通过气相生长制备晶格掺杂 TiO 纳米纤维以实现可见光驱动的 N 转化为氨。

Fabrication of Lattice-Doped TiO Nanofibers by Vapor-Phase Growth for Visible Light-Driven N Conversion to Ammonia.

机构信息

State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China.

出版信息

ACS Appl Mater Interfaces. 2018 Oct 31;10(43):37453-37460. doi: 10.1021/acsami.8b15174. Epub 2018 Oct 22.

DOI:10.1021/acsami.8b15174

PMID:30345747

Abstract

In the past decades, enormous efforts have been made to synthesize photocatalysts for N conversion driven by visible light. However, it is still a major challenge to develop an efficient photocatalyst. In this paper, monodoped and codoped TiO nanofibers were fabricated by vapor-phase growth. Vapor-phase implantation of the guest atoms into TiO nanofibers may greatly prolong the lifetime of electron-hole pairs. The doped TiO nanofibers were demonstrated to be an excellent photocatalyst for nitrogen photofixation under a 300 W Xe-lamp irradiation. The amount of ammonia produced over the Fe, V codoped TiO nanofibers reached 14 783 μmol/L·g-cata after irradiation for 2 h. The strategy could be easily extended to prepare other species doped TiO nanofibers as high-efficiency photocatalysts.

摘要

在过去的几十年中，人们为了合成可见光驱动的氮转化光催化剂付出了巨大的努力。然而，开发高效光催化剂仍然是一个重大挑战。在本文中，通过气相生长法制备了单掺杂和共掺杂的 TiO 纳米纤维。将客体原子气相注入 TiO 纳米纤维中可能会大大延长电子-空穴对的寿命。实验结果表明，在 300 W Xe 灯照射下，掺杂 TiO 纳米纤维是一种用于氮气光固定的优异光催化剂。在照射 2 小时后，Fe、V 共掺杂 TiO 纳米纤维上生成的氨的量达到 14783 μmol/L·g-cata。该策略可以很容易地扩展到制备其他掺杂的 TiO 纳米纤维作为高效光催化剂。