molg(-1) h(-1) for NH3 under simulated sunlight irradiation was achieved at room temperature, which is 1.61 times the yield on TiO2 nanosheets. Based on the results from EPR, photoluminescence and photo-electrochemical analyses, the improved activity is attributed to the efficient nitrogen activation by the abundant surface defects and the enhanced light utilization on nanotube with the multiple light-scattering effect. Moreover, the photocatalytic activity of TiO2 (B) nanotubes can be well preserved for 4 cycles. This study provides a new approach for rational designing of efficient photocatalysts toward stable and robust nitrogen fixation in mild conditions.